Texas Instruments

SN74LS92DR

SN74LS92DR Description

The SN74LS92DR from Texas Instruments is a 4-bit divide-by-12 counter integrated circuit (IC) in a 14-pin SOIC package, designed for surface-mount applications. Operating within a 4.75V to 5.25V supply range, it features synchronous reset functionality and positive-edge triggering, ensuring precise timing control in digital systems. With a 42 MHz count rate, this IC delivers high-speed performance suitable for frequency division and counting applications. Classified as obsolete but still relevant in legacy designs, it remains ROHS3 compliant and REACH unaffected, making it a viable choice for environmentally conscious projects.

SN74LS92DR Features

• High-Speed Operation: Supports counting frequencies up to 42 MHz, ideal for timing-critical applications.
• Synchronous Reset: Ensures predictable counter initialization without glitches.
• Low Power Consumption: Part of the 74LS series, optimized for efficient power usage in TTL logic systems.
• Surface-Mount Package: 14-SOIC (Tape & Reel) packaging enables compact PCB designs.
• Wide Operating Temperature: Functions reliably from 0°C to 70°C, suitable for industrial and commercial environments.
• Positive Edge-Triggered Clocking: Enhances noise immunity and synchronization accuracy.

SN74LS92DR Applications

• Frequency Division: Used in clock generation circuits to derive lower frequencies from a master clock.
• Digital Counters: Ideal for event counting in industrial automation, instrumentation, and control systems.
• Timing Circuits: Employed in sequential logic designs requiring precise timing intervals.
• Legacy System Maintenance: Supports repairs/upgrades of older digital systems where modern alternatives may not be compatible.
• Educational Prototyping: Useful for teaching digital logic principles due to its straightforward divide-by-12 functionality.

Conclusion of SN74LS92DR

The SN74LS92DR is a robust, high-performance divide-by-12 counter offering speed, reliability, and compatibility with TTL logic systems. While marked as obsolete, its synchronous operation, 42 MHz capability, and surface-mount design make it a practical choice for legacy upgrades, industrial controls, and educational applications. Engineers valuing precision timing and low-power efficiency in a compact form factor will find this IC a dependable solution.