PI74AVC16836AE Просмотр технического описания (PDF) - Pericom Semiconductor Corporation

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PI74AVC16836AE

2.5V 20-Bit Universal Bus Driver with 3-State Outputs

Pericom Semiconductor Corporation 

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2.5V 20-Bit Universal Bus

Driver with 3-State Outputs

Features

• PI74AVC+16836 is designed for low-voltage operation,

VCC = 1.65V to 3.6V

• True ±24mA Balanced Drive @ 3.3V

• IOFF supports partial power-down operation

• 3.6V I/O Tolerant inputs and outputs

• Meets PC133 SDRAM Registered DIMM Specifications

• All outputs contain a patented DDC

(Dynamic Drive Control) circuit that reduces noise without

degrading propagation delay

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

• Packaging (Pb-free & Green available):

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

Description

Pericom Semiconductor’s 20-bit PI74AVC+16836 universal bus

driver is designed for 1.65V to 3.6V VCC operation.

Data flow from A to Y is controlled by the Output Enable (OE) input.

The device operates in the transparent mode when the latch-enable

(LE) input is LOW. When LE is HIGH, the A data is latched if the

clock (CLK) input is held at a high or low logic level. If LE is HIGH,

the A data is stored in the latch/flip-flop on the low-to-high

transition of CLK. When OE is HIGH, the outputs are in the high-

impedance state, but all the inputs are enabled and data is capable

of being stored in the register.

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

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

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

capability of the driver.

Block Diagram

1

OE

56

CLK

29

LE

A1 55

1D

C1

CLK

2

Y1

TO 19 OTHER CHANNELS

08-0291

1

PS8511E 10/17/08

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