XD74LS190 – Synchronous Up/Down Counter – Xinluda

The Xinluda XD74LS190 is a presettable synchronous up/down BCD (decade) counter in a 16-pin DIP package, part of the 74LS low-power Schottky TTL logic family.

The XD74LS190 from Xinluda is a presettable synchronous up/down BCD decade (8421) counter belonging to the popular 74LS low-power Schottky TTL logic family. State changes of the counter are synchronous with the LOW-to-HIGH transition of the clock pulse input, making the XD74LS190 well suited to programmable and cascadable counting functions in digital logic systems.

An asynchronous parallel load input overrides counting and loads the data present on the parallel inputs into the internal flip-flops, allowing the device to be used as a programmable counter. A count enable input serves as the carry/borrow input in multi-stage configurations, while a dedicated up/down count control input selects the counting direction. Terminal count and ripple clock outputs provide overflow/underflow indication and simplify the generation of carry and borrow signals when cascading multiple counters.

Key Features

• Presettable synchronous up/down BCD (decade) counter function (74LS190 type)
• Synchronous counting: state changes occur on the LOW-to-HIGH clock transition
• Asynchronous parallel load for programmable counting
• Count enable input for use as carry/borrow in multi-stage counters
• Up/Down count control input selects counting direction
• Terminal count and ripple clock outputs for cascading
• Low-power Schottky TTL (74LS) bipolar logic family
• 16-pin DIP (DIP-16) package
• RoHS compliant

Applications

• Programmable and cascadable digital counters
• Frequency dividers and frequency synthesis
• Event and pulse counting in industrial controls
• Timing and sequencing logic
• Test, measurement, and instrumentation equipment
• General-purpose TTL glue logic

Why Source XD74LS190 from Pacific Component Xchange

The XD74LS190 is a specialty 74LS-series logic IC with limited authorized-distributor availability, which can make it difficult to procure through mainstream channels. Pacific Component Xchange specializes in sourcing hard-to-find and obsolete logic and power-management components like the XD74LS190. We provide authenticity-focused supply, careful sourcing of scarce and end-of-life inventory, and global shipping for production and maintenance needs.

This is a Request-For-Quote item. Contact Pacific Component Xchange today for current pricing, available quantity, and lead time on the Xinluda XD74LS190.