Datasheet

SN74ALVCH162268
12-BIT TO 24-BIT REGISTERED BUS EXCHANGER
WITH 3-STATE OUTPUTS
SCES018F – AUGUST 1995 – REVISED FEBRUARY 1999
4–30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH162268 is characterized for operation from –40°C to 85°C.
Function Tables
OUTPUT ENABLE
INPUTS OUTPUTS
CLK OEA OEB A 1B, 2B
↑ H H Z Z
↑ HL ZActive
↑ L H Active Z
↑ L L Active Active
A-TO-B STORAGE
(OEB
= L)
INPUTS OUTPUTS
CLKENA1 CLKENA2 CLK A 1B 2B
H H X X 1B
0
‡
2B
0
‡
L L ↑ LL
†
X
L L ↑ HH
†
X
X L ↑ LXL
X L ↑ H X H
†
Two CLK edges are needed to propagate data.
‡
Output level before the indicated steady-state input
conditions were established
B-TO-A STORAGE
(OEA
= L)
INPUTS
OUTPUT
CLKEN1B CLKEN2B CLK SEL 1B 2B
A
H X X H X X A
0
‡
X HXLXXA
0
‡
L L ↑ HLX L
L L ↑ HHX H
X L ↑ LXL L
X L ↑ L X H H
‡
Output level before the indicated steady-state input conditions were
established