Nexperia

74AXP2T45

2-bit dual supply translating transceiver; 3-state

12. Application information

12.1. Unidirectional logic level-shifting application

The circuit given in Fig. 15 is an example of the 74AXP2T45 being used in an unidirectional logic

level-shifting application.

VCC1

VCC2

VCC1

system-1

VCC1

VCC2

VCC2

system-2

74AXP2T45

VCC(A)

VCC(B)

1A

1B

2A

2B

GND

DIR

aaa-029973

1

2

3

4

6

5

8

7

Fig. 15. Unidirectional logic level-shifting application

Table 17. Unidirectional logic level-shifting application

Pin

Name

Function

Description

1

VCC(A)

VCC1

supply voltage of system-1 (0.9 V to 5.5 V)

2

1A

OUT1

output level depends on VCC1 voltage

3

2A

OUT2

output level depends on VCC1 voltage

4

GND

GND

device GND

5

DIR

DIR

the GND (LOW level) determines B port to A port direction

6

2B

IN2

input threshold value depends on VCC2 voltage

7

1B

IN1

input threshold value depends on VCC2 voltage

8

VCC(B)

VCC2

supply voltage of system-2 (0.9 V to 5.5 V)

74AXP2T45

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Product data sheet

Rev. 2 — 23 June 2022

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