Texas Instruments

CD4520BF3A

CD4520BF3A Description

The CD4520BF3A from Texas Instruments is a dual 4-bit binary counter belonging to the 4000B series, designed for high-reliability digital counting applications. Housed in a 16-pin CDIP package, it operates over a wide voltage range (3V to 18V), making it versatile for both low-power and industrial systems. This synchronous counter features two independent 4-bit counters, each capable of counting up at a maximum rate of 8 MHz. Its asynchronous reset and dual-edge triggering (positive/negative) provide flexible control, while its ROHS3 compliance ensures environmental safety.

CD4520BF3A Features

• Dual 4-bit counters: Two independent counters in a single package, reducing board space.
• Wide voltage range (3V–18V): Compatible with TTL and CMOS logic levels.
• Synchronous operation: Ensures precise timing and reduced skew in high-speed applications.
• Asynchronous reset: Immediate counter clearing for system reinitialization.
• Dual-edge triggering: Supports both positive and negative clock edges for design flexibility.
• High count rate (8 MHz): Suitable for frequency division and timing circuits.
• Robust packaging (CDIP): Ideal for harsh environments due to through-hole mounting.

CD4520BF3A Applications

This counter excels in:

• Frequency dividers: Used in clock generation and signal processing.
• Industrial control systems: Reliable counting in automation and PLCs.
• Digital instrumentation: Event counting in test equipment.
• Consumer electronics: Timing circuits in appliances and displays.
• Retro computing: Compatible with legacy CMOS/TTL designs.

Conclusion of CD4520BF3A

The CD4520BF3A stands out for its dual-counter design, wide voltage tolerance, and synchronous operation, making it a robust choice for high-precision counting and timing applications. Its asynchronous reset and dual-edge triggering offer superior control, while its 8 MHz capability ensures performance in demanding environments. Ideal for industrial, consumer, and legacy systems, this counter combines reliability, flexibility, and compliance with modern standards.