Ordering Information .................................................................................................................................................................... 2
7.1. User Programming Interface ..................................................................................................................................... 19
7.2. Start-up output frequency and signaling types .......................................................................................................... 19
8.1. Any-frequency function ............................................................................................................................................. 20
C/SPI Control Registers...................................................................................................................................................... 30
9.1. Register Address: 0x00. DCO Frequency Control Least Significant Word (LSW) .................................................... 30
9.2. Register Address: 0x01. OE Control, DCO Frequency Control Most Significant Word (MSW) ................................. 31
9.3. Register Address: 0x02. DCO PULL RANGE CONTROL ........................................................................................ 32
9.4. Register Address: 0x03. Frac-N PLL Integer Value and Frac-N PLL Fraction MSW ................................................ 33
9.6. Register Address: 0x05. PostDiv, Driver Control ...................................................................................................... 34
9.7. Register Address: 0x06. mDriver, Driver Control ...................................................................................................... 35
10 I
2
C Operation ........................................................................................................................................................................ 36
10.1. I
2
C protocol ............................................................................................................................................................... 36
10.2. I
2
C Timing Specification ............................................................................................................................................ 39
10.3. I
2
C Device Address Modes ....................................................................................................................................... 40
Dimensions and Patterns ........................................................................................................................................................... 47
Additional Information ................................................................................................................................................................ 48
Revision History ......................................................................................................................................................................... 49
Rev 1.00
Page 3 of 49
www.sitime.com
SiT3542
340 to 725 MHz Endura™ Series I
2
C/SPI Programmable Oscillator
1 Electrical Characteristics
All Min and Max limits in the Electrical Characteristics tables are specified over temperature and rated operating voltage with
standard output terminations shown in the termination diagrams. Typical values are at 25°C and nominal supply voltage.
Table 1. Electrical Characteristics – Common to LVPECL, LVDS and HCSL
Parameter
Output Frequency Range
Symbol
f
Min.
340.000001
340.000001
Typ.
–
–
Max.
725.000000
500.000000
Unit
MHz
MHz
Condition
LVDS and LVPECL output driver, factory or user
programmable, accurate to 6 decimal places
HCSL output driver, factory or user programmable, accurate to
6 decimal places
Inclusive of initial tolerance, operating temperature, rated
power supply voltage and load variations
Frequency Range
Frequency Stability
Frequency Stability
F_stab
-20
-20
-25
-50
First Year Aging
F_1y
–
–
–
–
–
±1
–
–
–
+20
+20
+25
+50
–
ppm
ppm
ppm
ppm
ppm
1
st
-year aging at 25°C
Temperature Range
Operating Temperature Range
T_use
-20
-40
-40
+70
+85
+105
°C
°C
°C
Extended Commercial
Industrial
Extended Industrial. Available only for I
2
C operation, not SPI.
Rugged Characteristics
Acceleration (g) sensitivity,
Gamma Vector
Supply Voltage
F_g
–
–
0.1
Supply Voltage
Vdd
2.97
2.7
2.52
2.25
3.3
3.0
2.8
2.5
–
–
100
–
–
–
3.63
3.3
3.08
2.75
–
30%
–
V
V
V
V
ppb/g
Low sensitivity grade; total gamma over 3 axes; 15 Hz to
2 kHz; MIL-PRF-55310, computed per section 4.8.18.3.1
Input Characteristics – OE Pin
Input Voltage High
Input Voltage Low
Input Pull-up Impedance
VIH
VIL
Z_in
70%
–
–
Vdd
Vdd
kΩ
OE pin
OE pin
OE pin, logic high or logic low
Output Characteristics
Duty Cycle
DC
45
–
–
55
%
Startup and Output Enable/Disable Timing
Start-up Time
Output Enable/Disable Time –
Hardware control via OE pin
Output Enable/Disable Time –
Software control via I
2
C/SPI
T_start
T_oe_hw
3.0
9.1
ms
µs
Measured from the time Vdd reaches its rated minimum value
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 9
and
Figure 10
Measured from the time the last byte of command is
transmitted via I
2
C/SPI (reg1) to the time clock pins reach 90%
of swing and high-Z. See
Figure 30
and
Figure 31
T_oe_sw
–
–
11.8
µs
Rev 1.00
Page 4 of 49
www.sitime.com
SiT3542
340 to 725 MHz Endura™ Series I
2
C/SPI Programmable Oscillator
Table 2. Electrical Characteristics – LVPECL Specific
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Current Consumption
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Maximum Output Current
Idd
I_OE
I_leak
I_driver
–
–
–
–
–
–
0.10
–
94
63
–
30
mA
mA
A
mA
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE = Low
OE = Low
Maximum average current drawn from OUT+ or OUT-
Output Characteristics
Output High Voltage
Output Low Voltage
Output Differential Voltage Swing
Rise/Fall Time
VOH
VOL
V_Swing
Tr, Tf
Vdd - 1.1V
Vdd - 1.9V
1.2
–
–
–
1.6
225
Vdd - 0.7V
Vdd - 1.5V
2.0
290
Jitter
RMS Phase Jitter (random) –
DCO Mode Only
T_phj
–
–
RMS Phase Jitter (random) –
Any-frequency Mode Only
T_phj
–
–
RMS Period Jitter
[3]
Note:
3. Measured according to JESD65B
T_jitt
–
0.22
0.075
0.23
0.09
1
0.260
0.085
0.325
0.095
1.6
ps
ps
ps
ps
ps
f = 622.08 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 622.08, IEEE802.3-2005 10 GbE jitter mask integration
bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 622.08 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 622.08, IEEE802.3-2005 10 GbE jitter mask integration
bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 622.08 MHz, Vdd = 3.3V or 2.5V
V
V
V
ps
See
Figure 5
See
Figure 5
See
Figure 6
20% to 80%, see
Figure 6
Table 3. Electrical Characteristics – LVDS Specific
Parameter
Symbol
Min.
Typ.
Max.
Unit
Condition
Current Consumption
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Idd
I_OE
I_leak
–
–
–
–
–
0.15
89
67
–
mA
mA
A
Excluding Load Termination Current, Vdd = 3.3V or 2.5V
OE = Low
OE = Low
Output Characteristics
Differential Output Voltage
Delta VOD
Offset Voltage
Delta VOS
Rise/Fall Time
VOD
ΔVOD
VOS
ΔVOS
Tr, Tf
250
–
1.125
–
–
–
–
–
–
340
530
50
1.375
50
460
Jitter
RMS Phase Jitter (random) –
DCO Mode Only
T_phj
–
–
RMS Phase Jitter (random) –
Any-frequency Mode Only
T_phj
–
–
RMS Period Jitter
[4]
Note:
4. Measured according to JESD65B.
T_jitt
–
0.21
0.060
0.21
0.070
1
0.255
0.070
0.320
0.80
1.6
ps
ps
ps
ps
ps
f = 622.08 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 622.08 MHz, IEEE802.3-2005 10 GbE jitter mask
integration bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 622.08 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 622.08 MHz, IEEE802.3-2005 10 GbE jitter mask
integration bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 622.08 MHz, Vdd = 3.3V or 2.5V
mV
mV
V
mV
ps
f = 622.08 MHz. See
Figure 7
See
Figure 7
See
Figure 7
See
Figure 7
Measured with 2 pF capacitive loading to GND, 20% to 80%,
Machine learning (ML) techniques are used to build devices with advanced capabilities and have been applied in many fields. These devices apply trained machine learning techniques to recognize certain...
In 1 second, 0.5 seconds on, 0.5 seconds off, the duty cycle is 50%, right? Then, in 1 millisecond, 0.5 milliseconds on, 0.5 milliseconds off, the duty cycle is also 50%, right? If it is 1 second, the...
Live Topic: C-V2X (Internet of Vehicles) Testing Challenges and Solutions
Live broadcast time: Wednesday, October 9, 15:00-17:00
Live broadcast content:
Wireless communication technology promises to m...
IapErase(0x2000);for(i=0;i64;i++){IapProgram(0x2000+i,i);}b=IapRead(0x2001);This is the EEPROM program of STC. Logically, the value of b should be 1, right? Why is it 63?...
Testing of heating power of NOx sensorSensors based on the Nerst equation and using zirconium oxide ( YSZ ) as the base need to work at high temperatures. This type of sensor is widely used in the fie...
Introduction
The work collects voltage through ADC and transmits it to the cloud server through the 4G module. The protocol uses TCP transparent transmission, and the data is retained in the cloud pla...
Researcher Tang Ao from the Institute of Metal Research, Chinese Academy of Sciences, systematically described all aspects of the all-vanadium liquid flow energy storage system, from the electrolyt...[Details]
The oscilloscope probe is crucial to the accuracy and correctness of the measurement results. It is an electronic component that connects the circuit under test to the input terminal of the oscillosc...[Details]
太阳能（PV）逆变器将太阳能板产生的直流电压转换成交流电压，可用于公共电网和商用电器。光耦合器为此一过程重要组成部分，因其能防止转换过程中因元件损坏或传输失真造成的高电压和瞬变电压。本文将探讨提高光耦合器功率缓衝，使其不易受到杂讯干扰的设计技术。
Optocouplers help improve reliability of solar inverters
将太阳光转化成能量的...[Details]
Mplab x ide v_4.05 usage 1Setup standard project a.open the maplab x ide file - in the menu bar. b.wizard steps a.choose project “standard project” b.device type “PIC24HJGP306” c.select tool ...[Details]
Today, the prospects for wearable devices are very good, especially TWS headphones. Sales are gradually increasing and consumer purchasing demand is also increasing. Of course, whether it is earbud p...[Details]
ew430-ev-320a installation cracking process
Step 1:
Put the installation file in a directory (do not use Chinese, keep the directory as short as possible)
Step 2:
Start running cmd
Step 3...[Details]
IHWK uses Microchip's memBrain™ non-volatile memory computing technology and collaborates with universities to develop SoC processors for neurotechnology devices To accommodate the rapid develo...[Details]
In early February, the General Administration of Quality Supervision, Inspection and Quarantine of China released the 2015 National Supervision and Sampling Product Quality Status Announcement (No....[Details]
introduction
The spectrum analysis method based on FFT can extract useful information from signals containing noise, and has important application value in the data processing of instruments a...[Details]
According to Reuters, two people familiar with the matter revealed that the Trump administration has decided not to extend the deadline for ByteDance to divest its TikTok business, but negotiations a...[Details]
In C, the conversion of floating point to integer is truncated, and the decimal point behind is directly removed instead of rounding. For example: uint16_t(12.89)=12, not 13. A small function was w...[Details]
Würth Electronics launches current compensation signal filter WE-CNSA
Automotive non-interference data transmission applications
Waldenburg (Germany), December 14, 2022 -
...[Details]
Samsung Electronics released a report revealing that its sales of ultra-large TVs have seen significant growth. In the first three quarters of this year, sales of TVs 80 inches and above climbed 15...[Details]
Integrated technical exchanges
京公网安备 11010802033920号
EEWORLD
