HD74LS93 查看數據表（PDF） - Renesas Electronics

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HD74LS93

4-bit Binary Counter

Renesas Electronics 

HD74LS93

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol

min.

typ.* max.

Unit

Condition

Input voltage

VIH

2.0

—

—

V

VIL

—

—

0.8

V

Output voltage

VOH

2.7

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –400 µA

VOL

—

—

—

0.4

—

0.5

V

IOL = 4 mA**

IOL = 8 mA**

VCC = 4.75 V, VIH = 2 V,

VIL = 0.8 V

Any reset

—

—

–0.4

A input

B input

IIL

—

—

–2.4

mA VCC = 5.25 V, VI = 0.4 V

—

—

–1.6

Any reset

Input

current A input

IIH

B input

—

—

20

—

—

40

µA VCC = 5.25 V, VI = 2.7 V

—

—

40

Any reset

—

—

0.1

VI = 7 V

A input

II

—

—

0.2

mA VI = 5.5 V

VCC = 5.25 V

B input

—

—

0.2

VI = 5.5 V

Short-circuit output

current

IOS

–20

—

–100

mA VCC = 5.25 V

Supply current

ICC***

—

9

15

mA VCC = 5.25 V

Input clamp voltage

VIK

—

—

–1.5

V

VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** QA output is tested at specified IOL plus the limit value of IIL for the B input. This permits driving the B input

while maintaining full fan-out capability.

*** ICC is measured with all outputs open, both R0 inputs grounded following momentary connection to 4.5 V, and

all other inputs grounded.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs Outputs min. typ. max. Unit

Condition

Maximum count frequency

fmax

A

QA

32

42

—

MHz

B

QB

16

—

—

tPLH

A

tPHL

—

10

16

QA

—

12

18

tPLH

tPHL

A

—

46

70

QD

—

46

70

Propagation delay time

tPLH

B

tPHL

QB

—

10

16

CL = 15 pF,

RL = 2 kΩ

—

14

21

ns

tPLH

tPHL

B

—

21

32

QC

—

23

35

tPLH

tPHL

B

—

34

51

QD

—

34

51

tPHL

Set-to-0 QA to QD —

26

40

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 8

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