Qualified Parts List Crystals
Quantic Croven has been an approved supplier of Qualified Parts List (QPL) crystals for more than fifty years. Qualified to MIL-PRF-3098 standards, we maintain an extensive array of approvals for crystals from 2.4 to 125 MHz. Our crystals are ideally suited for military, avionics, and space applications where reliability is paramount. Crystals ordered and marked in accordance with MIL-PRF-3098 have been fully qualified through Group B testing and are supplied with 100% screening and Group A inspection per the below table.
| CR Type (Datasheet) | Slash Sheet | Holder | Frequency Range (MHz) | Mode of Oscillation | Frequency-Temperature Stability | Specified Load (pF) |
|---|---|---|---|---|---|---|
| CR55/U | MIL-PRF-3098/33 | HC-43 | 17 – 62 | 3rd | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR56/U | MIL-PRF-3098/34 | HC-43 | 50 – 125 | 5th | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR59/U | MIL-PRF-3098/37 | HC-43 | 50 – 125 | 5th | ± 20 ppm from +80 to +90 °C total tolerance | Series |
| CR60/U | MIL-PRF-3098/38 | HC-43 | 5 – 20 | Fund | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR61/U | MIL-PRF-3098/39 | HC-43 | 17-61 | 3rd | ± 20 ppm from +80 to +90 °C total tolerance | Series |
| CR64/U | MIL-PRF-3098/42 | HC-43 | 2.4 – 20 | Fund | ± 50 ppm from -55 to +105 °C total tolerance | 30 |
| CR67/U | MIL-PRF-3098/45 | HC-43 | 17 – 62 | 3rd | ± 25 ppm from -55 to +105 °C total tolerance | Series |
| CR69/U | MIL-PRF-3098/47 | HC-43 | 2.9 – 25 | Fund | ± 20 ppm from -40 to +90 °C total tolerance | 30 |
| CR72/U | MIL-PRF-3098/50 | HC-43 | 17 – 61 | 3rd | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR76/U | MIL-PRF-3098/53 | HC-43 | 16 – 61 | 3rd | ± 20 ppm from -40 to +90 °C total tolerance | Series |
| CR80/U | MIL-PRF-3098/57 | HC-43 | 50 – 125 | 5th | ± 20 ppm from -40 to +90 °C total tolerance | Series |
| CR81/U | MIL-PRF-3098/58 | HC-42 | 17 – 65 | 3rd | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR82/U | MIL-PRF-3098/59 | HC-42 | 50 – 125 | 5th | ± 50 ppm from -55 to +105 °C total tolerance | Series |
| CR83/U | MIL-PRF-3098/60 | HC-42 | 50 – 125 | 5th | ± 20 ppm from -40 to +90 °C total tolerance | Series |
| CR84/U | MIL-PRF-3098/61 | HC-42 | 17-61 | 3rd | ± 20 ppm from +80 to +90 °C total tolerance | Series |
| CR97/U | MIL-PRF-3098/72 | HC-43 | 8 – 10 | Fund | ± 50 ppm from -40 to +85 °C total tolerance | Series |
| CR101/U | MIL-PRF-3098/103 | HC-35 | 7 – 20 | Fund | ± 50 ppm from -55 to +105 °C total tolerance | 30 |
| CR102/U | MIL-PRF-3098/104 | HC-35 | 50 – 125 | 5th | ± 25 ppm from -55 to +105 °C total tolerance | Series |
| CR103/U | MIL-PRF-3098/105 | HC-35 | 17 – 61 | 3rd | ± 25 ppm from -55 to +105 °C total tolerance | Series |
| CR106/U | MIL-PRF-3098/82 | HC-43 | 10.5 – 11.5 | Fund | ± 50 ppm from -55 to +105 °C total tolerance | 32 |
| CR117/U | MIL-PRF-3098/93 | HC-42 | 30 – 63 | 3rd | ± 15 ppm from -40 to +65 °C total tolerance | Series |
| CR139/U | MIL-PRF-3098/118 | HC-43 | 20 – 22 | Fund | ± 50 ppm from -55 to +105 °C total tolerance | 30 |
| CR141/U | MIL-PRF-3098/122 | HC-42 | 48 – 90 | 5th | ± 25 ppm from -30 to +55 °C total tolerance | Series |
Group A Inspection – Product B Level Crystals
| Inspection | Subgroup | Requirement Paragraph | Method Paragraph |
|---|---|---|---|
| Visual and mechanical inspection (external)* | I | 3.5, 3.6, 3.35 | 4.10.2.2 |
| Low temperature storage | I | 3.22.3 | 4.10.18.4 |
| Reduced drive level** | I | 3.18 | 4.10.17 |
| Frequency and resistance | I | 3.22 | 4.10.18 |
| Frequency stability (controlled) | I | 3.22.1 | 4.10.18.3 |
| Operable temperature range (controlled) | I | 3.22.2 | 4.10.18.3 |
| Capacitance Shunt (when specified) | I | 3.11.1 | 4.10.7.1 |
| Unwanted modes | I | 3.13 | 4.10.9 |
| Seal | I | 3.24 | 4.10.26 |
| Accelerated aging | II | 3.29.1 | 4.10.27.2 |
** Applicable to overtone units and, when specified, fundamental units.
Group B Inspection – Product B Level Crystals
| Inspection | Subgroup | Requirement Paragraph | Method Paragraph |
|---|---|---|---|
| Solderability | I* | 3.7 | 4.10.3 |
| Resistance to solvents (4 sample units) | I* | 3.8 | 4.10.4 |
| Shock (specified pulse) | I* | 3.17 | 4.10.13 |
| Vibration | I* | 3.19.1 | 4.10.14.1 |
| Thermal shock | I* | 3.23 | 4.10.19.1 |
| Seal | I* | 3.24 | 4.10.26 |
| Salt atmosphere (corrosion) | I* | 3.27 | 4.10.21 |
| Moisture resistance | I* | 3.28 | 4.10.22 |
| Terminal strength** | I* | 3.30 | 4.10.23 |
| Visual and mechanical examination (internal) ** | I* | 3.5, 3.6, 3.35 | 4.10.2.2 |
| Bond strength (when specified) ** | I* | 3.31 | 4.10.24 |
| Insulation resistance | II*** | 3.14 | 4.10.10 |
| Aging | II*** | 3.29 | 4.10.27.1 |
** Only two units are required. These two sample units shall be subjected to terminal strength, visual and mechanical (internal), and bond strength (when specified see 3.1).
*** Testing period of 6 months (see 4.9.2) Tests eligible for reduced reporting frequency after 6 consecutive periods (see 4.7.5).