Nexperia

74LVC1T45; 74LVCH1T45

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). [1][2]

VCC(A) and VCC(B)

Symbol Parameter

Conditions

1.8 V

2.5 V

3.3 V

5.5 V

Unit

A port: (direction A to B);

B port: (direction B to A)

2

3

3

4

pF

CPD

power dissipation

capacitance

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. 8; for wave forms see Fig. 6 and Fig. 7.

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_LVCH1T45

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© Nexperia B.V. 2022. All rights reserved

Product data sheet

Rev. 9 — 10 February 2022

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