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PI5C32X384CA

20-Bit, 2-Port BusSwitch

Pericom Semiconductor Corporation 

PI5C32X384/PI5C32X384C

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Power Supply Characteristics

Parameters

Description

Test Conditions(1)

Min. Typ(2) Max. Units

ICC

∆ICC

Quiescent Power

Supply Current

VCC = Max.

Supply Current per VCC = Max.

Input @ TTL HIGH

VIN = GND or VCC PI5C32X384C

PI5C32X384

VIN = 3.4V(3)

60 200 µA

0.1 3.0

2.5 mA

ICCD

Supply Current per VCC = Max.,

Input per MHz(4) A and B Pins Open

BE1 or BE2 = GND

Control Input Toggling

50% Duty Cycle

0.25 mA/

MHz

Notes:

1. For Max. or Min. conditons, 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.

PI5C32X384/PI5C32X384C Switching Characteristics over Operating Range

Parameters Description

tPLH

Propagation Delay(2,3)

tPHL

Ax to Bx, Bx to Ax

tPZH

Bus Enable Time

tPZL

BEX to Ax or Bx

tPHZ

Bus Disable Time

tPLZ

BEx to Ax or Bx

Conditions(1)

CL = 50pF

RL = 500Ω

PI5C32X384/32X384C

Min.

Typ.

Max.

—

0.25

—

Units

1.5

—

6.5

ns

1.5

—

5.5

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.

Pericom Semiconductor Corporation

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

3

PS7027D 05/10/99

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