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DESCRIPTION/ORDERING INFORMATION (CONTINUED)

GQL OR ZQL PACKAGE

(TOP VIEW)

J

H

G

F

E

D

C

B

A

2

1

3

4

6

5

K

SN74LVCH16T245

16-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SCES635A – JULY 2005 – REVISED AUGUST 2005

Active bus-hold circuitry holds unused or undriven data inputs at a valid logic state. Use of pullup or pulldown

resistors with the bus-hold circuitry is not recommended.

preventing damaging current backflow through the device when it is powered down.

state. The bus-hold circuitry on the powered-up side always stays active.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

1

2

3

4

5

6

A

1DIR

NC

NC

NC

NC

1OE

B

1B2

1B1

GND

GND

1A1

1A2

C

1B4

1B3

1A3

1A4

D

1B6

1B5

GND

GND

1A5

1A6

E

1B8

1B7

1A7

1A8

F

2B1

2B2

2A2

2A1

G

2B3

2B4

GND

GND

2A4

2A3

H

2B5

2B6

2A6

2A5

J

2B7

2B8

GND

GND

2A8

2A7

K

2DIR

NC

NC

NC

NC

2OE

(1)

NC – No internal connection

(EACH 16-BIT SECTION)

CONTROL INPUTS

OUTPUT CIRCUITS

OPERATION

OE

DIR

A PORT

B PORT

L

L

Enabled

Hi-Z

B data to A bus

L

H

Hi-Z

Enabled

A data to B bus

H

X

Hi-Z

Hi-Z

Isolation

(1)

Input circuits of the data I/Os are always active.

2