PI3VT34X245B Просмотр технического описания (PDF) - Pericom Semiconductor

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PI3VT34X245B

32-Bit, 2-Port, Low Voltage Translator Bus Switch

Pericom Semiconductor 

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32-Bit, 2-Port, Low Voltage

Translator Bus Switch

Product Features

• Near zero propagation delay

• Low ON resistance switches connect inputs to outputs

• 2.5V to 3.3V Supply Voltage Operation

• 2.5V or 1.8V switching

• Packages available:

– 80-pin, 150 mil wide plastic BQSOP (B)

Applications

• 3.3V to 2.5V level shifting (voltage translation)

• 2.5V to 1.8V level shifting (voltage translation)

Product Description

Pericom Semiconductor’s PI3VT series of logic circuits are produced

using the Company’s advanced submicron CMOS technology,

achieving industry leading performance.

The PI3VT34X245, either a 2.5V or 3.3V 32-bit, 2-port bus switch,

is designed with a low ON resistance (5 ohms). The switches are

turned ON or enabled by the Bus Enable (BEn) input signal.

Given a 3.3V supply and an input voltage of 3.3V, the switch

translates to an output voltage of 2.5V. Similarly, when operated with

a 2.5V supply and given 2.5V inputs, the device translates the

outputs to 1.8V.

Logic Block Diagram

A0

A7

BE1

A8

A15

BE2

A16

A23

BE3

A24

A31

BE4

B0

B7

B8

B15

B16

B23

B24

B31

Product Pin Configuration

NC 1

80 VCC

A0 2

79 BE1

A1 3

78 B0

A2 4

77 B1

A3 5

76 B2

A4 6

75 B3

A5 7

74 B4

A6 8

73 B5

A7 9

72 B6

GND 10

71 B7

NC 11

70 VCC

A8 12

69 BE2

A9 13

68 B8

A10 14

67 B9

A11 15

66 B10

A12 16 80-Pin 65 B11

A13 17

B

64 B12

A14 18

63 B13

A15 19

62 B14

GND 20

61 B15

NC 21

60 VCC

A16 22

59 BE3

A17 23

58 B16

A18 24

57 B17

A19 25

56 B18

A20 26

55 B19

A21 27

54 B20

A22 28

53 B21

A23 29

52 B22

GND 30

51 B23

NC 31

50 VCC

A24 32

49 BE4

A25 33

48 B24

A26 34

47 B25

A27 35

46 B26

A28 36

45 B27

A29 37

44 B28

A30 38

43 B29

A31 39

42 B30

GND 40

41 B31

1

PS8531A

12/12/01

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