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PI5C34X245Z

32-Bit, 2-Port Bus Switch

Pericom Semiconductor 

PI5C34X245

32-Bit, 2-Port BusSwitch 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122

Power Supply Characteristics

Parameters

Description

ICC

Quiescent Power Supply Current

∆ICC

ICCD

Supply Current per Input @ TTL HIGH

Supply Current per Input per MHz(4)

Test Conditions(1)

VCC = Max.

VCC = Max.

VIN = GND or VCC

VIN = 3.4V(3)

VCC = Max.,

A & B Pins Open

BEn = GND,

Control Input

Toggling

50% Duty Cycle

Min. Typ(2) Max. Units

–– 0.1 3.0 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 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.

PI5C34X245 Switching Characteristics over Operating Range

Parameter

tPLH

tPHL

tPZH

tPZL

tPHZ

tPLZ

Description

Propagation Delay(2,3)

AX to Bx, Bx to Ax

Bus Enable Time

BEx to Ax or Bx

Bus Disable Time

BEx to Ax or Bx

Conditions(1)

CL = 50pF

RL = 500 ohms

PI5C34X245

Com.

Min.

Max.

0.25

1.5

5.6

1.5

5.2

Units

ns

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.

PS7058C 08/02/01

3

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