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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

GRD OR ZRD PACKAGE

(TOP VIEW)

J

H

G

F

E

D

C

B

A

2

1

3

4

6

5

SN74LVCHR16245A

16-BIT BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCAS582P – NOVEMBER 1996 – REVISED DECEMBER 2005

This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the

A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR)

input. The output-enable (OE) input can disable the device so that the buses are effectively isolated.

All outputs, which are designed to sink up to 12 mA, include equivalent 26-

Ω series resistors to reduce overshoot

and undershoot.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in

a mixed 3.3-V/5-V system environment.

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

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

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or

pulldown resistors with the bus-hold circuitry is not recommended. The bus-hold circuitry is part of the input

circuit and is not disabled by OE or DIR.

(56-Ball GQL/ZQL Package)

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

G2B3

2B4

GND

GND

2A4

2A3

H

2B5

2B6

2A6

2A5

J

2B7

2B8

GND

GND

2A8

2A7

xxxxx

K

2DIR

NC

NC

NC

NC

2OE

(1)

NC – No internal connection

(54-Ball GRD/ZRD Package)

1

2

3

4

5

6

A

1B1

NC

1DIR

1OE

NC

1A1

B

1B3

1B2

NC

NC

1A2

1A3

C

1B5

1B4

1A4

1A5

D

1B7

1B6

GND

GND

1A6

1A7

E

2B1

1B8

GND

GND

1A8

2A1

F

2B3

2B2

GND

GND

2A2

2A3

G

2B5

2B4

2A4

2A5

H

2B7

2B6

NC

NC

2A6

2A7

J

2B8

NC

2DIR

2OE

NC

2A8

(1)

NC – No internal connection

2