4

PS8531

03/19/01

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PI3VT34X245

32-Bit,2-Port,LowVoltage

TranslatorBusSwitch

Pericom Semiconductor Corporation

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

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OrderingInformation

80-pin BQSOP package (Q)

3.80

4.00

0.254

.0197

0.50

5˚

Gauge Plane

.150

.157

X.XX

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

.228

.244

5.80

6.20

.010

.063

.010

.016

0.254

0.406

0.803

0.811

20.40

20.60

.007

.010

0.17

0.27

40

80

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41

1

.019

1.60

.002

.009

0.05

0.25

.078

2.0

5˚

.019

.029

0.50

0.75

.008 NOM

0.203

0.50

REF

BSC

Max

Nom

BSC

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.

Switching Characteristics over 2.5V ±0.2V Operating Range

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