PI5C3245LE datasheet(3/5 Pages) PERICOM

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PI5C3245

8-Bit, 2-Port Bus Switch

Power Supply Characteristics

Parameters Description

Test Conditions(1)

Min

Typ (2)

Max

Units

ICC

Quiescent Power Supply

Current

VCC = Max.

VIN = GND or VCC

0.1

3.0

μA

ΔICC

Supply Current @ Input

HIGH

VCC = Max.

VIN = 3.4V(3)

2.5

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.

A and B Pins Open

BE = 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.

Switching Characteristics over Operating Range

Parameters Description

Test Conditions

Com.

Units

Min

Max

tPLH

tPHL

Propagation Delay(1,2)

Ax to Bx, Bx to Ax

CL = 50 pF

RL = 500Ω

0.25

tPZH

tPZL

Bus Enable Time

BE to Ax or Bx

1.5

6.5

tPHZ

tPLZ

Bus Disable Time

BE to Ax or Bx

1.5

5.5

Notes:

1. This parameter is guaranteed but not tested on Propagation Delays.

2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load ca-

pacitance. The time constant for the switch alone is of the order of 0.25 ns for 50 pF 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.

11-0008

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