HD74ALVCH16245

HD74ALVCH16245 16-bit Bus Transceivers with 3-state Outputs ADE-205-134C (Z) 4th. Edition December 1999 Description The HD74ALVCH16245 is designed for asynchronous communication between data buses. The control function implementation minimizes external timing requirements. This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allow data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction control (DIR) input. The output enable (OE ) input can be used to disable the device so that the buses are effectively isolated. Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Features VCC = 2.3 V to 3.6 V Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) Bus hold on data inputs eliminates the need for external pullup / pulldown resistors Function Table Inputs OE L L H H : High level L : Low level X : Immaterial DIR L H X B data to A bus A data to B bus Isolation Operation HD74ALVCH16245 Pin Arrangement 1DIR 1 1B1 2 1B2 3 GND 4 1B3 5 1B4 6 VCC 7 1B5 8 1B6 9 GND 10 1B7 11 1B8 12 2B1 13 2B2 14 GND 15 2B3 16 2B4 17 VCC 18 2B5 19 2B6 20 GND 21 2B7 22 2B8 23 2DIR 24 48 1OE 47 1A1 46 1A2 45 GND 44 1A3 43 1A4 42 VCC 41 1A5 40 1A6 39 GND 38 1A7 37 1A8 36 2A1 35 2A2 34 GND 33 2A3 32 2A4 31 VCC 30 2A5 29 2A6 28 GND 27 2A7 26 2A8 25 2OE (Top view) 2 HD74ALVCH16245 Absolute Ma...