DS1624S现货热卖使用介绍供应商报价哪里找芯片批发报价-中国IC网-芯三七

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产品型号DS1624S的概述

DS1624S芯片概述 DS1624S是一款高性能的数字温度传感器，专为温度监测系统而设计。该芯片能在多个应用场合中提供精确的温度读数，广泛应用于工业控制、环境监测和消费电子产品等领域。DS1624S的独特之处在于其内置的数字温度计以及提供的多种接口，使得用户在使用时更加便利。该芯片的主要功能包括温度测量、报警功能，以及通过数字接口传输数据。DS1624S采用了高分辨率的数字输出，可以有效降低模拟信号处理产生的误差，从而提高温度采集的准确性。此外，DS1624S还支持多种流行的数据通信协议，使其在各种设备中应用变得更加灵活。 DS1624S的详细参数 DS1624S的主要参数如下： 1. 工作温度范围：-55°C至+125°C 2. 温度测量精度：±0.5°C（在-10°C至+85°C区间内） 3. 输出方式：数字输出 4. 分辨率：9位至 12 位可编程 5. 供电电压范围：+3....

产品型号DS1624S的Datasheet PDF文件预览

19-6288; Rev 5/12

DS1624

Digital Thermometer and Memory

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

. Temperature measurements require no

external components

SDA

SCL

V_DD

A₀

. Measures temperatures from -55°C to +125°C

in 0.03125°C increments. Fahrenheit

equivalent is -67°F to +257°F in 0.05625°F

increments

A₁

GND

A₂

. Temperature is read as a 13-bit value (two

byte transfer)

DS1624S 8-PIN SOIC (208 MIL)

. Converts temperature to digital word in 1

second (max)

. 256 bytes of E²memory on board for storing

information such as frequency compensation

coefficients

SDA

SCL

V_DD

A₀

A₁

. Data is read from/written via a 2-wire serial

interface (open drain I/O lines)

. Applications include temperature-

compensated crystal oscillators for test

equipment and radio systems

GND

A₂

DS1624 8-PIN PDIP (300 MIL)

. 8-pin DIP or SOIC packages

PIN DESCRIPTION

SDA - 2-Wire Serial Data Input/Output

SCL - 2-Wire Serial Clock

GND - Ground

- Chip Address Input

V_DD- Power Supply (+2.7V to +5.5V)

NC - No Connection

DESCRIPTION

The DS1624 consists of a digital thermometer and 256 bytes of E²memory. The thermometer provides

13-bit temperature readings which indicate the temperature of the device. The E²memory allows a user to

store frequency compensation coefficients for digital correction of crystal frequency due to temperature.

Any other type of information may also reside in this user space.

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DS1624

ORDERING INFORMATION

ORDERING

INFORMATION

DS1624+

PACKAGE

MARKING

DS1624

DESCRIPTION

DS1624 in Lead-Free 300 mil 8-pin DIP

DS1624 in Lead-Free 208 mil 8-pin SO

DS1624 in Lead-Free 208 mil 8-pin SO, 2000 Piece Tape-

and-Reel

DS1624S+

DS1624S+T&R

DS1624S

A “+” symbol will also be marked on the package near the Pin 1 indicator.

DETAILED PIN DESCRIPTION Table 1

SYMBOL

SDA

SCL

DESCRIPTION

Data input/output pin for 2-wire serial communication port.

Clock input/output pin for 2-wire serial communication port.

No connect. No Internal Connection.

Ground pin.

GND

Address input pin.

V_DD

Supply Voltage 2.7V to 5.5V input power pin.

OVERVIEW

A block diagram of the DS1624 is shown in Figure 1. The DS1624 consists of two separate functional

units: 1) a 256–byte nonvolatile E²memory, and 2) a direct–to–digital temperature sensor.

The nonvolatile memory is made up of 256 bytes of E²memory. This memory may be used to store any

type of information the user wishes; for example, frequency compensation coefficients may be placed in

this memory to allow for compensation of measured frequency depending upon the temperature at which

the measurement is made. These memory locations are accessed through the 2–wire serial bus.

The direct to digital temperature sensor allows the DS1624 to measure the ambient temperature and

report the temperature value in a 13–bit word, with 0.03125°C resolution. The temperature sensor and its

related registers are accessed through the 2–wire serial interface.

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DS1624

DS1624 FUNCTIONAL BLOCK DIAGRAM Figure 1

STATUS REGISTER &

V_DD

CONTROL LOGIC

SCL

SDA

TEMPERATURE SENSOR

ADDRESS

AND

I/O CONTROL

EEPROM MEMORY (256 BYTES)

GND

2-WIRE SERIAL DATA BUS

The DS1624 supports a bi–directional two–wire bus and data transmission protocol. A device that sends

data onto the bus is defined as a transmitter, and a device receiving data as a receiver. The device that

controls the message is called a “master”. The devices that are controlled by the master are “slaves”. The

bus must be controlled by a master device which generates the serial clock (SCL), controls the bus access,

and generates the START and STOP conditions. The DS1624 operates as a slave on the two–wire bus.

Connections to the bus are made via the open–drain I/O lines SDA and SCL. The following bus protocol

has been defined (See Figure 2):

• Data transfer may be initiated only when the bus is not busy.

• During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in

the data line while the clock line is high will be interpreted as control signals.

Accordingly, the following bus conditions have been defined:

Bus not busy: Both data and clock lines remain HIGH.

Start data transfer: A change in the state of the data line, from HIGH to LOW, while the clock is HIGH,

defines a START condition.

Stop data transfer: A change in the state of the data line, from LOW to HIGH, while the clock line is

HIGH, defines the STOP condition.

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DS1624

Data valid: The state of the data line represents valid data when, after a START condition, the data line

is stable for the duration of the HIGH period of the clock signal. The data on the line must be changed

during the LOW period of the clock signal. There is one clock pulse per bit of data.

Each data transfer is initiated with a START condition and terminated with a STOP condition The

number of data bytes transferred between START and STOP conditions is not limited, and is determined

by the master device. The information is transferred byte–wise and each receiver acknowledges with a

ninth bit.

Within the bus specifications a regular mode (100 KHz clock rate) and a fast mode (400 KHz clock rate)

are defined. The DS1624 works in both modes.

Acknowledge: Each receiving device, when addressed, is obliged to generate an acknowledge after the

reception of each byte. The master device must generate an extra clock pulse which is associated with this

acknowledge bit.

A device that acknowledges must pull down the SDA line during the acknowledge clock pulse in such a

way that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse. Of

course, setup and hold times must be taken into account. A master must signal an end of data to the slave

by not generating an acknowledge bit on the last byte that has been clocked out of the slave. In this case,

the slave must leave the data line HIGH to enable the master to generate the STOP condition.

DATA TRANSFER ON 2-WIRE SERIAL BUS Figure 2

Figure 2 details how data transfer is accomplished on the two–wire bus. Depending upon the state of the

bit, two types of data transfer are possible:

1. Data transfer from a master transmitter to a slave receiver. The first byte transmitted by the

master is the slave address. Next follows a number of data bytes. The slave returns an acknowledge

bit after each received byte.

2. Data transfer from a slave transmitter to a master receiver. The first byte (the slave

address) is transmitted by the master. The slave then returns an acknowledge bit. Next follows a

number of data bytes transmitted by the slave to the master. The master returns an acknowledge bit

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DS1624

after all received bytes other than the last byte. At the end of the last received byte, a ‘not

acknowledge’ is returned.

The master device generates all of the serial clock pulses and the START and STOP conditions. A

transfer is ended with a STOP condition or with a repeated START condition. Since a repeated START

condition is also the beginning of the next serial transfer, the bus will not be released.

The DS1624 may operate in the following two modes:

1. Slave receiver mode: Serial data and clock are received through SDA and SCL. After each byte is

received an acknowledge bit is transmitted. START and STOP conditions are recognized as the

beginning and end of a serial transfer. Address recognition is performed by hardware after reception

of the slave address and direction bit.

2. Slave transmitter mode: The first byte is received and handled as in the slave receiver mode.

However, in this mode the direction bit will indicate that the transfer direction is reversed. Serial data

is transmitted on SDA by the DS1624 while the serial clock is input on SCL. START and STOP

conditions are recognized as the beginning and end of a serial transfer.

SLAVE ADDRESS

A control byte is the first byte received following the START condition from the master device. The

control byte consists of a four bit control code; for the DS1624, this is set as 1001 binary for read and

write operations. The next three bits of the control byte are the device select bits (A2, A1, A0). They are

used by the master device to select which of eight devices are to be accessed. These bits are in effect the

three least significant bits of the slave address. The last bit of the control byte (R/

) defines the

operation to be performed. When set to a “1”, a read operation is selected, when set to a “0”, a write

operation is selected. Following the START condition the DS1624 monitors the SDA bus checking the

device type identifier being transmitted. Upon receiving the 1001 code and appropriate device select bits,

the slave device outputs an acknowledge signal on the SDA line.

2-WIRE SERIAL COMMUNICATION WITH DS1624 Figure 3

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DS1624

OPERATION-MEASURING TEMPERATURE

A block diagram of the DS1624 is shown in Figure 1. The DS1624 measures temperatures through the

use of an on–board proprietary temperature measurement technique. A block diagram of the temperature

measurement circuitry is shown in Figure 4.

The DS1624 measures temperature by counting the number of clock cycles that an oscillator with a low

temperature coefficient goes through during a gate period determined by a high temperature coefficient

oscillator. The counter is preset with a base count that corresponds to –55°C. If the counter reaches zero

before the gate period is over the temperature register, which is also preset to the –55°C value, is

incremented indicating that the temperature is higher than –55°C.

At the same time, the counter is preset with a value determined by the slope accumulator circuitry. This

circuitry is needed to compensate for the parabolic behavior of the oscillators over temperature. The

counter is then clocked again until it reaches zero. If the gate period is still not finished, then this process

repeats.

The slope accumulator is used to compensate for the nonlinear behavior of the oscillators over

temperature, yielding a high resolution temperature measurement. This is done by changing the number

of counts necessary for the counter to go through for each incremental degree in temperature. To obtain

the desired resolution, both the value of the counter and the number of counts per °C (the value of the

slope accumulator) at a given temperature must be known.

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DS1624

TEMPERATURE MEASURING CIRCUITRY Figure 4

SLOPE ACCUMULATOR

PRESET

COMPARE

LOW TEMPERATURE

COEFFICIENT OSCILLATOR

SET/CLEAR

LSB

COUNTER

PRESET

INC

TEMPERATURE REGISTER

HIGH TEMPERATURE

COEFFICIENT OSCILLATOR

COUNTER

STOP

Internally, this calculation is performed by the DS1624 to provide 0.03125°C resolution. The temperature

reading is provided in a 13–bit, two’s complement reading by issuing READ TEMPERATURE

command. Table 2 describes the exact relationship of output data to measured temperature. The data is

transmitted serially through the 2–wire serial interface, MSB first. The DS1624 can measure temperature

over the range of -55°C to +125°C in 0.03125°C increments. For Fahrenheit usage a lookup table or

conversion factor must be used.

TEMPERATURE/DATA RELATIONSHIPS Table 2

TEMP

DIGITAL OUTPUT

(Binary)

DIGITAL OUTPUT

(Hex)

+125˚C

+25.0625˚C

+½˚C

0˚C

-½˚C

-25.0625˚C

-55˚C

01111101 00000000

00011001 00010000

00000000 10000000

00000000 00000000

11111111 10000000

11100110 11110000

11001001 00000000

7D00h

1910h

0080h

0000h

FF80h

E6F0h

C900h

Since data is transmitted over the 2–wire bus MSB first, temperature data may be written to/read from the

DS1624 as either a single byte (with temperature resolution of 1°C) or as two bytes, the second byte

containing the value of the 5 least significant bits of the temperature reading as shown in Table 1. Note

that the remaining three bits of this byte are set to all 0’s.

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DS1624

Temperature is represented in the DS1624 in terms of a 0.03125°C LSB, yielding the following 13–bit

format:

MSB

LSB

= +25.0625°C

OPERATION AND CONTROL

A configuration/status register is used to determine the method of operation of the DS1624 will use in a

particular application as well as indicating the status of the temperature conversion operation.

The configuration register is defined as follows:

CONFIGURATION/STATUS REGISTER

DONE

1SHOT

where

DONE = Conversion Done bit. “1” = Conversion complete, “0” = conversion in progress.

1SHOT = One Shot Mode. If 1SHOT is “1”, the DS1624 will perform one temperature conversion upon

receipt of the Start Convert T protocol. If 1SHOT is “0”, the DS1624 will continuously perform

temperature conversions. This bit is nonvolatile and the DS1624 is shipped with 1SHOT = “0”.

Since the configuration register is implemented in E², writes to the register require 10 ms to complete.

After issuing a command to write to the configuration register, no further accesses to the DS1624 should

be made for at least 10 ms.

OPERATION – MEMORY

BYTE PROGRAM MODE

In this mode, the master sends addresses and one data byte to the DS1624.

Following a START condition, the device code (4–bit), the slave address (3 bit), and the R/

bit, which

is logic LOW, are placed onto the bus by the master. The master then sends the Access Memory protocol.

This indicates to the addressed DS1624 that a byte with a word address will follow after it has generated

an acknowledge bit. Therefore, the next byte transmitted by the master is the word address and will be

written into the address pointer of the DS1624. After receiving the acknowledge of the DS1624, the

master device transmits the data word to be written into the addressed memory location. The DS1624

acknowledges again and the master generates a STOP condition. This initiates the internal programming

cycle of the DS1624. A repeated START condition, instead of a STOP condition, will abort the

programming operation.

During the programming cycle the DS1624 will not acknowledge any further accesses to the device until

the programming cycle is complete (approximately 10 ms.)

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DS1624

PAGE PROGRAM MODE

To program the DS1624 the master sends addresses and data to the DS1624 which is the slave. This is

done by supplying a START condition followed by the 4–bit device code, the 3–bit slave address, and the

bit which is defined as a logic LOW for a write. The master then sends the Access Memory

protocol. This indicates to the addressed slave that a word address will follow. The slave outputs the

acknowledge pulse to the master during the ninth clock pulse. When the word address is received by the

DS1624 it is placed in the address pointer defining which memory location is to be written. The DS1624

will generate an acknowledge after every 8–bits received and store them consecutively in an 8–byte RAM

until a STOP condition is detected which initiates the internal programming cycle.

A repeated START condition, instead of a STOP condition, will abort the programming operation.

During the programming cycle the DS1624 will not acknowledge any further accesses to the device until

the programming cycle is complete (approximately 10 ms).

If more than 8 bytes are transmitted by the master the DS1624 will roll over and overwrite the data

beginning with the first received byte. This does not affect erase/ write cycles of the EEPROM array and

is accomplished as a result of only allowing the address register’s bottom 3 bits to increment while the

upper 5 bits remain unchanged. The DS1624 is capable of 50,000 writes (25,000 erase/write cycles)

before EEPROM wear out may occur.

If the master generates a STOP condition after transmitting the first data word, byte programming mode

is entered.

READ MODE

In this mode, the master is reading data from the DS1624 E²memory. The master first provides the slave

address to the device with R/

set to “0”. The master then sends the Access Memory protocol and, after

receiving an acknowledge, then provides the word address, which is the address of the memory location

at which it wishes to begin reading. Note that while this is a read operation the address pointer must first

be written. During this period the DS1624 generates acknowledge bits as defined in the appropriate

section.

The master now generates another START condition and transmits the slave address. This time the R/

bit is set to “1” to put the DS1624 in read mode. After the DS1624 generates the acknowledge bit it

outputs the data from the addressed location on the SDA pin, increments the address pointer, and, if it

receives an acknowledge from the master, transmits the next consecutive byte. This auto-increment

sequence is only aborted when the master sends a STOP condition instead of an acknowledge. When the

address pointer reaches the end of the 256–byte memory space (address FFh) it will increment from the

end of the memory back to the first location of the memory (address 00h).

COMMAND SET

Data and control information is read from and written to the DS1624 in the format shown in Figure 3. To

write to the DS1624, the master will issue the slave address of the DS1624 and the R/

bit will be set to

“0”. After receiving an acknowledge the bus master provides a command protocol. After receiving this

protocol the DS1624 will issue an acknowledge then the master may send data to the DS1624. If the

DS1624 is to be read, the master must send the command protocol as before then issue a repeated START

condition and the control byte again, this time with the R/

bit set to “1” to allow reading of the data

from the DS1624. The command set for the DS1624 as shown in Table 3 is as follows:

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DS1624

Access Memory [17h]

This command instructs the DS1624 to access its E²memory. After issuing this command, the next data

byte is the value of the word address to be accessed. See OPERATION–MEMORY section for detailed

explanations of the use of this protocol and data format following it.

Access Config [ACh]

If R/

is “0”, this command writes to the configuration register. After issuing this command, the next

data byte is the value to be written into the configuration register. If R/

the value stored in the configuration register.

is “1”, the next data byte read is

Read Temperature [AAh]

This command reads the last temperature conversion result. The DS1624 will send two bytes in the

format described earlier, which are the contents of this register.

Start Convert T [EEh]

This command begins a temperature conversion. No further data is required. In one–shot mode the

temperature conversion will be performed and then the DS1624 will remain idle. In continuous mode this

command will initiate continuous conversions.

Stop Convert T [22h]

This command stops temperature conversion. No further data is required. This command may be used to

halt a DS1624 in continuous conversion mode. After issuing this command, the current temperature

measurement will be completed then the DS1624 will remain idle until a Start Convert T is issued to

resume continuous operation.

DS1624 COMMAND SET Table 3

2-WIRE BUS

DATA AFTER

ISSUING

INSTRUCTION

DESCRIPTION

PROTOCOL PROTOCOL

NOTES

TEMPERATURE CONVERSION COMMANDS

Read

Temperature

Reads last converted temperature

value from temperature register.

AAh

<read 2 bytes

data>

Start Convert T Initiates temperature conversion.

Stop Convert T Halts temperature conversion.

EEh

22h

idle

THERMOSTAT COMMANDS

Access Memory Reads or writes to 256-byte

17h

EEPROM memory.

Access Config

Reads or writes configuration data

to configuration register.

ACh

NOTES:

1. In continuous conversion mode a Stop Convert T command will halt continuous conversion. To

restart, the Start Convert T command must be issued. In one–shot mode a Start Convert T command

must be issued for every temperature reading desired.

2. Writing to the E²typically requires 10 ms at room temperature. After issuing a write command, no

further reads or writes should be requested for at least 10 ms.

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DS1624

During the programming cycle the DS1624 will not acknowledge any further accesses to the device until

the programming cycle is complete (approximately 10 ms).

MEMORY FUNCTION EXAMPLE

BUS MASTER DS1624 DATA (MSB

COMMENTS

NOTES

MODE

FIRST)

{Command protocol for configuration register}

{Start here}

START

<cadr,0>

Bus Master Initiates a Start condition.

Bus Master sends DS1624 address;

=”0”;

ACK

ACh

DS1624 generates acknowledge bit.

Bus Master sends Access Config

command protocol.

ACK

00h

DS1624 generates acknowledge bit.

Bus Master sets up DS1624 for continuous

conversion.

ACK

STOP

DS1624 generates acknowledge bit.

Bus Master initiates the STOP condition.

2, 4

{Command protocol for Start Convert T}

{Start here}

START

<cadr,0>

Bus Master initiates a Start condition.

Bus Master sends DS1624 address;

=0;

ACK

EEh

DS1624 generates acknowledge bit.

Bus Master sends Start Convert T

command protocol.

ACK

STOP

DS1624 generates acknowledge bit.

Bus Master initiates the STOP condition.

{Command protocol for reading the Temperature}

{Start here}

START

<cadr,0>

Bus Master initiates a Start condition.

Bus Master sends DS1624 address;

=0;

ACK

AAh

DS1624 generates acknowledge bit.

Bus Master sends Read Temp command

protocol.

ACK

START

DS1624 generates acknowledge bit.

Bus Master initiates a Repeated Start

condition.

<cadr,1>

Bus Master sends DS1624 address;

=1;

ACK

<data>

DS1624 generates acknowledge bit.

DS1624 sends the MSB byte of

Temperature.

ACK

Bus Master generates acknowledge bit.

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DS1624

<data>

DS1624 sends the LSB byte of

Temperature.

BUS MASTER DS1624 DATA (MSB

COMMENTS

NOTES

MODE

FIRST)

NACK

Bus Master sends “NO

ACKNOWLEDGE” bit.

STOP

Bus Master initiates the STOP condition.

{Command protocol for writing to EEPROM}

{Start here}

START

<cadr,0>

Bus Master initiates a Start condition.

Bus Master sends DS1624 address;

=0;

ACK

17h

DS1624 generates acknowledge bit.

Bus Master sends Access Memory

command protocol.

ACK

<madr>

DS1624 generates acknowledge bit.

Bus Master sets the starting memory

address.

ACK

<data>

ACK

<data>

ACK

DS1624 generates acknowledge bit.

Bus Master sends the first byte of data.

DS1624 generates acknowledge bit.

Bus Master sends the second byte of data.

DS1624 generates acknowledge bit.

<data>

ACK

STOP

Bus Master sends the n-th byte of data.

DS1624 generates acknowledge bit.

Bus Master initiates the STOP condition.

2, 4

{Command protocol for reading from EEPROM}

{Start here}

START

<cadr,0>

Bus Master initiates a Start condition.

Bus Master sends DS1624 address;

=0;

ACK

17h

DS1624 generates acknowledge bit.

Bus Master sends Access Memory

command protocol.

ACK

<madr>

DS1624 generates acknowledge bit.

Bus Master sends the starting memory

address.

ACK

START

DS1624 generates acknowledge bit.

Bus Master initiates a Repeated Start

condition.

<cadr,1>

ACK

Bus Master sends DS1624 address;

=1;

DS1624 generates acknowledge bit.

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DS1624

<data>

ACK

DS1624 sends the first byte of data.

Bus Master generates acknowledge bit.

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DS1624

BUS MASTER DS1624 DATA (MSB

COMMENTS

NOTES

MODE

FIRST)

<data>

DS1624 sends the second byte of data.

ACK

Bus Master generates acknowledge bit.

<data>

NACK

DS1624 sends the n-th byte of data.

Bus Master send “NO KWOWLEDGE”

bit.

STOP

Bus Master initiates the STOP condition.

NOTES:

1. If this protocol follows a write and the DS1624 does not acknowledge here, restart the protocol at the

Start here. If it does acknowledge, continue on.

2. Wait for write to complete (10 ms typ. 50 ms max). If DS1624 does not acknowledge the command

protocol immediately following a configure register or write mem protocol, the DS1624 has not

finished writing. Restart the new command protocol until the DS1624 acknowledges.

3. If n is greater than eight, the last eight bytes are the only bytes saved in memory. If the starting

address is 00 and the incoming data is 00 11 22 33 44 55 66 77 88 99, the result will be mem00=88

mem01=99 mem02=22 mem03=33 mem04=44 mem05=55 mem06=66 mem07=77. The data wraps

around and overwrites itself.

4. The STOP condition causes the DS1624 to initiate the write to EEPROM sequence. If a START

condition comes instead of the STOP condition, the write is aborted. The data is not saved.

5. For reading, the address is incremented. If the starting address is 04h and 30 bytes of data are read

out, 21h is the final address read.

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DS1624

ABSOLUTE MAXIMUM RATINGS*

Voltage on Any Pin Relative to Ground............................................................................... -0.5V to +6.0V

Operating Temperature Range........................................................................................... -55°C to +125°C

Storage Temperature Range .............................................................................................. -55°C to +125°C

Soldering Temperature (reflow) ....................................................................................................... +260°C

Lead Temperature (soldering, 10s)................................................................................................... +300°C

* This is a stress rating only and functional operation of the device at these or any other conditions above

those indicated in the operation sections of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods of time may affect reliability.

RECOMMENDED DC OPERATING CONDITIONS

PARAMETER SYMBOL

Supply Voltage V_DD

MIN

TYP

MAX

5.5

UNITS

NOTES

2.7

5.0

DC ELECTRICAL CHARACTERISTICS

(-55°C to +125°C; V_DD=2.7V to 5.5V)

PARAMETER

SYMBOL CONDITION

MIN

TYP MAX UNITS NOTES

Thermometer Error

T_ERR

0°C to 70°C

±½

°C

-55°C to +0°C

and +70°C to

+125°C

See Typical Curve

Low Level Input

Voltage

High Level Input

Voltage

Pulse width of spikes

which must be

suppressed by the input

filter

V_IL

V_IH

t_SP

-0.5

0.7V_DD

0.3V_DD

V_DD+

0.5

Fast Mode

Low Level Output

Voltage

V_OL1

V_OL2

3 mA sink

current

6 mA sink

current

0.4

0.6

Input Current each I/O

I/O Capacitance

Active Supply Current

0.4<V_I/O

<0.9V_DD

-10

+10

µA

C_I/O

I_CC

1000

Temperature

Conversion

E²Write

Communica-

tion Only

400

100

µA

3, 4

Standby Supply Current

I_STBY

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DS1624

AC ELECTRICAL CHARACTERISTICS

PARAMETERS SYMBOL CONDITION

(-55°C to +125°C; V_DD=2.7V to 5.5V)

MIN

TYP MAX UNITS NOTES

Temperature

Conversion Time

NV Write Cycle

Time

T_TC

400

1000

t_WR

0°C to 70°C

EEPROM Writes

EEPROM Data

Retention

N_EEWR

t_EEDR

-20°C to +70°C

50k

writes

years

SLK Clock

Frequency

Bus Free Time

Between a

f_SCL

t_BUF

Fast Mode

Standard Mode

Fast Mode

1.3

4.7

400

100

kHz

µs

Standard Mode

STOP and START

Condition

Hold Time

(Repeated)

t_HD:STA

Fast Mode

Standard Mode

0.6

4.0

µs

START Condition

Low Period of

SCL Clock

High Period of

SCL Clock

t_LOW

t_HIGH

Fast Mode

Standard Mode

Fast Mode

Standard Mode

Fast Mode

1.3

4.7

0.6

4.0

0.6

4.7

µs

Setup Time for a

Repeated

t_SU:STA

Standard Mode

START Condition

Data Hold Time

t_HD:DAT

t_SU:DAT

t_R

Fast Mode

Standard Mode

Fast Mode

Standard Mode

Fast Mode

Standard Mode

100

0.9

µs

Data Setup Time

250

Rise Time of both

SDA and

20+0.1C_B

300

1000

SCL Signals

Fall Time of both

SDA and

SCL Signals

Setup Time for

STOP

t_F

t_SU:STO

C_b

Fast Mode

Standard Mode

20+0.1C_B

300

µs

Fast Mode

Standard Mode

0.6

4.0

Condition

Capacitive Load

for each Bus

Line

400

All values referred to V_IH=0.9 V_DDand V_IL=0.1 V_DD.

16 of 20

DS1624

AC ELECTRICAL CHARACTERISTICS

(-55°C to +125°C; V_DD=2.7V to 5.5V)

PARAMETER

Input Capacitance

SYMBOL

MIN

TYP

MAX

UNITS NOTES

C_I

NOTES:

1. All voltages are referenced to ground.

2. I/O pins of fast mode devices must not obstruct the SDA and SCL lines if V_DDis switched off.

3. I_CCspecified with SDA pin open.

4. I_CCspecified with V_CCat 5.0V and SDA, SCL = 5.0V, 0°C to 70°C.

5. After this period, the first clock pulse is generated.

6. The maximum t_HD:DAThas only to be met if the device does not stretch the LOW period (t_LOW) of the

SCL signal.

7. A fast mode device can be used in a standard mode system, but the requirement t_SU:DAT>250 ns must

then be met. This will automatically be the case if the device does not stretch the LOW period of the

SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next

data bit to the SDA line t_RMAX+t_SU:DAT= 1000+250 = 1250 ns before the SCL line is released.

8. C_b– total capacitance of one bus line in pF.

9. Writing to the nonvolatile memory should only take place in the 0°C to 70°C temperature range.

10. See Typical Curve for specification limits outside the 0°C to 70°C temperature range. Thermometer

error reflects sensor accuracy as tested during calibration.

17 of 20

DS1624

TIMING DIAGRAM

Note: The DS1624 does not delay the SDA line internally with respect to SCL for any length of time

TYPICAL PERFORMANCE CURVE

DS1624 DIGITAL THERMOMETER AND THERMOSTAT

TEMPERATURE READING ERROR

TEMPERATURE (deg. C)

18 of 20

DS1624

PACKAGE INFORMATION

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-“

in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing

pertains to the package regardless of RoHS status.

PACKAGE TYPE

8 PDIP

PACKAGE CODE

P8+4

OUTLINE NO.

21-0043

LAND PATTERN NO.

—

8 SO

W8+2

21-0262

90-0258

19 of 20

DS1624

REVISION HISTORY

REVISION

DATE

PAGES

DESCRIPTION

Updated ordering information, soldering, and package information

CHANGED

1, 2, 7, 14,

5/12

20 of 20

DS1624S相关文章

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DS1624S产品参数

型号:	DS1624S
是否无铅：	含铅
是否Rohs认证：	不符合
生命周期：	Active
IHS 制造商：	ROCHESTER ELECTRONICS LLC
Reach Compliance Code：	unknown
风险等级：	5.89
其他特性：	COMPLIANCE TO MIL-208
主体宽度：	5.28 mm
主体高度：	1.98 mm
主体长度或直径：	5.31 mm
外壳：	PLASTIC
JESD-609代码：	e0
安装特点：	SURFACE MOUNT
位数：	13
最大工作电流：	1 mA
最高工作温度：	125 °C
最低工作温度：	-55 °C
输出接口类型：	2-WIRE INTERFACE
封装形状/形式：	RECTANGULAR
传感器/换能器类型：	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
最大供电电压：	5.5 V
最小供电电压：	2.7 V
表面贴装：	YES
端子面层：	TIN LEAD
端接类型：	SOLDER

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