SiT8009B
High Frequency, Low Power Oscillator
ow Power, Standard Frequency Oscillator
Features Applications
100% pin-to-pin drop-in replacement to quartz-based XO Ideal for GPON/GPON, network switches, routers.
Excellent total frequency stability as low as 20 ppm servers, embedded systems
Operating temperature from -40C to 85C. For 125C and/or Ideal for Ethernet, PCI-E, DDR, etc.
-55C options, refer to SiT8919 and SiT8921
Low power consumption of 4.9 mA typical at 1.8V
Standby mode for longer battery life
Fast startup time of 5 ms
LVCMOS/HCMOS 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 Characteristics
All Min and Max limits are specified over temperature and rated operating voltage with 15 pF output load unless otherwise
stated. Typical values are at 25C and nominal supply voltage.
Table 1. Electrical Characteristics
Parameters Symbol Min. Typ. Max. Unit Condition
Frequency Range
Output Frequency Range
f 115 137 MHz
Frequency Stability and Aging
Frequency Stability F_stab Inclusive of Initial tolerance at 25C, 1st year aging at 25C, and
-20 +20 ppm
variations over operating temperature, rated power supply
-25 +25 ppm
voltage and load.
-50 +50 ppm
Operating Temperature Range
Operating Temperature Range T_use -20 +70 C
Extended Commercial
-40 +85 C Industrial
Supply Voltage and Current Consumption
Supply Voltage Vdd Contact SiTime for 1.5V support
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
No load condition, f = 125 MHz, Vdd = 2.8V, 3.0V, 3.3V or 2.25
6.2 7.5 mA
to 3.63V
5.5 6.4 mA No load condition, f = 125 MHz, Vdd = 2.5V
4.9 5.6 mA No load condition, f = 125 MHz, Vdd = 1.8V
OE Disable Current I_OD 4.2 mA Vdd = 2.5V to 3.3V, OE = GND, Output in high-Z state
4.0 mA Vdd = 1.8V, OE = GND, Output in high-Z state
Standby Current I_std
2.6 4.3 A ST = GND, Vdd = 2.8V to 3.3V, Output is weakly pulled down
1.4 2.5 A ST = GND, Vdd = 2.5V, Output is weakly pulled down
0.6 1.3 A
ST = GND, Vdd = 1.8V, Output is weakly pulled down
LVCMOS Output Characteristics
Duty Cycle DC
45 55 % All Vdds
Rise/Fall Time Tr, Tf
1 2 ns Vdd = 2.5V, 2.8V, 3.0V or 3.3V, 20% - 80%
1.3 2.5 ns Vdd =1.8V, 20% - 80%
0.8 2 ns Vdd = 2.25V - 3.63V, 20% - 80%
Output High Voltage VOH 90% Vdd IOH = -4 mA (Vdd = 3.0V or 3.3V)
Output Low Voltage VOL 10% Vdd IOL = 4 mA (Vdd = 3.0V or 3.3V)
Rev 1.04 January 11, 2017 www.sitime.com
SiT8009B High Frequency, Low Power Oscillator
Table 1. Electrical Characteristics (continued)
Parameters Symbol Min. Typ. Max. Unit Condition
Input Characteristics
Input High Voltage VIH 70% Vdd Pin 1, OE or ST
Input Low Voltage VIL 30% Vdd Pin 1, OE or ST
Input Pull-up Impedance Z_in 50 87 150 Pin 1, OE logic high or logic low, or ST logic high
k
2 Pin 1, ST logic low
M
Startup and Resume Timing
5 ms Measured from the time Vdd reaches its rated minimum value
Startup Time T_start
122 ns f = 137 MHz. For other frequencies, T_oe = 100 ns + 3 * cycles
Enable/Disable Time T_oe
5 ms Measured from the time ST pin crosses 50% threshold
Resume Time T_resume
Jitter
1.9 3 ps f = 125 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
RMS Period Jitter T_jitt
1.8 4 ps f = 125 MHz, Vdd = 1.8V
12 25 ps f = 125 MHz, Vdd = 2.5V, 2.8V, 3.0V or 3.3V
Peak-to-peak Period Jitter T_pk
14 30 ps f = 125 MHz, Vdd = 1.8V
0.5 0.9 ps Integration bandwidth = 900 kHz to 7.5 MHz
RMS Phase Jitter (random) T_phj
1.3 2 ps Integration bandwidth = 12 kHz to 20 MHz
Table 2. Pin Description
Pin Symbol Functionality
Top View
[1]
H : specified frequency output
Output Enable
L: output is high impedance. Only output driver is disabled.
[1]
H : specified frequency output
1 4 VDD
OE/ST/NC
1 OE/ST/NC
Standby
L: output is low (weak pull down). Device goes to sleep mode. Supply
current reduces to I_std.
[1]
Any voltage between 0 and Vdd or Open : Specified frequency
No Connect
output. Pin 1 has no function.
2 3 OUT
GND
2 GND Power Electrical ground
3 OUT Output Oscillator output
Figure 1. Pin Assignments
[2]
4 VDD Power Power supply voltage
Notes:
1. In OE or ST mode, a pull-up resistor of 10 k or less is recommended if pin 1 is not externally driven. If pin 1 needs to be left floating, use the NC option.
2. A capacitor of value 0.1 F or higher between Vdd and GND is required.
Rev. 1.04 Page 2 of 17 www.sitime.com