PI2BV3877Q 查看數據表（PDF） - Pericom Semiconductor Corporation

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PI2BV3877Q

2.5V, 10-Bit, 2-Port 266 MHz DDR BusSwitch

Pericom Semiconductor Corporation 

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2.5V, 10-Bit, 2-Port

266 MHz DDR BusSwitch

Product Features

• 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-pin 173 mil wide plastic TSSOP (L)

Product Description

Pericom Semiconductor’s PI2B series of logic circuits are produced

using the Company’s advanced submicron CMOS technology,

achieving industry leading performance.

The PI2BV3877 is a 10-bit, 2.5 volt two-port bus switch designed with

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

the Bus Enable (BEN) input signals.

The PI2BV3877 switch is intended for 266 MHz DDR(X4) Memory

Module Applications.

Logic Block Diagram

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)"

8??

*-

)#

)'

Product Pin Configuration

*

BE0

1

24

VCC

A0

2

23

B0

A1

3

22

B1

*"

A2

4

21

B2

A3

5 24-Pin 20

B3

A4

6 Q, L 19

B4

A5

7

18

B5

A6

8

17

B6

*#

A7

9

16

B7

A8

10

15

B8

A9

11

14

B9

*'

GND

12

13

BE1

8??

*-

Product Pin Description

Pin Name

Description

BE0, BE1

Bus Enable Input (Active LOW)

A0–9

Bus A

B0–9

Bus B

GND

Ground

VCC

Power

Truth Table(1)

Function

Disconnect

Connect

BE0 A0–A4

H Hi-Z

L B0–4

Function

Disconnect

Connect

BE1 A5–A9

H Hi-Z

L B5–B9

Notes: 1. H = High Voltage Level

L = Low Voltage Level

Hi-Z = High Impedance

1

PS8472A 05/02/00

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