f = 80.000001 MHz, all Vdds. For other freq, T_oe = 100 ns + 3
clock periods
See Figure 8 for resume timing diagram
f = 156.25 MHz, Vdd = 2.5V, 2.8V or 3.3V
f = 156.25 MHz, Vdd = 1.8V
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz
LVCMOS Output Characteristics
Output Low Voltage
VOL
–
–
10%
Vdd
Input Characteristics
Input Pull-up Impedance
Input Capacitance
Startup Time
OE Enable/Disable Time
Resume Time
RMS Period Jitter
RMS Phase Jitter (random)
Z_in
C_in
T_start
T_oe
T_resume
T_jitt
T_phj
–
–
–
–
–
–
–
–
100
5
–
–
7
1.5
2
0.5
250
–
10
115
10
Jitter
2
3
1
ps
ps
ps
kΩ
pF
ms
ns
ms
Startup and Resume Timing
Notes:
1. All electrical specifications in the above table are specified with 15 pF output load and for all Vdd(s) unless otherwise stated.
2. The typical value of any parameter in the Electrical Characteristics table is specified for the nominal value of the highest voltage option for that parameter and at
25°C temperature.
3. All max and min specifications are guaranteed across rated voltage variations and operating temperature ranges, unless specified otherwise
4. Initial tolerance is measured at Vin = Vdd/2
5. Absolute Pull Range (APR) is defined as the guaranteed pull range over temperature and voltage.
6. APR = pull range (PR) - frequency stability (F_stab) - Aging (F_aging)
Rev. 1.01
Page 2 of 9
www.sitime.com
SiT3809
80 MHz to 220 MHz MEMS VCXO
The Smart Timing Choice
The Smart Timing Choice
Table 2. Pin Description. 4-Pin Configuration
(For 2.5 x 2.0 mm and 3.2 x 2.5 mm packages)
Pin
1
2
3
4
Symbol
VIN
GND
CLK
VDD
Input
Power
Power
Input
Power
Electrical ground
Power supply voltage
Oscillator output power
[7]
GND
2
3
Top View
Functionality
VIN
1
4
0-Vdd: produces voltage dependent frequency change
VDD
CLK
Note:
7. A capacitor value of 0.1 µF between VDD and GND is recommended.
Figure 1.
Table 3. Pin Description. 6-Pin Configuration
(For 5.0 x 3.2 mm and 7.0 x 5.0 mm packages)
Pin
1
Symbol
VIN
Input
No
Connect
2
NC/OE/ ST
Output
Enable
Standby
3
4
5
6
GND
CLK
NC
VDD
Power
Output
No
Connect
Power
Functionality
0-Vdd: produces voltage dependent frequency change
H or L or Open: No effect on output frequency or other device
functions
H or Open
[8]
: specified frequency output
L: output is high
H or Open
[8]
: specified frequency output
L: output is low (weak pull down)
[9]
. Oscillation stops
Electrical ground
Oscillator output
H or L or Open: No effect on output frequency or other device
functions
Power supply voltage
[10]
VIN
NC/OE/ST
GND
1
6
Top View
VDD
NC
CLK
2
5
3
4
Figure 2.
Notes:
8. In OE or ST mode, a pull-up resistor of 10 kΩ or less is recommended if pin 2 in the 6-pin package is not externally driven. If pin 2 needs to be left floating, use
the NC option
9. Typical value of the weak pull-down impedance is 5 mΩ
10. A capacitor value of 0.1 µF between VDD and GND is recommended.
Table 4. 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)
Min.
-65
-0.5
–
–
Max.
150
4
2000
260
Unit
°C
V
V
°C
Table 5. Thermal Consideration
Parameter
7050
5032
3225
2520
JA, 4 Layer Board
(°C/W)
191
97
109
117
JA, 2 Layer Board
(°C/W)
263
199
212
222
JC, Bottom
(°C/W)
30
24
27
26
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. 1.01
Page 3 of 9
www.sitime.com
SiT3809
80 MHz to 220 MHz MEMS VCXO
The Smart Timing Choice
The Smart Timing Choice
Phase Noise Plot
SiT3809, 100MHz, Pull range ±100ppm, 3.3V, LVCMOS output
-80
-90
Phase Noise (dBc/Hz)
-100
-110
-120
-130
-140
-150
-160
3
10
Integrated Random Phase Jitter (RMS, 12kHz - 20MHz): 0.51 ps
10
4
10
5
10
6
10
7
Offset Frequency (Hz)
Figure 3. Phase Noise
Test Circuit and Waveform
Vdd
Vout
Test
Point
6
15pF
(including probe
and fixture
capacitance)
Power
Supply
0.1µF
5
Vout
Test
Point
4
Power
Supply
0.1µF
3
4
15pF
(including probe
and fixture
capacitance)
1
2
1
2
3
OE/ST Function
Vc
OE/ST Function
Vc
Vdd
Figure 4. Test Circuit (4-Pin Device)
Figure 5. Test Circuit (6-Pin Device)
tr
90% Vdd
50%
10% Vdd
High Pulse
(TH)
Period
tf
Low Pulse
(TL)
Figure 6. Waveform
Notes:
11. Duty Cycle is computed as Duty Cycle = TH/Period.
12. SiT3809 supports the configurable duty cycle feature. For custom duty cycle at any given frequency, contact
SiTime.
Rev. 1.01
Page 4 of 9
www.sitime.com
SiT3809
80 MHz to 220 MHz MEMS VCXO
The Smart Timing Choice
The Smart Timing Choice
Timing Diagram
Vdd
50% Vdd
Pin 4 Voltage
T_start
No Glitch
during start up
80% Vdd, 2.5/2.8/3.3V devices
80% Vdd, 1.8V devices
Vdd
ST Voltage
T_resume
CLK Output
CLK Output
T_start: Time to start from power-off
T_resume: Time to resume from ST
Figure 7. Startup Timing (OE/ST Mode)
u
Vdd
50% Vdd
OE Voltage
T_oe
Figure 8. Standby Resume Timing (ST Mode Only)
Vdd
OE Voltage
50% Vdd
T_oe
CLK Output
CLK Output
HZ
T_oe: Time to re-enable the clock output
T_oe: Time to put the output in High Z mode
Figure 9. OE Enable Timing (OE Mode Only)
Figure 10. OE Disable Timing (OE Mode Only)
Notes:
13. SiT3809 supports “no runt” pulses and “no glitch” output during startup or resume.
14. SiT3809 supports gated output which is accurate within rated frequency stability from the first cycle.
I am a newbie who just came into contact with DSP. I would like to ask for advice from experts: how to use 5410 hardware to generate a 1 second delay. I would like to know the detailed register config...
It is a common phenomenon that the crystal oscillator of a single-chip microcomputer fails to oscillate. So what are the reasons for the crystal oscillator failing to oscillate? Let me give you a brie...
I have just started to learn CE, and when I was using pb to customize the operating system, I encountered a problem that I couldn't solve. I hope someone can answer me. The system version I am using i...
[i=s] This post was last edited by paulhyde on 2014-9-15 03:15 [/i] [size=4][color=blue][b] This video is a teaching video of Hongxiang Electronics FPGA Experiment Board [/b][/color][/size]The experim...
Simulate various harsh environments and reliability assessments for tablet computers to test whether their performance meets the requirements; reliability tests mainly include high and low temperature...
With the continuous improvement of living standards and the increase in the proportion of urban aging, the household use of medical electronic equipment has gradually become a trend. Among them, the...[Details]
At present, a hot spot for the research and development of hearing aids abroad is concentrated in China. To be more precise, it is based on the research of Chinese language and speech, and the deve...[Details]
Multi-parameter monitor is an important device in clinical nursing. It can monitor the patient's ECG, blood pressure, blood oxygen saturation, respiratory rate, pulse rate and temperature. At present,...[Details]
introduction
The data detected by various
measuring instruments
often need to be transferred to a PC for data processing and archiving, so as to make full use of the rich hardware an...[Details]
Application of TWLA500 in ADC and related fields
FAE: On-site technical support. Provide technical support to customers on the application of the products you sell, and handle quality ...[Details]
Abstract:
Online dynamic signature authentication is increasingly used in various fields, especially in banking and financial systems and personal identification. As the basis of online signa...[Details]
The PIC series 8-bit single-chip microcomputer (RISC microcontroller) developed by Microchip Technology Inc. in the United States, especially the microcontroller with built-in second-generation Flash ...[Details]
1. Intrusion Detection System (IDS)
IDS is the abbreviation of "Intrusion Detection Systems" in English, which means "Intrusion Detection System" in Chinese. Professionally speaking, it monito...[Details]
China National Stadium Project Introduction
The National Stadium (Bird's Nest), the main venue for the opening and closing ceremonies of the 2008 Beijing Olympic Games, is located on the g...[Details]
With more and more countries, regions and cities legislating to require drivers to use hands-free calling systems, as well as the shrinking wallets of most consumers around the world and the uncert...[Details]
1 Introduction
JPEG2000 is a new generation of international standard for still image compression, which has superior image compression performance and high image quality. It not only over...[Details]
1 Introduction
Fuzzy neural network is the product of the combination of fuzzy logic control and neural network. There are certain defects when these two are used alone. Fuzzy logic has go...[Details]
0 Introduction
High-frequency switching power supplies have been widely used in the communication and low-voltage industries, and have gradually been used in power systems, due to their ad...[Details]
1
Introduction
With the rapid development of computer technology, network technology and large-scale integrated circuits, dynamic signal analysis systems have shown a trend towards n...[Details]
Introduction
As mobile devices become more multifunctional, the operating voltage of their power circuits has also become diversified. Specifically, taking a typical mobile phone as a...[Details]
DSP and ARM Processors
京公网安备 11010802033920号
EEWORLD
