PI5C16244/162244

16-BIT BUS SWITCH BUFFER

122

PS7024B 09/17/96

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Product Features:

• Near-zero propagation delay

•5

Ω switches connect inputs to outputs when enabled

•

Direct bus connection when switches are ON

•

Ultra-low quiescent power (0.2 µA typical)

– Ideally suited for notebook applications

•

Pin compatible with 74 series16244

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

• Packages available:

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

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

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

Product Description:

Pericom Semiconductor’s PI5C series of logic circuits are pro-

duced in the Company’s advanced 0.6 micron CMOS technology.

The PI5C16244 and PI5C162244 are 16-bit, 4-port bus switches

that are pin compatible with the 74 series 16244 16-bit driver. Four

enable signals (nBE) turn the switches on similar to the enable

signals of the 16244. The bus switch creates no additional propagation

delay or ground bounce noise.

The PI5C162244 device has a built-in 25-ohm series resistor to

reduce noise because of reflections, thus eliminating the need for an

external terminating resistor.

PI5C16244

PI5C162244 (25

Ω

Ω

Ω

Ω

Ω)

16-Bit BusSwitch

Logic Block Diagram

Product Pin Description

Function

nBE

Disconnect

H

Hi-Z

Connect

L

Note: 1. H = High Voltage Level

L = Low Voltage Level

Hi-Z = High Impedance

Pin Name

I/O

Description

nBE

I

Bus Output Enable

(Active LOW)

I/O

Bus A

I/O

Bus B

Product Pin Configuration

1

BE

2

BE

3

BE

4

BE

1

BE

1

1

2

1

3

GND

4

1

5

1

6

7

2

8

2

9

GND

10

2

11

2

12

3

13

3

14

GND

15

3

16

3

17

18

4

19

4

20

GND

21

4

22

4

23

4

BE

24

2

BE

48

1

47

1

46

GND

45

1

44

1

43

42

2

41

2

40

GND

39

2

38

2

37

3

36

3

35

GND

34

3

33

3

32

31

4

30

4

29

GND

28

4

27

4

26

3

BE

25

48-PIN

A,V,B