器件名称:
74HC648
功能描述:
Octal bus transceiver/register; 3-state; inverting
文件大小:
95.8KB 共12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/HCT648 Octal bus transceiver/register; 3-state; inverting Product specication File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specication Octal bus transceiver/register; 3-state; inverting FEATURES Independent register for A and B buses Multiplexed real-time and stored data Output capability: bus driver ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT648 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/HCT648 consist of bus transceiver circuits with 3-state inverting outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the internal registers. Data on the “A” or “B” QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns 74HC/HCT648 bus will be clocked into the registers as the appropriate clock (CPAB and CPBA) goes to a HIGH logic level. Output enable (OE) and direction (DIR) inputs are provided to control the transceiver function. In the transceiver mode, data present at the high-impedance port may be stored in either the “A” or “B” register, or in both. The select source inputs (SAB and SBA) can multiplex s……
