74HC257N datasheet(5/13 Pages) PHILIPS

部件名	74HC257N

功能描述	Quad 2-input multiplexer 3-state

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制造商	PHILIPS [NXP Semiconductors]

网页	http://www.nxp.com

标志

5 / 13 page

1998 Sep 30

5

Philips Semiconductors

Product speciﬁcation

Quad 2-input multiplexer; 3-state

74HC/HCT257

DC CHARACTERISTICS FOR 74HC

For the DC characteristics see

“74HC/HCT/HCU/HCMOS Logic Family Specifications”.

Output capability: bus driver

ICC category: MSI

AC CHARACTERISTICS FOR 74HC

GND = 0 V; tr =tf = 6 ns; CL = 50 pF

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HC

VCC

(V)

WAVEFORMS

+25

−40 to +85 −40 to +125

min.

typ. max. min. max.

min.

max.

tPHL/ tPLH propagation delay

nI0 to nY;

nI1 to nY

36

110

140

165

ns

2.0

Fig.6

13

22

28

33

4.5

10

19

24

28

6.0

tPHL/ tPLH propagation delay

S to nY

47

150

190

225

ns

2.0

Fig.6

17

30

38

45

4.5

14

26

33

38

6.0

tPZH/ tPZL 3-state output enable time

OE to nY

33

150

190

225

ns

2.0

Fig.7

12

30

38

45

4.5

10

26

33

38

6.0

tPHZ/ tPLZ 3-state output disable time

OE to nY

41

150

190

225

ns

2.0

Fig.7

15

30

38

45

4.5

12

26

33

38

6.0

tTHL/ tTLH output transition time

14

60

75

90

ns

2.0

Fig.6

5

12

15

18

4.5

4

10

13

15

6.0

类似零件编号 - 74HC257N

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NXP Semiconductors	74HC257N	185Kb / 17P	Quad 2-input multiplexer; 3-state Rev. 05-13 January 2010

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类似说明 - 74HC257N

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