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SN74GTL1655

16-BIT LVTTL-TO-GTL/GTL+ UNIVERSAL BUS TRANSCEIVER

WITH LIVE INSERTION

SCBS696I – JULY 1997 – REVISED APRIL 2005

FUNCTION TABLES

ABC

INPUTS

OUTPUT

MODE

B

OEAB

LEAB

CLK

A

H

X

X

X

Z

Isolation

L

H

X

L

L

Transparent

L

H

X

H

H

Transparent

L

L

↑

L

L

Registered

L

L

↑

H

H

Registered

L

L

H

X

Previous state

L

L

L

X

Previous state

(1)

A-to-B data flow is shown. B-to-A flow is similar, but uses OEBA,

LEBA, and CLK.

(2)

Output level before the indicated steady-state input conditions were

established, provided that CLK was high before LEAB went low

(3)

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

L

H

Z

Active

L

H

L

Active

Z

L

H

H

Z

Z

H

X

X

Z

Z

OUTPUT

B-PORT

LOGIC

NOMINAL

EDGE RATE

LEVEL

VOLTAGE

H

Slow

L

GND

Fast

3