PI5C3400 データシートの表示（PDF） - Pericom Semiconductor

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PI5C3400

4-Bit, 4-Port Bus Exchange Switch

Pericom Semiconductor 

PI5C3400

4-BIT, 4-PORT BUS

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Power Supply Characteristics

Parameters Description

Test Conditions(1)

Min. Typ(2) Max. Units

ICC

Quiescent Power

Supply Current

∆ICC

Supply Current per

Input @ TTL HIGH

VCC = Max.

VCC = Max.

VIN = GND or VCC

VIN = 3.4V(3)

0.1 3.0 µA

2.5 mA

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

tPLH

Propagation Delay(2,3)

tPHL

Ax to Cx, Bx to Dx

tPZH

Bus Enable Time

tPZL

BE to Cx or Dx

tPHZ

Bus Disable Time

tPLZ

BE to Cx or Dx

tBX

Bus Exchange Time

BXX to Cx or Dx

Conditions(1)

CL = 50 pF

RL = 500Ω

PI5C3400

Com.

Min.

Max.

0.25

Unit

ns

1.5

6.5

ns

1.5

5.5

ns

1.5

6.5

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 0.25 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.

Pericom Semiconductor Corporation

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

193

PS8191 05/07/98

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