125MHz LVDS Clock 5-Minute Speed Dating Guide: A Table to Understand the OBEWDLVTNY-125 with Your Board

31 January 2026 0

Still reworking your FPGA/Switch chip selection for 125MHz LVDS oscillators? A quick-check table + a 5-minute process allows you to determine at a glance whether the OBEWDLVTNY-125 is suitable, completely saying goodbye to "high-speed communication clock selection" pitfalls.

! Quick-Check Table: OBEWDLVTNY-125 Core Parameters

125MHz LVDS Clock Core Parameters

Key indicator summary: 125 MHz LVDS output, 3.3 V single power supply, phase jitter 0.05 ps (12 k-20 MHz), package 3.2 mm × 2.5 mm. If these three sets of data match your board specifications, 70% of the selection work is completed.

Key Electrical Indicator Comparison

Parameter Name Nominal Value Tolerance Range Remarks
Output Frequency 125.000 MHz ±25 ppm LVDS Differential Signal
Phase Jitter 0.05 ps RMS - 12 k - 20 MHz Bandwidth
Supply Voltage 3.3 V ±5 % 65 mA Typical Current
Start-up Time 10 ms Max - Measured approx. 3 ms at 25 °C

Jitter Performance Visual Comparison (Shorter is Better):

Industry Standard (0.3ps)
OB-U Series (0.05ps)

Package Dimensions and Pin Definitions

The OB-U series adopts a 3.2 mm × 2.5 mm × 1.0 mm ceramic package with a standardized 6-pin layout:

  • PIN 1: Output Enable (EN)
  • PIN 2/3: Differential Output (OUT)
  • PIN 4: Ground (GND)
  • PIN 5: No Connection (NC)
  • PIN 6: 3.3 V Power Supply (VDD)

※ PCB pad center distance is 0.65 mm, fully compatible with mainstream FPGA clock input pads.

5-Minute Quick-Matching Process: Three-Step Verification

01

Signal Interface Matching

Confirm the board supports LVDS differential: 100 Ω termination resistor near the receiver. For line lengths > 5 cm, differential termination must be added at the end. The OBEWDLVTNY-125 output swing reaches 350 mV, providing sufficient margin.

02

Power Supply and Timing

FPGA power-up timing requires the clock to be stable within 1 ms after configuration is complete. The typical start-up time for this model is 3 ms, fully meeting the requirements. If the main controller uses 1.8 V I/O, it is recommended to add a level shifter chip.

03

Environmental Adaptability

Confirm the operating temperature. The industrial standard (-40~85 °C) covers the vast majority of outdoor base station and switch requirements. Temperature drift is controlled within ±25 ppm, ensuring long-term stable operation.

Typical Application Scenario Examples

FPGA High-Speed Transceiver Reference Clock

Xilinx Kintex-7 GTX transceivers require 0.05 ps jitter; it can be soldered directly near the core pins, saving approximately 0.45 USD in extra filter costs.

56G Switch Chip Synchronous Clock

Synchronous ports require 125 MHz ±20 ppm. The OB-U series has excellent industrial-grade temperature drift specifications, and its jitter indicator is 10 times better than the chip specification, ensuring link eye diagram margin > 20%, easily passing SI simulation verification.

Purchasing and Board-Level Verification Checklist

Stock and Price Reference

  • Minimum order 1k reel, unit price range 1.55~1.68 USD
  • Bulk quantities (≥1 k) can be negotiated down to 1.49 USD
  • Small batch sample unit price approx. 1.72 USD, immediate shipping from stock

3 Must-Test Items Checklist

  • Phase Noise: Confirm 12 k-20 MHz integration
  • Full-Temperature Power Consumption: Current required at -40~85 °C
  • Start-up Timing: VDD rising to clock stability

Frequently Asked Questions (FAQ)

Is 50 fs phase jitter enough for the OBEWDLVTNY-125? +
The measured 0.05 ps (50 fs) RMS is far below the 0.3 ps requirement of 56G SerDes, with a margin up to 6 times. It can significantly improve link eye diagram quality without blindly pursuing more expensive low-jitter models.
What are the actual measurement results for industrial-grade -40~85 °C drift? +
100 cycles of environmental chamber testing show a maximum frequency drift of +18 ppm, well below the ±25 ppm specification upper limit, with no abnormal frequency hopping, making it very suitable for outdoor base station applications.
How is the long-term aging rate performance? +
Based on 1,000 hours of accelerated aging test conversion, the annual drift at 85 °C is
Can a 2.5 V power supply be used? +
Although the OB-U series can still operate at 2.5 V, the phase jitter will degrade from 0.05 ps to 0.12 ps. To ensure optimal system performance, it is strongly recommended to stick to a 3.3 V power supply.
What are the precautions for layout routing? +
Differential pair length difference should be controlled within ≤5 mil, and the 100 Ω termination resistor must be close to the receiver. Clock lines should be kept away from other high-speed signal lines (spacing ≥ 3 times the line width) to reduce crosstalk and further optimize the eye diagram.

Selection Summary

Just 5 minutes: Check against the quick-check table → Three-step quick-matching process → Implementation of the verification checklist.

0.05 ps Ultra-low Jitter 3.3 V Standard Voltage -40~85 °C Industrial Grade

OBEWDLVTNY-125: Making high-speed communication selection simple again.

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    OMENGLVAKY-212.500000 Data Sheet Full disassembly: size, electrical characteristics understand at one time
    2026-01-30 22:06:03 0
    Is your 212.5 MHz high-speed transmission link still troubled by clock jitter? In actual tests, the OMENGLVAKY-212.500000 LVDS XO suppressed RMS jitter in the 12 kHz to 20 MHz range to 0.3 ps — 35% lower than similar products. This article uses a comprehensive datasheet approach to help you understand dimensions, electrical characteristics, and implementation techniques. Product Positioning and Model Decoding When you receive an OMENGLVAKY-212.500000, don't rush to check the parameters; first, decode the name: OM-E-N package series, with the suffix 212.500000 representing a fixed frequency of 212.5 MHz. It is specifically designed for 56G-PAM4 optical modules, high-end FPGA reference clocks, and low-jitter SERDES links, positioned for "ultra-low jitter, ultra-small package, and industrial-grade reliability." Naming Segment Meaning OM OM Series Ultra-Low Jitter XO E LVDS Output Format N 1.6 × 2.0 mm Leadless Ceramic Package 212.500000 212.5 MHz Precise Frequency Jitter Performance Comparison (RMS Jitter 12kHz-20MHz) Standard Industrial Grade LVDS XO 0.46 ps OMENGLVAKY-212.500000 0.3 ps (-35%) Typical Applications: 56G-PAM4 Optical Modules, High-end FPGA Reference Clocks, Low-jitter SERDES Links In 400 GbE optical modules, the OMENGLVAKY-212.500000 directly drives the DSP reference clock, where 0.3 ps RMS jitter improves PAM4 eye opening margin by 0.15 UI. On Xilinx Ultrascale+ FPGAs, using it as a GTY transceiver reference results in a BER curve flat down to 1E-15. Mechanical Dimensions and Pad Analysis Small size is not just a gimmick; it's the key to successful PCB layout. The 6-SMD leadless package measures 1.6 mm × 2.0 mm × 0.9 mm. The actual height after reflow is only 0.85 mm, allowing it to easily fit into the top of a QSFP-DD cage. 6-SMD Leadless Package Measurement Front pad center distance is 0.65 mm, ceramic substrate thickness is 0.25 mm, and bottom copper layer thickness is 0.15 mm. A stencil opening of 0.3 mm × 0.4 mm is recommended. Reflow Temperature Profile Recommended to use a 0.12-0.15 mm laser-cut stencil. Reflow peak at 245 °C, maintained above the liquidus for 60 s, ensures low void rates. Electrical Characteristics Datasheet Breakdown ⚡ LVDS Output Parameters Differential Amplitude: 350 mV ±50 mV Common Mode Voltage: 1.125 V Typical Rise/Fall Time: 120 ps (20%-80%) 🔋 Power Supply and Consumption Operating Voltage: 3.3 V Typical Typical Current: 55 mA (Measured 53 mA no-load) Standby Current: After Enable pin is pulled low Frequency Stability Grade Selection Guide: ±25 ppm: For 56G/112G Optical Modules ±50 ppm: Covers All Industrial-grade Scenarios ±100 ppm: Cost-sensitive Switches Environmental and Reliability Indicators Reliability parameters on the last page of the datasheet determine mass production yield; do not skip them: Temperature Verification: -40 °C ~ +85 °C 500 cycles across three temperature zones, frequency drift Mechanical Strength: MTBF > 20 Million Hours 1000 g half-sine drop test; 20 g random vibration (20-2000 Hz). Complies with rigorous MIL-STD-883 standards. Key Summary ✔ The OMENGLVAKY-212.500000 leads its class of LVDS XOs with 0.3 ps RMS jitter, capable of directly driving 56G-PAM4 DSPs. ✔ The 1.6 × 2.0 mm 6-SMD package is 85% smaller than 7050, offering an absolute advantage in compact QSFP-DD designs. ✔ The ±50 ppm industrial temperature version is sufficient to cover most harsh environments, with an MTBF exceeding 20 million hours. Frequently Asked Questions Can the OMENGLVAKY-212.500000 replace a 212.5 MHz XO in a 7050 package? ▼ Yes. Pin definitions are compatible; you only need to hollow out the center of the 7050 pads and reduce the trace width to 100 Ω differential. Actual jitter can be reduced by 35% while saving over 60% of board space. Under what conditions was the 0.3 ps jitter in the datasheet measured? ▼ This data was measured under a 3.3 V power supply, 25 °C ambient temperature, 12 kHz to 20 MHz integration bandwidth, and 50 Ω load conditions. The test instrument used was the Keysight E5052B Phase Noise Analyzer, ensuring high reproducibility of the results. What is the price difference between ±25 ppm and ±50 ppm when selecting? ▼ In high-volume procurement, ±50 ppm is typically about 18% cheaper than ±25 ppm. For most 400 GbE optical modules, ±50 ppm is completely sufficient; however, for Synchronous Ethernet (SyncE) or precision gateways, the ±25 ppm version is recommended. © 2024 Clock Frequency Selection Expert Guide - Focusing on technical analysis of high-performance LVDS oscillators
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