Nexperia

74AVC2T45

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

11. Dynamic characteristics

Table 9. Typical dynamic characteristics at VCC(A) = 0.8 V and Tamb = 25 °C

Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 8; for waveforms see Fig. 6 and Fig. 7

VCC(B)

Symbol Parameter

Conditions

0.8 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

Unit

A to B

[1] 15.5

8.1

7.6

7.7

8.4

9.2

ns

tpd

propagation delay

B to A

[1] 15.5

12.7

12.3

12.2

12.0

11.8

ns

DIR to A

[2] 12.2

12.2

12.2

12.2

12.2

12.2

ns

tdis

disable time

DIR to B

[2] 11.7

7.9

7.6

8.2

8.7

10.2

ns

DIR to A

[3] 27.2

20.6

19.9

20.4

20.7

22.0

ns

ten

enable time

DIR to B

[3] 27.7

20.3

19.8

19.9

20.6

21.4

ns

[1] tpd is the same as tPLH and tPHL

[2] tdis is the same as tPLZ and tPHZ

[3] ten is the same as tPZL and tPZH

ten is a calculated value using the formula shown in Section 12.4

Table 10. Typical dynamic characteristics at VCC(B) = 0.8 V and Tamb = 25 °C

Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 8; for waveforms see Fig. 6 and Fig. 7

VCC(A)

Symbol Parameter

Conditions

0.8 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

Unit

A to B

[1] 15.5

12.7

12.3

12.2

12.0

11.8

ns

tpd

propagation delay

B to A

[1] 15.5

8.1

7.6

7.7

8.4

9.2

ns

DIR to A

[2] 12.2

4.9

3.8

3.7

2.8

3.4

ns

tdis

disable time

DIR to B

[2] 11.7

9.2

9.0

8.8

8.7

8.6

ns

DIR to A

[3] 27.2

17.3

16.6

16.5

17.1

17.8

ns

ten

enable time

DIR to B

[3] 27.7

17.6

16.1

15.9

14.8

15.2

ns

[1] tpd is the same as tPLH and tPHL

[2] tdis is the same as tPLZ and tPHZ

[3] ten is the same as tPZL and tPZH

ten is a calculated value using the formula shown in Section 12.4

Table 11. Typical power dissipation capacitance at VCC(A) = VCC(B) and Tamb = 25 °C

Voltages are referenced to GND (ground = 0 V).

VCC(A) and VCC(B)

Symbol Parameter

Conditions

0.8 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

Unit

[1][2]

A port: (direction A to B);

B port: (direction B to A)

1

2

2

2

2

2

pF

CPD

power dissipation

capacitance

A port: (direction B to A);

B port: (direction A to B)

9

11

11

12

14

17

pF

[1] CPD is used to determine the dynamic power dissipation (PD in μW).

PD = CPD x VCC 2 x fi x N + ∑(CL x VCC 2 x fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = load capacitance in pF;

VCC = supply voltage in V;

N = number of inputs switching;

Σ(CL x VCC 2 x fo) = sum of the outputs.

[2] fi = 10 MHz; VI = GND to VCC; tr = tf = 1 ns; CL = 0 pF; RL = ∞ Ω.

74AVC2T45

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 10 — 4 November 2021

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