SiT9121 1 MHz 220 MHz High Performance Differential Oscillator Features Applications Any frequency between 1 MHz and 220 MHz accurate 10 GB Ethernet, SONET, SATA, SAS, Fibre Channel, PCI-Express to 6 decimal places Telecom, networking, instrumentation, storage, server LVPECL and LVDS output signaling types 0.6ps 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 other frequencies, refer to SiT9120 and SiT9122 datasheets Electrical Characteristics Table 1. Electrical Characteristics Parameters Symbol Min. Typ. Max. Unit Condition LVPECL and LVDS, Common Electrical Characteristics 2.97 3.3 3.63 V Supply Voltage Vdd 2.25 2.5 2.75 V 2.25 3.63 V Termination schemes in Figures 1 and 2 - XX ordering code 1 220 MHz Output Frequency Range f 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 +2 ppm 25C 10-year Aging -5 +5 ppm 25C F aging10 -40 +85 C Industrial Operating Temperature Range T use -20 +70 C Extended Commercial Input Voltage High VIH 70% Vdd Pin 1, OE or ST Input Voltage Low VIL 30% Vdd Pin 1, OE or ST Input Pull-up Impedance Z in 100 250 k Pin 1, OE logic high or logic low, or ST logic high 2 M Pin 1, ST logic low Measured from the time Vdd reaches its rated minimum value. Start-up Time T start 6 10 ms In Standby mode, measured from the time ST pin crosses Resume Time T resume 6 10 ms 50% threshold. Duty Cycle DC 45 55 % Contact SiTime for tighter duty cycle LVPECL, DC and AC Characteristics Excluding Load Termination Current, Vdd = 3.3V or 2.5V Current Consumption Idd 61 69 mA OE Disable Supply Current I OE 35 mA OE = Low Output Disable Leakage Current 1 A OE = Low I leak Standby Current I std 100 A ST = Low, for all Vdds Maximum average current drawn from OUT+ or OUT- Maximum Output Current I driver 30 mA Output High Voltage VOH Vdd-1.1 Vdd-0.7 V See Figure 1(a) Output Low Voltage Vdd-1.9 Vdd-1.5 V See Figure 1(a) VOL 1.2 1.6 2.0 V See Figure 1(b) Output Differential Voltage Swing V Swing Rise/Fall Time Tr, Tf 300 700 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 1.2 1.7 ps f = 100 MHz, VDD = 3.3V or 2.5V RMS Period Jitter T jitt 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 f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, RMS Phase Jitter (random) T phj 0.6 0.85 ps all Vdds Rev 1.08 August 17, 2019 www.sitime.com SiT9121 1 MHz 220 MHz High Performance Differential Oscillator Table 1. Electrical Characteristics (continued) Parameter Symbol Min. Typ. Max. Unit Condition LVDS, DC and AC Characteristics 47 55 mA Excluding Load Termination Current, Vdd = 3.3V or 2.5V Current Consumption Idd OE Disable Supply Current I OE 35 mA OE = Low Differential Output Voltage 250 350 450 mV See Figure 2 VOD Output Disable Leakage Current I leak 1 A OE = Low Standby Current 100 I std A ST = Low, for all Vdds Delta VOD VOD 50 mV See Figure 2 Offset Voltage VOS 1.125 1.2 1.375 V See Figure 2 Delta VOS VOS 50 mV See Figure 2 Rise/Fall Time Tr, Tf 495 700 ps 20% to 80%, see Figure 2 T oe 115 ns f = 212.5 MHz - For other frequencies, T oe = 100ns + 3 period OE Enable/Disable Time RMS Period Jitter 1.2 1.7 ps f = 100 MHz, VDD = 3.3V or 2.5V T jitt 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 NC/OE/ST 1 6 VDD H or Open: specified frequency output OE Input 1 L: output is high impedance H or Open: specified frequency output 2 5 NC 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 GND 3 4 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