RALTRON OSCILLATORS OPTIMIZED FOR IEEE 1588 PROTOCOL APPLICATIONS
Oscillators for Timing Solutions and Telecom Applications
| TX253 | TX257 | OX1100 | OX2100 | OX3100 | OX5100 | OX8100 | OX4100 | |
|---|---|---|---|---|---|---|---|---|
| Application | TCXO Stratum 3 | TCXO Stratum 3 | OCXO Stratum 3 | OCXO Stratum 3 | OCXO Stratum 3E | OCXO Stratum 3E | OCXO Stratum 3E | Master clock - PRS |
| Package | 3.2x5mm | 5x7mm | 9x14mm | 13x20mm | 36x27mm | 25x22mm | 25x25mm | 50x50mm |
| Frequencies(MHz) | 20.000, 24.576, 49.152 | 20.000, 24.576, 49.152 | 20.000, 24.576, 49.152, 98.304 | 20.000, 24.576, 49.152, 98.304 | 20.000, 24.576, 49.152, 98.304 | 20.000, 24.576, 49.152, 98.304 | 20.000, 24.576, 49.152, 98.304 | 20.000, 24.576, 49.152, 98.304 |
| Stability/Holdover | ≤280ppb | ≤280ppb | ≤280ppb | ≤280ppb | ≤10ppb | ≤10ppb | ≤10ppb | ≤0.5ppb |
| Jitter | <0.85ps @24.576MHz <0.8ps @49.152MHz | <0.35ps @49.152MHz | <0.29ps @49.152MHz | <0.29ps @49.152MHz | <0.37ps @10.000MHz | <0.33ps @10.000MHz | <0.33ps @10.000MHz | <0.70ps @20.000MHz |
| Loop BW | 100mHz | 100mHz | 10mHz | 10mHz | 1mHz | 1mHz | 1mHz | 0.5mHz |
| MTIE [ns] | |||||||
|---|---|---|---|---|---|---|---|
| 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| 3 | 3 | 2 | 2 | 1.5 | 1.5 | 1.5 | 1 |
| 15 | 15 | 12 | 12 | 10 | 10 | 10 | 8 |
| 20 | 20 | 20 | 20 | 15 | 15 | 15 | 12 |
| TDEV [ns] | |||||||
|---|---|---|---|---|---|---|---|
| 0.02 | 0.02 | 0.02 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 |
| 0.25 | 0.25 | 0.15 | 0.15 | 0.05 | 0.05 | 0.05 | 0.05 |
| 2 | 2 | 1.6 | 1.6 | 1 | 0.9 | 0.9 | 0.8 |
| 6 | 6 | 5 | 5 | 4 | 3.7 | 3.6 | 3.5 |
MTIE per GR-1244
TDEV per GR-1244
Oscillator Requirements for IEEE-1588
- Generally, for any IEEE-1588 applications key oscillator parameters are:
- Standard frequency stability (Frequency vs. Temperature and Aging).
- Phase Noise and Jitter
- Short and Medium term stability (ADEV or MTIE/TDEV).
- In some less sync constrained IEEE-1588 applications the standard Ethernet type XO with ±20ppm frequency stability is good enough.
- More sync constrained IEEE-1588 applications such as Telecom, Audio and video networks requires oscillators that meet specific short and medium term stability.
- Telecommunication wire line applications requirements are defined by industry synchronization standards such as:
- Telcordia GR-1244, GR-253,
- ITU-T G.812/G.813,
- ITU-T G.8261/G.826
- Telecommunication wireless applications requirements are defined by system requirements such as:
- LTE frequency accuracy 50ppb, time accuracy 3-10µs
- WiMAX frequency accuracy 50ppb, time accuracy 5-25µs
- Audio and Video has to conform with IEEE 802.1AS-2011