SN74LS109A

http://onsemi.com

2

LOGIC DIAGRAM

5(11)

1(15)

CLOCK

4(12)

J

2(14)

K

3(13)

Q

6(10)

Q

7(9)

LOGIC SYMBOL

GND = PIN 8

511

2

4

3

6

7

1

14

12

13

10

9

15

J

Q

CP

K

Q

J

Q

CP

K

Q

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage for

All Inputs

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

Input Clamp Diode Voltage

– 0.65

– 1.5

V

Output HIGH Voltage

2.7

3.5

V

Output LOW Voltage

0.25

0.4

V

Output LOW Voltage

0.35

0.5

V

per Truth Table

Input HIGH Current

J, K, Clock

Set, Clear

20

40

µA

IH

J, K, Clock

Set, Clear

0.1

0.2

mA

Input LOW Current

J, K, Clock

Set, Clear

– 0.4

– 0.8

mA

Output Short Circuit Current (Note 1)

–20

– 100

mA

Power Supply Current

8.0

mA

Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.