OCXO (Oven Controlled Crystal Oscillators) +5.0V; +12V OC31T Series HCMOS Square Wave MERCURY Since 1973 Mercury OC31T is 36.2x27.2 mm 5 pin solder sealed metal pacakge with 25.4x17.8 mm pin-to-pin spacing high stability low aging OCXO. Besides standard AT cut crystal, users can also choose SC cut crystal for better performance. 50 ohm load sine output is available as OC31E series. OC30T series: Same package size as OC31T but with different pin configurations. General Specifications ( 10 MHz at+25°C, at specified Vcc and +2.5 V Vcon) HCMOS square wave. Wave form code is “T” 1.25 MHz ~100.0 MHz AT-cut. Use “A” for crystal code or SC-cut: use “S” for crystal code. Type of Crystal Cut Used SC has better performance but higher cost. See technical note TN-031. Supply Voltage (Vcc) +5.0 V D.C ±5% (voltage code is “5”); +12.0 V D.C ±5% (voltage code is “12”) ±0.5 ppm max. at time of shipment; Vcon=+2.5V, at +25°C Initial Calibration Tolerance Best Stability 0°C to +60°C -20°C to +70°C -40°C to +85°C Operating Temperature Range ±0.03 ppm ±0.08 ppm ±0.2 ppm For AT crystal (custom spec. on request) ±0.01 ppm ±0.02 ppm ±0.03 ppm For SC crystal Aging (after 72 hours of AT:±3 ppb max./day; ±0.5 ppm max./first year;±3 ppm max. over 10 years. continuous operation) SC: ±2 ppb max./day; ±0.1 ppm max./first year;±0.5 ppm max. over 10 years. Supply Voltage ±5% Variation ±20 ppb max. ±20 ppb max. Load ±5% variation: AT: 3 minutes max. Within ±0.5 ppm of its reference frequency. Warm-up time (at +25°C) SC: 1 minute max. Within ±0.1 ppm of its reference frequency. Referenced to fo at +25°C and over AT: ±5 ppm min. ±20 ppm max.; Freq. Deviation Range operating temperature range. SC: ±0.5 ppm min, ±2 ppm max. 2.5 V ± 2.0 V Control Voltage Range Voltage Control on pin 1 (EFC) (Electronics Frequency Tuning) Frequency Stability vs Output Wave Form Frequency Range Power Output Transfer Function Positive: Increasing control voltage increases output frequency. Input Impedance Load (Fan out) 100 K ohms min. ±10% max. EFC Linearity +5.0 V units: 200 mA max. at steady-state; 500 mA max. at turn-on. +12.0 V units: 120 mA max. at steady-state; 250 mA max. at turn-on. 15 pF HCMOS max. Duty Cycle (measured at 50%Vcc) 50% ± 10% Output Voltage Logic High (VOH) +4.5 V min. Rise and Fall Time 5 nS max. (measured at 20% ⇄ 80% of waveform) Reference Voltage Output +4.0 V D.C±0.3 V D.C. or custom. Power Dissipation (at +25°C) Phase Noise Output Voltage Logic Low (VOL) +0.5 max. Offset 1 Hz 10 Hz 100 Hz 1 KHz 10 KHz 10 MHz AT-cut XTAL -75 dBc -100 dBc -130 dBc -140 dBc -150 dBc 10 MHz SC-cut XTAL -85 dBc -120 dBc -140 dBc -145 dBc -150 dBc Storage Temperature -55°C to +125°C Shock 2000 G’s, 0.3 ms ½ sine Vibration 10 to 2000 Hz / 10 G’s MERCURY www.mercury-crystal.com Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: [email protected] U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: [email protected] MERCURY Page 1 of 2 Date: July 20, 2006 Rev. 0 OCXO (Oven Controlled Crystal Oscillators) +5.0V; +12V OC31T Series HCMOS Square Wave MERCURY Since 1973 OC31T Test Circuit Bottom view T2 Frequency counter T1 A + - Vcc Oscilloscope + V - 80% 50% 0.1uF 20% Vcon 15 pF + - * Tr * Include probe, fixture and stray capacitances OC31T Series Package Dimensions and Pin Connections: Pin 1: Voltage Control EFC Pin 2: Reference Voltage Output Pin 4: RF Output Pin 5: Ground / Case Tf Duty Cycle = T1 *100% T2 unit mm Pin 3: Supply Voltage Part Number Format and Example: Example: OC31T5S-10.000-0.01/-20+70 OC 31 T 5 S — 10.000 — 0.01 ⁄ slash dash n o p q r dash s t n: “OC” Product Prefix for OCXO o: Package type. “31” for OC31 package p: Output wave form code. “T” for HCMOS square wave output.. q: Supply voltage code. “5” for +5.0V; “12” for +12.0V r: Crystal type. Use “A” for AT-cut crystal; Use “S” for SC-cut crystal. s: Frequency in MHz; t: Frequency stability in ppm; u: Operating temperature range: -20°C to +70°C in this case. MERCURY Page 2 of 2 Date: July 20, 2006 -20+70 u Rev. 0