PI74AVC+16268AX Pericom Semiconductor, PI74AVC+16268AX Datasheet

PI74AVC+16268AX

Manufacturer Part Number

PI74AVC+16268AX

Description

Manufacturer

Pericom Semiconductor

Datasheet

1.PI74AVC16268AX.pdf (11 pages)

Specifications of PI74AVC+16268AX

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Product Features

• PI74AVC+16268 is designed for low-voltage operation,

• True ±24mA Balanced Drive @ 3.3V

• I

• 3.6 I/O Tolerant Inputs and Outputs

• All outputs contain a patented DDC

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

• Packaging: (Pb-free & Green available):

Logic Block Diagram

(Dynamic DriveControl) circuit that reduces noise without

degrading propagation delay.

V CC = 1.65V to 3.6V

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

OFF

06-0166

supports partial power-down operation

CLKEN1B

CLKENA1

CLKENA2

CLKEN2B

OEA

OEB

SEL

CLK

1 of 12 Channels

Product Description

The PI74AVC+16268, a 12-bit to 24-bit registered bus exchanger

designed for 1.65V to 3.6V V

in which data must be transferred from a narrow high-speed bus to

a wide, lower frequency bus. It provides synchronous data exchange

between the two ports. Data is stored in internal registers on the low-

to-high transition of the clock (CLK) input when appropriate clock-

enable (CLKEN) inputs are low. The select (SEL) line is synchronous

with CLK and selects 1B or 2B input data for the A outputs.

For data transfer in the A-to-B direction, a two-stage pipeline is

provided in the A-to-1B path, with a single storage register in the

A-to-2B path. Proper control of these inputs allows two sequential

12-bit words to be presented synchronously as a 24-bit word on the

B-port. Data flow is controlled by the active-low output enables

(OEA, OEB). These control terminals are registered so bus direction

changes are synchronous with CLK.

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

down, a clock pulse should be applied as soon as possible and OE

should be tied to V

of the resistor is determined by the current-sinking capability of the

driver. Because OE is being routed through a register, the active

state of the outputs cannot be determined prior to the arrival of the

first clock pulse.

Exchanger with 3-State Outputs

12-Bit to 24-Bit Registered Bus

through a pullup resistor, the minimum value

operation, is used for applications

PI74AVC+16268

PS8551A

06/01/06

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... Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • Pb-free & Green • Adding an X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 06-0166 .236 .244 .547 13.9 .555 14.1 .047 1.20 Max. .007 .002 .011 .006 ...

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