HD74LS390 Просмотр технического описания (PDF) - Renesas Electronics

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Компоненты Описание

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HD74LS390

Dual Decade Counters

Renesas Electronics 

HD74LS390

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol min. typ.* max. Unit

Condition

Input voltage

Output voltage

Clear

VIH

2.0

—

—

V

VIL

—

—

0.7

V

VOH

2.7

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.7 V,

IOH = –400 µA

VOL

—

—

0.4

V

IOL = 4 mA VCC = 4.75 V,

—

—

0.5

IOL = 8 mA VIH = 2 V, VIL = 0.7 V

—

—

20

Input A

Input B

IIH

—

—

100

µA VCC = 5.25 V, VI = 2.7 V

—

—

200

Input

current

Clear

Input A

Input B

—

—

–0.4

IIL

—

—

–1.6

mA VCC = 5.25 V, VI = 0.4 V

—

—

–2.4

Clear

Input A

Input B

—

—

0.1

VI = 7 V

II

—

—

—

—

0.2

0.4

mA

VI = 5.5 V VCC = 5.25 V

Short-circuit output current

IOS

–20

—

–100

mA VCC = 5.25 V

Supply current

ICC

—

15

26

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

** ICC is measured with all outputs open, both Clear 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

A

frequency

ƒmax

B

QA

25

35

—

MHz

QB

20

30

—

tPLH

A

tPHL

QA

—

12

20

ns

—

13

20

tPLH

A

tPHL

Propagation delay

tPLH

B

time

tPHL

QC

QB

—

37

60

ns

—

39

60

—

13

21

CL = 15 pF,

ns

RL = 2 kΩ

—

14

21

tPLH

B

tPHL

QC

—

24

39

ns

—

26

39

tPLH

B

tPHL

QD

—

13

21

ns

—

14

21

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.4.00, May 10, 2006, page 4 of 5

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