SiT9120
Standard Frequency Differential Oscillator
The Smart Timing Choice
The Smart Timing Choice
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
0.6 ps RMS phase jitter (random) over 12 kHz to 20 MHz bandwidth Telecom, networking, instrumentation, storage, servers
Frequency stability as low as 10 ppm
Industrial and extended commercial temperature ranges
Industry-standard packages: 3.2x2.5, 5.0x3.2 and 7.0x5.0 mmxmm
For any other frequencies between 1 to 625 MHz, refer to SiT9121
and SiT9122 datasheet
Electrical Characteristics
Parameter and Conditions 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 last page for list of standard frequencies
Frequency Stability F_stab -10 +10 ppm
-20 +20 ppm
Inclusive of initial tolerance, operating temperature, rated power
supply voltage, and load variations
-25 +25 ppm
-50 +50 ppm
First Year Aging F_aging1 -2 +2 ppm 25C
10-year Aging F_aging10 -5 +5 ppm 25C
T_use -40 +85 C Industrial
Operating Temperature Range
-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
Start-up Time T_start 6 10 ms Measured from the time Vdd reaches its rated minimum value.
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
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 30 mA Maximum average current drawn from OUT+ or OUT-
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
LVDS, DC and AC Characteristics
Current Consumption Idd 47 55 mA Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE Disable Supply Current I_OE 35 mA OE = Low
Differential Output Voltage VOD 250 350 450 mV See Figure 2
SiTime Corporation 990 Almanor Avenue, Sunnyvale, CA 94085 (408) 328-4400 www.sitime.com
Rev. 1.06 Revised October 3, 2014SiT9120
Standard Frequency Differential Oscillator
The Smart Timing Choice
The Smart Timing Choice
Electrical Characteristics (continued)
Parameter and Conditions Symbol Min. Typ. Max. Unit Condition
LVDS, DC and AC Characteristics (continued)
Output Disable Leakage Current I_leak 1 A OE = Low
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
Pin Description
Pin Map Functionality
H or Open: specified frequency output
OE Input
L: output is high impedance Top View
1
H or Open: specified frequency output
ST Input L: Device goes to sleep mode. Supply current reduces to OE/ST 1 6 VDD
I_std.
No Connect; Leave it floating or connect to GND for better
2 5
NC OUT-
2NC NA
heat dissipation
3 GND Power VDD Power Supply Ground
GND 3 4 OUT+
4 OUT+ Output Oscillator output
5 OUT- Output Complementary oscillator output
6 VDD Power Power supply voltage
Absolute Maximum
Attempted operation outside the absolute maximum ratings of the part may cause permanent damage to the part. Actual perfor-
mance of the IC is only guaranteed within the operational specifications, not at absolute maximum ratings.
Parameter Min. Max. Unit
Storage Temperature -65 150 C
VDD -0.5 4 V
Electrostatic Discharge (HBM) 2000 V
Soldering Temperature (follow standard Pb free soldering guidelines) 260 C
Thermal Consideration
JA, 4 Layer Board JC, Bottom
Package (C/W) (C/W)
7050, 6-pin 142 27
5032, 6-pin 97 20
3225, 6-pin 109 20
Environmental Compliance
Parameter Condition/Test Method
Mechanical Shock MIL-STD-883F, Method 2002
Mechanical Vibration MIL-STD-883F, Method 2007
Temperature Cycle JESD22, Method A104
Solderability MIL-STD-883F, Method 2003
Moisture Sensitivity Level MSL1 @ 260C
Rev. 1.06 Page 2 of 8 www.sitime.com