RALTRON OSCILLATORS OPTIMIZED FOR IEEE 1588 PROTOCOL APPLICATIONS

Oscillators for Timing Solutions and Telecom Applications

Crystals and Oscillators

 TX253TX257OX1100OX2100OX3100OX5100OX8100OX4100
ApplicationTCXO
Stratum 3
TCXO
Stratum 3
OCXO
Stratum 3
OCXO
Stratum 3
OCXO
Stratum 3E
OCXO
Stratum 3E
OCXO
Stratum 3E
Master
clock - PRS
Package3.2x5mm5x7mm9x14mm13x20mm36x27mm25x22mm25x25mm50x50mm
Frequencies(MHz)20.000, 24.576, 49.15220.000, 24.576, 49.15220.000, 24.576, 49.152, 98.30420.000, 24.576, 49.152, 98.30420.000, 24.576, 49.152, 98.30420.000, 24.576, 49.152, 98.30420.000, 24.576, 49.152, 98.30420.000, 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 BW100mHz100mHz10mHz10mHz1mHz1mHz1mHz0.5mHz
MTIE [ns]
0.20.20.20.20.20.20.20.2
33221.51.51.51
151512121010108
2020202015151512

TDEV [ns]
0.020.020.020.020.010.010.010.01
0.250.250.150.150.050.050.050.05
221.61.610.90.90.8
665543.73.63.5
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