PI3C3244 datasheet(3/4 Pages) PERICOM

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PI3C3244

2.5V/3.3V,HighBandwidth,

Hot Insertion, 8-Bit, 2-Port Bus Switch

PS8149B

12/10/99

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PI3C3244

Com.

Parameters Description

Conditions(1)

Min.

Max.

Units

tPLH

Propagation Delay(2,3) CL = 50 pF,

0.25

tPHL

Ax to Bx

RL = 500Ω

tPZH

Bus Enable Time

1.5

6.5

tPZL

BE to Ax or Bx

CL = 50 pF,

tPHZ

Bus Disable Time

RL = 500Ω,

1.5

5.5

tPLZ

BE to Ax or Bx

R = 500

Ω

Power Supply Characteristics

Parameters Description

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Units

ICC

Quiescent Power

VCC = Max.

VIN = GND or VCC

260

500

Supply Current

∆ICC

Supply Current per

VCC = Max.

VIN = 3.0V

(3)

750

Input HIGH

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

2. Typical values are at VCC = 3.3V, +25°C ambient.

3. Per driven input (control input only); A and B pins do not contribute to

∆ICC.

Switching Characteristics over 3.3V Operating Range

µA

PI3C3244

Com.

Parameters Description

Conditions

(1)

Min.

Max.

Units

tPLH

Propagation Delay

(2,3)

CL = 50 pF,

0.25

tPHL

Ax to Bx

RL = 500Ω

tPZH

Bus Enable Time

1.5

9.8

tPZL

BE to Ax or Bx

CL = 50 pF,

tPHZ

Bus Disable Time

RL = 500Ω,

1.5

8.3

tPLZ

BE to Ax or Bx

R = 500

Ω

Switching Characteristics over 2.5V Operating Range

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.

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