Datasheet

SN74AUCH16244
16-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES391E – MARCH 2002 – REVISED DECEMBER 2002
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information (continued)
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
terminal assignments
123456
A 1OE NC NC NC NC 2OE
B 1Y2 1Y1 GND GND 1A1 1A2
C 1Y4 1Y3 V
CC
V
CC
1A3 1A4
D 2Y2 2Y1 GND GND 2A1 2A2
E 2Y4 2Y3 2A3 2A4
F 3Y1 3Y2 3A2 3A1
G 3Y3 3Y4 GND GND 3A4 3A3
H 4Y1 4Y2 V
CC
V
CC
4A2 4A1
J 4Y3 4Y4 GND GND 4A4 4A3
K 4OE NC NC NC NC 3OE
NC – No internal connection
FUNCTION TABLE
(each 4-bit buffer)
INPUTS
OUTPUT
OE A
Y
L H H
L LL
H X Z
GQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
213465
K