HD74ALVCH16245 Datasheet, PDF (1/9 Pages) Hitachi Semiconductor – 16-bit Bus Transceivers with 3-state Outputs

HD74ALVCH16245
6-bit Bus Transceivers with 3-state Outputs
REJ03D0049-0500Z
(Previous ADE-205-134C(Z))
Rev.5.00
Oct.02.2003
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
• V_CC = 2.3 V to 3.6 V
• Typical V_OL ground bounce < 0.8 V (@V_CC = 3.3 V, Ta = 25°C)
• Typical V_OH undershoot > 2.0 V (@V_CC = 3.3 V, Ta = 25°C)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
Function Table
Inputs
OE
DIR
L
L
L
H
H
X
H : High level
L : Low level
X : Immaterial
Operation
B data to A bus
A data to B bus
Isolation
Rev.5.00, Oct.02.2003, page 1 of 8