SiT9121
1-220 MHz High Performance Differential Oscillator
The Smart Timing Choice
Features Applications
Any frequency between 1 MHz and 220 MHz accurate to 6 decimal 10GB Ethernet, SONET, SATA, SAS, Fibre Channel,
places PCI-Express
LVPECL and LVDS output signaling types Telecom, networking, instrumentation, storage, servers
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: 3.2x2.5, 5.0x3.2 and 7.0x5.0 mmxmm
For frequencies higher than 220 MHz, refer to 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
1 220 MHz
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
Operating Temperature Range T_use
-40 +85 C Industrial
-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
Resume Time
T_resume
6 10 ms
crosses 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
A OE = Low
1
Standby Current I_std
100 A = Low, for all Vdds
ST
Maximum Output Current I_driver
Maximum average current drawn from OUT+ or OUT-
30 mA
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
300 700 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
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 f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all
0.6 0.85 ps
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. 1.07 Revised January 4, 2016
SiT9121
1-220 MHz High Performance Differential Oscillator
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
495 700 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 f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz, all
0.6 0.85 ps
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-
2 NC 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 may cause permanent damage to the part. Actual performance 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. 1.07 Page 2 of 8 www.sitime.com