74AVC2T45 datasheet(21/28 Pages) NXP

21 / 28 page

74AVC2T45_1

Product data sheet

Rev. 01 — 3 July 2007

21 of 28

NXP Semiconductors

74AVC2T45

Dual-bit, dual-supply voltage level translator/transceiver; 3-state

13. Application information

13.1 Unidirectional logic level-shifting application

The circuit given in Figure 8 is an example of the 74AVC2T45 being used in an

unidirectional logic level-shifting application.

Fig 8.

Unidirectional logic level-shifting application

Table 11.

Unidirectional logic level-shifting application

Name

Function

Description

1VCC(A)

VCC1

supply voltage of system-1 (0.8 V to 3.6 V)

OUT1

output level depends on VCC1 voltage

OUT2

output level depends on VCC1 voltage

GND

device GND

DIR

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

IN2

input threshold value depends on VCC2 voltage

IN1

input threshold value depends on VCC2 voltage

8VCC(B)

VCC2

supply voltage of system-2 (0.8 V to 3.6 V)

74AVC2T45

VCC(A)

VCC1

VCC2

VCC(B)

system-1

GND

DIR

001aag581

system-2

VCC2

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