HC244供应商报价哪里找芯片批发报价原理和应用中文资料-中国IC网-芯三七

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产品型号HC244的概述

芯片HC244的概述 HC244是一个常用的高性能双向总线收发器。这款芯片的出现使得在数字电路中进行数据传输变得更加高效。HC244属于74系列逻辑芯片，特别是在需要进行数据传递和存储的应用中，其表现优异。HC244主要用于GPIO接口，缓冲数据以及增加总线的可扩展性，广泛应用于计算机工程、嵌入式系统、工业控制等领域。 HC244的设计基于CMOS技术，这种技术使其具备了较低的功耗和高效的逻辑电平转换能力。同时，HC244的工作电压范围广，通常在2V至6V之间，这使其在各种工作环境中都能稳定运行。此外，其在高速操作方面的能力也使其适合于快速数据传输应用。 HC244的详细参数 HC244的数据手册中列出了许多关键参数，这些参数是设计和选择适合的元件时必须考虑的。以下是一些核心参数的详细说明： 1. 工作电压范围：2V至6V 2. 输入电流：最大为 ±1μA 3. 输出电流：最大为 ±6...

产品型号HC244的Datasheet PDF文件预览

SL74HC244

Octal 3-State Noninverting

Buffer/Line Driver/Line Receiver

High-Performance Silicon-Gate CMOS

The SL74HC244 is identical in pinout to the LS/ALS244. The device

inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LS/ALSTTL outputs.

This octal noninverting buffer/line driver/line receiver is designed

to be used with 3-state memory address drivers, clock drivers, and

other bus-oriented systems. The device has noninverting outputs and

two active-low output enables.

ORDERING INFORMATION

SL74HC244N Plastic

SL74HC244D SOIC

T_A= -55° to 125° C for all packages

Outputs Directly Interface to CMOS, NMOS, and TTL

Operating Voltage Range: 2.0 to 6.0 V

Low Input Current: 1.0 mA

High Noise Immunity Characteristic of CMOS Devices

PIN ASSIGNMENT

LOGIC DIAGRAM

FUNCTION TABLE

Inputs

Enable A,

Outputs

YA,YB

A,B

Enable B

PIN 20=V_CC

PIN 10 = GND

X=don’ t care

Z = high impedance

System Logic

SLS

Semiconductor

IN74HC244

MAXIMUM RATINGS^*

Symbol

Parameter

Value

-0.5 to +7.0

-1.5 to V_CC+1.5

-0.5 to V_CC+0.5

±20

Unit

V_CC

DC Supply Voltage (Referenced to GND)

DC Input Voltage (Referenced to GND)

DC Output Voltage (Referenced to GND)

DC Input Current, per Pin

V_OUT

I_IN

I_OUT

I_CC

DC Output Current, per Pin

±35

DC Supply Current, V_CCand GND Pins

±75

P_D

Power Dissipation in Still Air, Plastic DIP+

SOIC Package+

750

500

Tstg

T_L

Storage Temperature

-65 to +150

260

°C

Lead Temperature, 1 mm from Case for 10 Seconds

(Plastic DIP or SOIC Package)

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

Functional operation should be restricted to the Recommended Operating Conditions.

+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C

SOIC Package: : - 7 mW/°C from 65° to 125°C

RECOMMENDED OPERATING CONDITIONS

Symbol

V_CC

Parameter

Min

2.0

Max

6.0

Unit

DC Supply Voltage (Referenced to GND)

DC Input Voltage, Output Voltage (Referenced to GND)

Operating Temperature, All Package Types

V , V_OUT

V_CC

T_A

-55

+125

°C

t_r, t_f

Input Rise and Fall Time (Figure 1)

V_CC=2.0 V

V_CC=4.5 V

V_CC=6.0 V

1000

500

400

This device contains protection circuitry to guard against damage due to high static voltages or electric

fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated

voltages to this high-impedance circuit. For proper operation, V and V_OUTshould be constrained to the range

GND£(V or V_OUT)£V_CC.

Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V ).

Unused outputs must be left open.

System Logic

SLS

Semiconductor

SL74HC244

DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND)

V_CC

Guaranteed Limit

25 °C £85 £125

Symbol

Parameter

Test Conditions

Unit

-55°C

°C

Minimum High-Level

Input Voltage

V_OUT= V_CC-0.1 V

êI_OUTê£ 20 mA

2.0

4.5

6.0

1.5

3.15

4.2

1.5

3.15

4.2

1.5

3.15

4.2

Maximum Low -Level

Input Voltage

V_OUT=0.1 V

êI_OUTê £ 20 mA

2.0

4.5

6.0

0.5

1.35

1.8

0.5

1.35

1.8

0.5

1.35

1.8

V_OH

Minimum High-Level

Output Voltage

V =V

êI_OUTê £ 20 mA

2.0

4.5

6.0

1.9

4.4

5.9

1.9

4.4

5.9

1.9

4.4

5.9

V =V

êI_OUTê £ 6.0 mA

êI_OUTê £ 7.8 mA

4.5

6.0

3.98

5.48

3.84

5.34

3.7

5.2

V_OL

Maximum Low-Level

Output Voltage

V = V

êI_OUTê £ 20 mA

2.0

4.5

6.0

0.1

V = V

êI_OUTê £ 6.0 mA

êI_OUTê £ 7.8 mA

4.5

6.0

0.26

0.33

0.4

I_IN

Maximum Input

Leakage Current

V =V_CCor GND

6.0

±0.1

±1.0

I_OZ

Maximum Three-State Output in High-Impedance

6.0

±0.5

±5.0

±10.0

Leakage Current

State

V = V or V

V_OUT=V_CCor GND

I_CC

Maximum Quiescent

Supply Current

(per Package)

V =V_CCor GND

I_OUT=0mA

6.0

4.0

160

System Logic

Semiconductor

SLS

IN74HC244

AC ELECTRICAL CHARACTERISTICS(C_L=50pF,Input t_r=t_f=6.0 ns)

V_CC

Guaranteed Limit

Symbol

Parameter

25 °C to £85°C

-55°C

£125°C

Unit

t_PLH, t_PHLMaximum Propagation Delay, A to YA or B to YB

(Figures 1 and 3)

2.0

4.5

6.0

115

135

t_PLZ, t_PHZMaximum Propagation Delay , Output Enable to

YA or YB (Figures 2 and 4)

2.0

4.5

6.0

110

140

165

t_PZL, t_PZHMaximum Propagation Delay , Output Enable to

YA or YB (Figures 2 and 4)

2.0

4.5

6.0

110

140

165

t_TLH, t_THLMaximum Output Transition Time, Any Output

(Figures 1 and 3)

2.0

4.5

6.0

C_IN

Maximum Input Capacitance

C_OUT

Maximum Three-State Output Capacitance

(Output in High-Impedance State)

Power Dissipation Capacitance (Per Buffer)

Typical @25°C,V_CC=5.0 V

C_PD

Used to determine the no-load dynamic power

consumption:

P_D=C_PDV_CC²f+I_CCV_CC

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Figure 3. Test Circuit

Figure 4. Test Circuit

System Logic

Semiconductor

SLS

SL74HC244

EXPANDED LOGIC DIAGRAM

(1/8 of the Device)

System Logic

Semiconductor

SLS

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