HD74LS273RP 查看數據表（PDF） - Renesas Electronics

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HD74LS273RP

Octal D-type Positive-edge-triggered Flip-Flops (with Clear)

Renesas Electronics 

HD74LS273

Function Table

Inputs

Clear

Clock

D

L

X

X

H

↑

H

H

↑

L

H

L

X

Notes: H; high level, L; low level, X; irrelevant

↑; transition from low to high level

Q0; level of Q before the indicated steady-state input conditions were established.

Block Diagram

1D

2D

3D

4D

5D

6D

7D

Output

Q

L

H

L

Q0

8D

Clock (1)

Clear (2)

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

DQ

CK

Clear

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

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

Data setup time

Clear (inactive-state) setup time

Data hold time

Symbol

VCC

IOH

IOL

Topr

ƒclock

tw (clock)

tw (clear)

tsu (data)

tsu (clear)

th (data)

Min

4.75

—

—

–20

0

20

20

20↑

25↑

5↑

Typ

5.00

—

—

25

—

—

—

—

—

—

Max

5.25

–400

8

75

30

—

—

—

—

—

Unit

V

V

mW

°C

Unit

V

µA

mA

°C

MHz

ns

ns

ns

ns

ns

Rev.3.00, Jul.15.2005, page 2 of 6

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