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PI5C162862CA

20-Bit, 2-Port Bus Switch with Undershoot Protection

Pericom Semiconductor 

PI5C16862C

20-Bit, 2-Port 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

Min. Typ.(2) Max. Units

120 200 µA

VCC = Max.

VIN = 3.4V(3)

2.5 mA

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.,

A and B Pins Open

BEX = GND

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.

PI5C16862 Switching Characteristics over Operating Range

Parameters Description

Conditions(1)

PI5C16862C

Com.

Min.

Max.

Units

tPLH

Propagation Delay(2,3)

CL = 50pF

tPHL

Ax to Bx, Bx to Ax

RL = 500Ω

tPZH

Bus Enable Time

tPZL

BEX to Ax or Bx

tPHZ

Bus Disable Time

tPLZ

BEx to Ax or Bx

0.25

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

PS8391A

06/10/99

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