www.ti.com

FUNCTIONAL DESCRIPTION

1DIR

1OE

1A1

1B1

A3

A2

A4

A5

2DIR

2OE

2A1

2B1

H3

E2

H4

E5

To Seven Other Channels

F4

To Seven Other Channels

SN74GTLPH32945

32-BIT LVTTL-TO-GTLP BUS TRANSCEIVER

SCES293C – OCTOBER 1999 – REVISED JUNE 2005

The SN74GTLPH32945 is a medium-drive (50-mA), 32-bit bus transceiver partitioned as four 8-bit segments and

is designed for asynchronous communication between data buses. The device transmits data from the A port to

the B port or from the B port to the A port, depending on the logic level at the direction-control (DIR) input. OE

can be used to disable the device so the buses are effectively isolated. Data polarity is noninverting.

For A-to-B data flow, when OE is low and DIR is high, the B outputs take on the logic value of the A inputs.

When OE is high, the outputs are in the high-impedance state.

The data flow for B to A is similar to that of A to B, except OE and DIR are low.

FUNCTION TABLE

INPUTS

OUTPUT

MODE

OE

DIR

H

X

Z

Isolation

L

L

B data to A port

True transparent

L

H

A data to B port

LOGIC DIAGRAM (POSITIVE LOGIC)

(1)

3