Datasheet > M74HCT643

M74HCT643

更新时间： 2024-11-22 23:01:27

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
11页	267K
描述
OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON INVERTING

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中文翻译

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数据手册

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M74HCT643 数据手册

M54/74HCT245/640/643

OCTAL BUS TRANSCEIVER (3-STATE): HCT245 NON INVERTING

HCT640 INVERTING, HCT643 INVERTING/NON INVERTING

HIGH SPEED

_PD= 10 ns (TYP.) at V_CC= 5V

LOW POWER DISSIPATION

I_CC= 4 µA (MAX.) at T_A= 25 ^oC

COMPATIBLE WITH TTL OUTPUTS

B1R

(Plastic Package)

F1R

_IH= 2V (MIN.) V_IL= 0.8V (MAX.)

(Ceramic Package)

OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

SYMMETRICAL OUTPUT IMPEDANCE

|I_OH| = I_OL= 6 mA (MIN)

BALANCED PROPAGATION DELAYS

t_PLH= t_PHL

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS245/640/643

M1R

C1R

(Micro Package)

(Chip Carrier)

ORDER CODES :

M54HCTXXXF1R

M74HCTXXXM1R

M74HCTXXXB1R

M74HCTXXXC1R

DESCRIPTION

The M54/74HCT245, HCT640 and HCT643 utilise

silicon gate C²MOS technology to achive operating

speeds eqivalent to LSTTL devices.

characteristics that are fully compatible with 54/74

LSTTL logic families. M54/74HCT devices are

designed to directly interface HSC²MOS systems

with TTL and NMOS components. They are also

plug in replacements for LSTTL devices giving a

reduction of power consumption.

IT IS PROHIBITED TO APPLY A SIGNAL TO A

BUS TERMINAL WHEN IT IS IN OUTPUT MODE

AND WHEN A BUS THERMINAL IS FLOATING

(HIGH IMPEDANCE STATE), IT IS REQUESTED

TO FIX THE INPUT LEVEL BY MEANS OF

EXTERNAL PULL DOWN OR PULL UP

RESISTOR.

Along with the low power dissipation and high noise

immunity of standad CMOS integrated circuit, it

possesses the capability to drive 15 LSTTL loads.

These IC’s are intended for two-way asynchronous

communication between data buses, and the

direction of data trasmission is determined by DIR

input. The enable input (G) can be used to disable

the device so that the buses are effectively isolated.

All input are equipped with protection circuits

against static discharge and transient discharge.

These integrated circuits have input and output

PIN CONNECTION (top view)

HCT245

HCT640

HCT643

October 1993

1/11

12 3 4 5 6 7...11

中文翻译

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与M74HCT643相关器件

型号	品牌	获取价格	描述	数据表
M74HCT643-1DWP	MITSUBISHI	获取价格	Bus Driver/Transceiver, 1-Func, 8-Bit, Complementary Output, CMOS, PDSO20
M74HCT643-1P	MITSUBISHI	获取价格	Bus Transceiver, HCT Series, 1-Func, 8-Bit, True Output, CMOS, PDIP20, PLASTIC, DIP-20
M74HCT643B1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON
M74HCT643C1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON
M74HCT643F1	STMICROELECTRONICS	获取价格	HCT SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, CDIP20, FRIT SEALED, CERAMIC, DIP-20
M74HCT643M1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER3-STATE: HCT245 NON INVERTING HCT640 INVERTING, HCT643 INVERTING/NON
M74HCT646	STMICROELECTRONICS	获取价格	HCT646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE HCT648 OCTAL BUS TRANSCEIVER/REGISTER 3-STAT
M74HCT646B1N	STMICROELECTRONICS	获取价格	暂无描述
M74HCT646B1R	STMICROELECTRONICS	获取价格	HCT646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE HCT648 OCTAL BUS TRANSCEIVER/REGISTER 3-STAT
M74HCT646M1R	STMICROELECTRONICS	获取价格	HCT646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE HCT648 OCTAL BUS TRANSCEIVER/REGISTER 3-STAT

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