Datasheet > M74HC643B1R

M74HC643B1R

更新时间： 2024-11-28 22:15:15

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		总线收发器
页数	文件大小	规格书
11页	268K
描述
OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON INVERTING

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中文翻译

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数据手册
替代型号

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M74HC643B1R 数据手册

M54/74HC245/640/643

OCTAL BUS TRANSCEIVER (3-STATE): HC245 NON INVERTING

HC640 INVERTING, HC643 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

HIGH NOISE IMMUNITY

_NIH= V_INL= 28 % V_CC(MIN.)

OUTPUT DRIVE CAPABILITY

15 LSTTL LOADS

SYMMETRICAL OUTPUT IMPEDANCE

|I_OH| = I_OL= 6 mA (MIN)

BALANCED PROPAGATION DELAYS

t_PLH= t_PHL

WIDE OPERATING VOLTAGE RANGE

V_CC(OPR) = 2 V TO 6 V

B1R

F1R

(Plastic Package)

(Ceramic Package)

M1R

C1R

(Micro Package)

(Chip Carrier)

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS245/640/643

ORDER CODES :

M54HCXXXF1R

M74HCXXXM1R

M74HCXXXB1R

M74HCXXXC1R

DESCRIPTION

The M54/74HC245, HC640 and HC643 utilise

silicon gate C2MOS technology to achive operating

speeds equivalent to LSTTL devices.

All input are equipped with protection circuits

against staticdischarge and transient discharge and

transient excess voltage.

Along with the low power dissipation and high noise

immunity of standards C²MOS 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.

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.

PIN CONNECTION (top view)

HC245

HC640

HC643

October 1993

1/11

12 3 4 5 6 7...11

中文翻译

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M74HC643B1R 替代型号

型号	品牌	替代类型	描述	数据表
SN74HC645N	TI	功能相似	OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

与M74HC643B1R相关器件

型号	品牌	获取价格	描述	数据表
M74HC643C1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON IN
M74HC643DWP	MITSUBISHI	获取价格	Bus Driver/Transceiver, 1-Func, 8-Bit, Complementary Output, CMOS, PDSO20
M74HC643F1	STMICROELECTRONICS	获取价格	暂无描述
M74HC643F1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON IN
M74HC643FP	MITSUBISHI	获取价格	Bus Driver/Transceiver, 1-Func, 8-Bit, Complementary Output, CMOS, PDSO20
M74HC643M1R	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING, HC643 INVERTING/NON IN
M74HC643P	MITSUBISHI	获取价格	Bus Driver/Transceiver, 1-Func, 8-Bit, Complementary Output, CMOS, PDIP20
M74HC643RM13TR	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS INVERTING/NON INVERTING
M74HC643TTR	STMICROELECTRONICS	获取价格	OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS INVERTING/NON INVERTING
M74HC646	STMICROELECTRONICS	获取价格	HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE, INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-

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