Datasheet

SN54ABT162500, SN74ABT162500
18-BIT UNIVERSAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS242E – JUNE 1992 – REVISED FEBRUARY 1999
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
When V
CC
is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 2.1 V, OE
should be tied to V
CC
through a pullup resistor
and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by
the current-sinking/current-sourcing capability of the driver.
The SN54ABT162500 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT162500 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
†
INPUTS
OUTPUT
OEAB LEAB CLKAB A
B
L X X X Z
H HXLL
HHXHH
HL↓LL
HL↓HH
HLHXB
0
‡
HLLXB
0
§
†
A-to-B data flow is shown: B-to-A flow is similar but
uses OEBA
, LEBA, and CLKBA.
‡
Output level before the indicated steady-state input
conditions were established
§
Output level before the indicated steady-state input
conditions were established, provided that CLKAB
was low before LEAB went low