1

PS7025D

01/24/06

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Features:

• Near-Zero propagation delay

• 5-ohm switches connect inputs to outputs

• Direct bus connection when switches are ON

• Ultra-low quiescent power (0.2 μA typical) – Ideally

suited for notebook applications

• Pin compatible with 74 series16245

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

• Packages (Pb-free & Green available):

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

–48-pin150-milwideplasticBQSOP(B)

–48-pin300-milwideplasticSSOP(V)

PI5C16245

PI5C162245 (25-Ohm)

16-Bit, 2-Port Bus Switch

Block Diagram

PinConfiguration

Pin Description

Pin Name

I/O

Description

nBE

I

Bus Enable Input (Active LOW)

I/O

Bus A

I/O

Bus B

Function

nBE

Disconnect

H

Hi-Z

Connect

L

Note:

1. H

= High Voltage Level

L

= Low Voltage Level

Hi-Z = High Impedance

Description:

PericomSemiconductor’sPI5C16245andPI5C162245are16-bit,2-

port bus switches that are pin compatible with the 74 series 16245 16-

bittransceiver.Twoenablesignals(nBE)turntheswitchesonsimilar

to the enable signals of the 16245. The bus switch creates no

additional propagation delay or additional ground bounce noise.

ThePI5C162245devicehasabuilt-in25-ohmseriesresistortoreduce

noise due to reflections, thus eliminating the need for an external

terminating resistor.

1

BE

1

1

1

1

2

BE

2

2

2

2

NC

1

1

2

1

3

GND

4

1

5

1

6

7

1

8

1

9

GND

10

1

11

1

12

2

13

2

14

GND

15

2

16

2

17

18

2

19

2

20

GND

21

2

22

2

23

NC

24

1

BE

48

1

47

1

46

GND

45

1

44

1

43

42

1

41

1

40

GND

39

1

38

1

37

2

36

2

35

GND

34

2

33

2

32

31

2

30

2

29

GND

28

2

27

2

26

2

BE

25