Limited Stock

NE564N SIGNETICS 50 MHz PHASE-LOCKED LOOP PLL IC 16-PIN PDIP 1 PC

ICs / Integrated Circuits • SKU RFB00577

$5.95

Signetics NE564N high-frequency phase-locked loop PLL integrated circuit in a 16-pin plastic DIP package. The NE564 is a monolithic PLL designed for operation up to 50 MHz and incorporates a voltage-controlled oscillator, limiter, phase comparator, and post-detection processor. It operates from a single 5 V supply and provides TTL-compatible inputs and outputs. Typical applications include FSK modulation and demodulation, frequency synthesis, signal generators, high-speed modem circuitry, communications equipment, and vintage RF/electronic designs.

This is an obsolete legacy IC no longer in normal current production, making original NE564N devices increasingly useful for restoration, repair, and maintenance of equipment designed around the original Signetics/Philips PLL family.

Specifications:
Device Type: High-Frequency Phase-Locked Loop
PLL Type: Monolithic PLL with Post-Detection Processor
Maximum Operating Frequency: 50 MHz
Supply Voltage: Single 5 V supply
Logic Interface: TTL-compatible inputs and outputs
Internal Functions: VCO, limiter, phase comparator, post-detection processor
Loop Gain: Externally controllable
Package: 16-Pin Plastic DIP
Package Style: PDIP-16
Operating Temperature Range: 0°C to +70°C
Typical Applications: FSK receivers, FSK transmitters, frequency synthesizers, signal generators, high-speed modems, communications equipment
Marking: NE564N
Country Marking: Thailand

HISTORICAL BACKGROUND: The NE564 belongs to the classic Signetics family of high-frequency phase-locked-loop integrated circuits developed during the period when PLL technology was becoming increasingly important in communications and frequency-control equipment. Signetics documentation for the NE564 dates back to the late 1970s, and the device was later continued under Philips Semiconductors after Philips acquired Signetics. The NE564 distinguished itself by supporting operation to 50 MHz while combining the VCO, phase detector, limiter, and post-detection functions in a single IC. It subsequently appeared in communications, FSK, modem, synthesizer, signal-generation, and specialized RF designs. The NE564N is now obsolete, so original DIP devices are primarily encountered as vintage old stock or service-replacement inventory.