Ordering Information .................................................................................................................................................................... 2
User Programming Interface ..................................................................................................................................... 18
Start-up output frequency and signaling types ........................................................................................................... 18
Any-frequency function ............................................................................................................................................. 19
C/SPI Control Registers...................................................................................................................................................... 28
9 I
Register Address: 0x00. DCO Frequency Control Least Significant Word (LSW) .................................................... 28
Register Address: 0x01. OE Control, DCO Frequency Control Most Significant Word (MSW) ................................. 29
Register Address: 0x02. DCO PULL RANGE CONTROL ........................................................................................ 29
Register Address: 0x03. Frac-N PLL Feedback Divider Integer Value and Frac-N PLL Feedback Divider Fraction
Value MSW ............................................................................................................................................................... 30
Register Address: 0x05. Forward Divider, Driver Control ......................................................................................... 30
Register Address: 0x06. Driver Divider, Driver Control ............................................................................................. 31
2
C Operation ........................................................................................................................................................................ 32
10 I
I
2
C protocol ............................................................................................................................................................... 32
I
2
C Timing Specification ............................................................................................................................................ 35
I
2
C Device Address Modes ....................................................................................................................................... 36
Dimensions and Patterns ........................................................................................................................................................... 43
Additional Information ................................................................................................................................................................ 44
Revision History ......................................................................................................................................................................... 45
Rev 1.01
Page 3 of 45
www.sitime.com
SiT3521
1 to 340 MHz Elite Platform I2C/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.
1
Typ.
–
–
–
–
–
±1
–
–
–
Max.
340
Unit
MHz
Condition
Factory or user programmable, accurate to 6 decimal places
Frequency Range
Frequency Stability
Frequency Stability
F_stab
-10
-20
-25
-50
First Year Aging
F_1y
–
+10
+20
+25
+50
–
ppm
ppm
ppm
ppm
ppm
°C
°C
°C
1
st
-year aging at 25°C
Inclusive of initial tolerance, operating temperature, rated
power supply voltage and load variations.
Temperature Range
Operating Temperature Range
T_use
-20
-40
-40
+70
+85
+105
Supply Voltage
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
Extended Commercial
Industrial
Extended Industrial. Available only for I
2
C operation, not SPI.
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
3.8
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
–
–
6.5
µs
Rev 1.01
Page 4 of 45
www.sitime.com
SiT3521
1 to 340 MHz Elite Platform I2C/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
–
–
–
–
–
–
0.15
–
89
58
–
32
mA
mA
A
mA
Excluding Load Termination Current, Vdd = 3.3 V or 2.5 V
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 = 3.3 V or 2.5 V
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 = 3.3 V or 2.5 V
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 = 3.3 V or 2.5 V
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%,
[i=s] This post was last edited by Yunhu Congbai on 2022-1-26 14:29 [/i] ## Unboxing The board I ordered on the afternoon of January 20th arrived by plane on the morning of January 21st. In one word, ...
I just started learning Verilog HDL programming in college. The course design is to make a simple digital clock, but when downloading the code to the board, it fails. What is the reason for this? Than...
The load is an ozone generator 3.7V, the working current is 400ma, and the battery power supply is 3.7V 2500MAH controlled by the Pmos switch . During use, it is found that after the ozone module work...
[i=s]This post was last edited by damiaa on 2021-3-16 14:42[/i]Silk screen is AA6B
SOT23-6 package
With 2.2UH inductor
3.7~4.2V boost to 5V
With picturesAsk for model number!!!...
A:
I would like to ask, I want to add uart6 driver to CB140, how do I determine the address of this pin?
I want to add uart6 now
As shown
B:
arch/arm/boot/dts/myimx6ek140p-8uart.dtsi
Dual Ethernet and...
I just saw an article from Avnet on the Internet, and I also want to know the answer to the question.The speed of charging is a "complaint". For example, it takes about 36 minutes to fully charge an e...
Jiwei.com reported on March 25 that the official Weibo account of realme mobile phone revealed today the new color scheme "Final Fantasy" of the realme GT Neo, which will be released on March 31. O...[Details]
Recently, the Jinan Municipal Development and Reform Commission, the State-owned Assets Supervision and Administration Commission, and the Office Service Center jointly issued a document to acceler...[Details]
macro restore_user_regs
ldr r1,
ldr lr, ! @ !Used to control whether the final new address of base address indexing is written back.
@ After executing ldr, sp is writte...[Details]
Sina Digital News reported on the evening of September 4 that Honor released the Honor Watch GS Pro and two smart watches at the IFA Berlin International Consumer Electronics Show. These two wa...[Details]
STM32 has an IIC interface, which has the following main features Multi-host function: the module can be used as both a master device and a slave device Main device function C address detecti...[Details]
Jered Chinnock stands with assistance (Image credit: Mayo Clinic) "'Lift your legs, kick your feet, lift your legs, kick your feet...' I repeat this to myself every time I take a step." This has ...[Details]
Not long ago, the Traffic Management Bureau released the latest data on motor vehicles and drivers in the first half of the year. According to statistics, as of June 2019, the number of new energy ve...[Details]
The link that requires careful design in the HDD is the interconnect between the preamplifier and the read/write head assembly. This interconnect is a key component that enables the HDD to read and...[Details]
The application of ultra-high brightness LEDs continues to expand, first entering the market field of special lighting and moving towards the general lighting market. As the input power of LED chip...[Details]
HMC-ALH444 Supplier HMC-ALH444 How to order HMC-ALH444 Price
The HMC-ALH444 is a GaAs MMIC HEMT low noise broadband amplifier chip that operates between 1 and 12 GHz. The amplifier provides 17...[Details]
LG Energy Solution and the University of California, San Diego (UCSD) jointly developed a new generation of all-solid-state battery technology that has overcome the difficulty of charging in an envir...[Details]
Rutronik Elektronische Bauelemente GmbH is expanding its portfolio with products from HMS Industrial Networks, a manufacturer of industrial communication and IoT solutions. The two companies have sig...[Details]
(Image source: www.traffictechnologytoday.com) According to foreign media reports, Atlanta NFCID (North Fulton Community Improvement District) has partnered with Applied Information Inc., a smar...[Details]
ams OSRAM and Longjing Optoelectronics jointly develop Vegalas™ RGB laser modules to support LBS AR modules and make smart glasses lighter
Longjing
Optoelectronics released a d...[Details]
Focusing on smart power and smart industry to build a sustainable future
Shenzhen, China, October 28, 2024 –
STMicroelectronics (ST), a world-leading semiconductor company servin...[Details]
GD32 MCU
京公网安备 11010802033920号
EEWORLD
