MSTM-S3-TR-16.384M

Overview

The Connor-Winfield MSTM-S3-TR-16.384M is a Stratum 3 timing module designed for Ethernet and general synchronization applications compliant with GR-1244 Issue 2 and GR-253 Issue 3. Operating on a 5V supply (4.75V to 5.25V), it provides redundant reference inputs and two synchronous outputs ranging from 8 kHz to 77.76 MHz. The module features a 40-second filtered holdover history, operational status flags, and alarm outputs. It supports four operating states: Holdover, External Reference #1, External Reference #2, and Free Run, utilizing a Digital Phase-Locked Loop (DPLL) with less than 0.1 Hz bandwidth.

Feature Summary

• Stratum 3 compliance with GR-1244 Issue 2 and GR-253 Issue 3 standards
• Dual redundant external reference inputs (8 kHz - 19.44 MHz)
• Two synchronous outputs (Sync_Out and Opt_Out) selectable from 8 kHz to 77.76 MHz
• 40-second filtered holdover history with ±0.37 ppm stability for the initial 24 hours

Applications

• Ethernet system clock modules
• Stratum 3 timing applications in telecommunications
• BITS (Building Integrated Timing Supply) systems

Procurement Notes

Verify the specific input reference frequency configuration required for the design. The part number suffix indicates the primary output frequency; ensure the selected variant matches the target system clock requirements. Confirm that the host power supply can deliver the peak current of approximately 400 mA during the OCXO warm-up phase.

Selection Notes

Select this module when a complete Stratum 3 timing solution is needed to replace legacy units like the TF Systems TF118B or Raltron SY0001B. Ensure the application requires TTL/CMOS compatible control signals for mode selection. Verify that the operating temperature range of 0°C to 50°C meets the environmental constraints, as higher ranges may require different thermal management or variants.

Part Context

This component belongs to the MSTM-S3 series of simplified control timing modules manufactured by Connor-Winfield. These modules are engineered to minimize development time while providing full external control over operating states. The series is specifically tailored for network synchronization equipment requiring high stability and jitter attenuation.

Replacement Considerations

Publicly confirmed substitutes include the TF Systems TF118B and the Raltron SY0001B.