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PS8354B

09/22/04

Description

PericomSemiconductor’sPI74ALVTC16245isa16-bitbidirectional

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 Hi-Z condition.

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

down, OE should be tied to Vdd through a pullup resistor; the

minimum value of the resistor is determined by the current-sinking

capability of the driver.

The family offers both I/O Tolerant, which allows it to operate in

mixed 1.8/3.6V systems, and “Bus Hold,” which retains the data

input’s last state whenever the data input goes to high-impedance,

preventing “floating” inputs and eliminating the need for pullup/

down resistors.

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Features

• PI74ALVTC family is designed for low voltage operation,

• Supports Live Insertion

• 3.6V I/O Tolerant Inputs and Outputs

• Bus Hold

• High Drive, -32/64mA @ 3.3V

• Uses patented noise reduction circuitry

• Power-off high impedance inputs and outputs

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

• Packaging (Pb-free & Green available):

– 48-pin 240- mil wide plastic TSSOP (A)

– 48-pin 173-mil wide plastic TVSOP (K)

– 48-pin 300-mil wide plastic SSOP (V)

PI74ALVTC16245

16-Bit BiDirectional Transceiver

with 3-State Outputs

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