Limited Stock

SIGNETICS NE564N 50 MHz PHASE-LOCKED LOOP PLL FSK DEMODULATOR DIP-16 VINTAGE IC

ICs / Integrated Circuits • SKU RFB00597

$7.99

Original Signetics NE564N high-frequency phase-locked loop integrated circuit in a 16-pin plastic DIP package. The NE564 is a complete monolithic PLL incorporating a voltage-controlled oscillator, phase comparator, limiter, and post-detection processing circuitry.

LIFECYCLE STATUS: OBSOLETE.

The NE564 was designed for operation at frequencies up to approximately 50 MHz and supports applications including FSK modulation and demodulation, frequency synthesis, signal generation, modem circuits, communications equipment, and RF-related control systems.

The device can operate from a single 5V supply and provides TTL-compatible interface functions, making it especially useful in older digital communications and frequency-control equipment.

Visible package markings include NE564N, FMD7131, 9249VG, and THAILAND. The 9249 portion is consistent with a 1992 week-49 production date code.

This listing and price are for one IC. Four pieces are available.

HISTORICAL BACKGROUND:

The NE564 belongs to the classic Signetics 560-series family of phase-locked-loop integrated circuits developed during the expansion of solid-state communications and frequency-control electronics.

Phase-locked loops became extremely important in radio and communications equipment because they allowed electronic systems to track, recover, generate, and synchronize frequencies without relying entirely on large collections of discrete analog components.

The NE564 was a particularly capable member of this family because of its comparatively high operating frequency. Its internal circuitry allowed operation to approximately 50 MHz, substantially extending PLL applications into higher-speed communications and RF-related systems.

Typical historical applications included high-speed modems, FSK receivers and transmitters, frequency synthesizers, signal generators, clock recovery circuits, satellite and television-related equipment, data communications equipment, and laboratory electronics.

Signetics became part of Philips during the semiconductor industry's consolidation era, and the NE564 family continued to appear in later Philips documentation. Original Signetics-marked examples remain useful for servicing equipment originally designed around the device and for period-correct restoration of legacy electronic systems.