Nexperia

74LVC257A

Quad 2-input multiplexer with 5 V tolerant inputs/outputs; 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

nI0, nI1 to nY; see Fig. 7

[2]

VCC = 1.2 V

-

16

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.5

5.2

10.6

1.5

12.3

ns

VCC = 2.3 V to 2.7 V

1.0

2.8

5.5

1.0

6.4

ns

VCC = 2.7 V

1.0

2.8

5.4

1.0

7.0

ns

VCC = 3.0 V to 3.6 V

1.0

2.4

4.6

1.0

6.0

ns

S to nY; see Fig. 7

[2]

VCC = 1.2 V

-

18

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.0

6.0

14.8

1.0

17.1

ns

VCC = 2.3 V to 2.7 V

1.0

3.2

7.7

1.0

8.9

ns

VCC = 2.7 V

1.0

3.2

7.5

1.0

9.5

ns

tpd

propagation delay

VCC = 3.0 V to 3.6 V

1.0

2.7

6.4

1.0

8.0

ns

OE to nY; see Fig. 8

[2]

VCC = 1.2 V

-

15

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.5

5.8

12.7

1.5

14.7

ns

VCC = 2.3 V to 2.7 V

1.5

3.3

7.0

1.5

8.1

ns

VCC = 2.7 V

1.5

3.4

6.7

1.5

8.5

ns

ten

enable time

VCC = 3.0 V to 3.6 V

1.0

2.7

5.6

1.0

7.0

ns

OE to nY; see Fig. 8

[2]

VCC = 1.2 V

-

8

-

-

-

ns

VCC = 1.65 V to 1.95 V

2.2

4.0

8.2

2.2

9.4

ns

VCC = 2.3 V to 2.7 V

0.5

2.2

4.4

0.5

5.1

ns

VCC = 2.7 V

1.5

3.0

4.7

1.5

6.0

ns

tdis

disable time

VCC = 3.0 V to 3.6 V

1.0

2.8

4.3

1.0

5.5

ns

tsk(o)

output skew time

VCC = 3.0 V to 3.6 V

[3]

-

-

1.0

-

1.5

ns

per input; VI = GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

8.0

-

-

-

pF

VCC = 2.3 V to 2.7 V

-

11.4

-

-

-

pF

CPD

power dissipation

capacitance

VCC = 3.0 V to 3.6 V

-

14.4

-

-

-

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 x VCC 2 x fi x N + Σ(CL x VCC 2 x fo) where:

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

CL = output load capacitance in pF

VCC = supply voltage in Volt

N = number of inputs switching

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

74LVC257A

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© Nexperia B.V. 2021. All rights reserved

Product data sheet

Rev. 8 — 31 August 2021

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