HD74LS161AFP 查看數據表（PDF） - Renesas Electronics

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HD74LS161AFP

Synchronous 4-bit Binary Counter (direct clear)

Renesas Electronics 

HD74LS161A

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol min. typ.* max. Unit

Condition

Input voltage

Output voltage

Data, Enable P

VIH

2.0

—

—

V

VIL

—

—

0.8

V

VOH

2.7

—

—

V

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

IOH = –400 µA

VOL

—

—

0.4

V

IOL = 4 mA VCC = 4.75 V, VIH = 2 V,

—

—

0.5

IOL = 8 mA VIL = 0.8 V

—

—

20

Load, Clock, Enable T

IIH

Clear

—

—

40

µA VCC = 5.25 V, VI = 2.7 V

—

—

20

Data, Enable P

Input

current Load, Clock, Enable T

IIL

Clear

—

— –0.4

—

— –0.8 mA VCC = 5.25 V, VI = 0.4 V

—

–0.4

Data, Enable P

—

—

0.1

Load, Clock, Enable T

II

Clear

—

—

0.2

mA VCC = 5.25 V, VI = 7 V

—

—

0.1

Short-circuit output current

IOS

–20

— –100 mA VCC = 5.25 V

Supply current**

ICCH

—

18

31

mA VCC = 5.25 V

ICCL

—

19

32

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

** ICCH is measured with the load input high, then again with the load input low, with all other inputs high and all

outputs open. ICCL is measured with the clock input high, then again with the clock input low, with all other

inputs low and all outputs open.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Inputs

Outputs min. typ. max. Unit Condition

Maximum clock frequency

ƒmax

Clock

QA to QD

25

32

—

MHz

tPLH

Clock

Ripple

—

20

35

ns

tPHL

Carry

—

18

35

ns

Propagation delay time

tPLH

tPHL

Clock

(Load = “H”) QA to QD

—

—

13

18

24

27

ns

ns CL = 15 pF,

tPLH

tPHL

Clock

(Load = “L”) QA to QD

—

—

13

18

24

27

ns RL = 2 kΩ

ns

tPLH

Enable T

Ripple

—

9

14

ns

tPHL

Carry

—

9

14

ns

tPHL

Clear

QA to QD

—

20

28

ns

Rev.2.00, Feb.18.2005, page 4 of 10

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