115.2 – 137 MHz, -55 to 125°C, SOT23, Endura™ Series Oscillator
Features
Applications
Best acceleration sensitivity of 0.1 ppb/g
Any 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
AEC-Q100 qualified
5-pin SOT23-5 package: 2.9 x 2.8 mm x mm
RoHS and REACH compliant, Pb-free, Halogen-free and
Antimony-free
Contact SiTime
for up-screening and LAT programs
Avionics systems
Field communication systems
Telemetry applications
Electrical Characteristics
Table 1. 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.
Parameters
Output Frequency Range
Frequency Stability
Symbol
f
F_stab
Min.
115.20
-20
-25
-30
-50
Operating Temperature
Range (ambient)
T_use
-40
-40
-40
-55
Acceleration (g) sensitivity,
Gamma Vector
Supply Voltage
Current Consumption
F_g
–
Typ.
–
–
–
–
–
–
–
–
–
–
Max.
137
+20
+25
+30
+50
+85
+105
+125
+125
0.1
Unit
MHz
ppm
ppm
ppm
ppm
°C
°C
°C
°C
ppb/g
AEC-Q100 Grade 3
AEC-Q100 Grade 2
AEC-Q100 Grade 1
Extended cold, AEC-Q100 Grade1
Low sensitivity grade; total gamma over 3 axes; 15 Hz to 2 kHz;
MIL-PRF-55310, computed per section 4.8.18.3.1
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
No load condition, f = 125 MHz, Vdd = 2.25V to 3.63V
No load condition, f = 125 MHz, Vdd = 1.62V to 1.98V
Condition
Refer to Tables 14 to 16 for the exact
list of supported frequencies
Inclusive of Initial tolerance at 25°C, 1st year aging at 25°C, and
variations over operating temperature, rated power supply voltage
and load (15 pF ± 10%).
Frequency Range
Frequency Stability and Aging
Operating Temperature Range
Rugged Characteristics
Supply Voltage and Current Consumption
Vdd
Idd
1.62
2.25
–
–
Duty Cycle
Rise/Fall Time
Output High Voltage
DC
Tr, Tf
VOH
45
–
–
90%
1.8
–
6
4.9
–
1.5
1.5
–
1.98
3.63
8
6
55
3
2.5
–
V
V
mA
mA
%
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
LVCMOS Output Characteristics
Output Low Voltage
VOL
–
–
10%
Vdd
Input Characteristics
Input High Voltage
Input Low Voltage
Input Pull-up Impedance
VIH
VIL
Z_in
70%
–
–
–
–
100
–
30%
–
Vdd
Vdd
k
Rev. 0.5
July 22, 2019
www.sitime.com
SiT2045B
115.2 – 137 MHz, -55 to 125°C, SOT23, Endura™ Series Oscillator
Table 1. Electrical Characteristics
(continued)
Parameters
Startup Time
Enable/Disable Time
Standby Current
Symbol
T_start
T_oe
I_std
Min.
–
–
–
–
Typ.
–
–
2.6
1.4
Max.
5.5
130
–
–
Unit
ms
ns
A
A
Jitter
RMS Period Jitter
RMS Phase Jitter (random)
T_jitt
T_phj
–
–
–
–
1.6
1.8
0.7
1.5
2.5
3
–
–
ps
ps
ps
ps
f = 125 MHz, 2.25V to 3.63V
f = 125 MHz, 1.8V
PRELIMINARY
Condition
Measured from the time Vdd reaches its rated minimum value
f = 115.20 MHz. For other frequencies, T_oe = 100 ns + 3 * cycles
Vdd = 2.8V to 3.3V,
ST
= Low, Output is weakly pulled down
Vdd = 2.5V,
ST
= Low, Output is weakly pulled down
Startup and Resume Timing
f = 125 MHz, Integration bandwidth = 900 kHz to 7.5 MHz
f = 125 MHz, Integration bandwidth = 12 kHz to 20 MHz
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
Functionality
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
NC
2
Top View
GND
1
5
OUT
YXXXX
OE/NC
3
4
VDD
Figure 1. Pin Assignments
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.
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
Note:
4. Refer to JESD51 for
JA
and
JC
definitions, and reference layout used to determine the
JA
and
JC
values in the above table.
JA, 4 Layer Board
(°C/W)
421
JC, Bottom
(°C/W)
175
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.
Rev. 0.5
Page 2 of 12
www.sitime.com
SiT2045B
115.2 – 137 MHz, -55 to 125°C, SOT23, Endura™ Series Oscillator
Table 6. Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Moisture Sensitivity Level
PRELIMINARY
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. 0.5
Page 3 of 12
www.sitime.com
SiT2045B
115.2 – 137 MHz, -55 to 125°C, SOT23, Endura™ Series Oscillator
Test Circuit and Waveform
Test
Point
Vout
Vdd
PRELIMINARY
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
[6]
Note:
6. SiT2045 has “no runt” pulses and “no glitch” output during startup or resume.
Figure 3. Waveform
[6]
Timing Diagrams
Vdd
90% Vdd
Vdd
50% Vdd
T_oe
No Glitch
during start up
Pin 4 Voltage
T_start
OE Voltage
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)
[7]
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. SiT2045 has “no runt” pulses and “no glitch” output during startup or resume.
Rev. 0.5
Page 4 of 12
www.sitime.com
SiT2045B
115.2 – 137 MHz, -55 to 125°C, SOT23, Endura™ Series Oscillator
[color=#000][font=宋体][size=12px]By John Rice, Systems Engineer, and Steve Sandler, Executive Director, Picotest, Texas Instruments[/size][/font][/color] [color=#000][font=宋体][size=12px]In theory, the ...
I have collected some groups for everyone to play with. I usually go back to chat in groups at night. Huajiang Group 39063007 - mainly for wince, including microcontrollers. Zhuhai Electronic Engineer...
I've been using URM37 for distance measurement recently. But I encountered a problem in the early stage, that is, writing the distance measurement command into the URM37 module, and then it automatica...
[color=#000][color=rgb(62, 62, 62)][align=left][b]Most engineers can wait for the return of the board after sending the PCB file or gerber file to the manufacturer. However, often after working in the...
I bought a mountain bike in October and started to go out with everyone. I had the idea to make a temperature, humidity and altimeter in one. I thought I would miss it. Unexpectedly, I found the digit...
1. Equipment Overview
Shell-and-tube heat exchangers are a common heat exchange device used in chemical evaporation and heating equipment. Currently, the tubesheets of shell-and-tube heat exch...[Details]
Abstract:
With the increasing complexity of smart vehicle electrical and electronic architectures, the full lifecycle management of vehicle electronic control components faces multiple challe...[Details]
To enable real-time monitoring of home security and automatically dial a number for voice prompts or send text messages when an alarm occurs, a GPRS-based embedded telephone alarm system was design...[Details]
Recently, AstroBo Robot, a subsidiary of Chenxing Automation, launched a new mobile collaborative palletizing product. Leveraging an omnidirectional mobile chassis, an intelligent scheduling system...[Details]
Since its invention in the mid-1940s, the microwave oven has evolved from a humble beginning to commercial use, entering homes in the 1960s and rapidly gaining popularity. Its basic functionality a...[Details]
Electric vehicles are now widespread, but they've brought with them a host of problems, the most prominent of which is charging. Small electric vehicles (EVs) are a new form of transportation in a ...[Details]
Electric vehicles are becoming increasingly popular, with increasingly longer ranges. There are two ways to charge electric vehicles: slow charging and fast charging. Which is the most suitable? Sl...[Details]
In the field of intelligent driving, regulations are becoming increasingly stringent, and the technical threshold continues to rise. Especially after the traffic accident in March 2025, the Ministr...[Details]
In daily life, when we purchase a transformer, we are faced with the installation and wiring procedures. Generally speaking, large transformers such as power transformers are equipped with speciali...[Details]
With growing environmental awareness, the continuous improvement of three-electric technology and the increasing deployment of infrastructure such as charging stations, the electrification of new e...[Details]
With the gradual popularization of new energy vehicles in recent years, more and more people have been able to access and purchase electric vehicles. The structure of electric vehicles is composed ...[Details]
Consumer demand for premium listening experiences has driven rapid evolution in the wireless headphone market in recent years. Hybrid designs, which utilize two drivers per earbud to enhance sound ...[Details]
introduction
Inverter air conditioners are a trend in the current era and have gradually become commonplace in countless households. Beyond their basic cooling and heating functions, air condi...[Details]
The evolution of high-speed networks remains guided by the same core objectives: increasing data rates, reducing latency, improving reliability, lowering power consumption, and maintaining or exten...[Details]
introduction
With the development and widespread use of integrated circuits in power electronics design, electronic products are trending towards smaller sizes, more components, and greater fu...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
