SiT3373
220 MHz to 725 MHz Ultra-low Jitter Differential VCXO
Features
Any frequency between 220.000001 MHz and 725 MHz
accurate to 6 decimal places
Widest pull range options: ±25, ±50, ±80, ±100, ±150, ±200,
±400, ±800, ±1600, ±3200 ppm
0.235 ps RMS phase jitter (typ) over 12 kHz to 20 MHz
bandwidth
Wide temperature range support from -40°C to 105°C
Industry-standard packages: 7.0 x 5.0 mm, 5.0 x 3.2 mm,
3.2 x 2.5 mm packages
For frequencies 1 MHz to 220 MHz, refer to
SiT3372
Applications
Cable Modem Termination System (CMTS), Video,
Broadcasting System, Audio, Industrial Sensors,
Remote Radio Head (RRH)
SATA, SAS, 10GB Ethernet, Fibre Channel, PCI-Express
Optical Transport Network (OTN)
Electrical Characteristics
Table 1. Electrical Characteristics – Common to LVPECL, LVDS and HCSL
All Min and Max limits in the Electrical Characteristics tables are specified over temperature and rated operating voltage with standard
output termination show in the termination diagrams. Typical values are at 25°C and nominal supply voltage.
Parameter
Output Frequency Range
Frequency Stability
Symbol
f
F_stab
Min.
220.000001
-15
Typ.
–
–
Max.
725
+15
Unit
MHz
ppm
Condition
Accurate to 6 decimal places
Inclusive of initial tolerance, operating temperature, rated power
supply voltage, load variations, and first year aging at 25°C.
Contact
SiTime
for ±15 ppm.
Inclusive of initial tolerance, operating temperature, rated
power supply voltage, load variations, and first year aging
at 25°C.
Frequency Range
Frequency Stability
-25
-35
-50
Operating Temperature Range
T_use
-20
-40
-40
-40
Supply Voltage
Vdd
2.97
2.70
2.52
2.25
Pull Range
Upper Control Voltage
Lower Control Voltage
Control Voltage Input Impedance
Control Voltage Input Bandwidth
Pull Range Linearity
Frequency Change Polarity
Input Voltage High
Input Voltage Low
Input Pull-up Impedance
Duty Cycle
Start-up Time
OE Enable/Disable Time
PR
VC_U
VC_L
VC_z
V_c
Lin
–
VIH
VIL
Z_in
DC
T_start
T_oe
70%
–
–
45
–
–
–
–
–
–
–
–
–
3.30
3.00
2.80
2.50
+25
+35
+50
+70
+85
+95
+105
Supply Voltage
3.63
3.30
3.08
2.75
ppm
ppm
ppm
°C
°C
°C
°C
V
V
V
V
ppm
Vdd
Vdd
MΩ
kHz
%
–
Temperature Range
Extended Commercial
Industrial.
Extended Industrial
Voltage Control Characteristics
±25, ±50, ±80, ±100, ±150, ±200,
±400, ±800, ±1600, ±3200ppm
90%
–
–
–
–
–
–
10
10
–
Positive Slope
–
–
100
–
–
–
–
30%
-
55
3.0
3.8
–
10%
–
–
1.0
See the APR (Absolute Pull Range)
Table 11.
Contact
SiTime
for custom pull range options.
Voltage at which maximum frequency deviation is guaranteed
Voltage at which minimum frequency deviation is guaranteed
Contact
SiTime
for other input bandwidth options
Input Characteristics
Vdd
Vdd
kΩ
%
ms
µs
Measured from the time Vdd reaches its rated minimum value.
f = 322.265625 MHz. Measured from the time OE pin reaches
rated VIH and VIL to the time clock pins reach 90% of swing
and high-Z. See
Figure 7
and
Figure 8
Pin 2, OE
Pin 2, OE
Pin 2, OE logic high or logic low
Output Characteristics
Startup and OE Timing
Rev 1.03
May 10, 2018
www.sitime.com
SiT3373
220 MHz to 725 MHz Ultra-low Jitter Differential VCXO
Table 2. Electrical Characteristics – LVPECL Specific
Parameter
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Maximum Output Current
Output High Voltage
Output Low Voltage
Output Differential Voltage Swing
Rise/Fall Time
Symbol
Idd
I_OE
I_leak
I_driver
VOH
VOL
V_Swing
Tr, Tf
Min.
–
–
–
–
Vdd-1.15
Vdd-1.9
1.2
–
Typ.
–
–
0.15
–
–
–
1.6
225
Max.
97
63
–
32
Vdd-0.7
Vdd-1.5
2.0
290
Unit
mA
mA
µA
mA
V
V
V
ps
Condition
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE = Low
OE = Low
Maximum average current drawn from OUT+ or OUT-
See
Figure 3
See
Figure 3
See
Figure 4
20% to 80%, see
Figure 4
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -40 to 95 ºC and -40 to 105ºC
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter
mask integration bandwidth = 1.875 MHz to 20 MHz, all Vdd
levels.
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -40 to 95 ºC and -40 to 105ºC
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter
mask integration bandwidth = 1.875 MHz to 20 MHz, all
Vdd levels.
Current Consumption
Output Characteristics
Jitter – 7.0 x 5.0 mm Package
RMS Period Jitter
[1]
T_jitt
–
1.0
0.220
1.6
0.270
ps
ps
RMS Phase Jitter (random)
T_phj
–
0.220
0.300
ps
–
0.1
–
ps
Jitter – 5.0 x 3.2 mm and 3.2 x 2.5 mm Packages
RMS Period Jitter
[1]
T_jitt
–
1.0
0.225
1.6
0.282
ps
ps
RMS Phase Jitter (random)
T_phj
–
0.225
0.315
ps
–
Notes:
1. Measured according to JESD65B
0.1
–
ps
Rev 1.03
Page 2 of 16
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SiT3373
220 MHz to 725 MHz Ultra-low Jitter Differential VCXO
Table 3. Electrical Characteristics – LVDS Specific
Parameter
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Differential Output Voltage
VOD Magnitude Change
Offset Voltage
VOS Magnitude Change
Rise/Fall Time
Symbol
Idd
I_OE
I_leak
VOD
∆VOD
VOS
∆VOS
Tr, Tf
Min.
–
–
–
250
–
1.125
–
–
Typ.
–
–
0.15
–
–
–
–
370
Max.
89
67
–
450
50
1.375
50
470
Unit
mA
mA
µA
mV
mV
V
mV
ps
Condition
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE = Low
OE = Low
See
Figure 5
See
Figure 5
See
Figure 5
See
Figure 5
Measured with 2 pF capacitive loading to GND, 20% to 80%,
see
Figure 6
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -40 to 95 ºC and -40 to 105ºC
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter
mask integration bandwidth = 1.875 MHz to 20 MHz, includes
spurs, all Vdd levels.
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -40 to 95 ºC and -40 to 105ºC
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter
mask integration bandwidth = 1.875 MHz to 20 MHz, includes
spurs, all Vdd levels.
Current Consumption
Output Characteristics
Jitter – 7.0 x 5.0 mm package
RMS Period Jitter
[2]
T_jitt
T_phj
–
–
0.92
0.215
1.6
0.265
ps
ps
RMS Phase Jitter (random)
–
0.215
0.280
ps
–
0.1
–
ps
Jitter – 5.0 x 3.2 mm and 3.2 x 2.5 mm packages
RMS Period Jitter
[2]
T_jitt
T_phj
–
–
0.92
0.235
1.6
0.282
ps
ps
RMS Phase Jitter (random)
–
0.235
0.310
ps
–
0.1
–
ps
Notes:
2. Measured according to JESD65B
Rev 1.03
Page 3 of 16
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SiT3373
220 MHz to 725 MHz Ultra-low Jitter Differential VCXO
Table 4. Electrical Characteristics – HCSL – Specific
Parameter
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Maximum Output Current
Output High Voltage
Output Low Voltage
Output Differential Voltage Swing
Rise/Fall Time
Symbol
Idd
I_OE
I_leak
I_driver
VOH
VOL
V_Swing
Tr, Tf
Min.
–
–
–
–
0.6
-0.05
1.2
–
Typ.
–
–
0.15
–
–
–
1.4
360
Max.
102
67
–
36
0.90
0.08
1.8
470
Unit
mA
mA
µA
mA
V
V
V
ps
Condition
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE = Low
OE = Low
Maximum average current drawn from OUT+ or OUT-
See
Figure 3
See
Figure 3
See
Figure 4
Measured with 2 pF capacitive loading to GND, 20% to 80%,
see
Figure 4
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter
mask integration bandwidth = 1.875 MHz to 20 MHz, includes
spurs, all Vdd levels.
f = 100, 156.25 or 212.5 MHz, Vdd = 3.3V or 2.5V,
Pull Range = 100 ppm.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -20 to 70ºC and -40 to 85ºC.
f = 322.265625 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels, includes spurs, pull range = 100 ppm.
Temperature ranges -40 to 95 ºC and -40 to 105ºC
f = 156.25 or 322.265625 MHz, IEEE802.3-2005 10GbE jitter mask
integration bandwidth = 1.875 MHz to 20 MHz, includes spurs, all
Vdd levels.
Current Consumption
Output Characteristics
Jitter – 7.0 x 5.0 mm package
RMS Period Jitter
[3]
T_jitt
T_phj
–
–
–
1.0
0.215
0.215
1.6
0.265
0.282
ps
ps
ps
RMS Phase Jitter (random)
–
0.1
–
ps
Jitter – 5.0 x 3.2 mm and 3.2 x 2.5 mm packages
RMS Period Jitter
[3]
T_jitt
T_phj
–
1.0
0.235
1.6
0.282
ps
0.215
RMS Phase Jitter (random)
0.235
0.305
0.215
0.1
–
0.1
Notes:
3. Measure according to JESD65B.
Rev 1.03
Page 4 of 16
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SiT3373
220 MHz to 725 MHz Ultra-low Jitter Differential VCXO
Table 5. Pin Description
Pin
1
Symbol
VIN
Input
No Connect
(NC)
2
NC/OE
Output Enable
(OE)
Power
Output
Output
Power
Control Voltage
No Connect: Leave floating or connect to GND for better heat dissipation. NC for all 3.2 x 2.5 mm
package options.
H
: specified frequency output
L: output is high impedance. Only output driver is disabled. OE function only available on 7050
package. Pin 2 on 3225 package is NC.
Vdd Power Supply Ground
Oscillator output
Complementary oscillator output
Power supply voltage
[6]
[4,5]
Functionality
3
4
5
6
GND
OUT+
OUT-
Vdd
Top View
Top View
Figure 1. Pin Assignments
(7.0 x 5.0 mm and
5.0 x 3.2 mm packages)
Figure 2. Pin Assignments
(3.2 x 2.5 mm package)
Notes:
4. A pull-up resistor of 10 kΩ or less is recommended if pin 1 is not externally driven.
5. OE mode is only available in the 7050 and 5032 packages. 3225 package is NC.
6. A capacitor of value 0.1 µF or higher between Vdd and GND is required. An additional 10 µF capacitor between Vdd and GND is required for the best
phase jitter performance.
Rev 1.03
Page 5 of 16
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