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
9 I C/SPI Control Registers...................................................................................................................................................... 29
9.1. Register Address: 0x00. DCO Frequency Control Least Significant Word (LSW) .................................................... 29
9.2. Register Address: 0x01. OE Control, DCO Frequency Control Most Significant Word (MSW) ................................. 30
9.3. Register Address: 0x02. DCO PULL RANGE CONTROL ........................................................................................ 31
9.4. Register Address: 0x03. Flac-N PLL Integer Value and Flac-N PLL Fraction MSW ................................................. 32
9.6. Register Address: 0x05. PostDiv, Driver Control ...................................................................................................... 33
9.7. Register Address: 0x06. mDriver, Driver Control ...................................................................................................... 34
2
10 I C Operation ........................................................................................................................................................................ 35
2
10.1. I C protocol ............................................................................................................................................................... 35
2
10.2. I C Timing Specification ............................................................................................................................................ 37
2
10.3. I C Device Address Modes ....................................................................................................................................... 38
Dimensions and Patterns ........................................................................................................................................................... 45
Additional Information ................................................................................................................................................................ 46
Revision History ......................................................................................................................................................................... 47
Rev 0.991
Page 3 of 47
www.sitime.com
SiT3521
1 to 340 MHz Elite™ I
2
C/SPI Programmable Oscillator
1 Electrical Characteristics
PRELIMINARY
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
Frequency Stability
Symbol
f
F_stab
Min.
1
-10
-20
-25
-50
First Year Aging
Operating Temperature Range
F_1y
T_use
–
-20
-40
-40
Supply Voltage
Vdd
2.97
2.7
2.52
2.25
Input Voltage High
Input Voltage Low
Input Pull-up Impedance
Duty Cycle
Start-up Time
Output Enable/Disable Time –
Hardware control via OE pin
Output Enable/Disable Time –
Software control via I
2
C/SPI
VIH
VIL
Z_in
DC
T_start
T_oe_hw
70%
–
–
45
–
–
Typ.
–
–
–
–
–
±1
–
–
–
3.3
3.0
2.8
2.5
–
–
100
–
–
–
Max.
340
+10
+20
+25
+50
–
+70
+85
+105
Supply Voltage
3.63
3.3
3.08
2.75
–
30%
–
55
3.0
3.8
V
V
V
V
Vdd
Vdd
kΩ
%
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
OE pin
OE pin
OE pin, logic high or logic low
Unit
MHz
ppm
ppm
ppm
ppm
ppm
°C
°C
°C
1 -year aging at 25°C
Extended Commercial
Industrial
Extended Industrial. Available only for I C operation, not SPI.
2
st
Condition
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
Temperature Range
Input Characteristics – OE Pin
Output Characteristics
Startup and Output Enable/Disable Timing
T_oe_sw
–
–
6.5
µs
Rev 0.991
Page 4 of 47
www.sitime.com
SiT3521
1 to 340 MHz Elite™ I
2
C/SPI Programmable Oscillator
Table 2. Electrical Characteristics – LVPECL Specific
Parameter
Symbol
Min.
Typ.
Max.
Unit
PRELIMINARY
Condition
Current Consumption
Current Consumption
OE Disable Supply Current
Output Disable Leakage Current
Maximum Output Current
Idd
I_OE
I_leak
I_driver
–
–
–
–
–
–
0.15
–
89
58
–
32
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
–
0.225
0.1
0.225
0.11
1
0.340
0.14
0.340
0.15
1.6
ps
ps
ps
ps
ps
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration
bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 156.25, IEEE802.3-2005 10 GbE 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
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
80
61
–
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
–
–
–
–
–
–
400
455
50
1.375
50
470
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
0.1
0.21
0.1
1
0.275
0.12
0.367
0.12
1.6
ps
ps
ps
ps
ps
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 156.25, IEEE802.3-2005 10 GbE jitter mask integration
bandwidth = 1.875 MHz to 20 MHz, all Vdd levels
f = 156.25 MHz, Integration bandwidth = 12 kHz to 20 MHz,
all Vdd levels
f = 156.25, IEEE802.3-2005 10 GbE 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
mV
mV
V
mV
ps
f = 156.25MHz See
Figure 7
See
Figure 7
See
Figure 7
See
Figure 7
Measured with 2 pF capacitive loading to GND, 20% to 80%,
The increase in applications that require instantaneous backup power has led to an increase in demand for supercapacitors. Supercapacitors (also known as ultracapacitors) are electrochemical capacitor...
[font=微软雅黑][size=3]【Disclaimer Forwarding】[/size][/font][font=微软雅黑][size=3] [/size][/font] [font=微软雅黑][size=3]Here is an outsourcing project. If you have the energy and ability, please contact us:)[/s...
Live broadcast time: May 26, 10:00-11:30Live broadcast topic: ON Semiconductor image sensors, promoting the development of automobiles, machine vision and artificial intelligenceWatch replay: Click to...
I need to use Qorvo ICs in a competition. I found ECG008B-G and AH101, which are more suitable for my needs, but I found that they are out of production. Later, I found that they seem to be available ...
This Launchpad Wi-Fi reference design features the SimpleLink Wi-Fi CC3200 Internet-on-a-Chip solution with integrated MCU for Internet of Things (IoT) applications. This embedded Wi-Fi solution is a ...
1. Introduction In recent years, myopia has seriously affected people's health. In order to accurately understand the degree of myopia of myopic patients and provide more suitable glasses for them, o...[Details]
Perhaps because they need to ignite passion, many hardcore brands choose to hold new product launches in the hot month of April. On April 23, Thunder will launch its fifth anniversary event a...[Details]
Functionality of PWM Comparator
The three-phase two-level inverter used in this series of articles is still used as the control object. The figure below shows the waveform of the three-phase t...[Details]
The 3.3V main power supply is composed of a step-down monolithic synchronous switching power supply TPS62000; this device has a soft start function, which can effectively suppress input surge current...[Details]
Famous humanoid
robot
manufacturer Agility Robotics recently announced that veteran technology executive Peggy Johnson will serve as the company's CEO, replacing co-founder Damion Shelton. ...[Details]
Xiao Lichun, Chairman and Party Secretary of State Grid Hubei Electric Power Co., Ltd.
The State Grid Corporation of China's 2019 mid-year work conference required that the construction of a w...[Details]
Simple NFS Configuration
NFS is a simple way to achieve communication access between two machines. In the embedded Linux experiment, we configure NFS to achieve access between the PC and the experi...[Details]
Electronic truck scale is a kind of precision weighing equipment, which is widely used in various fields of logistics, warehousing and industrial production. As an electronic weighing instrument, t...[Details]
The 16th "China Core" Integrated Circuit Industry Promotion Conference was grandly held On December 20, the 2021 16th "China Core" Integrated Circuit Industry Promotion Conference and the "China...[Details]
Using 8MHz external HSE clock, the program's clock setting parameter flow is as follows: 1. Reset the RCC register to the default value: RCC_DeInit(); 2. Turn on the external high...[Details]
0 Introduction
The original front-end acquisition system of the seismograph used in seismic exploration uses sampling/holding circuit + instantaneous floating point amplifier (FPA) + 14-bi...[Details]
When reading kernel source code, you often encounter IS_ERR, such as in linux/arch/arm/kernel/sys_arm.c
view plain copy
print ?
asmlinkage int sys_execve(char __user *filenam...[Details]
•The Prime Minister of Malaysia, the Chief Minister of Kedah and Infineon Technologies management attended the launch ceremony of the production operation of the first phase of the new wafer fab ...[Details]
Large-screen TV walls can bring more shocking and realistic images to the audience. As TV viewers have higher and higher requirements for the quality of TV screen images, large-screen TV walls are ...[Details]
Delixi inverter is a device widely used in the field of industrial automation, especially in the constant pressure water supply system, which can realize the precise control of the water pump and e...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
