Datasheet
SCBS746B − JULY 2000 - REVISED OCTOBER 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information (continued)
When V
CC
is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to GND through a pulldown
resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.
These devices are fully specified for hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE A
OUTPUT
Y
H H H
H LL
L X Z
logic diagram (positive logic)
1
1OE
2
1A 1Y
3
4
2OE
5
2A 2Y
6
10
3OE
9
3A 3Y
8
13
4OE
12
4A 4Y
11
Pin numbers shown are for the D, DB, DGV, J, NS, PW, and W packages.