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%,
This 10 cm "tile" sized antenna operates well within its designed range in the 2.45 GHz ISM band. Use it for WiFi, Bluetooth or any other service that uses this popular unlicensed radio band.
For an i...
With the development of data communication and multimedia service demand, 4G mobile communication has begun to rise. 4G has also highlighted its increasingly important position because of its ultra-hi...
Once the system is built, its functionality is tested and the instrumentation setup is optimized to obtain the best measurements.For the open state characteristic analysisIn most of the on-state chara...
1. CPU Registers The CPU registers are used to address or process data. With the cooperation of relevant commands (L, T, ...), data can be exchanged between the CPU memory area and the registers. 1) A...
Generate 500us continuous square wave pulse. ANL TMOD ,#0FH ORL TMOD ,#00H:: ??? I think this instruction can be removed. Is it possible? Can an expert give me some advice? MOV TH1，#0CH MOV TL1,#03H M...
Today's computer peripherals are pursuing high speed and high versatility. In order to meet user needs, seven companies led by Intel launched the USB (Universal Serial Bus) bus protocol in 1994, wh...[Details]
Microchip's PIC18F46J50 is a low-power, high-performance 8-bit USB microcontroller (MCU) using nanoWatt XLP technology. The current in deep sleep mode can be as low as 13nA, the operating voltage i...[Details]
Two simple circuits are implemented to drive two LEDs from a battery powered microprocessor.
This design is based on a circuit that uses three resistors and a microprocessor I/O pin as an input h...[Details]
The solidification and modularization of intelligent video analysis algorithms are the current trends in the application of intelligent video analysis technology. It perfectly combines intelligent ...[Details]
The data collector of the automatic weather station is generally designed based on a single-chip microcomputer or a PC/104 bus controller. It has the characteristics of good compatibility with PC, low...[Details]
A multi-point temperature control heating control system was designed using the SST89E564RC single-chip microcomputer and a new temperature measuring device. The heating system can be controlled in...[Details]
AD8205 is
a single-supply high-performance differential
amplifier
launched by
Analog
Devices of the United States
. The typical single-supply voltage is 5V, and its common-mode volta...[Details]
Microcalorimetry
is used to determine energy relationships. Microcalorimetry techniques are often required when performing calorimetric experiments with small sample sizes or slow heating rat...[Details]
Aromatic gases are widely present in food, medicine, cosmetics and various daily chemical products, such as snacks, liquor, spices, Chinese herbal medicines, plasters, perfumes, soaps, shampoos, et...[Details]
1 Introduction
Building Automation System (BAS) is a distributed monitoring system (DCS) designed according to distributed information and control theory. It is the result of the mutual de...[Details]
1 Introduction
With the development of control, computer, communication, network technology, etc., a new control technology, namely fieldbus, has emerged in the field of industrial control...[Details]
my country is a big country in agriculture, grain production and consumption. Grains are a necessary condition for our nation to survive and develop. The flour processing industry will exist forever w...[Details]
LED lamps and bulbs are now rapidly replacing incandescent, halogen and CFL (compact fluorescent lamp) light sources in many general lighting applications. Flyback DC/DC converters are the power su...[Details]
In recent years, with the rapid development of the information industry, dot matrix LED display screens have been widely used in various advertising and information display systems such as the fina...[Details]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
