SN54LS279AJ

The Texas Instruments SN54LS279AJ is a quadruple /S-/R latch IC belonging to the LS technology family. This component provides four basic S-R flip-flop latches within a single package, designed for applications requiring high-speed data handling.

Key electrical characteristics include a maximum data rate of 70 Mbps, an IOL of 4 mA, and an IOH of -0.4 mA. The device operates with bipolar input types and a push-pull output type. It is specified for very high speed operations, with typical propagation delays (tpd) between 5 to 10 nanoseconds.

The SN54LS279AJ is rated for military applications and operates across a wide temperature range from -55°C to 125°C. It is available in a 16-pin CDIP package. Under conventional operation, the S-R inputs are normally held high. Pulsing the S input low sets the Q output high, while pulsing the R input low resets the Q output low. It is advised not to take the S-R inputs low simultaneously, as this can lead to unpredictable output behavior.

This latch is suitable for various digital logic applications where fast set and reset functions are required. Its robust design and wide operating temperature range make it a reliable choice for demanding environments.