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PI74ALVCH16863

18-Bit Transceiver with 3-State Outputs

Pericom Semiconductor 

PI74ALVCH16863

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18-Bit Transceiver with 3-State Outputs

Product Features

· PI74ALVCH16863 is designed for low voltage operation

· VCC = 2.3V to 3.6V

· Hysteresis on all inputs

· Typical VOLP (Output Ground Bounce)

< 0.8V at VCC = 3.3V, TA = 25°C

· Typical VOHV (Output VOH Undershoot)

< 2.0V at VCC = 3.3V, TA = 25°C

· Bus Hold retains last active bus state during 3-State,

eliminating the need for external pullup resistors

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

· Packages available:

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

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

Product Description

Pericom Semiconductor’s PI74ALVCH series of logic circuits are

produced in the Company’s advanced 0.5 micron CMOS technology,

achieving industry leading speed.

The PI74ALVCH16863 is an 18-bit noninverting transceiver designed

for synchronous communication between data buses. The control-

function implementation minimizes external timing requirements.

The PI74ALCH16863 can be used as two 9-bit transceivers or one 18-

bit transceiver.They allow 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 output-enable (OEAB or OEBA) inputs.

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 capability

of the driver.

The PI74ALVCH16863 has “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.

Logic Block Diagram

1OEBA 56

1OEAB 1

55

1A1

29

2OEBA

2OEAB 28

2

1B1

41

2A1

16

2B1

To Eight Other Channels

To Eight Other Channels

1

PS8312 08/04/98

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