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M74HCT245B1R PDF预览

M74HCT245B1R

更新时间: 2024-11-05 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

M74HCT245B1R 数据手册

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M54/74HCT245/640/643  
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 VCC = 5V  
t
.
.
.
.
.
.
LOW POWER DISSIPATION  
ICC = 4 µA (MAX.) at TA = 25 oC  
COMPATIBLE WITH TTL OUTPUTS  
B1R  
(Plastic Package)  
F1R  
V
IH = 2V (MIN.) VIL = 0.8V (MAX.)  
(Ceramic Package)  
OUTPUT DRIVE CAPABILITY  
15 LSTTL LOADS  
SYMMETRICAL OUTPUT IMPEDANCE  
|IOH| = IOL = 6 mA (MIN)  
BALANCED PROPAGATION DELAYS  
tPLH = tPHL  
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  

M74HCT245B1R 替代型号

型号 品牌 替代类型 描述 数据表
MC74HCT245AN ONSEMI

完全替代

Octal 3-State Noninverting Bus Transceiver with LSTTL Compatible Inputs
CD54HCT245F3A TI

类似代替

High-Speed CMOS Logic Octal-Bus Transceiver, Three-State, Non-Inverting

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