L: output is low level (weak pull down) oscillation stops
SiTime Corporation
Rev. 1.44
990 Almanor Avenue, Suite 200
Sunnyvale, CA 94085
(408) 328-4400
www.sitime.com
Revised January 15, 2010
SiT8002
1 to 125 MHz Programmable Oscillator
Description
The SiT8002 oscillator family is composed of the world’s
smallest, high-performance programmable oscillators. The
SiT8002 is suitable for use in clock generation for consumer,
portable, industrial, automotive, and computation applications.
This oscillator family is packaged in standard low-cost plastic
QFN-type IC packages with footprints that match common
quartz surface mount products.
MEMS resonators are 1000x smaller by volume than quartz
resonators and are built in high volume CMOS fabs instead of
small custom manufacturing facilities. Due to their small size,
massive lot sizes, and simpler manufacturing processes
MEMS oscillators are inherently more reliable, have more
consistent performance and are always in stock.
The SiT8002, by eliminating the quartz crystals, has improved
immunity to the environmental effects of vibration, shock,
strain, and humidity.
To order samples, go to www.sitime.com and click on Request
Sample” link.
Absolute Maximum Ratings
Attempted operation outside the absolute maximum ratings of the part may cause permanent damage to the part. Actual perfor-
mance of the IC is only guaranteed within the operational specifications not absolute maximum ratings.
Ab
solute Maximum Table
Parameter
Storage Temperature
VDD
Electrostatic Discharge
Theta JA (with copper plane on VDD and GND)
Theta JC (with PCB traces of 0.010 inch to all pins)
Soldering Temperature (follow standard Pb free soldering guidelines)
Number of Program Writes
Program Retention over -40 to 125C, Process, VDD (0 to 3.6V)
–
–
Min.
-65
-0.5
Max.
150
+3.65
6000
75
24
260
1
1,000+
Unit
°
C
V
V
°
C/W
°
C/W
°
C
NA
years
Operating Conditions
Parameter
Supply Voltages,
VDD
[1]
Min.
2.97
2.25
1.7
Extended Commercial Operating Temperature
Industrial Operating Temperature
Maximum Load
Capacitance
[2]
VDD Ramp Time
-20
-40
-
0
Typ.
3.3
2.5
1.8
-
-
-
-
Max.
3.63
2.75
1.9
70
85
15
200
Unit
V
V
V
°
C
°
C
pF
ms
Environmental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Moisture Sensibility 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
Notes:
1. The 2.5V device can operate from 2.25V to 3.63V with higher output drive, however, the data sheet parameters cannot be guaranteed. Please contact factory for
this option.
2. The output driver strength can be programmed to drive up to 30pF load. Please contact factory for this option.
Rev. 1.43
Page 2 of 7
www.sitime.com
SiT8002
1 to 125 MHz Programmable Oscillator
DC Electrical Specifications
@VDD = 3.3V ±10%, -40 to 85°
C
Parameter
Output Voltage High
Output Voltage Low
Input Voltage High
Input Voltage Low
Operating Current
Standby Current
Power Up Time
Condition
IOH = -9 mA
IOL = 9 mA
Pin 1
Pin 1
Output frequency = 65 MHz, 15 pF load
Output is weakly pulled down, ST = GND
Time from minimum power supply voltage
Min.
90
-
70
-
-
-
-
Typ.
-
-
-
-
-
30
12
Max.
-
10
-
30
22
50
50
Unit
%Vdd
%Vdd
%Vdd
%Vdd
mA
uA
ms
@VDD = 2.5V ±10%, -40 to 85°
C
Parameter
Output Voltage High
Output Voltage Low
Input Voltage High
Input Voltage Low
Operating Current
Standby Current
Power Up Time
Condition
IOH = -7 mA
IOL = 7 mA
Pin 1
Pin 1
Output frequency = 65 MHz, 15 pF load
Output is weakly pulled down, ST = GND
Time from minimum power supply voltage
Min.
90
-
70
-
-
-
-
Typ.
-
-
-
-
-
30
12
Max.
-
10
-
30
22
50
50
Unit
%Vdd
%Vdd
%Vdd
%Vdd
mA
uA
ms
@VDD = 1.8V ±5%, -40 to 85°
C
Parameter
Output Voltage High
Output Voltage Low
Input Voltage High
Input Voltage Low
Operating Current
Standby Current
Power Up Time
Condition
IOH = -5 mA
IOL = 5 mA
Pin 1
Pin 1
Output frequency = 65 MHz, 15 pF load
Output is weakly pulled down, ST = GND
Time from minimum power supply voltage
Min.
90
-
70
-
-
-
-
Typ.
-
-
-
-
-
30
12
Max.
-
10
-
30
19
50
50
Unit
%Vdd
%Vdd
%Vdd
%Vdd
mA
uA
ms
Rev. 1.43
Page 3 of 7
www.sitime.com
SiT8002
1 to 125 MHz Programmable Oscillator
AC Electrical Specifications
@VDD = 3.3V ±10%, -40 to 85°
C
Parameter
Clock Output Frequency
Frequency Stability
[3]
Condition
Inclusive of initial stability, operating temperature,
rated power supply voltage change, load change,
aging, shock and vibration
First year
Output frequency= 1 MHz to 125 MHz
15 pF Load, 20% to 80% VDD
15 pF Load, 80% to 20% VDD
Output frequency = 24 MHz
Output frequency = 100 MHz
Min.
1
-30
-50
-100
-
45
-
-
-
-
Typ.
-
-
-
-
-
-
1.0
1.0
-
-
Max.
125
+30
+50
+100
1
55
2.0
2.0
±98
±60
Unit
MHz
ppm
ppm
ppm
ppm
%
ns
ns
ps
ps
Aging
Clock Output Duty Cycle
Clock Output Rise Time
Clock Output Fall Time
Pk-pk Period Jitter
@VDD = 2.5V ±10% or 2.8 ±10%, -40 to 85°
C
Parameter
Clock Output Frequency
Frequency Stability
[3]
Inclusive of initial stability, operating temperature,
rated power supply voltage change, load change,
aging, shock and vibration
First year
Output frequency = 1MHz to 125MHz
15 pF Load, 20% to 80% VDD
15 pF Load, 80% to 20% VDD
Output frequency = 24 MHz
Output frequency = 100 MHz
Condition
Min.
1
-30
-50
-100
-
45
-
-
-
-
Typ.
-
-
-
-
-
-
1.0
1.0
-
-
Max.
125
+30
+50
+100
1
55
2.0
2.0
±130
±60
Unit
MHz
ppm
ppm
ppm
ppm
%
ns
ns
ps
ps
Aging
Clock Output Duty Cycle
Clock Output Rise Time
Clock Output Fall Time
Pk-pk Period Jitter
@VDD = 1.8V ±5%, -40 to 85°
C
Parameter
Clock Output Frequency
Frequency
Stability
[3]
Inclusive of initial stability, operating temperature,
rated power supply voltage change, load change,
aging, shock and vibration
First year
Output frequency = 1 MHz to 65MHz
Output frequency = 65 MHz to 125MHz
Clock Output Rise Time
Clock Output Fall Time
Pk-pk Period Jitter
15 pF Load, 20% to 80% VDD
15 pF Load, 80% to 20% VDD
Output frequency = 24 MHz
Output frequency = 100 MHz
Notes:
3. ±30 ppm is available only for VDD=2.5V or 3.3V.
Condition
Min.
1
-50
-100
-
45
40
-
-
-
-
Typ.
-
-
-
-
-
-
1.0
1.0
-
-
Max.
125
+50
+100
1
55
60
2.0
2.0
±185
±100
Unit
MHz
ppm
ppm
ppm
%
%
ns
ns
ps
ps
Aging
Clock Output Duty Cycle
Rev. 1.43
Page 4 of 7
www.sitime.com
SiT8002
1 to 125 MHz Programmable Oscillator
Ordering Information
SiT8002AC-14-33E - 123.12345T
Packaging:
Part Family
“SiT8002”
Revision Letter
“A” is the revision
Temperature Range
“C” Commercial, -20 to
o
70C
“I” Industrial, -40 to
o
85C
Voltage Supply
Output Drive Strength
[4]
“
-
” Default
“18” for 1.8V ± 10%
“25” for 2.5V ± 10%
“28” for 2.8V ± 10%
“33” for 3.3V ± 10%
Frequency Tolerance
“3” for ± 50 PPM
“4” for ± 100 PPM
“8” for ± 30 PPM
Feature Pin
“E” for Output Enable
“S” for Standby
“T” for Tape & Reel (3Ku Reel)
“Y” for Tape & Reel (1Ku Reel)
Blank for Bulk
Frequency
1.00000 to 125.00000 MHz
Package Size
“1” 2.5 x 2.0 mm
“2” 3.2 x 2.5 mm
“3” 5.0 x 3.2 mm
“4” 7.0 x 5.0 mm
Note:
4. Contact SiTime for different output drive strength options.
据外媒报道，萨里大学（University of Surrey）的研究人员开发出一种无需依赖GPS即可在人口密集的城市地区精确定位设备位置的人工智能系统。该系统可将定位误差从734米缩小到22米以内，这对于自动驾驶汽车和救援车辆等技术的发展意义重大。 图片来源： 萨里大学 在发表于《IEEE Robotics and Automation Letters》的论文中，研究人员介绍了PEn...[详细]
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