Nexperia

74LVC2T45; 74LVCH2T45

Dual supply translating transceiver; 3-state

13. Application information

13.1. Unidirectional logic level-shifting application

The circuit given in Fig. 14 is an example of the 74LVC2T45; 74LVCH2T45 being used in a

unidirectional logic level-shifting application.

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system-1

VCC(A)

1A

2A

GND

1

2

3

4

8

7

6

5

VCC(B)

1B

2B

DIR

74LVC2T45

74LVCH2T45

VCC1

VCC1

VCC2

VCC2

VCC1

VCC2

system-2

Fig. 14. Unidirectional logic level-shifting application

Table 16. Description of unidirectional logic level-shifting application

Pin

Name

Function

Description

1

VCC(A)

VCC1

supply voltage of system-1 (1.2 V to 5.5 V)

2

1A

OUT

output level depends on VCC1 voltage

3

2A

OUT

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

IN

input threshold value depends on VCC2 voltage

7

1B

IN

input threshold value depends on VCC2 voltage

8

VCC(B)

VCC2

supply voltage of system-2 (1.2 V to 5.5 V)

74LVC_LVCH2T45

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© Nexperia B.V. 2023. All rights reserved

Product data sheet

Rev. 12 — 1 March 2023

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