DM74LS193M

The DM74LS193M from Texas Instruments is a synchronous 4-bit up/down binary counter designed for digital logic applications. Its synchronous operation ensures that all flip-flops are clocked simultaneously, eliminating output counting spikes often seen in asynchronous counters. This device features a fully programmable counter, allowing each output to be preset to a desired level via the load input.

The counter's direction of counting is determined by the count input that is pulsed while the other is held high. It includes an independent clear input that forces all outputs to a low level, regardless of other input states. The DM74LS193M is designed for cascading, with available borrow and carry outputs to facilitate chaining multiple counters for extended bit counts.

This counter operates within a wide temperature range, from -55°C to 125°C for 54LS/DM54LS variants and 0°C to 70°C for DM74LS variants. The absolute maximum supply voltage is 7V, and input voltage is also limited to 7V. It is supplied in a 16-pin dual-in-line package (DIP) suitable for through-hole mounting.

Key features include synchronous operation, internal cascading circuitry, and individual preset capabilities for each flip-flop. These characteristics make the DM74LS193M suitable for various digital counting and division tasks where precise control and predictable operation are required.