器件名称:
74HCT643
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……
