Nexperia

74LVC2T45; 74LVCH2T45

Dual supply translating transceiver; 3-state

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

1.8 V

2.5 V

3.3 V

5.0 V

Unit

A port: (direction A to B);

B port: (direction B to A)

2

3

3

4

pF

CPD

power dissipation

capacitance[1] [2]

A port: (direction B to A);

B port: (direction A to B)

15

16

16

18

pF

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

PD = CPD × VCC 2 × fi × N + Σ(CL × VCC 2 × 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 × VCC 2 × fo) = sum of the outputs.

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

Table 12. Dynamic characteristics for temperature range -40 °C to +85 °C

Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 7; for waveforms see Fig. 5 and Fig. 6.

VCC(B)

1.5 V ± 0.1 V 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 5.0 V ± 0.5 V

Symbol Parameter

Conditions

Min Max

Min

Max

Min Max Min Max Min Max

Unit

VCC(A) = 1.4 V to 1.6 V

A to B

2.8

21.3

2.4

17.6

2.0

13.5

1.7

11.8

1.6

10.5 ns

tPLH

LOW to HIGH

propagation delay

B to A

2.8

21.3

2.6

19.1

2.3

14.9

2.3

12.4

2.2

12.0 ns

A to B

2.6

19.3

2.2

15.3

1.8

11.8

1.7

10.9

1.7

10.8 ns

tPHL

HIGH to LOW

propagation delay

B to A

2.6

19.3

2.4

17.3

2.3

13.2

2.2

11.3

2.3

11.0 ns

DIR to A

3.0

18.7

3.0

18.7

3.0

18.7

3.0

18.7

3.0

18.7 ns

tPHZ

HIGH to OFF-state

propagation delay

DIR to B

3.5

24.8

3.5

23.6

3.0

11.0

3.3

11.3

2.8

10.3 ns

DIR to A

2.4

11.4

2.4

11.4

2.4

11.4

2.4

11.4

2.4

11.4 ns

tPLZ

LOW to OFF-state

propagation delay

DIR to B

2.8

18.3

3.0

17.2

2.5

9.4

3.0

10.1

2.5

9.4 ns

DIR to A [1]

-

39.6

-

36.3

-

24.3

-

22.5

-

21.4 ns

tPZH

OFF-state to HIGH

propagation delay

DIR to B [1]

-

32.7

-

29.0

-

24.9

-

23.2

-

21.9 ns

DIR to A [1]

-

44.1

-

40.9

-

24.2

-

22.6

-

21.3 ns

tPZL

OFF-state to LOW

propagation delay

DIR to B [1]

-

38.0

-

34.0

-

30.5

-

29.6

-

29.5 ns

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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