VS-500-LFF-GNN-622M080000 Microchip Crystal or Oscillator (Other) In Stock
Microchip VS-500-LFF-GNN-622M080000 is a 622.8 MHz VCSO oscillator with PECL output, 3.3V supply, and ±50 ppm frequency stability for high-speed communication clock applications. Available from stock worldwide.
- Manufacturer
- Microchip
- Package
- Other
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Category
- Crystal or Oscillator
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 622.8 MHz VCSO output with PECL differential signaling for low-jitter high-speed clock distribution in telecom systems
- 3.3V supply with ±50 ppm APR frequency accuracy ensuring stable clocking over temperature and aging
- Voltage-controlled oscillator functionality enabling fine frequency trimming in PLL and SONET/SDH reference clock circuits
Applications
The VS-500-LFF-GNN-622M080000 is designed for SONET/SDH OC-12 line card clocking, Gigabit Ethernet PHY reference oscillators, and optical transceiver modules requiring a stable 622.8 MHz PECL clock source. Its voltage-control input supports integration into PLL-based clock synthesis and jitter attenuation circuits in telecom switching equipment, test instrumentation, and high-speed serial communication systems operating at 3.3V.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output frequency and signaling standard does VS-500-LFF-GNN-622M080000 provide for SONET clock applications?
The VS-500-LFF-GNN-622M080000 outputs a 622.8 MHz clock using PECL (Positive Emitter-Coupled Logic) differential signaling. This frequency corresponds exactly to the OC-12 SONET line rate, making it a direct reference clock source for OC-12 framer ICs and jitter attenuators in optical networking line cards operating at 622 Mbit/s transmission rates.
How does the ±50 ppm frequency accuracy of VS-500-LFF-GNN-622M080000 affect timing budget in a SONET/SDH system?
With ±50 ppm frequency accuracy over the full operating temperature range, the VS-500-LFF-GNN-622M080000 contributes a worst-case frequency offset of ±31.14 kHz at 622.8 MHz to the system clock budget. For SONET/SDH applications requiring Stratum 4E or better holdover, this initial frequency accuracy must be combined with a PLL to reduce long-term wander below the ITU-T G.813 mask, which the VCSO's voltage-control input facilitates directly.
What supply voltage does VS-500-LFF-GNN-622M080000 require, and what load termination do PECL outputs need?
The VS-500-LFF-GNN-622M080000 operates from a 3.3V supply rail. PECL differential outputs require DC termination resistors to VCC-2V (approximately 1.3V referenced to the 3.3V rail) at each output line, typically implemented with 50-ohm resistors to a VCC-2V node or equivalent AC-coupled termination, ensuring the PECL swing levels and output impedance match the receiving device's input requirements for reliable 622.8 MHz signal integrity.
What design advantage does using a VCSO like VS-500-LFF-GNN-622M080000 offer over a fixed-frequency crystal oscillator in a PLL loop?
A VCSO provides a voltage-tunable frequency control input that a PLL feedback loop can drive to lock the 622.8 MHz output to an external reference, enabling both frequency synthesis accuracy and low phase noise. A fixed-frequency crystal oscillator lacks this tuning input, making it unable to correct for frequency offset within a PLL, while the VCSO's ±50 ppm initial accuracy reduces the PLL pull-in range required and shortens lock acquisition time in SONET jitter attenuator designs.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”