Texas Instruments High-Performance Analog Integrated Circuits (ICs) - Logic - Counters, Dividers SN74AS867DWRE4

The SN74AS867DWRE4 is a synchronous, presettable 8-bit up/down counter designed for high-speed counting applications. It features internal carry look-ahead circuitry, allowing for efficient cascading of multiple counters without additional gating. The device operates with a fully independent clock circuit, ensuring that all flip-flops are clocked simultaneously, which minimizes output counting spikes typically seen in asynchronous counters. This counter can be preset to any value between 0 and 255, and it supports both counting up and down modes, determined by the select inputs. The asynchronous clear function is available in specific variants, while the load-input circuitry allows for parallel loading of cascaded counters. The SN74AS867 is characterized for operation from 0¬8C to 70¬8C, making it suitable for a variety of applications. The product is available in multiple package options, including plastic small-outline and standard plastic DIP configurations.