器件名称: 74HC643
功能描述: Octal bus transceiver; 3-state; true/inverting
文件大小: 52.67KB 共6页
简 介:INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT643 Octal bus transceiver; 3-state; true/inverting
Product specication File under Integrated Circuits, IC06 December 1990
Philips Semiconductors
Product specication
Octal bus transceiver; 3-state; true/inverting
FEATURES Octal bidirectional bus interface True and inverting 3-state outputs Output capability: bus driver ICC category: MSI GENERAL DESCRIPTION
74HC/HCT643
The 74HC/HCT643 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT643 are octal transceivers featuring true and inverting 3-state bus compatible outputs in both send and receive directions. The “643” features an output enable (OE) input for easy cascading and a send/receive (DIR) for direction control. OE controls the outputs so that the buses are effectively isolated.
QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay An to Bn; inverting Bn to An; true input capacitance input/output capacitance power dissipation capacitance per transceiver notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 7 8 3.5 10 42 8 11 3.5 10 44 ns ns pF pF pF HCT UNIT
CI CI/O CPD Notes
1. CPD is us……