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Specifications
Normal temperature Frequency Tolerance:
±20ppm
Frequency Stability:
±20ppm
Operating Temperature:
-20℃~+70℃
Load Capacitance:
20pF
Equivalent Series Resistance(ESR):
250Ω
Frequency:
6.7458MHz
Mfr. Part #:
KMD674582020
Package:
HC-49S-SMD-2P-Mini
Key Attributes
Model Number:
KMD674582020
Product Description
Product Overview
This document outlines the technical specifications for the KMD674582020 Quartz Crystal Resonator, model M-49USSMD, with a nominal frequency of 6.7458MHz. It details product parameters, reliability testing, and packaging information.
Product Attributes
- Brand: Kaiyuexiang ()
- Origin: Shenzhen, China
- Product Type: Quartz Crystal Resonator
- Model: M-49USSMD
- Original Model: KMD674582020
Technical Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Nominal Frequency | 6.7458 | MHz |
| Mode of Oscillation | AT Cut | |
| Frequency Tolerance | ±20 | PPM |
| Temperature Tolerance | ±20 | PPM |
| Operating Temperature Range | -20 to +70 | |
| Storage Temperature | -40 to +85 | |
| Equivalent Resistance | ≤40 | Ω |
| Load Capacitance | 12 | pF |
| Drive Level | 100 | μW |
| Shunt Capacitance | ≤7.0 | pF |
| Insulation Resistance | ≥500 | MΩ at DC 100V±15V |
| Aging | ≤±5 | ppm/year |
| Marking | K6.7458 |
Product Reliability
Electrical Performance
| Test Item | Conditions | Result |
|---|---|---|
| Low-Temperature Resistance | 500 hrs at -40±5, then 1 hr at room temp. | () |
| High-Temperature Resistance | 500 hrs at +100±5, then 1 hr at room temp. | () |
| Salt Mist Test | 48 hrs at 35±2 (5% salt solution), then wash. | () |
| Humidity Test | 500 hrs at 60±2 & 90-98% RH, then 1 hr at room temp. | () |
| Temperature Cycling | 100 cycles (-40±2 for 30 min, +85±2 for 30 min), then 2 hrs at room temp. | () |
Mechanical Performance
| Test Item | Conditions | Result |
|---|---|---|
| Drop Test | 3 drops from 75cm±5cm onto wood board (≥3cm thick), then 1 hr rest. | () |
| Vibration Test | 10-55Hz, 1.5mm amplitude, 2 hrs along X, Y, Z axes, then 1 hr rest. | () |
| Terminal Bending Strength | Fix body, twist 45 degrees, then slowly restore. | () |
| Terminal Strength | On PCB, 0.5mm/s speed, 2mm bend, 5 sec±1 sec pressure. | () |
| Solderability Test | Apply flux (7-10%), then dip in 230±5 solder for 3 sec. | () |
| Hermeticity Test | Immerse in 85±5 water for 5 min (water level approx. 20cm above crystal). | () |
| Solder Heat Resistance | On 265±5 solder bath (2.0±0.2mm from surface) for 3 min (2 times); On 350±10 solder bath (2.0mm±0.2mm from surface) for 3±0.5 sec (2 times), then 2 hrs at room temp. | () |
Judgment Standards
| Result Code | Specification Requirement |
|---|---|
| () | Frequency Change: ±5ppm; Resistance Change: ±20%Ω |
| () | No lead breakage and meets () requirements. |
| () | Tin coverage rate > 90%. |
| () | No bubbles on crystal surface or emerging from water. |
| () | Product appearance is qualified. |
Packaging and Appearance
Packaging: 1 tray per box (3000PCS), 5 boxes per outer carton (15000PCS).
2106021034_KYX-KMD674582020_C2835947.pdf
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