Experiment with different options for optimal timing margin
Configure different drive strengths for best EMI and/or to
drive larger loads
Fast prototype builds
Wide variety of programmable options
• Frequency from 1 – 625 MHz
• Frequency stability from ±20 to ±50 ppm
• Supply voltages of 1.8V or 2.5 to 3.3V
• Operating temperature up to 125 °C and down to -55°C
• Package sizes for 2.0 x 1.6 mmxmm to 7.0 x 5.0 mmxmm
• Pull ranges from ±25 to ±1600 ppm (VCXO only)
• Spread percentage from ±0.25% to ±2% or -0.5% to -4%
(Spread spectrum only)
• Rise/fall time from 0.25 ns to 40 ns
Pb-free, RoHS and REACH compliant
Figure 1 illustrates the simple programming setup required for
programming SiTime FP devices by using the SiT6100DK, a
field programming kit. Refer to SiT6100DK quick start guide
and
other
documents
for
more
information
http://www.sitime.com/time-machine.
For production volume, SiTime offers factory programming of
its entire portfolio with the shortest lead time available in the
industry.
Description
SiTime offers a wide range of field programmable (FP) MEMS
oscillators including simple oscillators, differential oscillators,
high temperature oscillators, VCXO and spread spectrum
oscillators. These FP devices support the same specifications
and performance as their factory-programmed counterparts.
They enable engineers to experiment with different configura-
tions and generate customized samples in seconds for fast
prototyping.
Figure 1. Field Programmable Software and Hardware
SiTime Corporation
Rev. 1.4
990 Almanor Avenue, Sunnyvale, CA 94085
(408) 328-4400
www.sitime.com
Revised March 14, 2016
Field Programmable Oscillator
The Smart Timing Choice
Field Programmable Device Ordering
Information
A FP device works as a superset of its programmed
counterpart. In certain cases, it can also be mapped to
different programmed base products.
As an example, SiT8008AI-71-XXX-000.FP0000 is a field
programmable device in the low power family. It comes in the
2.1 x 1.6 mm x mm package, and can be programmed to
support different combinations of the following:
• Frequency: 1 MHz to 110 MHz with 6 decimal places of
accuracy
• Frequency stability: ±20 ppm, ±25 ppm, ±50 ppm
• Temperature range: -20°C to 70°C, -40°C to 85°C
• Supply voltages: 1.8V or 2.5V to 3.3V
• Output drive strength: 8 different options for different rise/fall
time
In addition, the SiT8008AI-11--XXX-000.FP0000 can be used
for either SiT1602 or SiT8008 in the 2.0 x 1.6 mm x mm
package. The SiT1602 and the SiT8008 share similar
electrical specs and the same field programmable devices, but
they support different frequencies.
Below is a complete summary of all currently available field
programmable devices, the mapping to the programmed
devices and the supported programmable options.
Contact
SiTime
for devices of your interest that are not
covered here.
Table 1. Field Programmable Devices - MEMS XO[1]
Oscillator
Product
Family
Field Programmable (FP)
Part Number
SiT8008BI-71-XXX-000.FP0000
SiT8008BI-11-XXX-000.FP0000
SiT8008BI-21-XXX-000.FP0000
SiT8008BI-31-XXX-000.FP0000
Low Power
Single-Ended
Oscillator
SiT8008BI-81-XXX-000.FP0000
SiT8009BI-71-XXX-000.FP0000
SiT8009BI-11-XXX-000.FP0000
SiT8009BI-21-XXX-000.FP0000
SiT8009BI-31-XXX-000.FP0000
SiT8009BI-81-XXX-000.FP0000
SiT8208AI-G1-XXX-000.FP0000
SiT8208AI-21-XXX-000.FP0000
Ultra-
Performance
Single-Ended
Oscillator
SiT8208AI-31-XXX-000.FP0000
SiT8208AI-81-XXX-000.FP0000
SiT8209AI-G1-XXX-000.FP0000
SiT8209AI-21-XXX-000.FP0000
SiT8209AI-31-XXX-000.FP0000
SiT8209AI-81-XXX-000.FP0000
SiT9121AI-1B1-XXX000.FP0000
SiT9121AI-1C1-XXX000.FP0000
SiT9121AI-1D1-XXX000.FP0000
SiT9121AI-2B1-XXX000.FP0000
High
Performance
Differential
Oscillator
SiT9121AI-2C1-XXX000.FP0000
SiT9121AI-2D1-XXX000.FP0000
SiT9122AI-1B1-XXX000.FP0000
SiT9122AI-1C1-XXX000.FP0000
SiT9122AI-1D1-XXX000.FP0000
SiT9122AI-2B1-XXX000.FP0000
SiT9122AI-2C1-XXX000.FP0000
SiT9122AI-2D1-XXX000.FP0000
SiT9122
SiT9120,
SiT9121
SiT8209
SiT8208
SiT8009
SiT1602
SiT8008
Supported Signaling
Devices
Type
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVPECL
LVPECL
LVPECL
LVDS
LVDS
LVDS
LVPECL
LVPECL
LVPECL
LVDS
LVDS
LVDS
Frequency
Range
(MHz)
1 to 110
1 to 110
1 to 110
1 to 110
1 to 110
115 to 137
115 to 137
115 to 137
115 to 137
115 to 137
1 to 80
1 to 80
1 to 80
1 to 80
80 to 220
80 to 220
80 to 220
80 to 220
1 to 220
1 to 220
1 to 220
1 to 220
1 to 220
1 to 220
220 to 625
220 to 625
220 to 625
220 to 625
220 to 625
220 to 625
Frequency
Stability
(ppm)
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25, ±50
Temp Range
(°C)
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 85, -20 to 70
Voltage
(V)
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
1.8V, 2.5-3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
Package
Size
(mm x mm)
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
Rev. 1.4
Page 2 of 11
www.sitime.com
Field Programmable Oscillator
The Smart Timing Choice
Table 1. Field Programmable Devices - MEMS XO[1] (continued)
Oscillator
Product
Family
Field Programmable (FP)
Part Number
SiT8920BM-71-XXX-000.FP0000
SiT8920BM-11-XXX-000.FP0000
SiT8920BM-21-XXX-000.FP0000
SiT8920BM-31-XXX-000.FP0000
SiT8920BM-81-XXX-000.FP0000
High
Temperature
Single-Ended
Oscillator
SiT8921BM-71-XXX-000.FP0000
SiT8921BM-11-XXX-000.FP0000
SiT8921BM-21-XXX-000.FP0000
SiT8921BM-31-XXX-000.FP0000
SiT8921BM-81-XXX-000.FP0000
SiT2024BM-S1-XXX-000.FP0000
SiT2025BM-S1-XXX-000.FP0000
SiT8924BM-71-XXX-000.FP0000
SiT8924BM-11-XXX-000.FP0000
SiT8924BM-21-XXX-000.FP0000
SiT8924BM-31-XXX-000.FP0000
SiT8924BM-81-XXX-000.FP0000
SiT8925BM-71-XXX-000.FP0000
SiT8925BM-11-XXX-000.FP0000
SiT8925BM-21-XXX-000.FP0000
SiT8925BM-31-XXX-000.FP0000
SiT8925BM-81-XXX-000.FP0000
SiT2001BI-S1-XXX-000.FP0000
SiT2002BI-S1-XXX-000.FP0000
SiT2020BM-S1-XXX-000.FP0000
SiT2021BM-S1-XXX-000.FP0000
SiT2001
SiT2002
SiT2018,
SiT2020
SiT2019,
SiT2021
SiT8925
SiT8924
SiT2024
SiT2025
SiT1618,
SiT8918,
SiT8920
Supported
Devices
Signaling
Type
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
Frequency
Range
(MHz)
1 to 110
1 to 110
1 to 110
1 to 110
1 to 110
115.194001 or
119.342001 to 137
115.194001 or
119.342001 to 137
115.194001 or
119.342001 to 137
115.194001 or
119.342001 to 137
115.194001 or
119.342001 to 137
1 to 110
115.20 to 137
1 to 110
1 to 110
1 to 110
1 to 110
1 to 110
115.20 to 137
115.20 to 137
115.20 to 137
115.20 to 137
115.20 to 137
1 to 110
115 to 137
1 to 110
115.194001 or
119.342001 to 137
Frequency
Stability
(ppm)
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
±20, ±25, ±50
±20, ±25, ±50
±20, ±25,
±30, ±50
±20, ±25,
±30, ±50
Temp
Range (°C)
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
-40 to 85, -20 to 70
-40 to 85, -20 to 70
-40 to 105, -40 to 125,
-55 to 125
-40 to 105, -40 to 125,
-55 to 125
Voltage Package Size
(V)
(mm x mm)
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.9 x 2.8
2.9 x 2.8
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.0 x 1.6
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.9 x 2.8
2.9 x 2.8
2.9 x 2.8
2.9 x 2.8
SiT8919,
SiT8921
AEC-Q100
Automotive
Oscillator
Clock
Generator
Oscillator
LVCMOS
Note:
1. Revision number which is placed right after SiTXXXX in the part number is fixed and not programmable. For instance, SiT8008A cannot be programed to SiT8008B.
Rev. 1.4
Page 3 of 11
www.sitime.com
Field Programmable Oscillator
The Smart Timing Choice
Table 2. Field Programmable Devices - MEMS VCXO[2]
Oscillator
Product
Family
Field Programmable (FP)
Part Number
SiT3808AI-G2-XXXX-000.FP0000
SiT3808AI-22-XXXX-000.FP0000
SiT3808AI-32-XXXX-000.FP0000
High
SiT3808AI-82-XXXX-000.FP0000
Performance
Single-Ended
SiT3809AI-G2-XXXX-000.FP0000
VCXO
SiT3809AI-22-XXXX-000.FP0000
SiT3809
SiT3809AI-32-XXXX-000.FP0000
SiT3809AI-82-XXXX-000.FP0000
SiT3821AI-1C2-XXXX000.FP0000
SiT3821AI-1D2-XXXX000.FP0000
SiT3821
SiT3821AI-2C2-XXXX000.FP0000
High
Performance
Differential
VCXO
SiT3821AI-2D2-XXXX000.FP0000
SiT3822AI-1C2-XXXX000.FP0000
SiT3822AI-1D2-XXXX000.FP0000
SiT3822
SiT3822AI-2C2-XXXX000.FP0000
SiT3822AI-2D2-XXXX000.FP0000
LVDS
LVDS
220 to 625
220 to 625
±25, ±50
±25, ±50
LVDS
LVDS
LVPECL
LVPECL
1 to 220
1 to 220
220 to 625
220 to 625
±25, ±50
±25, ±50
±25, ±50
±25, ±50
LVCMOS
LVCMOS
LVPECL
LVPECL
80 to 220
80 to 220
1 to 220
1 to 220
±25, ±50
±25, ±50
±25, ±50
±25, ±50
SiT3807,
SiT3808
Supported Signaling
Devices
Type
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
Frequency
Range
(MHz)
1 to 80
1 to 80
1 to 80
1 to 80
80 to 220
80 to 220
Frequency
Stability
(ppm)
±25, ±50
±25, ±50
±25, ±50
±25, ±50
±25, ±50
±25, ±50
Temp
Range
(°C)
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
Voltage
(V)
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
1.8V,
2.5-3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
2.5V, 3.3V
Pull
Range
(ppm)
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
±25 to
±1600
Package
Size
(mm x mm)
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
5.0 x 3.2
7.0 x 5.0
5.0 x 3.2
7.0 x 5.0
5.0 x 3.2
7.0 x 5.0
5.0 x 3.2
7.0 x 5.0
Note:
2. Revision number which is placed right after SiTXXXX in the part number is fixed and not programmable. For instance, SiT8008A cannot be programed to SiT8008B.
Rev. 1.4
Page 4 of 11
www.sitime.com
Field Programmable Oscillator
The Smart Timing Choice
Table 3. Field Programmable Devices - MEMS Spread Spectrum XO[3]
Oscillator
Product
Family
Field Programmable (FP)
Part Number
SiT9001AI-13-XXXX-000.FP000
SiT9001AI-23-XXXX-000.FP000
SiT9001
SiT9001AI-33-XXXX-000.FP000
SiT9001AI-83-XXXX-000.FP000
SiT9003AI-13-33XX-000.FP000
Spread
Spectrum
Single-Ended
Oscillator
SiT9003AI-23-33XX-000.FP000
SiT9003AI-33-33XX-000.FP000
SiT9003AI-83-33XX-000.FP000
SiT9003
SiT9003AI-13-18XX-000.FP000
SiT9003AI-23-18XX-000.FP000
SiT9003AI-33-18XX-000.FP000
SiT9003AI-83-18XX-000.FP000
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVPECL
LVDS
HCSL
CML
SiT9002
SiT9002AI-X82XXXXX000.FP000
LVPECL
LVDS
HCSL
CML
1 to 220
1 to 110
1 to 110
1 to 110
1 to 110
±50, ±100
±50, ±100
±50, ±100
±50, ±100
-20 to 70:
±25, ±50
-40 to 85:
±50
-20 to 70:
±25, ±50
-40 to 85:
±50
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
1 to 200
1 to 200
1 to 110
1 to 110
1 to 110
1 to 110
±50, ±100
±50, ±100
±50, ±100
±50, ±100
±50, ±100
±50, ±100
Supported
Devices
Signaling
Type
LVCMOS
LVCMOS
Frequency Frequency
Range
Stability
(MHz)
(ppm)
1 to 200
1 to 200
±50, ±100
±50, ±100
Temp
Range
(°C)
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
-40 to 85,
-20 to 70
Voltage
(V)
1.8V,
2.5V, 3.3V
1.8V,
2.5V, 3.3V
1.8V,
2.5V, 3.3V
1.8V,
2.5V, 3.3V
2.5V, 2.8V,
3.3V
2.5V, 2.8V,
3.3V
2.5V, 2.8V,
3.3V
2.5V, 2.8V,
3.3V
±0.25% to ±0.5%
-0.5% to -1%
1.8V
1.8V
1.8V
1.8V
±0.25% to ±1%
-0.5% to -2%
Spread
Percentage
Package
Size
(mm x mm)
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
2.5 x 2.0
3.2 x 2.5
5.0 x 3.2
7.0 x 5.0
SiT9002AI-X32XXXXX000.FP000
Spread
Spectrum
Differential
Oscillator
1 to 220
1.8V,
2.5V, 3.3V
±0.25% to ±2%
-0.5% to -4%
5.0 x 3.2
-40 to 85,
-20 to 70
1.8V,
2.5V, 3.3V
7.0 x 5.0
Note:
3. Revision number which is placed right after SiTXXXX in the part number is fixed and not programmable. For instance, SiT8008A cannot be programed to SiT8008B.
便携式数字数据采集系统（PDDAS）使用了LabVIEW实时模块和PXI，以控制风洞测试和采集记录来自128个不同通道的空气压力数据 "通过LabVIEW实时模块，可以在各种操作情况下获得采集空气压力数据及向风洞提供反馈控制信号所需的确定性响应时间。" – Dave Scheibenhoffer, G Systems 挑战: 用一个可采集、分析和存储来自下一代喷气式战斗机引擎设计的动...[详细]
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