74279 ls

Page 1

SN54/74LS279 QUAD SET-RESET LATCH

VCC 16

S1 15

R

Q

14

13

S1 12

S2 11

R 10

Q 9

QUAD SET-RESET LATCH LOW POWER SCHOTTKY

1 R

2 S1

3 S2

4 Q

5 R

6 S1

7 Q

8 GND

J SUFFIX CERAMIC CASE 620-09 16

TRUTH TABLE INPUT

1

S1

S2

R

OUTPUT (Q)

L L X H H

L X L H H

L H H L H

h H H L No Change

N SUFFIX PLASTIC CASE 648-08

16 1

L = LOW Voltage Level H = HIGH Voltage Level X = Don’t Care h = The output is HIGH as long as h = S1 or S2 is LOW. If all inputs go h = HIGH simultaneously, the output h = state is indeterminate; otherwise, h = it follows the Truth Table

16 1

D SUFFIX SOIC CASE 751B-03

ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD

Ceramic Plastic SOIC

GUARANTEED OPERATING RANGES Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

54 74

4.5 4.75

5.0 5.0

5.5 5.25

V

TA

Operating Ambient Temperature Range

54 74

– 55 0

25 25

125 70

°C

IOH

Output Current — High

54, 74

– 0.4

mA

IOL

Output Current — Low

54 74

4.0 8.0

mA

FAST AND LS TTL DATA 5-1


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