HD74LS161AFP 查看數據表（PDF） - Renesas Electronics

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HD74LS161AFP

Synchronous 4-bit Binary Counter (direct clear)

Renesas Electronics 

HD74LS161A

Absolute Maximum Ratings

Item

Symbol

Ratings

Supply voltage

VCC

7

Input voltage

VIN

7

Power dissipation

PT

400

Storage temperature

Tstg

–65 to +150

Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.

Recommended Operating Conditions

Item

Supply voltage

Output current

Operating temperature

Clock frequency

Clock pulse width

Clear pulse width

A, B, C, D

Setup time

Enable P, T

Load

Hold time

Symbol

VCC

IOH

IOL

Topr

ƒclock

tw (clock)

tw (clear)

tsu

th

Min

4.75

—

—

–20

0

25

20

20

20

20

3

Typ

5.00

—

—

25

—

—

—

—

—

—

—

Max

5.25

–400

8

75

25

—

—

—

—

—

—

Typical Clear, Preset, and Inhibit Sequence

Clear

Load

A

Data

B

Inputs

C

D

Clock

Enable P

Enable T

QA

QB

Outputs

QC

QD

Carry

Clear

12 13 14 15 0 1 2

Count

Preset

(Load)

Inhibit

Unit

V

V

mW

°C

Unit

V

µA

mA

°C

MHz

ns

ns

ns

ns

ns

ns

Rev.2.00, Feb.18.2005, page 3 of 10

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