SiT2025B
High Frequency, Automotive AEC-Q100 SOT23 Oscillator
Features
Applications
AEC-Q100 with extended temperature range (-55°C to 125°C)
Frequencies between 115.2 MHz and 137 MHz accurate to 6
decimal points
100% pin-to-pin drop-in replacement to quartz-based XO
Excellent total frequency stability as low as ±20 ppm
Industry best G-sensitivity of 0.1 PPB/G
LVCMOS/LVTTL compatible output
5-pin SOT23-5 package: 2.9 x 2.8 mm x mm
RoHS and REACH compliant, Pb-free, Halogen-free and
Antimony-free
Automotive, extreme temperature and other high-rel
electronics
Infotainment systems, collision detection devices, and
in-vehicle networking
Powertrain control
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 25°C and nominal supply voltage.
Table 1. Electrical Characteristics
Parameters
Output Frequency Range
Frequency Stability
Symbol
f
F_stab
Min.
115.20
-20
-25
-30
-50
Operating Temperature
Range (ambient)v
T_use
-40
-40
-40
-55
Supply Voltage
Current Consumption
Vdd
Idd
1.62
2.25
–
–
45
–
–
Output High Voltage
VOH
90%
Typ.
–
–
–
–
–
–
–
–
–
1.8
–
6
4.9
–
1.5
1.5
–
Max.
137
Unit
MHz
Condition
Refer to
Table 14 and Table 15
for the exact list of supported frequencies
Frequency Range
Frequency Stability and Aging
Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and varia-
+20
ppm
tions over operating temperature, rated power supply voltage and load
+25
ppm
(15 pF ± 10%).
+30
ppm
ppm
+50
Operating Temperature Range
+85
+105
+125
+125
1.98
3.63
°C
°C
°C
°C
V
V
Industrial, AEC-Q100 Grade 3
Extended Industrial, AEC-Q100 Grade 2
Automotive, AEC-Q100 Grade 1
Extended Temperature, AEC-Q100
All voltages between 2.25V and 3.63V including 2.5V, 2.8V, 3.0V and 3.3V
are supported. Contact
SiTime
for 1.5V support
Supply Voltage and Current Consumption
No load condition, f = 125 MHz, Vdd = 2.25V to 3.63V
8
mA
6
mA
No load condition, f = 125 MHz, Vdd = 1.62V to 1.98V
LVCMOS Output Characteristics
55
3
2.5
–
%
ns
ns
Vdd
Vdd = 2.25V - 3.63V, 20% - 80%
Vdd = 1.8V, 20% - 80%
IOH = -4 mA (Vdd = 3.0V or 3.3V)
IOH = -3 mA (Vdd = 2.8V and Vdd = 2.5V) IOH = -2
mA (Vdd = 1.8V)
IOL = 4 mA (Vdd = 3.0V or 3.3V)
IOL = 3 mA (Vdd = 2.8V and Vdd = 2.5V) IOL = 2
mA (Vdd = 1.8V)
Pin 1, OE
Pin 1, OE
Pin 1, OE logic high or logic low
Measured from the time Vdd reaches its rated minimum value
f = 115.20 MHz. For other frequencies, T_oe = 100 ns + 3 * cycles
f = 125 MHz, 2.25V to 3.63V
f = 125 MHz, 1.8V
f = 125 MHz, Integration bandwidth = 900 kHz to 7.5 MHz
f = 125 MHz, Integration bandwidth = 12 kHz to 20 MHz
Duty Cycle
Rise/Fall Time
DC
Tr, Tf
Output Low Voltage
VOL
–
–
10%
Vdd
Input Characteristics
Input High Voltage
Input Low Voltage
Input Pull-up Impedence
Startup Time
Enable/Disable Time
RMS Period Jitter
RMS Phase Jitter (random)
VIH
VIL
Z_in
T_start
T_oe
T_jitt
T_phj
70%
–
–
–
–
–
–
–
–
–
–
100
–
–
1.6
1.8
0.7
1.5
–
30%
–
5
130
2.5
3
–
–
Vdd
Vdd
kΩ
ms
ns
Jitter
ps
ps
ps
ps
Startup and Resume Timing
Rev 1.5
December 14, 2016
www.sitime.com
SiT2025B
High Frequency, Automotive AEC-Q100 SOT23 Oscillator
Table 2. Pin Description
Pin
1
2
Symbol
GND
NC
Power
No Connect
Output Enable
3
OE/NC
No Connect
4
5
VDD
OUT
Power
Output
Electrical ground
[1]
No connect
H
[2]
: specified frequency output
L: output is high impedance. Only output driver is disabled.
Any voltage between 0 and Vdd or Open
[2]
: Specified frequency
output. Pin 3 has no function.
Power supply voltage
[1]
Oscillator output
GND
1
5
Functionality
Top View
OUT
YXXXX
NC
2
OE/NC
3
4
VDD
Notes:
1. A capacitor of value 0.1 µF or higher between Vdd and GND is required.
2. In OE or ST mode, a pull-up resistor of 10 kΩ or less is recommended if pin 3 is not externally driven.
If pin 3 needs to be left floating, use the NC option.
Figure 1. Pin Assignments
Table 3. Absolute Maximum Limits
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
Storage Temperature
Vdd
Electrostatic Discharge
Soldering Temperature (follow standard Pb free
soldering guidelines)
Junction Temperature
[3]
Min.
-65
-0.5
–
–
–
Max.
150
4
2000
260
150
Unit
°C
V
V
°C
°C
Note:
3. Exceeding this temperature for extended period of time may damage the device.
Table 4. Thermal Consideration
[4]
Package
SOT23-5
θ
JA, 4 Layer Board
(°C/W)
421
θ
JC, Bottom
(°C/W)
175
Note:
4. Refer to JESD51 for
θJA
and
θJC
definitions, and reference layout used to determine the
θJA
and
θJC
values in the above table.
Table 5. Maximum Operating Junction Temperature
[5]
Max Operating Temperature (ambient)
85°C
105°C
125°C
Maximum Operating Junction Temperature
95°C
115°C
135°C
Note:
5. Datasheet specifications are not guaranteed if junction temperature exceeds the maximum operating junction temperature.
Table 6. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Moisture Sensitivity Level
Condition/Test Method
MIL-STD-883F, Method 2002
MIL-STD-883F, Method 2007
JESD22, Method A104
MIL-STD-883F, Method 2003
MSL1 @ 260°C
Rev. 1.5
Page 2 of 15
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SiT2025B
High Frequency, Automotive AEC-Q100 SOT23 Oscillator
Test Circuit and Waveform
[6]
Test
Point
Vout
Vdd
tr
5
4
0.1µF
Power
Supply
tf
80% Vdd
50%
20% Vdd
High Pulse
(TH)
Period
Low Pulse
(TL)
15 pF
(including probe
and fixture
capacitance)
1
2
3
Vdd
1k
OE/ST Function
Figure 2. Test Circuit
Note:
6. SiT2025 has “no runt” pulses and “no glitch” output during startup or resume.
Figure 3. Waveform
Timing Diagrams
Vdd
90% Vdd
Vdd
50% Vdd
No Glitch
during start up
[7]
T_oe
OE Voltage
Pin 4 Voltage
T_start
CLK Output
HZ
CLK Output
HZ
T_start: Time to start from power-off
T_oe: Time to re-enable the clock output
Figure 4. Startup Timing (OE Mode)
Figure 5. OE Enable Timing (OE Mode Only)
Vdd
OE Voltage
50% Vdd
T_oe
CLK Output
HZ
T_oe: Time to put the output in High Z mode
Figure 6. OE Disable Timing (OE Mode Only)
Note:
7. SiT2025 has “no runt” pulses and “no glitch” output during startup or resume.
Rev. 1.5
Page 3 of 15
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SiT2025B
High Frequency, Automotive AEC-Q100 SOT23 Oscillator
Performance Plots
[8]
1.8
6.5
6.3
6.1
2.5
2.8
3.0
3.3
DUT1
DUT8
DUT15
25
20
DUT2
DUT9
DUT16
DUT3
DUT10
DUT17
DUT4
DUT11
DUT18
DUT5
DUT12
DUT19
DUT6
DUT13
DUT20
DUT7
DUT14
5.7
5.5
5.3
5.1
4.9
4.7
4.5
115
117
119
121
123
125
127
129
131
133
135
137
Frequency (ppm)
5.9
15
10
5
0
-5
-10
-15
-20
-25
-55
-35
-15
5
25
45
65
85
105
125
Idd (mA)
Frequency (MHz)
Temperature (°C)
Figure 7. Idd vs Frequency
Figure 8. Frequency vs Temperature
1.8 V
4.0
3.5
2.5 V
2.8 V
3.0 V
3.3 V
55
54
53
1.8 V
2.5 V
2.8 V
3.0 V
3.3 V
RMS period jitter (ps)
Duty cycle (%)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
115
117
119
121
123
125
127
129
131
133
135
137
52
51
50
49
48
47
46
45
115
117
119
121
123
125
127
129
131
133
135
137
Frequency (MHz)
Frequency (MHz)
Figure 9. RMS Period Jitter vs Frequency
Figure 10. Duty Cycle vs Frequency
1.8 V
2.5
2.5 V
2.8 V
3.0 V
3.3 V
1.8 V
2.5
2.5 V
2.8 V
3.0 V
3.3 V
2.0
2.0
Rise time (ns)
1.5
Fall time (ns)
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100 110 120
1.5
1.0
1.0
0.5
0.5
0.0
0.0
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100 110 120
Temperature (°C)
Temperature (°C)
Figure 11. 20%-80% Rise Time vs Temperature
Figure 12. 20%-80% Fall Time vs Temperature
Rev. 1.5
Page 4 of 15
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SiT2025B
High Frequency, Automotive AEC-Q100 SOT23 Oscillator
Performance Plots
[8]
1.8 V
2.0
2.5 V
2.8 V
3.0 V
3.3 V
1.8 V
1.0
2.5 V
2.8 V
3.0 V
3.3 V
1.8
0.9
0.8
IPJ (ps)
1.6
IPJ (ps)
115
117
119
121
123
125
127
129
131
133
135
137
0.7
1.4
0.6
1.2
0.5
1.0
0.4
115
117
119
121
123
125
127
129
131
133
135
137
Frequency (MHz)
Frequency (MHz)
Figure 13. RMS Integrated Phase Jitter Random
[9]
(12 kHz to 20 MHz) vs Frequency
Notes:
8. All plots are measured with 15 pF load at room temperature, unless otherwise stated.
9. Phase noise plots are measured with Agilent E5052B signal source analyzer.
Figure 14. RMS Integrated Phase Jitter Random
[9]
(900 kHz to 20 MHz) vs Frequency
Rev. 1.5
Page 5 of 15
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