Texas Instruments SN74LV161A 4-Bit Synchronous Binary Counters SN74LV161AD

The SN74LV161AD is a 4-bit synchronous binary counter designed for operation within a voltage range of 2 V to 5.5 V. It features a maximum propagation delay of 9.5 ns at 5 V, making it suitable for high-speed counting applications. The device supports mixed-mode voltage operation on all ports and includes internal carry look-ahead circuitry, which facilitates cascading for n-bit synchronous applications without additional gating. This counter is fully programmable, allowing presetting to any value between 0 and 15, and it operates synchronously, meaning all flip-flops are clocked simultaneously to eliminate output counting spikes. The clear function is asynchronous, enabling immediate reset of the outputs to low regardless of other input levels. The device also includes partial-power-down mode support through Ioff, preventing backflow current when powered down. The SN74LV161AD is available in various package options, including SOIC and TSSOP, and is specified for operation over a temperature range of -40¬8C to 85¬8C. Its robust design includes ESD protection exceeding industry standards, making it a reliable choice for various electronic applications.