器件名称:
DM74ALS645A
功能描述:
Octal Bus Transceivers
文件大小:
47.84KB 共4页
简 介:
DM74ALS645A Octal Bus Transceivers March 1987 Revised February 2000 DM74ALS645A Octal Bus Transceivers General Description These octal bus transceivers are designed for asynchronous two-way communication between data busses. These devices transmit 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 DM74ALS645AWM DM74ALS645AN 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 DIR L H X B Data to A Bus A Data to B Bus Isolation Operation L = LOW Logic Level H = HIGH Logic Level X = Either LOW or HIGH Logic Level 2000 Fairchild Semiconductor Corporation DS009304 www.fairchildsemi.com DM74ALS645A Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage; Control Inputs I/O Ports Operating Free Air Temperature Range Storage Tem……
