1

PS8190D

05/04/00

B

cc

1

1

2

3

4

5

6

7

GND

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

1

A

12

A

BIASV

1

A

15

A

1

A

17

A

1

19

A

110

A

21

A

22

A

V

23

A

24

A

25

A

26

A

27

A

28

A

29

A

210

A

1B5

1

1

OE

12

B

13

B

1

B4

GND

1

17

B

18

B

1

1

GND

22

B

21

B

23

B

GND

24

2

26

B

2

2

29

B

2

2

OE

1

4

6

1A10

1A1

1OE

2A1

2OE

2A10 24

13

47

48

12

2

46

36

35

25

1 BIASV

1B1

1B10

2B1

2B10

SW

SW

SW

SW

B

A

OE

Product Description

PericomSemiconductor’sPI3Bseriesoflogiccircuitsareproduced

using the company’s advanced 0.35 micron CMOS Technology.

The PI3B16215 provides 20-bits of high-speed bus switching. Low

on-state resistance of the switch allows connections to be made

with minimal propagation delay. The device also precharges the

B-port to a user-selectable bias voltage (BIASV) to minimize live-

insertion noise.

The device is organized as dual 10-bit bus switches with individual

output-enable (OE) inputs. When OE is LOW, the corresponding

10-bit bus switch is on and port A is connected to port B. When OE

is HIGH, the switch is open, a high-impedance state exists between

the two ports, and port B is precharged to BIASV through the

equivalent of a 10-kΩ resistor.

To ensure the high-impedance state on power up or power down,

value of the resistor is determined by the current-sinking capability

of the driver connected to OE.

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Product Features

• Near Zero Propagation Delay

•5Ω Switches Connect Between Two Ports

• Fast Switching Speed: 4.5ns max.

• Permits Hot Insertion

• Isolation during Power-Off conditions

• B-Port Outputs are precharged by Bias Voltage

to minimize signal distortion during live insertion

• Package options include:

– 48-pin150-milwideplasticBQSOP(B)

–48-pin240-milwideplasticTSSOP(A)

–48-pin300-milwideplasticSSOP(V)

ProductPinConfiguration

Logic Block Diagram

3.3V, Hot Insertion, 20-Bit FET

BusSwitch w/Precharged Outputs

PI3B16215

48-Pin

A,B,V