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PI5C3253CL

Dual 4:1 Mux/Demux Bus Switch with –2V Undershoot Protection

Pericom Semiconductor 

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Dual 4:1 Mux/Demux Bus Switch

with –2V Undershoot Protection

Product Features

• Near zero propagation delay

• 5ohm switches connect inputs to outputs

• Direct bus connection when switches are ON

• Undershoot protection to –2V (Data Inputs Only)

• Pin compatible with 74 series 253 logic devices

• Packages available:

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

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

Product Description

Pericom Semiconductor’s PI5C series of logic circuits are produced

using the Company’s advanced submicron CMOS technology,

achieving industry leading performance.

The PI5C3253C is a Dual 4:1 multiplexer/demultiplexer with three-

state outputs that is pinout compatible with the PI74FCT253T.

Inputs can be connected to outputs with low ON resistance (5ohm)

with no additional ground bounce noise or propagation delay.

Logic Block Diagram

IB3

IB2

IB1

IB0

IA3

IA2

IA1

IA0

Product Pin Configuration

EA 1

16 VCC

S1 2

15 EB

YB

IA3 3

14 S0

IA2

4

16-Pin

L,Q

13

IB3

IA1 5

12 IB2

IA0 6

11 IB1

YA 7

10 IB0

YA

GND 8

9 YB

EA EB

S0

S1

Truth Table(1)

Enable Select Channel

EA EB S1 S0 YA YB

Function

H X X X Hi-Z X Disable A

X H X X X Hi-Z Disable B

L L L L IA0 IB0 S1-0 = 0

L L L H IA1 IB1 S1-0 = 1

L L H L IA2 IB2 S1-0 = 2

L L H H IA3 IB3 S1-0 = 2

Note: 1. H = High Logic Voltage Level

L = Low Logic Voltage Level

Hi-Z = High Impedance

Product Pin Description

Pin Name

Description

EA, EB

Enable

S0-1

Select Inputs

1AN,1BN

Data Inputs

YA, YB

Data Outputs

VCC

Power Supply Pin

GND

Ground

1

PS8490

02/21/01

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