PL500-16SC-R

Clock Generators, PLLs, Frequency Synthesizers Overview

The PL500-16SC-R is a low phase noise Voltage Controlled Crystal Oscillator (VCXO) manufactured by Micrel Inc., now part of Microchip Technology. It operates with a fundamental crystal input frequency range of 16MHz to 36MHz and provides an output clock in the 1MHz to 18MHz range. The device features selectable divide ratios of ÷2 or ÷4 via the DIVSEL pin, LVCMOS output with tri-state control, and integrated high linearity variable capacitors. Key electrical specifications include a typical RMS period jitter of 2.5ps, a pull range of ±150 ppm, and operation within a 2.5V to 3.3V supply voltage. It is housed in an 8-pin SOP package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Low Phase Noise: -142 dBc/Hz at 10kHz offset using a 35.328MHz crystal
• Selectable Divider: Supports ÷2 or ÷4 division ratios controlled by the DIVSEL pin
• High Linearity: Integrated variable capacitors provide ±150 ppm pull range with max 5% linearity
• Low Jitter: Achieves 2.5ps RMS period jitter for precise timing applications

Clock Generators, PLLs, Frequency Synthesizers Applications

• Voltage controlled frequency sources requiring low jitter
• Clock generation systems utilizing 16MHz to 36MHz fundamental crystals
• Communication equipment needing stable VCXO outputs in the 1MHz to 18MHz range

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity, as Micrel products are now under Microchip Technology. Confirm the specific ordering suffix '-R' corresponds to the Tape and Reel packaging format for the 8-Pin SOP variant. Check for RoHS compliance status and ensure the commercial temperature grade (-40°C to 85°C) meets system requirements.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the PL500-16 series when a ÷2 or ÷4 divider is required; the PL500-15 series offers ÷8 or ÷16 options. Ensure the external crystal matches the specified load capacitance (typically 7.8pF to 8.9pF depending on VDD) and operates in fundamental resonant mode. Verify that the application can accommodate the 12mA drive capability and the specific power supply voltage range of 2.5V to 3.3V.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The PL500-16SC-R belongs to the PL500-15/16 family of low-cost, high-performance VCXOs originally developed by Micrel Inc. This family is designed for applications demanding low phase noise and jitter. The 'SC' designation indicates the 8-Pin SOP package, while the '-R' suffix specifies tape and reel packaging. The device is commercially graded and available in multiple package options including SOT23 and die form.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other Micrel/Microchip VCXO families or comparable industry components based on pin compatibility, electrical specifications, and package dimensions.