HD74LS393 查看數據表（PDF） - Renesas Electronics

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HD74LS393

Dual 4-bit Binary Counters

Renesas Electronics 

HD74LS393

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs Outputs min. typ. max. Unit Condition

Maximum count frequency

ƒmax

A

QA

25

35

—

MHz

Propagation delay time

tPLH

tPHL

A

—

12

20

QA

ns

—

13

20

CL = 15 pF,

tPLH

tPHL

A

—

40

60

RL = 2 kΩ

QD

ns

—

40

60

tPHL

Clear

Any

—

24

39

ns

Note: Refer to Test Circuit and Waveform of the Common Item "TTL Common Matter (Document No.: REJ27D0005-

0100)".

Rev.2.00, Feb.18.2005, page 4 of 6

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