SJK: High-precision oscillators & filters for global tech industries.
sjk@q-crystal.com+86 755 8835 2869
7D Series UM-5 Crystal Filter
21.7MHz~45M / Package: UM-5 /UM-5MJ
• UM-5 through tole package, UM-5MJ SMD package
• Low insertion loss
• High selectivity
• Good inter-modulation and high stability over a wide temperature range
• Excellent guaranteed attenuation
• Application for VHF & UHF radio, Wireless telemetry, Pagers, Wireless LAN, Radio communications, Communications, etc.
• RoHS Compliant /Pb Free
• UM-5 through tole package, UM-5MJ SMD package
• Low insertion loss
• High selectivity
• Good inter-modulation and high stability over a wide temperature range
• Excellent guaranteed attenuation
• Application for VHF & UHF radio, Wireless telemetry, Pagers, Wireless LAN, Radio communications, Communications, etc.
• RoHS Compliant /Pb Free
5.0
design customization
Please fill out the form below to request a quote or to request more information about us. Please be sure to upload customized requirement documents or pictures, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Key Features
Dual package options: UM-5 through-hole and UM-5MJ SMD package, flexible for different PCB design demands Wide frequency range: 21.7MHz ~ 45MHz, available with various channel spacing and pole configurations Ultra-low insertion loss ranging from 1.5dB to 4.0dB, minimizing signal attenuation during transmission Excellent frequency selectivity and steep stopband characteristics for effective clutter signal suppression Superior inter-modulation performance and outstanding temperature stability for long-term operation in diverse environments High guaranteed attenuation up to 90dB, delivering reliable signal filtering capability Multiple specifications on pass bandwidth, stop bandwidth and terminating impedance for customized matching Various pole designs (2/4/6/8 poles) and tandem set combinations to meet different filtering requirements Standard pin definition, easy for assembly and circuit integration RoHS compliant and lead-free, conforming to global environmental protection standardsStandard Specifications
| Channel Spacing (KHz) |
Model | No. of Pole | Pass Bandwidth | Stop Bandwidth | Ripple | Insertion Loss | Guaranteed Attenuation | Terminating Impedance | Package | ||||
| dB | kHz(min.) | dB | kHz(max.) | dB(max.) | dB(max.) | dB | KHz | ohms // pF | Tandem Set | One Package | |||
| 12.5 | 21M7.5A | 2 | 3 | ±3.75 | 20 | ±18 | 0.5 | 1.5 | 35 | ±300~±1000 | 850 // 6.0 | UM-5 | |
| 21M7.5B | 4 | 3 | ±3.75 | 40 | ±15 | 1.0 | 2.5 | 65 | ±300~±1000 | 850 // 5.0 | UM-5 a pair | ||
| 21M7.5C | 6 | 3 | ±3.75 | 45 | ±8.75 | 2.0 | 3.0 | 65 | ±12.5~±300 | 850 // 5.0 | UM-5 3 pcs | S1 | |
| 21M7.5D | 8 | 3 | ±3.75 | 65 | ±8.75 | 2.0 | 4.0 | 90 | ±12.5~±300 | 850 // 5.0 | UM-5 4 pcs | S2 | |
| 20.0 | 21M12A | 2 | 3 | ±6.0 | 20 | ±25 | 0.5 | 1.5 | 35 | ±300~±1000 | 1.2K // 3.0 | UM-5 | |
| 21M12B | 4 | 3 | ±6.0 | 40 | ±20 | 1.0 | 2.5 | 65 | ±300~±1000 | 1.2K // 2.5 | UM-5 a pair | ||
| 21M12C | 6 | 3 | ±6.0 | 45 | ±15 | 2.0 | 3.0 | 65 | ±20~±300 | 1.2K // 2.5 | UM-5 3 pcs | S1 | |
| 21M12D | 8 | 3 | ±6.0 | 65 | ±15 | 2.0 | 4.0 | 90 | ±20~±300 | 1.2K // 2.5 | UM-5 4 pcs | S2 | |
| 25.0 | 21M15A | 2 | 3 | ±7.5 | 18 | ±25 | 0.5 | 1.5 | 35 | ±300~±1000 | 1.5K // 2.0 | UM-5 | |
| 21M15B | 4 | 3 | ±7.5 | 40 | ±25 | 1.0 | 2.5 | 55 | ±300~±1000 | 1.5K // 2.0 | UM-5 a pair | ||
| 21M15C | 6 | 3 | ±7.5 | 45 | ±18 | 2.0 | 3.0 | 65 | ±25~±300 | 1.5K // 2.0 | UM-5 3 pcs | S1 | |
| 21M15D | 8 | 3 | ±7.5 | 65 | ±18 | 2.0 | 4.0 | 90 | ±25~±300 | 1.5K // 2.0 | UM-5 4 pcs | S2 | |
| 50.0 | 21M30A | 2 | 3 | ±15 | 15 | ±45 | 0.5 | 1.5 | 30 | ±300~±1000 | 1.5K // 1.0 | UM-5 | |
| 21M30B | 4 | 3 | ±15 | 40 | ±50 | 1.0 | 2.5 | 30 | ±300~±1000 | 2.2K // 0.5 | UM-5 a pair | ||
| 21M30C | 6 | 3 | ±15 | 45 | ±35 | 2.0 | 3.0 | 60 | ±45~±300 | 2.2K // 0.5 | UM-5 3 pcs | S1 | |
| 21M30D | 8 | 3 | ±15 | 65 | ±35 | 2.0 | 3.5 | 90 | ±50~±300 | 2.2K // 0.5 | UM-5 4 pcs | S2 | |
| 12.5 | 45M7.5A | 2 | 3 | ±3.75 | 10 | ±12.5 | 1.0 | 2.0 | 65 | ±300~±1000 | 200 // 4.0 | UM-5 | |
| 45M7.5B | 4 | 3 | ±3.75 | 30 | ±12.5 | 1.0 | 4.0 | 80 | ±300~±1000 | 350 // 6.5 | UM-5 a pair | ||
| 25.0 | 45M15A | 2 | 3 | ±7.5 | 15 | ±25 | 1.0 | 2.0 | 35 | ±300~±1000 | 650 // 3.0 | UM-5 | |
| 45M15B | 4 | 3 | ±7.5 | 30 | ±25 | 1.0 | 3.0 | 80 | ±300~±300 | 650 // 3.0 | UM-5 a pair | ||
| 50.0 | 45M30A | 2 | 3 | ±15 | 15 | ±60 | 1.0 | 2.5 | 35 | ±300~±1000 | 1.2K // 0 | UM-5 | |
| 45M30B | 4 | 3 | ±15 | 30 | ±50 | 1.0 | 3.0 | 80 | ±300~±1000 | 1.2K // 0.7 | UM-5 a pair | ||
| Note: More frequencies, more information, please contact with our sales department directly | |||||||||||||
Application scenarios
General Communication Devices
Pagers
RF & IF Signal Processing Modules
VHF & UHF Radio
Wireless LAN
Wireless Telemetry
Wireless Transceiver Equipment
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Founded in 1989, SJK specializes in the manufacturing of crystal resonators and oscillators. With extensive experience in miniaturization, high precision, and low power consumption, our components are widely used across multiple industries.
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Contact Us
Tel: +86 755 8835 2869
Email: sjk@q-crystal.com
Add: 12/F, Building 3C, TianAn Cloud Park Phase 1, Bantian, Longgang District, Shenzhen, 518129, China