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PI5C16862CA

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

Quiescent Power

Input @ TTL HIGH

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.

Test Conditions(1)

VIN = GND or VCC

VCC = Max.

VIN = 3.4V(3)

VCC = Max., A and B Pin Open

BEx = GND, Control Input Toggling, 50% Duty Cycle

Min.

Typ.(2)

120

Max. Units

200 µA

2.5 mA

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 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.

Switching Characteristics over Operating Range

Parameters

Description

Conditions(1)

PI5C16862C

Com.

Units

Min.

Max.

tPLH

Propagation Delay(2,3)

tPHL

Ax to Bx, Bx to Ax

0.25

tPZH

Bus Enable Time

tPZL

BEx to Ax or Bx

CL = 50pF

RL = 500Ω

1.5

6.5

ns

tPHZ

Bus Disable Time

tPLZ

BEx to Ax or Bx

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.

3

PS8391C

09/15/04

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