Datasheet
SCES124L − DECEMBER 1997 − REVISED APRIL 2005
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information (continued)
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE
A
OUTPUT
Y
L H H
L LL
H X Z
logic diagram (positive logic)
2A 2Y
2OE
1A 1Y
1OE
1
2
4
5
3
6
4A 4Y
4OE
3A 3Y
3OE
10
9
13
12
8
11
Pin numbers shown are for the D, DB, DGV, J, N, NS, PW, RGY, and W packages.