PERIC PI3B32X384 Datasheet

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PI3B32X384

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3.3V, Hot Insertion, 20-Bit, 2-Port Bus Switch

Product Features

Near-zero propagation delay

5 Ω switches connect inputs to outputs

Direct bus connection when switches are ON

Ultra-low quiescent power 32X384 (0.2µA typical)

Ideally suited for notebook applications

Fast Switching Speed - 4.5ns max.

Permits Hot Insertion

TTL - compatible control of input levels

Packages available:

48-pin 150-mil wide plastic BQSOP (B)

Product Description

Pericom Semiconductor’s PI3B series of BusSwitch circuits are produced using the Company’s advanced submicron CMOS technology, achieving industry leading performance.

The PI3B32X384 is a 3.3V, 20-bit 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 (BE) input signal. Four bus enable signals are provided, one for each of the upper and lower five bits of the two 10-bit buses.

Logic Block Diagram

Product Pin Configuration

A0

 

B0

A5

 

B5

BEA

1

 

48

VCC

 

 

 

 

 

 

 

B0

2

 

47

B19

 

 

 

 

 

 

 

A0

3

 

46

A19

 

A4

 

B4

A9

 

B9

A1

4

 

45

A18

 

 

 

 

 

 

 

 

 

A15

 

B15

A10

 

B10

B1

5

 

44

B18

 

 

 

B2

6

 

43

B17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A2

7

 

42

A17

 

A19

 

B19

A14

 

B14

A3

8

 

41

A16

 

 

 

B3

9

 

40

B16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B4

10

48-Pin

39

B15

 

BEA

 

 

 

 

 

A4

11

B

38

A15

 

BEB

 

 

 

 

 

GND

12

 

37

BEB

 

 

 

 

 

 

BEC

13

 

36

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B5

14

 

35

B14

 

BEC

 

 

 

 

 

A5

15

 

34

A14

 

BED

 

 

 

 

 

A6

16

 

33

A13

 

 

 

 

 

 

 

B6

17

 

32

B13

 

Truth Table(1)

 

 

 

 

 

B7

18

 

31

B12

 

 

 

 

 

 

A7

19

 

30

A12

 

 

 

 

 

 

 

 

 

Function

BEA

BEB

B4–B0

B19-B15

 

A8

20

 

29

A11

 

Disconnect

H

H

Hi-Z

Hi-Z

 

B8

21

 

28

B11

 

 

B9

22

 

27

B10

 

Connect

L

H

A4-A0

Hi-Z

 

 

 

 

A9

23

 

26

A10

 

Connect

H

L

Hi-Z

A19-A15

 

 

 

 

GND

24

 

25

BED

 

Connect

L

L

A4-A0

A19-A15

 

 

 

 

 

 

 

 

 

 

Function

BEC

BED

B9–B5

B14-B10

 

 

 

 

 

 

 

Disconnect

H

H

Hi-Z

Hi-Z

Product Pin Description

 

 

 

Connect

L

H

A9-A5

Hi-Z

Pin Name

Description

 

 

 

Connect

H

L

Hi-Z

A14-A10

BEx

Bus Enable Inputs (Active LOW)

A19-A0

Bus A

 

 

 

 

Connect

L

L

A9-A5

A14-A10

 

 

 

 

B19-B0

Bus B

 

 

 

 

Note:

 

 

 

 

 

 

 

 

 

 

 

 

GND

Ground

 

 

 

 

1.H = High Voltage Level

 

 

 

VCC

Power

 

 

 

 

L = Low Voltage Level

 

 

 

 

 

 

 

 

 

 

Hi-Z = High Impedance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

PS8336A

10/01/99

 

 

 

 

 

 

 

 

 

 

 

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