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MSTM Series Synchronous Output Frequency Reference Input Frequency Temperature Range Voltage Free Run Accuracy Hold Over Stability (total deviation) Stratum Level (GR1244) 8kHz - 125MHz 8kHz 0 - 70°c 5 Volts 4.6 ±ppm 0.37 ppm 3 Model Number Specifications: MSTM-S3 MSTM Base Model. 8kHz, 16.384MHz, 19.44MHz, or 77.76MHz outputs standard. 1.544MHz - 38.8MHz fixed reference clock output. MSTM-S3-T2NC No fixed reference clock output. MSTM-S3-IT3 19.44MHz synchronized output frequency. Industrial Temperature Range (-40 - 85°c) MSTM-S3-T2F1 Active and standby reference qualification. Standard 19.44MHz input reference. MSTM-S3-TR TF and Raltron replacement. Additional Stratum Level Models: MSTM-S4E Stratum Level 4E. 1.544MHz - 38.8MHz fixed reference clock output. ±32ppm free run accuracy and hold over stability. MSTM-SEC1 Stratum Level ITU-T-G.813-1. ±2ppm hold over stability. STM Series Synchronous Output Frequency Reference Input Frequency Temperature Range Voltage Free Run Accuracy Hold Over Stability (total deviation) Stratum Level (GR1244) 1.544MHz - 125MHz 8kHz 0 - 70°c 3.3 or 5 Volts 4.6 ±ppm 0.37 ppm 3 Model Number Specifications: STM-S3E Stratum 3E jitter, wander and hold over performance - S3E phase build out. SM3 Series Synchronous Output Frequency Reference Input Frequency Temperature Range Voltage Free Run Accuracy Hold Over Stability (total deviation) Stratum Level (GR1244) 8KHz - 155.52MHz 8kHz - 77.76MHz 0 - 70°c 3.3 Volts 4.6 ±ppm 0.37 ppm 3 Model Number Specifications: SM3 Base Stratum 3 model. TCXO based. 1.0 x 1.5 x 0.25 inches. 4 autofrequency detect inputs. SPI controlled. SM3-IT Industrial temperature version. SM3-8R Larger SM3 Model. 8 reference inputs. OCXO based for commercial or industrial temps. SM3E Series Synchronous Output Frequency Reference Input Frequency Temperature Range Voltage Free Run Accuracy Hold Over Stability (total deviation) Stratum Level (GR1244) 8KHz - 155.52MHz 8kHz - 77.76MHz 0 - 70°c 3.3 Volts 4.6 ±ppm 0.12 ppm 3E Model Number Specifications: SM3E Base Stratum 3E model. 1.5 x 2.0 x 0.75 inches. 8 auto frequency detect outputs. SPI controlled. STC Series Synchronous Output Frequency Reference Input Frequency Temperature Range Voltage Stratum Level Package Type 8KHz - 155.52MHz 8kHz - 77.76MHz CT, IT 3.3 Volts S3 or S3E IC Model Number Specifications: STC3500 8 inputs and 4 outputs. Stratum 3 timing systems. STC3800 8 inputs and 4 outputs. Stratum 3E timing systems. STC4130 12 inputs and 10 outputs. T0 and T4 PLL. Stratum 3 timing systems. STC5130 12 inputs and 10 outputs. For SDH SETS, SONET Stratum 3, 4, 4E, and Syncronous Ethernet. STC5170 2 inputs and 2 outputs. For SDH SETS, SONET Stratum 3, 4, 4E, and Syncronous Ethernet. Package Specifications MSTM Package   STM Package   SM3 Package  Inches: 2" x 2" x 0.56"  Metric: 50.8 x 50.8 x 14.2mm    Inches: 2.5" x 4" x 0.62"  Metric: 63.5 x 101.6 x 15.7mm    Inches: 1.45" x 1" x 0.25"  Metric: 36.8 x 25.4 x 6.35mm