SN74LS279A Quad /S-/R latches |


Quad /S-/R latches

Quad /S-/R latches - SN74LS279A


The ’279 offers 4 basic S\-R\ flip-flop latches in one 16-pin, 300-mil package. Under conventional operation, the S\-R\ inputs are normally held high. When the S\ input is pulsed low, the Q output will be set high. When R\ is pulsed low, the Q output will be reset low. Normally, the S\-R\ inputs should not be taken low simultaneously. The Q output will be unpredictable in this condition.


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Parametrics Compare all products in Other latch

Technology Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
Voltage (Nom) (V)
F @ nom voltage (Max) (Mhz)
ICC @ nom voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
IOL (Max) (mA)
IOH (Max) (mA)
3-state output
Operating temperature range (C)
SN74LS279A SN54LS279A
LS     LS    
4.75     4.75    
5.25     5.25    
4     4    
5     5    
35     35    
7     7    
30     22    
8     8    
-0.4     -0.4    
No     No    
0 to 70     -55 to 125