PI74LPT543 查看數據表（PDF） - Pericom Semiconductor

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PI74LPT543

Fast CMOS 3.3V 8-Bit Latched Transceiver

Pericom Semiconductor 

PI74LPT543

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Fast CMOS 3.3V 8-Bit

Latched Transceiver

Product Features

• Compatible with LCX™ and LVT™ families of products

• Supports 5V tolerant mixed signal mode operation

– Input can be 3V or 5V

– Output can be 3V or connected to 5V bus

• Advanced low power CMOS operation

• Excellent output drive capability:

Balanced drives (24 mA sink and source)

• Low ground bounce outputs

• Hysteresis on all inputs

• Industrial operating temperature range: –40°C to +85°C

• Packages available:

– 24-pin 173-mil wide plastic TSSOP (L)

– 24-pin 150-mil wide plastic QSOP (Q)

– 24-pin 150-mil wide plastic TQSOP (R)

– 24-pin 300-mil wide plastic SOIC (S)

Product Description

Pericom Semiconductor’s PI74LPT series of logic circuits are pro-

duced in the Company’s advanced 0.6 micron CMOS technology,

achieving industry leading speed grades.

The PI74LPT543 is an 8-bit wide non-inverting transceiver designed

with two sets of eight D-type latches with separate input and output

controls for each set. For data flow from A to B, for example, the

A-to-B Enable (CEAB) input must be LOW in order to enter data

from A0–A7 or to take data from B0–B7, as indicated in the Truth

Table. With CEAB LOW, a LOW signal makes the A-to-B latches

transparent; a subsequent LOW-to-HIGH transition of the LEAB

signal puts the A latches in the storage mode and their outputs no

longer change the A inputs. With CEAB and OEAB both LOW, the

3-state B output buffers are active and reflect the data present at the

output of the A latches. Control of data from B to A is similar, but

uses the CEAB, LEAB, and OEAB inputs.

The PI74LPT543 can be driven from either 3.3V or 5.0V devices

allowing this device to be used as a translator in a mixed

3.3/5.0V system.

Logic Block Diagram

1

PS2062A 01/15/97

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