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Specifications
Normal temperature Frequency Tolerance:
±10ppm
Frequency Stability:
±20ppm
Operating Temperature:
-20℃~+70℃
Load Capacitance:
18pF
Equivalent Series Resistance(ESR):
40Ω
Frequency:
21.25MHz
Mfr. Part #:
KMD212501810
Package:
HC-49S-SMD-Mini
Key Attributes
Model Number:
KMD212501810
Product Description
Product Overview
This document specifies the Quartz Crystal Resonator, model M-49USSMD /21.250MHz, manufactured by Shenzhen Kaiyuexiang Electronics Co., Ltd. It is designed for applications requiring precise frequency control.
Product Attributes
- Brand: KYX
- Origin: Shenzhen, China
- Product Name: Quartz Crystal Resonator
- Product Model: M-49USSMD /21.250MHz
- Customer Confirmation Seal: [Space for Seal]
- Certification Seal: [Space for Seal]
- Approver: Xie Weiliang
- Prepared by: Dong Zongquan
Technical Specifications
| Parameter | Specification | Unit |
| Nominal Frequency | 21.250 | MHz |
| Mode of Oscillation | AT Cut | |
| Frequency Tolerance | 10 | PPM |
| Temperature Tolerance | 20 | PPM |
| Operating Temperature Range | -20 to +70 | |
| Storage Temperature | -40 to +85 | |
| Equivalent Resistance | 60 | |
| Load Capacitance | 18 | pF |
| Drive Level | 100 | W |
| Shunt Capacitance | 3.0 | pF |
| Insulation Resistance | 500 | M at DC 100V15V |
| Aging | 3 | ppm/year |
| Hold Type | M-49USSMD | |
| Marking | KYX XX |
Product Reliability
| Category | Item | Conditions | Result |
| Electrical Performance | Low Temperature Resistance | 500 hours at -405, then 1 hour natural cooling | () |
| High Temperature Resistance | 500 hours at +1005, then 1 hour natural cooling | () | |
| Salt Spray Test | 48 hours in 352 salt water (5% concentration), then rinse | () | |
| Humidity Test | 500 hours at 602 and 90-98% RH, then 1 hour natural cooling | () | |
| Temperature Cycling | 100 cycles: 30 min at -402, 30 min at +852, then 2 hours natural cooling | () | |
| Mechanical Performance | Drop Test | 3 drops from 75cm5cm onto a wooden board (thickness >3cm), test after 1 hour | () |
| Vibration Test | 10-55Hz, 1.5mm amplitude, 2 hours along X, Y, Z axes, test after 1 hour | () | |
| Terminal Bending Strength Test | Fix body, twist 45 degrees, then slowly restore | () | |
| Terminal Strength | Apply pressure with 0.5mm/s speed, 2mm bending, 5s1s duration after mounting on PCB | () | |
| Solderability Test | Apply flux (7-10% concentration) for ~5s, then dip in 2305 solder pot for 3s | () | |
| Sealing Test | Immerse in 855 warm water for 5 minutes (water level ~20cm above crystal) | () | |
| Solder Heat Resistance | 3 minutes in 2655 tin pot (2.00.2mm from tin surface) (2 times); 30.5 seconds in 35010 tin pot (2.00.2mm from tin surface) (2 times), then 2 hours natural cooling | () |
Judgment Criteria
| Result Code | Specification Requirements |
| () | Frequency change: 5ppm; Resistance change: 20% |
| () | No lead breakage and meets () requirements |
| () | Tin coverage rate >90% |
| () | No bubbles on crystal surface or emerging from water surface |
| () | Product appearance is qualified |
Packaging Information
1 tray per box (3000 PCS), 10 boxes per outer carton (30000 PCS).
2310121803_KYX-KMD212501810_C18213396.pdf
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