SiTime Corporation 990 Almanor Avenue Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com
Rev. 1.0 Revised November 11, 2010
SiT8004
Low Power Oscillator for High Frequency Applications
■ Lowest power, high frequency oscillator with 6.3 mA typical active current
■ 125MHz to 150MHz frequency range
■ LVCMOS/LVTTL compatible output
■ Excellent frequency stability over temperature, ±20 PPM
■ Ultra low standby current, 1.2 µA
■ Standby or output enable modes
■ Four industry-standard packages: 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2, 7.0 x 5.0 mm
■ Drop-in replacement of quartz
■ Ultra short lead time
■ All-silicon device with outstanding reliability of 2 FIT (10x improvement over quartz-based devices),
enhancing system mean-time-to-failure (MTBF)
■ Ideal for high frequency applications in networking, storage, computer servers and communications
■ Ideal for high speed protocals: GPON, EPON, Ethernet, SATA/SAS, DDR, PCI
Electrical Characteristics
Parameter Symbol Min. Typ. Max. Unit Condition
Output Frequency Range f 125 - 150 MHz
Frequency Stability F_stab -20 – +20 PPM Inclusive of: Initial stability, operating temperature, rated power,
supply voltage change, load change, shock and vibration
± 20 PPM available in extended commercial temperature only
-25 – +25 PPM
-50 – +50 PPM
Aging Ag –1.0 – 1.0 PPM 1st year at 25°C
Operating Temperature Range T_use -20 – +70 °C Extended Commercial
-40 – +85 °C Industrial
Supply Voltage Vdd 2.25 2.5 2.75 V
2.52 2.8 3.08 V
2.97 3.3 3.63 V
Current Consumption Idd – 6.7 8 mA No load condition, f = 125 MHz, Vdd = 3.3 V
– 6.2 7 mA No load condition, f = 125 MHz, Vdd = 2.5 V or 2.8 V
Standby Current I_std – 2.4 4.3 µA ST = GND, Vdd = 3.3 V, Output is Weakly Pulled Down
– 1.2 2.2 µA ST = GND, Vdd = 2.5 or 2.8 V, Output is Weakly Pulled Down
Duty Cycle DC 40 50 60 % All Vdds
Rise/Fall Time Tr, Tf – 1 2 ns 20% - 80% Vdd=2.5 V, 2.8 V or 3.3 V, 15 pf load
Output Voltage High VOH 90% – – Vdd IOH = -4 mA (Vdd = 3.3 V)
IOH = -3 mA (Vdd = 2.8 V and Vdd = 2.5 V)
Output Voltage Low VOL – – 10% Vdd IOL = 4 mA (Vdd = 3.3 V)
IOL = 3 mA (Vdd = 2.8 V and Vdd = 2.5 V)
Output Load Ld – – 15 pF At 125MHz and max supply voltage. Contact SiTime for higher output
load option
Input Voltage High VIH 70% – – Vdd Pin 1, OE or ST
Input Voltage Low VIL – – 30% Vdd Pin 1, OE or ST
Startup Time T_start – – 10 ms Measured from the time Vdd reaches its rated minimum value
Resume Time T_resume – 3.0 3.8 ms Measured from the time ST pin crosses 50% threshold
RMS Period Jitter T_jitt – – 4.5 ps f = 125 MHz, Vdd = 2.5 V, 2.8 V or 3.3 V
RMS Phase Jitter (random) T_phj – 0.5 – ps f = 125 MHz, Integration bandwidth = 900 kHz to 7.5 MHz,
VDD = 2.5 V, 2.8 V, or 3.3 V
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Features, Benefits and Applications
