MC145018各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

Freescale Semiconductor, Inc.

Order this document

by MC145018/D

SEMICONDUCTOR TECHNICAL DATA

Low–Power CMOS

16

1

P SUFFIX

PLASTIC DIP

CASE 648–08

The MC145018, when used with an ionization chamber and a small number of

external components, will detect smoke. When smoke is sensed, an alarm is sounded

via an external piezoelectric transducer and internal drivers. This circuit is designed to

operate in smoke detector systems that comply with UL217 and UL268 specifications.

ORDERING INFORMATION

MC145018P PLASTIC DIP

•

Ionization Type with On–Chip FET Input Comparator

Piezoelectric Horn Driver

Guard Outputs on Both Sides of Detect Input

Input–Protection Diodes on the Detect Input

PIN ASSIGNMENT

(16 PIN DIP)

Low–Battery Trip Point, Internally Set, can be Altered Via External Resistor

Detect Threshold, Internally Set, can be Altered Via External Resistor

Pulse Testing for Low Battery Uses LED for Battery Loading

Comparator Output for Detect

Detect

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Guard Hi–Z

Comp. Out

Detect Input

Guard Lo–Z

I/O

Low V Set

Internal Reverse Battery Protection

Strobe Output for External Trim Resistors

Strobe Out

LED

Sensitivity Set

Osc Capacitor

Silver

I/O Pin Allows Up to 40 Units to be Connected for Common Signaling

Supports NFPA 72, ANSi 53.41, and ISO 8201

Audible Emergency Evacuation Signals

V

DD

Timing

Resistor

Brass

•

Power–On Reset Places IC in Standby Mode

V

SS

Feedback

MAXIMUM RATINGS* (Voltages referenced to V

)

SS

Rating

Symbol

Value

Unit

V

DC Supply Voltage

Input Voltage, All Inputs Except Pin 8

V

DD

0.5 to + 15

V

in

0.25 to V + 0.25

V

DD

DC Current Drain per Input Pin, Except Pin 15 = 1 mA

DC Current Drain per Output Pin

Operating Temperature Range

Storage Temperature Range

I

10

mA

°C

s

I

30

T

A

10 to + 60

55 to + 125

5.0

T

stg

RB

Reverse Battery Time

t

* Maximum Ratings are those values beyond which damage to the device may occur.

This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal

precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation

it is recommended that V and V be constrained to the range V

(V or V

)

V

DD

.

in

out

SS

in

out

REV 3

Motorola Sensor Device Data

1

For More Information On This Product,

Go to: www.freescale.com

Motorola, Inc. 2000

Freescale Semiconductor, Inc.

RECOMMENDED OPERATING CONDITIONS (Voltages referenced to V

)

SS

Parameter

Symbol

Value

9.0

Unit

V

Supply Voltage

Timing Capacitor

Timing Resistor

V

DD

—

0.1

µF

8.2

MΩ

mA

Battery Load (Resistor or LED)

10

ELECTRICAL CHARACTERISTICS (Voltages referenced to V , TA = 25°C)

SS

V

DD

Characteristic

Symbol

V

Min

Typ

Max

Unit

V

dc

Operating Voltage

Output Voltage

V

DD

V

OH

—

6.0

—

12

V

Piezoelectric Horn Drivers (I

=

16 mA)

7.2

9.0

7.2

9.0

6.3

8.5

—

8.8

—

0.9

0.5

OH

Comparators (I

=

30 µA)

OH

Piezoelectric Horn Drivers (I = + 16 mA)

V

OL

Comparators (I = +30 µA)

—

0.1

OL

Output Voltage — LED Driver, I = 10 mA

7.2

—

3.0

OL

Output Impedance, Active Guard

Pin 14

Pin 16

Lo–Z

Hi–Z

9.0

—

10

1000

kΩ

µA

Operating Current (R

= 8.2 MΩ)

I

9.0

12.0

—

5.0

—

9.0

12.0

bias

DD

Input Current — Detect (40% R.H.)

Input Current, Pin 8

I

in

I

in

I

in

9.0

—

1.0

0.1

6.0

pA

µA

pA

Input Current @ 50°C, Pin 15

Internal Set Voltage

Low Battery

Sensitivity

V

9.0

—

7.2

47

—

50

7.8

53

V

low

%V

DD

set

Hysteresis

v

9.0

75

100

150

mV

hys

Offset Voltage (measured at Vin = VDD/2)

Active Guard

Detect Comparator

V

OS

9.0

—

100

50

Input Voltage Range, Pin 8

Input Capacitance

V

—

VSS 10

—

5.0

—

VDD + 10

—

V

pF

V

in

C

—

in

Common Mode Voltage Range, Pin 15

V

cm

0.6

VDD

2

I/O Current, Pin 2

Input, V = VDD

2

I

—

25

4.0

—

100

16

µA

mA

IH

Output, V = VDD

2

I

OH

# Data labelled “Typ’’ is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

2

Motorola Sensor Device Data

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

TIMING PARAMETERS (C = 0.1 µF, R

= 8.2 MΩ, V = 9.0 V, T = 25°C, See Figure 6)

bias

DD

A

Characteristics

Symbol

Min

Max

Units

Oscillator Period

No Smoke

Smoke

t

CI

1.46

37.5

1.85

45.8

s

ms

Oscillator Rise Time

t

r

10.1

12.3

ms

Horn Output

(During Smoke)

On Time

Off Time

PW

450

550

ms

on

off

LED Output

Pulses

Between

On Time

t

35.0

10.1

44.5

12.3

s

ms

LED

PW

on

Horn Output

(During Low Battery)

Pulses

On Time

Between

t

10.1

35.0

12.3

44.5

ms

s

on

off

TO OTHER UNITS

V

DD

V

DD

I/O

FEEDBACK

2

8

45 K

LOW BATTERY

COMPARATOR

11

10

SILVER

BRASS

+

–

3

1

LOW V SET

DETECT

COMP. OUT

ALARM

LOGIC

280 K

DETECT

COMPARATOR

13

SENSITIVITY

SET

+

–

POWER–ON

RESET

325 K

15

DETECT

INPUT

GUARD

AMP

4

LO–Z

V

DD

STROBE OUT

HI–Z

16

OSC

AND

TIMING

5

LED

+

–

14

V

DD

= PIN 6

V

SS

= PIN 9

12

7

V

DD

Figure 1. Block Diagram

Motorola Sensor Device Data

3

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

100.0

10.0

V

DD

= 9.0 Vdc

T = 25°C

A

T = 25°C

A

V

DD

= 9.0 Vdc or 7.2 Vdc

1.0

0.1

V

= 7.2 Vdc

DD

1.0

0.1

P–CH SOURCE

AND N–CH

SINK CURRENT

0.01

0

1

2

3

4

5

6

7

8

9

10

0

1

2

3

4

5

6

7

8

9

10

V , DRAIN TO SOURCE VOLTAGE (Vdc)

DS

V , DRAIN TO SOURCE VOLTAGE (Vdc)

DS

Figure 2. Typical LED Output

I–V Characteristic

Figure 3. Typical Comparator Output

I–V Characteristic

1000.0

100.0

1000.0

100.0

T = 25°C

A

T = 25°C

A

V

DD

= 9.0 Vdc

V

DD

= 9.0 Vdc

V

DD

= 7.2 Vdc

V

DD

= 7.2 Vdc

10.0

1.0

10.0

1.0

P–CH SOURCE CURRENT

N–CH SINK CURRENT

0

1

2

3

4

5

6

7

8

9

10

0

1

2

3

4

5

6

7

8

9

10

V , DRAIN TO SOURCE VOLTAGE (Vdc)

DS

V , DRAIN TO SOURCE VOLTAGE (Vdc)

DS

Figure 4. Typical P Horn Driver Output

I–V Characteristic

4

Motorola Sensor Device Data

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

DEVICE OPERATION

TIMING

The internal oscillator of the MC145018 operates with a

draw excessive current from a sending unit at a higher volt-

age. The I/O is disabled for three oscillator cycles after power

up, to eliminate false alarming of remote units when the bat-

tery is changed.

period of 1.65 seconds during no–smoke conditions. Each

1.65 seconds, internal power is applied to the entire IC and a

check is made for smoke, except during LED pulse, Low Bat-

tery Alarm Chirp, or Horn Modulation (in smoke). Every 24

clock cycles a check is made for low battery by comparing

V_DDto an internal zener voltage. Since very small currents

are used in the oscillator, the oscillator capacitor should be of

a low leakage type.

SENSITIVITY/LOW BATTERY THRESHOLDS

Both the sensitivity threshold and the low battery voltage

levels are set internally by a common voltage divider (see

Figure 1) connected between V_DDand V_SS. These voltages

can be altered by external resistors connected from pins 3 or

13 to either V_DDor V_SS. There will be a slight interaction here

due to the common voltage divider network. The sensitivity

threshold can also be set by adjusting the smoke chamber

ionization source.

DETECT CIRCUITRY

If smoke is detected, the oscillator period becomes

41.67 ms and the piezoelectric horn oscillator circuit is

enabled. The horn output is modulated 500 ms on, 500 ms

off. During the off time, smoke is again checked and will

inhibit further horn output if no smoke is sensed. During local

smoke conditions the low battery alarm is inhibited, but the

LED pulses at a 1.0 Hz rate. In remote smoke, the LED is

inhibited as well.

An active guard is provided on both pins adjacent to the

detect input. The voltage at these pins will be within 100 mV

of the input signal. This will keep surface leakage currents to

a minimum and provide a method of measuring the input volt-

age without loading the ionization chamber. The active guard

op amp is not power strobed and thus gives constant protec-

tion from surface leakage currents. Pin 15 (the Detect input)

has internal diode protection against static damage.

TEST MODE

Since the internal op amps and comparators are power

strobed, adjustments for sensitivity or low battery level could

be difficult and/or time–consuming. By forcing Pin 12 to V_SS

,

the power strobing is bypassed and the output, Pin 1,

constantly shows smoke/no smoke. Pin 1 = V_DDfor smoke.

In this mode and during the 10 ms power strobe, chip current

rises to approximately 50 µA.

LED PULSE

The 9–volt battery level is checked every 40 seconds dur-

ing the LED pulse. The battery is loaded via a 10 mA pulse

for 11.6 ms. If the LED is not used, it should be replaced with

an equivalent resistor such that the battery loading remains

at 10 mA.

INTERCONNECT

The I/O (Pin 2), in combination with V_SS, is used to inter-

connect up to 40 remote units for common signaling. A Local

Smoke condition activates a current limited output driver,

thereby signaling Remote Smoke to interconnected units. A

small current sink improves noise immunity during non–

smoke conditions. Remote units at lower voltages do not

HYSTERESIS

When smoke is detected, the resistor/divider network that

sets sensitivity is altered to increase sensitivity. This yields

approximately 100 mV of hysteresis and reduces false

triggering.

1 M

TEST

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

MC145018

TO

OTHER

UNITS

330 Ω

0.1 µF

8.2 MΩ

+

0.1 µF

9 V

*NOTE: Component values may

change depending on type of

piezoelectric horn used.

0.001 µF

220 kΩ*

1.5 MΩ*

Figure 5. Typical Application as Ionization Smoke Detector

Motorola Sensor Device Data

5

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

1

2

3

4

5

6

7

8

9

23 24

1

6

12

18

24

OSC

PIN 12

SMOKE – N

– Y

SMOKE – N

– Y

NO SMOKE, LOW BATTERY

NO SMK

SMOKE

NO SMK

NO LOW BAT

LATCH ALARM CONDITION

LOW BAT – Y

– N

HYST

PIN 13

LOW BAT – Y

– N

(

100 mV LEVEL SHIFT)

HORN – ON

– OFF

HORN – ON

– OFF

LOW BATTERY CHIRP

(NOTE 1)

NFPA MOD

LED – OFF

– ON

LED – OFF

– ON

24 CLOCKS

Figure 6. MC145018 Timing Diagram

NOTES:

1. Horn modulation is self–completing. When going from smoke to no smoke, the alarm condition will terminate only when horn is off.

2. Comparators are strobed once per cycle (1.65 sec for no smoke, 40 msec for smoke).

3. For timing under remote conditions, refer to MC14468 data sheet.

NFPA72: TEMPORAL HORN

MODULATION PATTERN

0.5 SEC

1.5 SEC

83 msec

167 msec

TRADITIONAL 4/6 HORN

MODULATION PATTERN

Figure 7. Horn Modulation

6

Motorola Sensor Device Data

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

PACKAGE DIMENSIONS

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION L TO CENTER OF LEADS WHEN

FORMED PARALLEL.

4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.

5. ROUNDED CORNERS OPTIONAL.

–A–

INCHES

DIM MIN MAX

0.770 18.80

MILLIMETERS

16

1

9

8

MIN

MAX

19.55

6.85

4.44

0.53

1.77

A

B

C

D

F

0.740

0.250

0.145

0.015

0.040

B

S

0.270

0.175

0.021

0.70

6.35

3.69

0.39

1.02

F

G

H

J

K

L

M

S

0.100 BSC

0.050 BSC

2.54 BSC

1.27 BSC

0.21

2.80

7.50

0

C

L

0.008

0.015

0.130

0.305

10

0.38

3.30

7.74

10

0.110

0.295

0

SEATING

PLANE

–T–

0.020

0.040

0.51

1.01

K

M

H

J

STYLE 1:

STYLE 2:

G

PIN 1. CATHODE

2. CATHODE

3. CATHODE

4. CATHODE

5. CATHODE

6. CATHODE

7. CATHODE

8. CATHODE

9. ANODE

PIN 1. COMMON DRAIN

2. COMMON DRAIN

3. COMMON DRAIN

4. COMMON DRAIN

5. COMMON DRAIN

6. COMMON DRAIN

7. COMMON DRAIN

8. COMMON DRAIN

9. GATE

D 16 PL

M

0.25 (0.010)

T A

10. ANODE

11. ANODE

12. ANODE

13. ANODE

14. ANODE

15. ANODE

16. ANODE

10. SOURCE

11. GATE

12. SOURCE

13. GATE

14. SOURCE

15. GATE

16. SOURCE

CASE 648–08

ISSUE R

Motorola Sensor Device Data

7

For More Information On This Product,

Go to: www.freescale.com

Freescale Semiconductor, Inc.

Mfax is a trademark of Motorola, Inc.

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or

guaranteeregardingthesuitabilityofitsproductsforanyparticularpurpose, nordoesMotorolaassumeanyliabilityarisingoutoftheapplication

or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.

“Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual

performancemay vary over time. All operating parameters, including“Typicals” must be validated for each customer applicationbycustomer’s

technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed,

intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support

or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death

may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and

hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses,

and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or

unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and

are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

How to reach us:

USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217.

1–303–675–2140 or 1–800–441–2447

JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3–20–1, Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan.

81–3–3440–3569

ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po,

N.T., Hong Kong. 852–26668334

Customer Focus Center: 1–800–521–6274

Mfax : RMFAX0@email.sps.mot.com

Motorola Fax Back System

– TOUCHTONE 1–602–244–6609

– US & Canada ONLY 1–800–774–1848

– http://sps.motorola.com/mfax/

HOME PAGE: http://motorola.com/sps/

8

Motorola Sensor Device Data

For More Information On This Product,

Go to: www.freescale.com

◊

MC145018/D

电子百科

产品导航

产品型号MC145018的Datasheet PDF文件预览

MC145018相关产品..

MC145018相关文章