74HC_HCT257_5

© NXP B.V. 2010. All rights reserved.

Product data sheet

Rev. 05 — 13 January 2010

7 of 17

NXP Semiconductors

74HC257; 74HCT257

Quad 2-input multiplexer; 3-state

10. Dynamic characteristics

OFF-state

output current

-

-

±0.5

-

80

-

160

μA

supply current

-

-

8.0

μA

ΔI

CC

additional supply

current

per input pin; nI0, nI1 inputs

-

40

144

-

180

-

196

μA

per input pin; OE input

-

135

486

-

608

-

662

μA

per input pin; S input

-

70

252

-

315

-

343

μA

input capacitance

-

3.5

-

pF

Table 6.

At recommended operating conditions; voltages are referenced to GND (ground = 0 V).

Symbol Parameter

Conditions

25

°C

−40 °C to

+85

°C

−40 °C to

+125

°C

Unit

Min

Typ

Max

Min

Max

Min

Max

Table 7.

Dynamic characteristics

Voltages are referenced to GND (ground = 0 V); For test circuit see Figure 8.

Symbol Parameter

Conditions

25

°C

−40 °C to

+85

°C

−40 °C to

+125

°C

Unit

Typ

Max

Max

Max

74HC257

propagation delay

nl0 to nY or nl1 to nY;

see Figure 6

[1]

36

110

140

165

ns

13

22

28

33

ns

11

-

-

-

ns

10

19

24

28

ns

S to nY; see Figure 6

47

150

190

225

ns

17

30

38

45

ns

14

-

-

-

ns

14

26

33

38

ns

enable time

OE to nY; see Figure 7

[2]

33

150

190

225

ns

12

30

38

45

ns

10

26

33

38

ns

disable time

OE to nY; see Figure 7

[3]

41

150

190

225

ns

15

30

38

45

ns

12

26

33

38

ns