1

PS8325

09/14/98

Product Description

Pericom Semiconductor’s PI74VCX series of logic circuits are

produced in the Company’s advanced 0.35 micron CMOS

technology, achieving industry leading speed.

The PI74VCX16245 is a 16-bit bidirectional transceiver designed

for asynchronous two-way communication between data buses.

The direction control input pin (xDIR) determines the direction of

data flow through the bidirectional transceiver. The Direction and

Output Enable controls are designed to operate this device as either

two independent 8-bit transceivers or one 16-bit transceiver. The

output enable (OE) input, when HIGH, disables both A and B ports

by placing them in HIGH Z condition.

To ensure the high-impedance state during power up or power

down, OE should be tied to Vcc through a pull-up resistor; the

minimum value of the resistor is determined by the current sinking

ability of the driver.

The PI74VCX family is I/O Tolerant, allowing it to operate in

mixed 1.8V/3.6V systems.

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Product Features

• The PI74VCX family is designed for low voltage operation

• 3.6V I/O Tolerant Inputs and Outputs

• Supports Live Insertion

• Balanced output drive, ±24mA

• Uses patented Noise Reduction Circuitry

• Power-Off High Impedance inputs and outputs

• Industrial operation at –40°C to +85°C

• Packages available:

–48-pin240mil.wideplasticTSSOP(A)

–48-pin300mil.wideplasticSSOP(V)

PI74VCX16245

2.5V 16-Bit Bidirectional Transceiver

with 3-State Outputs

Logic Block Diagram

1OE

1DIR

1

2

2

2

OE

2

DIR

2

2

2

2

2

2

2

2

2

2

2

2

2

2