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Specifications
Normal temperature Frequency Tolerance:
±10ppm
Frequency Stability:
±30ppm
Operating Temperature:
-40℃~+85℃
Load Capacitance:
20pF
Frequency:
18.432MHz
Mfr. Part #:
7U18432E20UCG
Package:
SMD3225-4P
Key Attributes
Model Number:
7U18432E20UCG
Product Description
Product Overview
The QUARTZ CRYSTAL UNIT SERIES 7U is a seam-sealed ceramic, 3.2*2.5mm surface mount package quartz crystal unit. It is designed for various electronic applications requiring precise frequency control.
Product Attributes
- Brand: SJK
- Origin: Shenzhen, China
- Certifications: RoHS, REACH, HF
- Package: 3.2*2.5mm Surface Mount Ceramic
- Minimum Packaging: 3000pcs/reel
- Moisture Sensitivity Level: Level 1
Technical Specifications
| Parameter | Specification |
| Part Number (P N/ SJK) | 7U18432E20UCG |
| Output Frequency | 18.432000MHz |
| Mode | AT/Fundamental Frequency |
| Frequency Tolerance (@25C) | 10 ppm max |
| Load Capacitance (CL) | 20.0 PF |
| Frequency Stability Over Operating Temperature | 10ppm max / -20 C to +70 C; 30ppm max/ -40 C to +85 C |
| Operating Temperature Range | -40 C to +85 C |
| Storage Temperature Range | -40 C to +125 C |
| Shunt Capacitance (C0) | 3.0 PF Max |
| Driver Level (Typical) | 10W |
| Equivalent Series Resistance (ESR) | 60 Max |
| Aging @25C (1st year Max) | 3ppm/year |
| Testing Conditions | Ambient temperature: 255, Relative humidity: 40%~70% |
| Reflow Condition | Refer to datasheet (not specified in detail) |
| Reliability Test - Drop | Frequency change 5ppm, Resistance change 15% after 3 drops from 55cm |
| Reliability Test - Vibration | Frequency change 5ppm, Resistance change 15% after 2 hours per axis (10~55Hz, 1.5mm amplitude) |
| Reliability Test - Thermal Shock | Frequency change 5ppm, Resistance change 15% after 25 cycles (-40C to +85C) |
| Reliability Test - Hermeticity | Leak rate 110-9Pa.m3/s (He pressure 50.5Kg/cm2 for 120 min) |
| Reliability Test - Resistance to Soldering Heat | Frequency change 5ppm, Resistance change 15% (Peak temp 26010C, 155 sec) |
| Reliability Test - Tinning Test | Pin coverage 90% after immersion (26010C, 31 sec) |
| Reliability Test - High Temp/High Humidity | Frequency change 5ppm, Resistance change 15%; No rust on surface (60C, 90%~95% RH for 240 hours) |
| Reliability Test - High Temperature | Frequency change 5ppm, Resistance change 15% (85C for 240 hours) |
| Reliability Test - Low Temperature | Frequency change 5ppm, Resistance change 15% (-40C for 240 hours) |
| Reliability Test - Life Test | Frequency change 5ppm, Resistance change 15% (5V, 25C for 1000 hours) |
2207271530_SJK-7U18432E20UCG_C557190.pdf
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