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PI5C32161CA
(Rev.:2000)

16-Bit to 32-Bit, Demux PCI Hot-Plug Bus Switch with –2V Undershoot Protection

Pericom Semiconductor 

PI5C32161C

16-Bit to 32-Bit, Demux PCI Hot-Plug

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Capacitance (TA = 25°C, f = 1 MHz)

Parameters(5) Description

Test Conditions

Typ. Max.

Units

CIN

COFF

Input Capacitance

A/B Capacitance, Switch Off

VIN = 0V

VIN = 0V

3.5

—

pF

4.5

—

pF

CON

A/B Capacitance, Switch On

VIN = 0V

13.5

—

pF

Notes:

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

2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading.

3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.

4. Measured by the voltage drop between A and B pins at indicated current through the switch. ON resistance is determined by the

lower of the voltages on the two (A & B) pins.

5. This parameter is determined by device characterization but is not production tested.

Power Supply Characteristics

Parameters Description

Test Conditions(1)

Min. Typ(2) Max. Units

ICC

Quiescent Power

Supply Current

∆ICC

Supply Current per

Input @ TTL HIGH

VCC = Max.

VCC = Max.

VIN = GND or VCC

—

VIN = 3.4V(3)

—

other pin=VCC or GND

— 200 µA

— 2.5 mA

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.,

A and B Pins Open

Control Input Toggling

50% Duty Cycle

— — 0.25 mA/

MHz

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); A and B pins do not contribute to ICC.

4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified

frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is

guaranteed by design.

5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.

Switching Characteristics over Operating Range

PI5C32161C

Parameters Description

Conditions(1) Min.

Com.

Typ.

Max. Units

tPLH

Propagation Delay(2,3) CL = 50pF

—

0.25

—

tPHL

A to B

RL = 500Ω

tPZH

Bus Enable Time

10

—

35

ns

tPZL

SEL TO A,B

tPHZ

Bus Disable Time

1

—

6

tPLZ

SEL to A,B

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.

3

PS8421B 07/07/00

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