PI74AVC164245AA 参数 Datasheet PDF下载

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PI74AVC164245

16-Bit 1.8-2.5V to 3.3V Level Shifting

Transceiver with 3-State Outputs

Product Features

• PI74AVC164245 is designed for low voltage operation:

1.8V - 2.5V to 3.3V

• Industrial operation at –40°C to +85°C

• Packages available:

– 48-pin plastic 300 mil SSOP (V)

– 48-pin plastic 240 mil TSSOP (A)

– 48-pin plastic 173 mil TVSOP (K)

Product Description

Pericom Semiconductor’s AVC series of logic circuits are produced

using the Company’s advanced 0.35 micron CMOS technology,

achieving industry leading performance.

Pericom Semiconductor’s PI74AVC164245, a 16-bit (dual-octal)

noninverting bus transceiver, contains two separate supply rails:

B port (V

CCB

), set at 3.3V, and A port (V

CCA

), set to operate

at 1.8-2.5V. This arrangement permits translation from a 1.8-2.5V to

3.3V environment and vice versa.

The PI74AVC164245 is designed for asynchronous communication

between data buses.

Truth Table

(each 8-bit section)

Inputs

OE

L

L

H

DIR

L

H

X

Ope ration

B data to A bus

A data to B bus

Isolation

To ensure the high impedance state during power up or power

down, the output-enable (OE) input should be tied to V

CC

through

a pullup resistor: the minimum value of the resistor is determined by

the current-sinking capability of the driver.

Logic Block Diagram

Product Pin Configuration

(LVTTL)1DIR

1

2

3

4

5

6

7

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

1OE(LVTTL)

1A1

1A2

GND

1A3

1A4

VCCA(1.8V-2.5V)

1A5

1A6

GND

1A7

1A8

2A1

2A2

GND

2A3

2A4

VCCA(1.8V-2.5V)

2A5

2A6

GND

2A7

2A8

2OE(LVTTL)

1DIR

1

48

47

2

1OE

1B1

1B2

GND

1B3

1B4

(3.3V)VCCB

1B5

1A1

1B1

1B6

GND

1B7

1B8

2B1

2B2

GND

2B3

2B4

(3.3V)VCCB

2B5

To Seven Other Channels

2DIR 24

25

36

13

2OE

48-Pin

A, K, V

38

37

36

35

34

33

32

31

30

29

28

27

26

25

2A1

2B1

2B6

GND

2B7

To Seven Other Channels

2B8

(LVTTL)2DIR

1

PS8425D

04/05/02