Nexperia

74LVC138A

3-to-8 line decoder/demultiplexer; inverting

10. Dynamic characteristics

Table 7. Dynamic characteristics

Voltages are referenced to GND (ground = 0 V). For test circuit see Fig. 9.

-40 °C to +85 °C

-40 °C to +125 °C

Symbol Parameter

Conditions

Min

Typ [1]

Max

Min

Max

Unit

An to Yn; see Fig. 7

[2]

VCC = 1.2 V

-

14

-

-

-

ns

VCC = 1.65 V to 1.95 V

0.5

5.2

11.5

0.5

12.7

ns

VCC = 2.3 V to 2.7 V

1.5

3.0

6.5

1.5

7.3

ns

VCC = 2.7 V

1.5

3.2

6.8

1.5

8.5

ns

VCC = 3.0 V to 3.6 V

1.0

2.7

5.8

1.0

7.5

ns

E3 to Yn; see Fig. 7

[2]

VCC = 1.2 V

-

14

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.0

5.5

11.4

1.0

12.5

ns

VCC = 2.3 V to 2.7 V

1.5

3.2

6.5

1.5

7.1

ns

VCC = 2.7 V

1.5

3.3

6.8

1.5

8.5

ns

VCC = 3.0 V to 3.6 V

1.0

2.9

5.8

1.0

7.5

ns

En to Yn; see Fig. 8

[2]

VCC = 1.2 V

-

15

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.0

5.6

11.5

1.0

12.8

ns

VCC = 2.3 V to 2.7 V

1.8

3.3

6.5

1.8

7.3

ns

VCC = 2.7 V

1.5

3.4

6.4

1.5

8.0

ns

tpd

propagation delay

VCC = 3.0 V to 3.6 V

1.0

2.9

5.8

1.0

7.5

ns

tsk(o)

output skew time

[3]

-

-

1.0

-

1.5

ns

VI = GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

9.9

-

-

-

pF

VCC = 2.3 V to 2.7 V

-

15.8

-

-

-

pF

CPD

power dissipation

capacitance

VCC = 3.0 V to 3.6 V

-

21.1

-

-

-

pF

[1] Typical values are measured at Tamb = 25 °C and VCC = 1.2 V, 1.8 V, 2.5 V, 2.7 V, and 3.3 V respectively.

[2] tpd is the same as tPLH and tPHL.

[3] Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

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

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

fi = input frequency in MHz; fo = output frequency in MHz

CL = output load capacitance in pF

VCC = supply voltage in V

N = number of inputs switching

∑(CL × VCC 2 × fo) = sum of outputs

74LVC138A

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 8 — 20 September 2021

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