XD4518 – Dual BCD Up-Counter (CMOS Logic) – Xinluda

The Xinluda XD4518 is a dual synchronous BCD up-counter in a DIP-16 package, part of the 4000-series CMOS logic family. Available for RFQ from Pacific Component Xchange.

The Xinluda XD4518 is a dual BCD (binary-coded decimal) up-counter built on robust 4000-series CMOS logic technology. Pin-compatible with the industry-standard CD4518 function, it integrates two independent, synchronous 4-bit BCD counters in a single DIP-16 package, making it a versatile building block for frequency division, timing chains, and multistage counting applications. Each counter advances on either a rising clock edge or a falling enable edge, supporting both synchronous and ripple cascade configurations.

Operating across a wide 3 V to 16 V supply range with a typical clock frequency of up to 6 MHz, the XD4518 delivers the noise immunity, low quiescent current, and broad operating-voltage tolerance that have made CMOS logic counters a mainstay in industrial and consumer electronics for decades.

Key Features

• Dual synchronous BCD (decade) up-counter – two independent 4-bit counters per device
• Wide supply voltage range: 3 V to 16 V
• Typical clock frequency up to 6 MHz
• Supports multistage synchronous counting and multistage ripple counting
• Rising-edge or falling-edge triggering with active reset
• Cascadable for higher-modulus counting and frequency division
• DIP-16 through-hole package
• RoHS compliant
• Functionally equivalent to the standard CD4518 dual BCD counter

Applications

• Frequency division and clock-divider chains
• Digital timers and counters
• Multistage synchronous and ripple counting systems
• Industrial control and instrumentation logic
• Consumer electronics and appliance control boards
• Legacy and replacement designs requiring CD4518-compatible parts

Why Source XD4518 from Pacific Component Xchange

The XD4518 is an Asian-market CMOS logic device with little to no authorized-distributor stock in Western channels, which makes it a hard-to-find part for designers maintaining or producing boards that specify it. Pacific Component Xchange is an independent distributor specializing in exactly these scenarios – sourcing obsolete, allocated, and hard-to-find logic and power-management components from a vetted global supply network.

Every XD4518 we supply is backed by our authenticity and quality-assurance process to protect your build against counterfeit risk, and we ship worldwide to keep your production line moving. Pricing on this part is quote-based. Request an RFQ today and our sourcing team will return current availability, lead time, and pricing for the quantities you need.