Datasheet

SN74GTL1655
16-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVER
WITH LIVE INSERTION
SCBS696G – JULY 1997 – REVISED AUGUST 2001
2–5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function Tables
FUNCTION
†
INPUTS
OUTPUT
MODE
OEAB LEAB CLK A
B
MODE
H X X X Z Isolation
L HXL L Transparent
L HXH H Transparent
L L ↑ LL Registered
L L ↑ HH Registered
L LHXB
0
‡
Previous state
L L L X B
0
§
Previous state
†
A-to-B data flow is shown. B-to-A flow is similar, but uses OEBA
, LEBA,
and CLK.
‡
Output level before the indicated steady-state input conditions were
established, provided that CLK was high before LEAB went low
§
Output level before the indicated steady-state input conditions were
established
OUTPUT ENABLE
INPUTS
OUTPUTS
OE OEAB OEBA A PORT B PORT
L L L Active Active
L LH ZActive
L H L Active Z
L HH Z Z
H X X Z Z
B-PORT EDGE-RATE CONTROL (V
ERC
)
INPUT V
ERC
OUTPUT
LOGIC
LEVEL
NOMINAL
VOLTAGE
B-PORT
EDGE RATE
H V
CC
Slow
L GND Fast