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PI5C3253CL

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

Pericom Semiconductor 

PI5C3253C

Dual 4:1 Mux/Demux Bus Switch

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Power Supply Characteristics

Parameters Description

ICC

Quiescent Power

Supply Current

∆ICC

Supply Current per

Input @ TTL HIGH

Test Conditions(1)

VCC = Max.

VIN = GND or VCC

VCC = Max.

VIN = 3.4V(3)

Min. Typ.(2) Max.

100

Units

µA

2.5 mA

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at VCC = 5.0V, +25°C ambient.

3. Per TTL driven input (VIN = 3.4V, control inputs only); I and Y pins do not contribute to ICC.

Switching Characteristics over Operating Range

PI5C3253C

Com.

Parameters Description

Conditions(1) Min.

Max.

tIY

Propagation Delay(2,3)

0.25

In to Yn

tSY

Bus Select Time

CL = 50pF

0.5

4.5

Sn to Yn

RL = 500ohm

tPZH Bus Enable Time

0.5

4.0

tPZL En to Yn

tPHZ

tPLZ

Bus Disable Time

En to Yn

0.5

4.5

Units

ns

Notes:

1. See test circuit and waveforms.

2. This parameter is guaranteed but not tested on Propagation Delays.

3. The bus switch contributes no propagational delay other than the RC delay of the ON

resistance of the switch and the load capacitance. The time constant for the switch alone

is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the

rise/fall times of typical driving signals, it adds very little propagational delay to the

system. Propagational delay of the bus switch when used in a system is determined by

the driving circuit on the driving side of the switch and its interaction with the load on

the driven side.

Ordering Information

Part

Pin-Package

Temperature

PI5C3253CL

PI5C3253CQ

16- TSSOP (L)

16- QSOP (Q)

–40°C to +85°C

3

PS8490

02/21/01

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