SiT9120 Standard Frequency Differential Oscillator Features Applications 31 standard frequencies from 25 MHz to 212.5 MHz 10GB Ethernet, SONET, SATA, SAS, Fibre Channel, PCI-Express LVPECL and LVDS output signaling types Telecom, networking, instrumentation, storage, server 0.6 ps RMS phase jitter (random) over 12 kHz to 20 MHz bandwidth Frequency stability as low as 10 ppm Industrial and extended commercial temperature ranges Industry-standard packages: 3.2 x 2.5, 5.0 x 3.2 and 7.0 x 5.0 mm x mm For any other frequencies between 1 to 625 MHz, refer to SiT9121 and SiT9122 datasheet Electrical Characteristics Table 1. Electrical Characteristics Parameters Symbol Min. Typ. Max. Unit Condition LVPECL and LVDS, Common Electrical Characteristics Supply Voltage Vdd 2.97 3.3 3.63 V 2.25 2.5 2.75 V 2.25 3.63 V Termination schemes in Figures 1 and 2 - XX ordering code Output Frequency Range f 25 212.5 MHz See list of standard frequencies Frequency Stability F stab -10 +10 ppm Inclusive of initial tolerance, operating temperature, rated power supply voltage, and load variations -20 +20 ppm -25 +25 ppm -50 +50 ppm First Year Aging F aging1 +2 ppm 25C -2 10-year Aging F aging10 -5 +5 ppm 25C Operating Temperature Range T use +85 C Industrial -40 -20 +70 C Extended Commercial Input Voltage High VIH Vdd 70% Pin 1, OE or ST Input Voltage Low VIL 30% Vdd ST Pin 1, OE or Input Pull-up Impedance Z in 100 250 k Pin 1, OE logic high or logic low, or ST logic high M 2 Pin 1, ST logic low Start-up Time T start 6 10 ms Measured from the time Vdd reaches its rated minimum value. Resume Time T resume 6 10 ms In Standby mode, measured from the time ST pin crosses 50% threshold. Duty Cycle DC 55 % Contact SiTime for tighter duty cycle 45 LVPECL, DC and AC Characteristics Current Consumption Idd 61 69 mA Excluding Load Termination Current, Vdd = 3.3V or 2.5V OE Disable Supply Current I OE 35 mA OE = Low Output Disable Leakage Current I leak 1 A OE = Low Standby Current I std 100 A ST = Low, for all Vdds Maximum Output Current I driver Maximum average current drawn from OUT+ or OUT- 30 mA Output High Voltage VOH Vdd-1.1 Vdd-0.7 V See Figure 1(a) Output Low Voltage VOL Vdd-1.9 Vdd-1.5 V See Figure 1(a) Output Differential Voltage Swing V Swing 1.2 1.6 2.0 V See Figure 1(b) Rise/Fall Time Tr, Tf 300 500 ps 20% to 80%, see Figure 1(a) OE Enable/Disable Time T oe 115 ns f = 212.5 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 0.6 0.85 ps f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all Vdds Rev 1.08 June 25, 2019 www.sitime.com SiT9120 Standard Frequency Differential Oscillator Table 1. Electrical Characteristics (continued) Parameter Symbol Min. Typ. Max. Unit Condition LVDS, DC and AC Characteristics Current Consumption Idd Excluding Load Termination Current, Vdd = 3.3V or 2.5V 47 55 mA OE Disable Supply Current I OE 35 mA OE = Low Differential Output Voltage VOD See Figure 2 250 350 450 mV Output Disable Leakage Current I leak 1 OE = Low A Standby Current I std 100 A ST = Low, for all Vdds VOD Magnitude Change VOD 50 mV See Figure 2 Offset Voltage VOS 1.125 1.2 1.375 V See Figure 2 VOS Magnitude Change VOS 50 mV See Figure 2 Rise/Fall Time Tr, Tf 495 600 ps 20% to 80%, see Figure 2 OE Enable/Disable Time T oe 115 ns f = 212.5 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 0.6 0.85 ps f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all Vdds Table 2. Pin Description Pin Map Functionality Top View No Connect Leave it floating or connect to GND NC NA for better heat dissipation VDD NC/OE/ST 1 6 H or Open: specified frequency output OE Input 1 L: output is high impedance H or Open: specified frequency output NC 2 5 OUT- Input ST L: Device goes to sleep mode. Supply current reduces to I std. No Connect Leave it floating or connect to GND for better heat 2 NC NA 3 4 GND OUT+ dissipation 3 GND Power VDD Power Supply Ground 4 OUT+ Output Oscillator output Figure 1. Pin Assignments 5 OUT- Output Complementary oscillator output 6 VDD Power Power supply voltage Rev 1.08 Page 2 of 13 www.sitime.com