SiT3921 Preliminary Digitally Controlled Differential Oscillator (DCXO) The Smart Timing Choice The Smart Timing Choice Features Applications Factory programmable between 1 MHz and 220 MHz accurate to 6 Ideal for SONET, Video, Instrumentation, Satellite applications decimal places Digital controlled pull range Telecom, networking, broadband Widest pull range options: 25, 50, 100, 200, 400, 800, 1600 PPM Superior pull range linearity of <= 1%, 10 times better than quartz < 1ps RMS phase jitter (random) over 12 kHz to 20 MHz bandwidth Industrial and extended commercial temperature ranges Industry-standard packages: 5.0 mm x 3.2 mm and 7.0 mm x 5.0 mm Contact SiTime for 3.2 mm x 2.5 mm package For frequencies higher than 220 MHz, refer to SiT3922 datasheet Electrical Characteristics Parameter and Conditions Symbol Min. Typ. Max. Unit Condition LVPECL and LVDS, Common DC and AC Characteristics Output Frequency Range f 1 220 MHz Frequency Stability F stab -10 +10 PPM Inclusive of initial tolerance, operating temperature, rated power, supply voltage and load change -25 +25 PPM -50 +50 PPM Operating Temperature Range T use -40 +85 C Industrial -20 +70 C Extended Commercial Start-up Time T start 10 ms Duty Cycle DC 45 55 % Contact SiTime for tighter duty cycle Pull Range PR 25, 50, 100, PPM See the last page for Absolute Pull Range, APR table 200, 400, 800, 1600 Linearity Lin 0.2 1 % Frequency Change Polarity Positive Slope 1-year Aging -2 +2 PPM First year 25C 10-year Aging -5 +5 PPM 85C Input Low Voltage VIL 0.2xVdd V Input Middle Voltage VIM 0.4xVdd 0.6xVdd V Input High Voltage VIH 0.8xVdd V Input High or Low Pulse Width T logic 500 ns Input Middle Pulse Width T middle 500 ns Input to Output Isolation TBD Input Impedance Zin TBD k Pin 1 Input Capacitance Cin TBD pF Pin 1 LVPECL, DC and AC Characteristics Supply Voltage Vdd 2.97 3.3 3.63 V 2.25 2.5 2.75 V Current Consumption Idd 61 69 mA Excluding Load Termination Current, Vdd = 3.3V or 2.5V Maximum Output Current I-driver 30 mA Maximum average current drawn from OUT+ or OUT- Output High Voltage VOH Vdd-1.1 Vdd-0.7 V See Figure 9 Output Low Voltage VOL Vdd-1.9 Vdd-1.5 V See Figure 9 Output Differential Voltage Swing V Swing 1.2 1.6 2.0 V See Figure 9 Rise/Fall Time Tr, Tf 300 500 ps 20% to 80% OE Enable/Disable Time T oe 105 ns f = 220 MHz - For other frequencies, T oe = 100ns + 3 period RMS Period Jitter T jitt 1.2 1.7 ps f = 100 MHz, VDD = 3.3V or 2.5V 1.2 1.7 ps f = 156.25 MHz, VDD = 3.3V or 2.5V 1.2 1.7 ps f = 212.5 MHz, VDD = 3.3V or 2.5V RMS Phase Jitter (random) T phj 0.5 0.75 ps f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all Vdds SiTime Corporation 990 Almanor Avenue Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com Rev. 0.1 Revised March 27, 2012SiT3921 Digitally Controlled Differential Oscillator (DCXO) The Smart Timing Choice The Smart Timing Choice Electrical Characteristics Parameter and Conditions Symbol Min. Typ. Max. Unit Condition LVDS, DC, and AC Characteristics Supply Voltage Vdd 2.97 3.3 3.63 V 2.25 2.5 2.75 V Current Consumption Idd 47 55 mA Excluding Load Termination Current, Vdd = 3.3V or 2.5V Differential Output Voltage VOD 200 350 500 mV See Figure 12 VOD Magnitude Change 50 mV See Figure 12 VOD Offset Voltage VOS 1.125 1.2 1.375 V See Figure 12 VOS Magnitude Change VOS 50 mV See Figure 12 Rise/Fall Time Tr, Tf 360 495 600 ps 20% to 80% OE Enable/Disable Time T oe 105 ns f = 220 MHz - For other frequencies, T oe = 100ns + 3 period RMS Period Jitter T jitt 1.2 1.7 ps f = 100 MHz, VDD = 3.3V or 2.5V 1.2 1.7 ps f = 156.25 MHz, VDD = 3.3V or 2.5V 1.2 1.7 ps f = 212.5 MHz, VDD = 3.3V or 2.5V RMS Phase Jitter (random) T phj 0.5 0.75 ps f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all Vdds Pin Description Pin Map Functionality Top View 1 DP Input Digital programming pin DP 1 6 VDD 2 NC NA No connect 3 GND Power VDD power supply ground NC 2 5 OUT- 4 OUT+ Output Oscillator output 5 OUT- Output Complementary oscillator output 3 4 GND OUT+ 6 VDD Power Power supply voltage Absolute Maximum Attempted operation outside the absolute maximum ratings of the part may cause permanent damage to the part. Actual perfor- mance of the IC is only guaranteed within the operational specifications, not at absolute maximum ratings. Parameter Min. Max. Unit Storage Temperature -65 150 C VDD -0.5 4 V Electrostatic Discharge 2000 V Soldering Temperature (follow standard Pb free soldering guidelines) 260 C Program Retention over -40 to 125C, Process, VDD (0 to 3.65V) 1,000+ years Environmental Compliance Parameter Condition/Test Method Mechanical Shock MIL-STD-883F, Method 2002 Mechanical Vibration MIL-STD-883F, Method 2007 Temperature Cycle JESD22, Method A104 Solderability MIL-STD-883F, Method 2003 Moisture Sensitivity Level MSL1 260C Rev. 0.3 Page 2 of 10 www.sitime.com