Texas Instruments

CD4518BM

CD4518BM Description

The CD4518BM from Texas Instruments is a dual 4-bit BCD counter belonging to the 4000B series, designed for high-reliability synchronous counting applications. This surface-mount IC (16-SOIC package) operates over a wide voltage range of 3V to 18V, making it versatile for both low-power and industrial systems. It features synchronous counting with asynchronous reset, supporting positive or negative edge-triggered clock inputs for flexible timing control. With a count rate of 8 MHz, it delivers robust performance in sequential logic designs. The device is ROHS3 compliant and REACH unaffected, adhering to environmental and safety standards.

CD4518BM Features

• Dual 4-bit BCD counters in a single package, reducing board space and cost.
• Synchronous operation ensures precise timing, minimizing skew in multi-stage counters.
• Wide supply voltage range (3V–18V) for compatibility with TTL, CMOS, and mixed-voltage systems.
• Asynchronous reset allows immediate counter initialization without clock dependency.
• Edge-triggered (positive/negative) clock inputs for design flexibility.
• High noise immunity typical of CMOS technology, ideal for industrial environments.
• Low power consumption and 8 MHz count rate balance speed and efficiency.

CD4518BM Applications

The CD4518BM excels in applications requiring accurate frequency division, event counting, or time-delay generation, such as:

• Digital clocks and timers (e.g., hour/minute counters).
• Industrial control systems (e.g., conveyor belt monitoring).
• Test and measurement equipment (e.g., frequency dividers).
• Automotive electronics (e.g., odometer circuits).
• Consumer electronics (e.g., appliance cycle counters).
  Its dual-counter integration simplifies designs needing multiple counting stages, while its wide voltage range ensures compatibility with battery-powered and line-operated devices.

Conclusion of CD4518BM

The CD4518BM is a high-performance, versatile BCD counter offering synchronous operation, flexible triggering, and robust voltage tolerance. Its dual-counter design and industrial-grade reliability make it ideal for precision timing and counting applications across automotive, industrial, and consumer sectors. While classified as Last Time Buy, its enduring design and compliance with modern standards (ROHS3, REACH) ensure it remains a practical choice for legacy and new designs requiring dependable BCD counting.