Nexperia

74AXP2T45

2-bit dual supply translating transceiver; 3-state

11. Dynamic characteristics

Table 10. Typical dynamic characteristics at VCC(A) = 0.9 V and Tamb = 25 °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)

Symbol Parameter

Conditions

0.9 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

5.0 V

Unit

nA to nB

[1]

40

22

18.5

16.5

15

15

15

ns

tpd

propagation delay

nB to nA

[1]

40

33

32

31

31

31

32

ns

DIR to nA

[1]

34

34

34

34

34

34

34

ns

tdis

disable time

DIR to nB

[1]

42

30

26

26

24

25

23

ns

DIR to nA

[1]

82

63

58

57

55

56

55

ns

ten

enable time

DIR to nB

[1]

74

56

53

51

49

49

49

ns

[1] tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH.

Table 11. Typical dynamic characteristics at VCC(B) = 0.9 V and Tamb = 25 °C

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

VCC(A)

Symbol Parameter

Conditions

0.9 V

1.2 V

1.5 V

1.8 V

2.5 V

3.3 V

5.0 V

Unit

nA to nB

[1]

40

33

32

31

31

31

32

ns

tpd

propagation delay

nB to nA

[1]

40

22

18.5

16.5

15

15

15

ns

DIR to nA

[1]

34

16

11

10

7.0

7.7

5.3

ns

tdis

disable time

DIR to nB

[1]

42

31

28

28

27

27

27

ns

DIR to nA

[1]

82

53

47

45

42

42

42

ns

ten

enable time

DIR to nB

[1]

74

49

43

41

38

39

37

ns

[1] tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH.

Table 12. Typical dynamic characteristics at Tamb = 25 °C

[1][2] Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 7.

VCC(A) and VCC(B)

Symbol Parameter

Conditions

0.9 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V

Unit

A port: (direction nA to nB);

B port: (direction nB to nA)

1.5

1.6

1.7

1.8

1.9

2.2

2.7 pF

CPD

power dissipation

capacitance

A port: (direction nB to nA);

B port: (direction nA to nB)

9.7

10.2 10.3 10.4 10.7

11

11.9 pF

CI

input capacitance VI = 0 V or VCCI; VCCI = 0 V to 5.5 V 1.4

1.4

1.4

1.4

1.4

1.4

1.4 pF

CI/O

input/output

capacitance

VO = 0 V; VCCO = 0 V

4.4

4.4

4.4

4.4

4.4

4.4

4.4 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 = 1 MHz; VI = GND to VCC; tr = tf = 1 ns; CL = 0 pF; RL = ∞ Ω.

74AXP2T45

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© Nexperia B.V. 2022. All rights reserved

Product data sheet

Rev. 2 — 23 June 2022

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