The Smart Timing Choice
The Smart Timing Choice
SiTime Corporation 990 Almanor Avenue, Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com
Rev. 1.0 Revised January 4, 2014
SiT1618
Standard Frequency, High Temperature Oscillator
Features Applications
33 standard frequencies between 7.3728 MHz and 48 MHz Industrial, medical, automotive, avionics and other high
temperature applications
Supply voltage of 1.8V or 2.5V to 3.3V
Operating temperature from -40°C to 125°C. For -55°C option, refer
to SiT8920 and SiT8921
Industrial sensors, PLC, motor servo, outdoor networking
equipment, medical video cam, asset tracking systems, etc.
Excellent total frequency stability as low as ±20 ppm
Low power consumption of 3.4 mA typical at 1.8V
LVCMOS/LVTTL compatible output
Industry-standard packages: 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5, 5.0 x 3.2,
7.0 x 5.0 mm x mm
Instant samples with Time Machine II and field programmable
oscillators
RoHS and REACH compliant, Pb-free, Halogen-free and
Antimony-free
For AEC-Q100 oscillators, refer to SiT8924 and SiT8925
Electrical Specifications
Table 1. Electrical Characteristics
[1, 2]
Parameters Symbol Min. Typ. Max. Unit Condition
Frequency Range
Output Frequency Range f 33 standard frequencies between
7.3728 MHz and 48 MHz
MHz Refer to Table 13 for the exact list of supported frequencies
Frequency Stability and Aging
Frequency Stability F_stab -20 – +20 ppm Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and
variations over operating temperature, rated power supply
voltage and load (15 pF ± 10%).
-25 – +25 ppm
-30 – +30 ppm
-50 – +50 ppm
Operating Temperature Range
Operating Temperature Range
(ambient)
T_use -40 – +105 °C Extended Industrial
-40 – +125 °C Automotive
Supply Voltage and Current Consumption
Supply Voltage Vdd 1.62 1.8 1.98 V
2.25 2.5 2.75 V
2.52 2.8 3.08 V
2.7 3.0 3.3 V
2.97 3.3 3.63 V
2.25 – 3.63 V
Current Consumption Idd – 3.8 4.5 mA No load condition, f = 20 MHz, Vdd = 2.8V, 3.0V or 3.3V
– 3.6 4.2 mA No load condition, f = 20 MHz, Vdd = 2.5V
– 3.4 4 mA No load condition, f = 20 MHz, Vdd = 1.8V
OE Disable Current I_od – – 4.1 mA Vdd = 2.5V to 3.3V, OE = Low, output in high Z state.
– – 3.8 mA Vdd = 1.8V, OE = Low, output in high Z state.
Standby Current I_std – 2.6 8.5 A Vdd = 2.8V to 3.3V, ST
= Low, Output is Weakly Pulled Down
–1.45.5A Vdd = 2.5V, ST
= Low, Output is Weakly Pulled Down
–0.63.5A Vdd = 1.8V, ST
= Low, Output is Weakly Pulled Down
LVCMOS Output Characteristics
Duty Cycle DC 45 – 55 % All Vdds
Rise/Fall Time Tr, Tf – 1.0 2.0 ns Vdd = 2.5V, 2.8V, 3.0V or 3.3V, 20% - 80%
– 1.3 2.5 ns Vdd =1.8V, 20% - 80%
– 1.0 3 ns Vdd = 2.25V - 3.63V, 20% - 80%
Output High Voltage VOH 90% – – Vdd IOH = -4 mA (Vdd = 3.0V or 3.3V)
IOH = -3 mA (Vdd = 2.8V or 2.5V)
IOH = -2 mA (Vdd = 1.8V)
Output Low Voltage VOL – – 10% Vdd IOL = 4 mA (Vdd = 3.0V or 3.3V)
IOL = 3 mA (Vdd = 2.8V or 2.5V)
IOL = 2 mA (Vdd = 1.8V)
