4

PS8512

03/14/01

PI5C3125C/3126C

4-BitBusSwitchwith

–2VUndershootProtection

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PI5C3125CSwitchingCharacteristicsoverOperatingRange

Notes:

1. See test circuit and wave forms.

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.

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PI5C3126CSwitchingCharacteristicsoverOperatingRange

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ApplicationsInformation

LogicInputs

The logic control inputs can be driven up to +5.5V regardless of the

supplyvoltage.Forexample,givena+5.0Vsupply,BE,maybedriven

power consumption.

Power-SupplySequencing

Proper power-supply sequencing is recommended for all CMOS

devices. Always apply Vcc before applying signals to the input/

output or control pins.