74ls279.pdf part of datasheets 74ls279 74ls279.pdf, . Electronic Components Datasheets Various datasheets 74ls279.pdf text manual preview

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SN54/74LS279
QUAD SET-RESET LATCH

VCC S1 R Q S1 S2 R Q
16 15 14 13 12 11 10 9 QUAD SET-RESET LATCH
LOW POWER SCHOTTKY

1 2 3 4 5 6 7 8
R S1 S2 Q R S1 Q GND J SUFFIX
CERAMIC
CASE 620-09
TRUTH TABLE 16
1
INPUT OUTPUT
S1 S2 R (Q)
N SUFFIX
L L L h PLASTIC
L X H H 16 CASE 648-08
X L H H
1
H H L L
H H H No Change
L = LOW Voltage Level
H = HIGH Voltage Level D SUFFIX
X = Don't Care SOIC
16
h = The output is HIGH as long as 1 CASE 751B-03
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
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC

GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 54 4.5 5.0 5.5 V
74 4.75 5.0 5.25
TA Operating Ambient Temperature Range 54