Nexperia

74LVC244A; 74LVCH244A

Octal buffer/line driver; 3-state

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

nAn to nYn; see Fig. 7

[2]

VCC = 1.2 V

-

17.0

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.5

6.4

13.7

1.5

15.8

ns

VCC = 2.3 V to 2.7 V

1.0

3.4

7.1

1.0

8.2

ns

VCC = 2.7 V

1.5

3.4

6.9

1.5

9.0

ns

tpd

propagation delay

VCC = 3.0 V to 3.6 V

1.5

2.9

5.9

1.5

7.5

ns

nOE to nYn; see Fig. 8

[2]

VCC = 1.2 V

-

24.0

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.5

7.0

17.3

1.5

20.0

ns

VCC = 2.3 V to 2.7 V

1.5

3.9

9.5

1.5

11.0

ns

VCC = 2.7 V

1.5

4.1

8.6

1.5

11.0

ns

ten

enable time

VCC = 3.0 V to 3.6 V

1.0

3.2

7.6

1.0

9.5

ns

nOE to nYn; see Fig. 8

[2]

VCC = 1.2 V

-

9.0

-

-

-

ns

VCC = 1.65 V to 1.95 V

2.2

4.5

9.8

2.2

11.3

ns

VCC = 2.3 V to 2.7 V

0.5

3.6

5.5

0.5

6.4

ns

VCC = 2.7 V

1.5

3.3

6.8

1.5

8.5

ns

tdis

disable time

VCC = 3.0 V to 3.6 V

1.5

3.1

5.8

1.5

7.5

ns

tsk(o)

output skew time

[3]

-

-

1.0

-

1.5

ns

per input; VI = GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

6.4

-

-

-

pF

VCC = 2.3 V to 2.7 V

-

9.6

-

-

-

pF

CPD

power dissipation

capacitance

VCC = 3.0 V to 3.6 V

-

12.5

-

-

-

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.

ten is the same as tPZL and tPZH.

tdis is the same as tPLZ and tPHZ.

[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 + Σ(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 Volts

N = number of inputs switching

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

74LVC_LVCH244A

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Product data sheet

Rev. 12 — 16 September 2021

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