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74LVC157A

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Product data sheet

Rev. 7 — 25 November 2011

7 of 17

Nexperia

74LVC157A

Quad 2-input multiplexer

10. Dynamic characteristics

[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 W).

PD =CPD  VCC2  fi  N+ (CL  VCC2  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

(C

L  VCC

2

 f

o) = sum of outputs

Table 7.

Dynamic characteristics

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

Symbol Parameter

Conditions

40 C to +85 C

40 C to +125 C Unit

Min

Typ[1]

Max

Min

Max

tpd

propagation delay

nI0, nI1 to nY; see Figure 8

[2]

VCC = 1.2 V

-

16

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.0

4.8

10.2

1.0

11.8

ns

VCC = 2.3 V to 2.7 V

1.5

2.8

5.8

1.5

6.7

ns

VCC = 2.7 V

1.0

2.9

5.9

1.0

7.5

ns

VCC = 3.0 V to 3.6 V

1.0

2.5

5.2

1.0

6.5

ns

E to nY; see Figure 7

[2]

VCC = 1.2 V

-

17

-

-

-

ns

VCC = 1.65 V to 1.95 V

0.5

4.8

12.8

0.5

14.7

ns

VCC = 2.3 V to 2.7 V

1.5

2.8

7.2

1.5

8.3

ns

VCC = 2.7 V

1.0

2.9

7.8

1.0

10.0

ns

VCC = 3.0 V to 3.6 V

1.0

2.6

6.5

1.0

8.5

ns

S to nY; see Figure 8

[2]

VCC = 1.2 V

-

16

-

-

-

ns

VCC = 1.65 V to 1.95 V

1.0

5.1

12.4

1.0

14.3

ns

VCC = 2.3 V to 2.7 V

1.5

3.0

7.0

1.5

8.1

ns

VCC = 2.7 V

1.0

3.1

7.3

1.0

9.5

ns

VCC = 3.0 V to 3.6 V

1.0

2.7

6.3

1.0

8.0

ns

tsk(o)

output skew time

VCC = 3.0 V to 3.6 V

[3]

-

-

1.0

-

1.5

ns

CPD

power dissipation

capacitance

per input; VI = GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

9.4

-

-

-

pF

VCC = 2.3 V to 2.7 V

-

12.8

-

-

-

pF

VCC = 3.0 V to 3.6 V

-

15.9

-

-

-

pF