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四路 /S-/R 锁存器
Function RS latch
Number of channels (#) 4
Technology Family LS
Supply voltage (Min) (V) 4.75
Supply voltage (Max) (V) 5.25
Input type Bipolar
Output type Push-Pull
Data rate (Max) (Mbps) 70
IOL (Max) (mA) 8
IOH (Max) (mA) -0.4
Features Very high speed (tpd 5-10ns)
  • Package Options Include Plastic "Small Outline" Packages, Ceramic Chip Carriers and Flat Packages, and Plastic and Ceramic DIPs
  • Dependable Texas Instruments Quality and Reliability

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.