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HC49US-FF5F18-12.000 MHZ
Crystal, HC49US Series, 12 MHz, 30 ppm, 30 ppm, 18 pF
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: ILSI AMERICA
- Product type: Crystals
- Available until stocks are exhausted
- SVHC: No SVHC (25-Jun-2025)
- Frequency Nom: 12MHz
- Product Range: HC49US Series
- Load Capacitance: 18pF
- Crystal Frequency: 12MHz
- Crystal Case / Package: Through Hole, 11mm x 4.7mm
- Frequency Stability + / -: 30ppm
- Frequency Tolerance + / -: 30ppm
- Operating Temperature Max: 85°C
- Operating Temperature Min: -40°C
| Delivery and price | |
|---|---|
| Units per pack | 50 |
| Price | 0.432 € |
| Current stock | 50+ |
| Lead time | 30 days |
Datasheet
2 Lead Metal Package Quartz Crystal, 4.7 mm x 11 mm HC49US Series |**Product Features:**|**Applications:**|||||||||||||||||| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| |Low Cost Package|Fibre Channel|||||||||||||||||| |RoHs Compliant|Server & Storage|||||||||||||||||| |Compatible with Leadfree Processing|Sonet /SDH<br>802.11 / Wifi<br>T1/E1, T3/E3|||12 Min.<br>H Max.<br>Ce)|||||||||||||||| |**Frequency**<br>3.2 MHz to 100.000 MHz<br>**ESR (Equivalent Series Resistance)**<br>3.2 MHz – 3.49 MHz<br>3.5 MHz – 3.99 MHz<br>4.0 MHz – 4.99 MHz<br>5.0 MHz – 5.99 MHz<br>6.0 MHz – 6.99 MHz<br>7.0 MHz – 8.9 MHz<br>9.0 MHz – 12.9 MHz<br>13 MHz – 19.9 MHz<br>20 MHz – 36 MHz<br>27 MHz – 100 MHz (3<br>rdO.T.)<br>300ΩMax.<br>200ΩMax.<br>150ΩMax.<br>120ΩMax.<br>100ΩMax.<br>80ΩMax.<br>60ΩMax.<br>40ΩMax.<br>30ΩMax.<br>100ΩMax.<br>**Shunt Capacitance (C0)**<br>7 pF Max.<br>**Frequency Tolerance @ 25**°C<br>±30 ppm Standard (see Part Number Guide for more options)<br>**Frequency Stability over**<br>**Temperature**<br>±50 ppm Standard (see Part Number Guide for more options)<br>**Crystal Cut**<br>AT Cut Standard<br>**Load Capacitance**<br>18 pF Standard (see Part Number Guide for more options)<br>**Drive Level**<br>1 mW Max.<br>**Aging**<br>±5 ppm Max. / Year Standard<br>**Temperature**<br>**Operating**<br>0°C to +70°C Standard (see Part Number Guide for more<br>options)<br>**Storage**<br>-40°C to +85°C Standard<br>~~=~~||||||0.43<br>±0.03<br>4.7 Max.<br>11.1 Max.<br>4.88<br>±0.2<br>HC49US, H Max. = 3.5<br>HC49US2, H Max. = 2.5<br>HC49US3, H Max. = 2.0<br>Dimension Units: mm||||||||||||| |OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl|OO————OE—O——E——O—E———EEEEEEEEOEEEEEEEEOEEOEOEEOEEEEEOEEEEOEEEEOOOOOOOOEO—E—E—E—EeEeeeeeererererrtrrttltl| |**Part Number Guide**|**Sample Part Number:**<br>**HC49US - FB1F18 - 20.000**|||||||||||||||||| |**Package**<br>**Tolerance**|**Stability**<br>**Operating**|**Mode**||**Load Capacitance**|||||||||||**Load Capacitance**||**Frequency**|| |**(ppm) at Room**|**(ppm) over Operating**<br>**Temperature Range**|**(overtone)**||||**(pF)**||||**(pF)**||||||||| |**Temperature**|**Temperature**|||||||||||||||||| |HC49US -<br>(3.5 mm H)<br>B = ±50ppm<br>F = ±30ppm|B = ±50ppm<br>0 = 0°C to +50°C<br>F = ±30ppm<br>1 = 0°C to +70°C|F = Fundamental<br>3 = 3rdovertone||||||||||||||||| |HC49US2 -<br>(2.5 mm H)<br>G = ±25ppm<br>H = ±20ppm|G = ±25ppm<br>2 = -10°C to +60°C<br>H = ±20ppm<br>3 = -20°C to +70°C|||18 pF Standard<br>Or Specify|||||||||||||- 20.000 MHz|| |HC49US3 -<br>I = ±15ppm|I = ±15ppm**<br>5 = -40°C to +85°C|||||||||||||||||| |(2.0 mm H)<br>J = ±10 ppm*|J = ±10 ppm**<br>9 = -10°C to +50°C|||||||||||||||||| * Not available at all frequencies. ** Not available for all temperature ranges. **ILSI America** Phone: 775-851-8880 • Fax: 775-851-8882• e-mail: e-mail@ilsiamerica.com • www.ilsiamerica.com 06/09_A Specifications subject to change without notice Page 1 RoHS ty ## AEST 2 Lead Metal Package Quartz Crystal, 4.7 mm x 11 mm HC49US Series **Pb Free Solder Reflow Profile:** **Typical Circuit:** *Units are backward compatible with 240C reflow processes ## **Package Information:** MSL = 1 Termination = e1 (Sn / Cu / Ag over Ni over Kovar base metal). ## **Environmental Specifications** |ThermalShock|MIL-STD-883,Method1011, Condition A| |---|---| |MoistureResistance|MIL-STD-883,Method1004| |MechanicalShock|MIL-STD-883,Method2002, Condition B| |Mechanical Vibration|MIL-STD-883,Method2007, Condition A| |Resistance to SolderingHeat|J-STD-020C,Table 5-2 Pb-free devices (except2cyclesmax)| |Hazardous Substance|Pb-Free /RoHS / GreenCompliant| |Solderability|JESD22-B102-D Method2(PreconditioningE)| |TerminalStrength|MIL-STD-883,Method2004,Test Condition D| |GrossLeak|MIL-STD-883,Method1014, ConditionC| |FineLeak|MIL-STD-883,Method1014, Condition A2,R1=2x10-8 atmcc/s| |Solvent Resistance|MIL-STD-202,Method 215| ## **Marking** Line 1 ILSI, Frequency, Date Code (yww) **ILSI America** Phone: 775-851-8880 • Fax: 775-851-8882• e-mail: e-mail@ilsiamerica.com • www.ilsiamerica.com 06/09_A Specifications subject to change without notice Page 2
Updated at April 28, 2026
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