Product Overview
The 2NM Series Si MEMS Oscillators are designed for surface mount applications, featuring an epoxy molding and a compact 2.5x2.0mm package. These oscillators offer a nominal frequency of 74.250MHz and operate within a voltage range of 1.8V to 3.3V, with a temperature range of -40 to 85. They utilize LVCMOS output and are built with AT CUT crystal technology. The series is compliant with RoHS, REACH, and HF environmental standards.
Product Attributes
- Brand: SJK ()
- Series: 2NM Si MEMS Oscillator
- Packaging: Epoxy Molding, Surface Mount
- Package Size: 2.5x2.0mm
- Crystal Cutting Type: AT CUT (thickness shear mode)
- Environmental Compliance: RoHS, REACH, HF
- Moisture Sensitivity Level: Level 1
- Minimum Packaging: 3000pcs/reel
Technical Specifications
| Parameter | Symbol | Min | Type | Max | Units | Notes |
|---|---|---|---|---|---|---|
| Nominal Frequency | 74.250000 | MHz | ||||
| Frequency Stability at 25 | 10 | PPM | ||||
| Frequency Stability Over Operating Temperature Range | 15 | PPM | ||||
| Operating Temperature | Topr | -40 | 25 | 85 | ||
| Storage Temperature | Tstg | -55 | 125 | |||
| Supply Voltage | VDD | 1.62 | 3.3 | 3.63 | V | 10% |
| Input Current | Icc | 10 | mA | |||
| Enable Control | Yes | Pad 1 | ||||
| Output Load: CMOS | CL | 15 | pF | |||
| Output Voltage High | VoH | 90% | Vdd | |||
| Output Voltage Low | VoL | 10% | Vdd | |||
| Rise Time | Tr | 5 | ns | 10%90%VDD Level | ||
| Fall Time | Tf | 5 | ns | 90%10%VDD Level | ||
| Symmetry (Duty ratio) | TH/T | 45 | 55 | % | ||
| Start-up Time | Tosc | 10 | ms | |||
| Enable Voltage High | Vhi | 70% | Vdd | |||
| Disable Voltage Low | Vlo | 30% | Vdd | |||
| Aging | 3 | ppm/yr. | 1st. Year at 25 | |||
| Output Disable Delay Time | T off | 150 | us | |||
| Output Enable Delay Time | T on | 150 | us | |||
| Phase Jitter (12KHz~20MHz) | 0.5 | 1.0 | ps |
Dimensions
Units: mm
(Dimensional drawing not provided in source text)
Marking
(Marking details not provided in source text)
Test Circuit & Waveform Conditions
Test Circuit: Control input (output enable/disable) Logic 1 or open on pad 1: Oscillator output. Logic 0 on pad 1: Disable output to high impedance.
Waveform Conditions: Waveform measurement system should have a minimum bandwidth of 5 times the frequency being tested.
Output Enable/Disable Delay
Timing during normal operation. When the device is in standby, the oscillator stops. When standby is released, the oscillator starts and stable oscillator output occurs after a short delay.
Suggested Reflow Profile
Total time: 200 sec. Max / Solder melting point: 220
Reliability Test Specifications
1. Mechanical Endurance
| No. | Test Item | Test Methods REF. DOC |
|---|---|---|
| 1 | Drop Test | 75 cm height, 3 times on concrete floor. JIS C6701 |
| 2 | Mechanical Shock | Device shocked to half sine wave (1000 G) three mutually perpendicular axes each 3 times. 0.5m sec. duration time. MIL-STD-202F |
| 3 | Vibration | Frequency range 10 ~ 2000 Hz, Amplitude 1.52 mm/20G. Sweep time 20 minutes. Perpendicular axes each test time 4 Hrs (Total test time 12 Hrs). MIL-STD-883E |
| 4 | Gross Leak | Standard Sample For Automatic Gross Leak Detector, Test Pressure: 2kg / cm2. MIL-STD-883E |
| 5 | Fine Leak | Helium Bombing 4.5 kgf / cm 2 for 2 Hrs. |
| 6 | Solderability | Temperature 245 5, Immersing depth 0.5 mm minimum, Immersion time 5 1 seconds. Flux Rosin resin methyl alcohol solvent (1:4). MIL-STD-883E |
2. Environmental Endurance
| No. | Test Item | Test Methods REF. DOC |
|---|---|---|
| 1 | Resistance To Soldering Heat | Pre-heat temperature 125 , Pre-heat time 60 ~ 120 sec. Test temperature 260 5 , Test time 10 1 sec. MIL-STD-202F |
| 2 | High Temp. Storage | +125 3 for 1000 12Hrs. MIL-STD-883E |
| 3 | Low Temp. Storage | -40 3 for 1000 12Hrs. |
| 4 | Thermal Shock | Total 100 cycles of the following temperature cycle. MIL-STD-883E |
| 5 | Pressure Cooker Storage | 121 3, RH100%, 2 bar, 240Hrs. JIS C6701 |
| 6 | High Temp & Humidity | 85 3, RH 85%, 1000 Hrs. JIS C5023 |
2304131800_SJK-2NM74250C33YC_C668775.pdf
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