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PI5C32861S

10-Bit, 2-Port Bus Switch with 25Ω Series Resistor

Pericom Semiconductor Corporation 

PI5C32861

10-Bit, 2-Port Bus Switch

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Power Supply Characteristics

Parameters Description

Test Conditions(1)

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)

0.1 10 µA

2

2.5 mA

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.,

A and B Pins Open

3 0.25 mA/

MHz

BE = GND

Control Input Toggling

50% Duty Cycle

4

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.

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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.

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Switching Characteristics over Operating Range

Parameters

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

Description

Propagation Delay(2,3)

Ax to Bx, Bx to Ax

Bus Enable Time

BE to Ax or Bx

Bus Disable Time

BE to Ax or Bx

Conditions(1)

CL = 50pF

RL = 500Ω

PI5C32861

Com.

Min

Max

1.25

1.5

6.5

1.5

5.5

Units

ns

ns

ns

7

8

9

10

Notes:

1. See test circuit and waveforms.

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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 1.25ns for 50pF load. Since this time constant is much

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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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Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

3

PS8104 03/14/97

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