器件名称:
DM74ALS640
功能描述:
Inverting Octal Bus Transceiver
文件大小:
48.06KB 共4页
简 介:
DM74ALS640A Inverting Octal Bus Transceiver August 1985 Revised February 2000 DM74ALS640A Inverting Octal Bus Transceiver General Description This inverting octal bus transceiver is designed for asynchronous two-way communication between data busses. This device transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction control (DIR) input. The enable input (G) can be used to disable the device so the busses are effectively isolated. Features s Advanced Oxide-isolated Ion-implanted Schottky TTL process s Switching performance is guaranteed over full temperature and VCC supply range s Switching performance specified at 50 pF s PNP input design reduces input loading Ordering Code: Order Number DM74ALS640AWM DM74ALS640AN Package Number M20B N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Logic Diagram Function Table Control Inputs G L L H L = LOW Logic Level H = HIGH Logic Level X = Either LOW or HIGH Logic Level Operation DIR L H X B Data to A Bus A Data to B Bus Isolation 2000 Fairchild Semiconductor Corporation DS008640 www.fairchildsemi.com DM74ALS640A Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Control Inputs I/O ports Operating Free Air Tempe……
