SN54LS169BJ

The SN54LS169BJ from Texas Instruments is a 4-bit synchronous, presettable binary counter. It features internal carry look-ahead circuitry, enabling high-speed counting applications and facilitating cascading for n-bit synchronous operations without additional gating.

This counter operates synchronously, meaning all flip-flops are clocked simultaneously, ensuring outputs change coincidentally. This design helps eliminate output counting spikes often seen in asynchronous counters. The device has a buffered clock input that triggers on the rising edge of the clock waveform. The up/down input determines the count direction: high for counting up, low for counting down.

Key specifications include a 4-bit count, LS technology family, bipolar input type, and push-pull output type. It boasts high-speed operation with a propagation delay between 10-50 ns. The operating temperature range is -55 to 125°C, and it carries a military rating.

Available in LCCC (FK), CFP (W), and CDIP (J) packages, the SN54LS169BJ is designed for robust performance in various environments. Its synchronous operation and cascading capability make it a versatile component for digital logic designs requiring precise counting.