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PI74AVC164245AVE

16-Bit 1.8-2.5V to 3.3V Level Shifting Transceiver with 3-State Outputs

Pericom Semiconductor Corporation 

PI74AVC164245

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

Transceiver with 3-State Outputs

Features

• PI74AVC164245 is designed for low voltage operation:

1.8V - 2.5V to 3.3V

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

• Packaging (Pb-free & Green available):

– 48-pin plastic 300-mil SSOP (V)

– 48-pin plastic 240-mil TSSOP (A)

– 48-pin plastic 173-mil TVSOP (K)

Truth Table (each 8-bit section)

Inputs

OE

DIR

L

L

L

H

H

X

Operation

B data to A bus

A data to B bus

Isolation

Description

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

noninverting bus transceiver, contains two separate supply rails:

B port (VCCB), set at 3.3V, and A port (VCCA), 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.

To ensure the high impedance state during power up or power

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

1DIR 1

1A1 47

2DIR 24

2A1 36

48 1OE

To Seven Other Channels

2 1B1

25 2OE

To Seven Other Channels

13 2B1

(3.3V LVTTL) 1DIR 1

1B1 2

1B2 3

GND 4

1B3 5

1B4 6

(3.3V) VCCB 7

1B5 8

1B6 9

GND 10

1B7 11

1B8 12

2B1 13

2B2 14

GND 15

2B3 16

2B4 17

(3.3V) VCCB 18

2B5 19

2B6 20

GND 21

2B7 22

2B8 23

(3.3V LVTTL) 2DIR 24

48 1OE (3.3V LVTTL)

47 1A1

46 1A2

45 GND

44 1A3

43 1A4

42 VCCA (1.8V-2.5V)

41 1A5

40 1A6

39 GND

38 1A7

37 1A8

36 2A1

35 2A2

34 GND

33 2A3

32 2A4

31 VCCA (1.8V-2.5V)

30 2A5

29 2A6

28 GND

27 2A7

26 2A8

25 2OE (3.3V LVTTL)

09-0023

1

PS8425G 08/12/09

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