SN54-74LS168 查看數據表（PDF） - ON Semiconductor

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SN54-74LS168

BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

ON Semiconductor 

SN54/74LS168 • SN54/74LS169

AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)

Limits

Symbol

Parameter

Min Typ Max

fMAX

Maximum Clock Frequency

25

32

tPLH

tPHL

Propagation Delay,

Clock to TC

23

35

23

35

tPLH

tPHL

Propagation Delay,

Clock to any Q

13

20

15

23

tPLH

tPHL

Propagation Delay,

CET to TC

15

20

15

20

tPLH

tPHL

Propagation Delay,

U / D to TC

17

25

19

29

AC SETUP REQUIREMENTS (TA = 25°C)

Symbol

tW

ts

ts

ts

th

Parameter

Clock Pulse Width

Setup Time,

Data or Enable

Setup Time

PE

Setup Time

U/D

Hold Time

Any Input

Limits

Min Typ Max

25

20

25

30

0

Unit

MHz

ns

ns

ns

ns

Unit

ns

ns

ns

ns

ns

Test Conditions

VCC = 5.0 V

CL = 15 pF

Test Conditions

VCC = 5.0 V

FAST AND LS TTL DATA

5-5

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