XD2917-14 – Frequency-to-Voltage Converter – Xinluda

The Xinluda XD2917-14 is a 14-pin DIP monolithic frequency-to-voltage (F/V) converter from the LM2907/LM2917 family, integrating a charge-pump tachometer, a high-gain op amp/comparator, and an on-chip zener shunt regulator.

The Xinluda XD2917-14 is a monolithic frequency-to-voltage (F/V) converter supplied in a 14-pin DIP package. It belongs to the well-established LM2907/LM2917 family and is the Xinluda equivalent of the industry-standard LM2917-14, making it a practical alternative for tachometer, speed-sensing, and frequency-detection circuits. The “17” designation (as opposed to the LM2907/XD2907) indicates the inclusion of an on-chip zener shunt regulator, allowing stable frequency-to-voltage and frequency-to-current operation from an unregulated supply with only a single series resistor.

The device combines a charge-pump tachometer input stage with a high-gain op amp/comparator. The tachometer uses a frequency-doubling charge-pump technique to deliver low-ripple output and full input protection, and the output swings to ground for a zero-frequency input. The op amp/comparator features a floating transistor output capable of driving relays, lamps, or other loads when the input frequency reaches or exceeds a user-selected threshold. The 14-pin version brings out additional internal connections compared with the 8-pin part, giving designers access to a differential tachometer input and the op amp inputs for greater application flexibility.

Key Features

• Monolithic frequency-to-voltage (F/V) converter, LM2917-14 type
• Charge-pump tachometer with frequency-doubling for low output ripple
• On-chip zener shunt regulator (typ. 7.56 V) for operation from an unregulated supply (XD2917 family feature)
• High-gain op amp / comparator with floating-transistor output
• Output swings to ground at zero input frequency (ground-referenced)
• Op amp output capable of sourcing or sinking load current to drive relays and lamps
• Maximum supply voltage 28 V; maximum collector and input voltage 28 V (per datasheet limiting parameters)
• Operating temperature range -25°C to +85°C (civil grade, per Xinluda datasheet)
• 14-pin DIP through-hole package

Applications

• Motor and engine speed (tachometer / RPM) sensing
• Speed governors and over/under-speed detection
• Magnetic pickup and Hall-sensor signal conditioning
• Frequency-to-voltage conversion and frequency switching
• Touch or proximity switch and motion-detector circuits
• Automotive and industrial control instrumentation

Why Source XD2917-14 from Pacific Component Xchange

The Xinluda XD2917-14 is an end-of-life (EOL) part with little to no authorized-distributor stock, which can stall production for designs that depend on this specific F/V converter. Pacific Component Xchange specializes in hard-to-find and obsolete power-management and signal-conditioning ICs, helping engineers and buyers secure parts that mainline distributors no longer carry. We support authenticity-focused sourcing, flexible quantities, and global shipping. Request a quote (RFQ) for the XD2917-14 today and our sourcing team will respond with availability, lead time, and pricing. Contact Pacific Component Xchange to lock in supply for your tachometer and frequency-sensing builds.