Datasheet

SN74ALVCHR16601
18-BIT UNIVERSAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES123F – SEPTEMBER 1997 – REVISED MARCH 1999
4–126
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 SN74ALVCHR16601 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
†
INPUTS
OUTPUT
CLKENAB OEAB
LEAB
CLKAB
A
B
X H X X X Z
X LH XL L
X LH XH H
H LL XXB
0
‡
L LL ↑ LL
L LL ↑ HH
L L L L or H X B
0
‡
†
A-to-B data flow is shown: B-to-A flow is similar but uses OEBA
,
LEBA, CLKBA, and CLKENBA
.
‡
Output level before the indicated steady-state input conditions were
established
logic diagram (positive logic)
CE
1D
C1
CLK
CE
1D
C1
CLK
B1
OEAB
CLKENAB
CLKAB
LEAB
LEBA
CLKBA
CLKENBA
OEBA
A1
1
56
55
2
28
30
29
27
3
54
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