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MHz Crystal
Classification:
Specification:
- Product Description
- Selection Reference
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- Commodity name: MHz Crystal
Crystal oscillator is the abbreviation of crystal oscillator, written in English as oscillator, also known as active crystal oscillator. Corresponding to it is the crystal resonator, which is called Crystal Units in English, or crystal for short (some people also call it passive crystal oscillator). Currently, crystal oscillators based on quartz wafers are widely used in the market.
MHz crystal
1. What is the use of the 32.768KHz crystal ? Use the simplest information points to explain complex and boring engineering knowledge (or principles) clearly! Make readers happy to read, easy to accept and "understand", this is the best science popularization!
Original video link: https://mp.weixin.qq.com/s/7lQHdo72r8Xe7SLTVHhbXg
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MCU bosses, which crystal oscillators did you choose? When doing the original design of the following MCUs, the following crystal oscillators were selected. (Limited level, for reference only.) MCU brand MCU model Crystal brand category Crystal oscillator model Crystal frequency 
EM351
EM357EPSON kHz Crystal FC-135 32.768kHz EPSON EPSON MHz Crystal TSX-3225 24MHz Si534x series
Si538x seriesEPSON TCXO TG-5500CA-67N 40MHz EPSON TG-5500CA-68N 49.152MHz EPSON TG-5500CA-08N 12.8MHz EPSON TG-5500CA-08N 12.8MHz Si4438 or Si4463 EPSON MHz Crystal TSX-3225 30MHz 
RX200 Series EPSON kHz Crystal MC-146 32.768kHz EPSON MC-146L 32.768kHz RX600 Series
RX700 SeriesEPSON kHz Crystal MC-146 32.768kHz EPSON MC-146L 32.768kHz RL78/G1D module: RY7011 EPSON kHz Crystal FC-12M 32.768kHz 
M480 EPSON kHz Crystal FC-13A 32.768kHz EPSON MHz Crystal FA-238A 16MHz EPSON 24MHz
(Former IDT)
82P337xx
* Stratum3 Compliant products
** G.813/G.8262 option1/option2 Compliant products
* Stratum3 Compliant products
** G.813/G.8262 option1/option2 Compliant productsEPSON TCXO TG-5500CA-08N 12.8MHz EPSON TCXO TG-5032CGN
25.000000MHz
CAGHNA25MHz 82P338xx
82P339xx
* G.813/G.8262 option1/option2 Compliant products
** G.8273.2 Compliant productsEPSON TCXO TG-5500CA-08N 12.8MHz EPSON TCXO TG-5032CGN 25MHz 82P33x31
82P33741
8V89308I
* G.8262 Nx10G jitter Compliant productsEPSON MHz Crystal TSX-3225 25MHz 8V19N480 *
8V19N490 *
8V18N472 *
* JESD204B compliantEPSON VCXO VG5032EFN
CJGHBA125MHz EPSON VG7050EFN
CJGHBAAPR+/-50ppm 8V19N474 *
8V18N478 *
* JESD204B compliantEPSON VCXO VG5032EFN
CJGHBA156.25MHz EPSON VG7050EFN
CJGHBA8V19N88x series EPSON VCXO VG3225EFN
122.880MHz
CJHHBAAPR+/-50ppm EPSON VG3225EFN
122.880MHz
CJGHSAAPR+/-10ppm EPSON VG3225EFN
245.760MHz
CJHHMAAPR+/-20ppm There are also domestic brands for MCU, such as Fudan Micro, Huada Electronics, Xiaohua Semiconductor, GD GigaDevice, Zhongying, Hangshun, etc. Whether these brands chose a certain brand when making original designs remains to be further confirmed. . If you have a good channel to obtain this information, please contact: 13816691297 (same WeChat number);
"Chip + crystal " is the future development direction.
Have you ever encountered such trouble in crystal circuits?
1. The crystal circuit is designed according to IC recommendations, but there is a large deviation in frequency, or the entire crystal circuit cannot work.
2. During mass production, it was discovered that there was a problem with the crystal circuit. Either the frequency was wrong or it could not vibrate. You ask the supplier and they say: There is nothing wrong with the crystal itself.
In fact, many of the above are caused by the lack of good matching at the beginning of the crystal circuit design. This is a very time-consuming design, but you don’t have to worry now. We have always provided such services to help customers with loop matching of passive crystals and help you adjust frequency, drive power and oscillation capability. The original manufacturer must solve these problems during the design stage.
We can evaluate your crystal circuit on your PCB board and recommend suitable values, (e.g., Cg, Cd, Rf, Rd)
You only need to provide the following information:
1. Circuit boards that can work continuously
2. Schematic diagram and PCB diagram of the crystal part
3. Power supply method
4. Currently used crystal information
Staff are conducting CE testing, as above
Standard crystal circuit schematic diagram
RD-current limiting resistor丨Rf-reverse resistor丨X-quartz crystal
CG-frequency adjustment capacitor, gate terminal丨CD-frequency adjustment capacitor, drain terminal
Epson Shanghai Laboratory
What our standard tests include
Frequency deviation
DL: Drive level
|-R|: Negative resistance
Proposal format (example)
Advantages of EPSON CE testing
*Epson will recommend the most suitable circuit matching and the most suitable crystal to help you solve problems such as insufficient crystal circuit accuracy and no vibration.
*Our CE test is more reasonable and efficient, because what we recommend is not only the frequency adjustment, but also the driving power and circuit oscillation ability.
*Epson's service is completely free, which saves you time and design costs.
The precautions for using in-line crystals are as follows:
Key words:
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Shanghai Tang Electronics Co.,Ltd.
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Switchboard: 021-57153998
Sales Line: 021-57155055 ; 57153995 ; 57153855
Web: www.tang-sh.com
Add: Chunhua Building, Building 23, No. 18 Huancheng East Road, Fengxian District, Shanghai, China