74LS273 datasheet(2/8 Pages) ONSEMI

Part #	74LS273

Description	LOW POWER SCHOTTKY

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SN74LS273

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2

18

17

16

15

14

13

12

3

4

5

6

7

20

19

8

VCC

MR

Q7

D7

D6

Q6

D5

Q5

D4

Q0

D0

D1

Q1

Q2

D2

D3

910

Q3 GND

12

11

Q4

CP

CONNECTION DIAGRAM DIP (TOP VIEW)

Clock (Active HIGH Going Edge) Input

Data Inputs

Master Reset (Active LOW) Input

Register Outputs

CP

D0 – D7

MR

Q0 – Q7

0.5 U.L.

10 U.L.

0.25 U.L.

5 U.L.

NOTES:

a) 1 TTL Unit Load (U.L.) = 40

mA HIGH/1.6 mA LOW.

HIGH

LOW

(Note a)

LOADING

PIN NAMES

TRUTH TABLE

MR

CP

Dx

Qx

L

X

L

H

L

H = HIGH Logic Level

L = LOW Logic Level

X = Immaterial

LOGIC DIAGRAM

CP

MR

D0

D1

D2

D3

D4

D5

D6

D7

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

CP D

CD Q

CP D

CD Q

CP D

CD Q

CP D

CD Q

CP D

CD Q

CP D

CD Q

CP D

CD Q

CP D

CD Q

14

1

26

7

3

8

4

5

9

11

12

13

15

VCC = PIN 20

GND = PIN 10

= PIN NUMBERS

17

18

16

19

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