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DATE
02
/ 2024 August
Product Brief
Product Brief - Xterniti OCXO
Introduction
TXC’s latest Xterniti OCXO is industry-first “frequency hysteresis” versus temperature compensation of an ASIC-based miniature OCXO using its patented design to extend holdover performance.
Traditional 24-hour OCXOs have been demonstrated by high-end PPS Disciplined OCXO with aging compensation and Stratum 2 OCXO with its ultra-high stability and aging performance. Those traditional OCXOs are discrete circuitry, power hungry, unable to process frequency hysteresis compensation, and higher cost. The Xterniti OCXO with ”thermal hysteresis” versus temperature and aging compensation enables a “stratum 3 level OCXO” in a miniature 14 x 9 mm package to achieve extended 24 hours phase holdover in a constant temperature and 8~24 hours in a dynamic real world temperature conditions by using a IEEE 1588 available synchronizer and a network processor.
The Xterniti OCXO is sample available now in a 14 x 9 mm package. Samples of the 7x5 mm package will be available in Q4/2024.
| Feature | Benefits |
|---|---|
| ThermSym Technology | Thermal Symmetry patented technology with a heater-embedded ceramic package provides excellent thermal performance. Better reliability compared to the solution that uses the embedded heater in the IC. |
| Integrated Circuit Technology | Advanced oven control algorithm. IC based superior reliability compared to traditional discrete OCXO. |
| ThermSymHercules Technology | Industry's widest operating temperature IC OCXO over -40 to 105°C. Advanced OCXO IC support wider the operating range. Multi-order oven control algorithm to enhance stability over temperature. |
| Built-in non volatile memory (NVM) | For customized registers. I2C interface available for system level post compensation. Aging and temperature coefficients can be stored in the NVM. Other mandatory registers are available. |
| Resonator Temperature Output | Thermal Hysteresis Compensation enables a Stratum 3 OCXO to achieve 8~24 hours holdover performance under real world temperature conditions. |
| Extended Holdover Performance | 24 Hours Holdover (constant temperature). 8~24 Hours Holdover (under real world temperature conditions). “Stratum 3 OCXO” works like Stratum 2 clock. Thermal Hysteresis Compensation with resonator temperature output. TXC’s own algorithm on hysteresis compensation or co-worked IDHs algorithm easily embedded in a network processor with IEEE1588 available synchronizer. |
Applications & Compliance Support
| Applications | Compliance Support |
|---|---|
| BBU/DU/CU | Packet Based Telecom Time Slave Clock on G.8273.2 |
| Radio access networks (RAN)/O-RAN | SyncE Ethernet Equipment Clocks based on G.82 |
| PTP enable Switch/Router | Enhanced Ethernet Equipment Clocks based on G.8262.1 |
| Datacenters | Telecom Transparent Clocks based on G.8273.3 |
| Phase Holdover Requirement | Packet Equipment Clock based on G.8263 and G.8266 G.812 Type III |
| Key Specs | Xterniti OCXO | Stratum 2 OCXO | PPS Disciplined OCXO |
|---|---|---|---|
| Holdover (1.5μs) | >24 hrs | >24 hrs (1μs) | >24 hrs |
| Compensation | V | X | V |
| Temperature | -40~105°C | -20~70°C | -40~85°C |
| Warm-up | < 1.5min | < 3min | < 3min |
| Stability | ±10~20ppb | ±0.1ppb | ±0.5ppb |
| Hysteresis | 10ppb | 0.1ppb | 0.3ppb |
| Aging | 3ppb/day | ±0.02ppb/day | ±0.2ppb/day |
| Size | 14x9 mm 7x5mm (Q4/2024) |
52x42 mm | 25x22 mm |