1

PS8472A

05/02/00

ProductPinConfiguration

Product Pin Description

PinName

Description

BE0, BE1

Bus Enable Input (Active LOW)

A0–9

Bus A

B0–9

Bus B

GND

Ground

Power

Function

Disconnect

H

Hi-Z

Connect

L

Notes:1. H = High Voltage Level

L = Low Voltage Level

Hi-Z = High Impedance

Logic Block Diagram

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PI2BV3877

2.5V, 10-Bit, 2-Port

266 MHz DDR BusSwitch

ProductDescription

Pericom Semiconductor’sPI2Bseriesoflogiccircuitsareproduced

using the Company’s advanced submicron CMOS technology,

achieving industry leading performance.

ThePI2BV3877isa10-bit,2.5volttwo-portbusswitchdesignedwith

a low ON resistance allowing inputs to be connected directly to

outputs. The bus switch creates no additional propagational delay

or additional ground bounce noise. The switches are turned ON by

ThePI2BV3877switchisintendedfor266MHzDDR(X4)Memory

Module Applications.

ProductFeatures

• Used in X4 DDR modules

• Near zero propagation delay

• 20 Ohm switches connect inputs to outputs

• Fast Switching Speed –3ns (max.)

• Low Off Capacitance (3pF)

• Pull-down on B output

• Pull-up on Switch Enable

• Packages available:

– 24-pin 150 mil wide plastic QSOP (Q)

–24-pin173milwideplasticTSSOP(L)

Function

Disconnect

H

Hi-Z

Connect

L

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

GND

24-Pin

Q, L

*-

8??

*-

8??