PERIC PI3B162861, PI3B16861 Datasheet

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PI3B16861/PI3B162861

3.3V, Hot Insertion, 20-Bit, 2-PortPI3B16861BusSwitch

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PI3B162861 (25Ω)

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3.3V, Hot Insertion, 20-Bit, 2-Port BusSwitch

Product Features

Near-zero propagation delay

5 Ω or 25Ω switches connect inputs to outputs

Fast Switching Speed - 5ns (max.)

Direct bus connection when switches are ON

Permits Hot Insertion

32X384 function with flow through pinout make board layout easier

Vcc Operating Range: 3.0V to 3.6V

Industrial operating temperature: –40°C to +85°C

Packages available:

48-pin 240-mil wide plastic TSSOP (A)

48-pin 300-mil wide plastic SSOP (V)

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

Product Description

Pericom Semiconductor’s PI3B series of Bus Switch circuits are produced in the Company’s advanced 0.35 micron CMOS technology, achieving industry leading speed.

The PI3B16861 is configured as a 3.3 volt, hot insertion, 20-bit, 2-port bus switch designed with a low ON resistance (5Ω) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switch is turned ON by the Bus Enable (BEx) input signal.

The PI3B162861 device has a built-in 25-ohm series resistor to reduce noise resulting from reflections, thus eliminating the need for an external terminating resistor.

Logic Block Diagram

 

 

A0

 

B0

 

 

A9

 

B9

 

 

 

 

 

 

BE

1

 

 

 

 

A10

 

B10

 

 

A19

 

B19

 

 

 

 

 

 

 

 

 

 

 

 

BE

2

 

 

Truth Table(1)

 

 

 

 

 

Function

BEX

A19-A0

Disconnect

 

H

 

Hi-Z

 

 

 

 

 

Connect

 

L

 

B19-B0

Note:

1.H = High Voltage Level L = Low Voltage Level Hi-Z = High Impedance

Product Pin Configuration

 

 

 

 

 

 

 

 

NC

 

1

48

 

VCC

 

 

A0

 

2

47

 

 

 

 

 

BE

1

A1

 

3

46

 

B0

 

 

A2

 

4

45

 

B1

 

 

A3

 

5

44

 

B2

 

 

A4

 

6

43

 

B3

 

 

A5

 

7

42

 

B4

 

 

A6

 

8

41

 

B5

 

 

A7

 

9

40

 

B6

 

 

A8

 

10

39

 

B7

 

 

A9

 

11

38

 

B8

 

 

GND

 

12

37

 

B9

 

 

NC

 

13

36

 

VCC

 

 

A10

 

 

 

 

 

 

14

35

 

 

BE

2

 

 

A11

 

15

34

 

B10

 

 

A12

 

16

33

 

B11

 

 

A13

 

17

32

 

B12

 

 

A14

 

18

31

 

B13

 

 

A15

 

19

30

 

B14

 

 

A16

 

20

29

 

B15

 

 

A17

 

21

28

 

B16

 

 

A18

 

22

27

 

B17

 

 

A19

 

23

26

 

B18

 

 

GND

 

24

25

 

B19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Product Pin Description

Pin Name

Description

 

 

 

 

 

 

 

Bus Enable Inputs (Active LOW)

BEx

A19-A0

Bus A

B19-B0

Bus B

1

PS8175B

11/06/98

 

 

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