Experience precision synchronisation with the OCP-TAP TimeCard, whether you choose the Rubidium, Cesium, or Quartz OCXO option. Elevate your timekeeping capabilities and achieve a new level of precision in critical industries with this exceptional product.

Why OCP-TAP Timecard?


  • Community Driven

    Developed out of the OCP-TAP eco-system.

  • Deployed at Scale

    Design choice of Hyperscalers such as Meta

  • Modular Design

    Interchangeable Oscillators and GNSS modules

  • <200ns holdover

    Best in class holdover options with the Microchip MAC-SA55

  • 100% Open Source

    Everything is open from the FPGA to the PCB

What's the different between editions?


  • Microchip MAC SA-53

    • Holdover < 300ns
    • < 5E-11 monthly aging (frequency drift per month)
    • < 5E-11 frequency change versus temperature change (-40 to +75 °C)
    • < 200 ns Holdover ability over 24 hours (typical, static temperature)
    • Remote monitoring and control (RS232 and USB)
    • 1 PPS disciplining from externally supplied signal (phase and frequency calibration)
  • Microchip MAC-SA55

    • Holdover < 200ns
    • < 5E-11 monthly aging (frequency drift per month)
    • < 5E-11 frequency change versus temperature change (-40 to +75 °C)
    • < 200 ns Holdover ability over 24 hours (typical, static temperature)
    • Remote monitoring and control (RS232 and USB)
    • 1 PPS disciplining from externally supplied signal (phase and frequency calibration)
  • Rakon OCXO

    • Frequency (Fn): 10, 12.8 or 20 MHz
    • Holdover: 24-hour (≤1.5 µs, 4°C external temperature variation)
    • Frequency stability (FvT): 0.5 ppb pk-pk
    • Operating temperature: -40 to 85°C
    • Compensated ageing: ±0.02 ppb/day
    • Free running output: Squarewave with ageing compensation in holdover mode
    • Voltage supply: 3.3 V
    • I²C bus device status and commands

Design your OCP-TAP Timecard

Time honoured solutions

built around you

  • Tech to suit your project

  • Every unit tested

  • Top performance

  • Free software available