SN54LS279 Datasheet, PDF (1/4 Pages) Motorola, Inc – QUAD SET-RESET LATCH

QUAD SET-RESET LATCH
SN54/74LS279
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
56
78
R S1 S2 Q R S1 Q GND
TRUTH TABLE
INPUT
S1 S2 R
L LL
L XH
X LH
HHL
H HH
OUTPUT
(Q)
h
H
H
L
No Change
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
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
Output Current — Low
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
Min
Typ
Max
Unit
54
4.5
5.0
5.5
V
74
4.75
5.0
5.25
54
– 55
25
125
°C
74
0
25
70
54, 74
– 0.4
mA
54
4.0
mA
74
8.0
FAST AND LS TTL DATA
5-452