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WQC-TF7015 is a thin industrial-grade 32.768khz passive crystal (crystal resonator), which is the main model in WEET SMD tuning fork crystal sales. With a small size and series resistance, the crystal has stable and reliable performance and is suitable for various small electronic devices with high quality requirements.
https://www.weetcap.com/Crystals-Oscillators/WEET-WQC-TF7015-32.768KHz-SMD-Tuning-Fork-Crystal.html
Compared with other series of WEET SMD crystals, the biggest feature of WQC-TF7015 is its ultra-thinness, with a thickness of only 1.4mm.
WQC-TF7015 quartz crystal resonator. 32.768K clock crystal is a small, thin, and light-weight surface tuning fork crystal resonator. The product has excellent heat resistance and environmental resistance, can give full play to the excellent electrical characteristics of the crystal, complies with RoHS regulations, and meets the high-temperature reflow temperature curve requirements of Pb-free soldering. The metal shell packaging enables the product to exert better impact resistance than the ceramic resonator shell when encapsulating.
When selecting the chip of the quartz crystal, attention should be paid to the temperature range and the frequency difference requirements within the crystal temperature range. When the temperature range of the chip crystal is wide (-40℃-85℃), the crystal cutting angle should be slightly higher than the narrow temperature (-10℃-70℃) cutting angle.
The installation and welding of the crystal resonator requires special attention. If the operation is improper, it will cause damage to the crystal; in severe cases, it will directly stop oscillating; more troublesome is that it will cause soft damage, and the crystal can still work normally, but the hidden danger is buried in it, and it will suddenly stop oscillating during subsequent operation. Welding can be divided into manual and machine welding, and machine welding can be divided into wave soldering and reflow soldering. WEET leaded crystal welding can use wave soldering and manual soldering, and WEET SMD crystal uses reflow soldering or a small amount of manual soldering.
32.768KHZ is also called a Real-Time Clock crystal, and RTC is also the manifestation of a 32.768KHZ real-time clock. Its function is to generate a timing circuit reference signal, including all real-time clock crystal RTC, which are generally 32.768 or its multiples. 32.768KHZ crystals are divided into direct plug-in and patch. The 32.768KHZ direct plug-in crystal has only 2 pins, both of which are functional pins, and there is no ground pin; the 32.768KHZ patch crystal depends on how many pins there are. If there are only two pins, it is the same as the direct plug-in. If there are 4 pins, determine which two functional pins are on the homepage, and the other two pins can be grounded or left floating. If it is an active crystal, the four pins are SPXO, TCXO, VC-TCXO, and VCXO, then one of their pin definitions is GND, and it is OK to directly connect to the ground.
If the crystal does not oscillate, you can try to arrange and combine the following aspects to find the links that are prone to problems. Combined with your own problem points, it is easier to find the reason for the non-oscillation.
https://www.weetcap.com/Crystals-Oscillators/WEET-WQC-TF3215-32.768KHz-SMD-Tuning-Fork-Crystal.html
1. Crystal excitation power
We all know that the crystal is a passive component, which mainly requires a certain excitation power provided by the IC to work normally. Therefore, this excitation power is an important part of the branch factory. If the excitation power is too low, the crystal will not easily generate a signal, and it will not be easy to oscillate. However, if the excitation power is too high, it will form over-excitation, which will easily cause damage to the quartz chip, resulting in the phenomenon of stopping oscillation. To solve the problem of crystal not oscillating, at least the following three factors must be tested: oscillation frequency (frequency matching), oscillation margin (negative impedance) and excitation power.
2. Brand and load capacitance of crystal
Load capacitance is very important. Load capacitance refers to the sum of all effective capacitances inside and outside the two leads of the crystal connected to the IC block. WEET brand is a reliable and trustful supplier, popular 32.768KHZ crystals: WQC-TF206,WQC-TF308,WQC-TF1610,WQC-TF2012,WQC-TF3215,WQC-TF7015,WQC-TF2060,WQC-TF3080,WQC-TF7015
3. Grounding method of crystal pin
The shell of the crystal is metal. When packaging, the pad can be made into a mechanical pad and left hanging. The iron wire is fixed to the top of the Vanke and then grounded (grounding is mainly to avoid electromagnetic interference of the circuit, because some circuits are not reasonable during wiring, which can easily cause electromagnetic interference and cause problems with the crystal)
4. Reduce the heating time when the crystal is welded
Check whether the welding temperature of the crystal is high, causing secondary damage to the crystal, and do not exceed the required welding temperature.
5. Use active crystal oscillator
Active crystal oscillators are all built-in circuits, so there is no circuit matching problem, which greatly avoids the occurrence of crystal oscillator non-oscillation problems.
WEET popular series:
WQS-OSC3225,WQS-OSC5032,WQS-OSC7050,WQS-3Z3225,WQS-5Z5032,WQS-7Z7050
With the popularization of 5G technology, the rapid development of the Internet of Things, and the continuous innovation of electronic devices, the demand for high-performance, miniaturized, and low-power crystal resonators will continue to grow.
WQC-TF2012 has broad development prospects in the future market with its excellent performance and characteristics. It is expected that in the future, these crystal resonators will continue to be optimized and upgraded to meet more complex and diverse application requirements. At the same time, with the advancement of manufacturing processes and the reduction of costs, they will be widely used in more fields, promoting the further development of electronic technology.
https://www.weetcap.com/Crystals-Oscillators/WEET-WQC-TF2012-32.768KHz-SMD-Tuning-Fork-Crystal.html
Application Fields
1. Internet of Things Devices
In fields such as smart agriculture and industrial Internet of Things, WQC-TF2012 provides precise frequency references for various sensors and in a wide range of applications in the Internet of Things, including smart homes and control modules. For example, in smart door locks and environmental monitoring equipment in smart homes, stable frequencies ensure accurate data transmission and timely response of equipment.
2. Consumer electronics
In consumer electronics such as mobile phones, tablets, and wearable devices, they provide reliable clock signals for the system, ensuring smooth operation of the device and a good user experience. For example, in Bluetooth headsets, precise frequency control ensures stable audio transmission and improves the sound quality.
3. Automotive electronic systems
Many electronic systems in cars, such as engine control units, airbag systems, and in-car entertainment systems, rely on stable frequency sources. The high reliability and stability of these crystal resonators can meet the working requirements of automotive electronics in harsh environments and ensure the safety and performance of vehicles.
4. Medical equipment
In the medical field, such as blood glucose meters, blood pressure monitors, and electrocardiogram equipment, precise frequency control is essential for accurate measurement and diagnosis. The DST series of crystal resonators provides a strong guarantee for the accuracy and reliability of medical equipment.
1. Communication equipment: In communication equipment, S1M is commonly used to protect signal lines and data lines from damage caused by voltage spikes.
2. Automotive electronics: In key electronic systems such as automotive electronic control units (ECUs) and sensors, US1A can effectively prevent voltage spikes from affecting the system.
3. Power inverter: S1M is commonly used as a rectifier to convert AC power to DC power and provide stable output voltage.
4. LED lighting: In LED driving circuits, S1M can protect LED beads from voltage spikes and surges, extending their service life.
5. Industrial applications: In automated machinery and industrial control systems, S1M can protect equipment from surges and other power interference.
https://www.weetcap.com/Diodes-Rectifiers/WEET_SMA_S1A_THRU_S1Y.html
Typical Application of WEET SMAJ5.0CA:
1. Communication equipment protection: SMAJ5.0CA can be used to protect sensitive circuits in communication equipment, such as radio frequency (RF) receivers and transmitters, to prevent damage caused by high voltage.
2. Computer interface protection: In computer interfaces such as USB, HDMI, and Ethernet ports, SMAJ5.0CA can resist voltage spikes that may be introduced by external power and data lines, protecting the stability of data transmission and device security.
3. Consumer electronics: In smartphones, tablets, and other portable devices, using SMAJ5.0CA can avoid the impact of voltage anomalies caused by fast charging on internal microcircuits.
4. Industrial applications: SMAJ5.0CA is widely used in control systems and sensor devices in industrial environments to protect these devices from voltage fluctuations and interference generated during device startup and shutdown.
5. Automotive Electronics: In automotive electronic systems such as engine control units (ECUs), entertainment systems, etc., SMAJ5.0CA can prevent transient voltages caused by unstable vehicle power systems and improve the overall reliability of electronic systems.
Main Parameter characteristics of WEET SMAJ5.0CA:
1. Voltage protection level: SMAJ5.0CA is designed to provide protection at 5V operating voltage and is an ideal choice for low voltage applications.
2. Fast response time: The TVS diode of this model can respond to voltage spikes in a very short time, quickly limiting the voltage that exceeds the safe threshold below the safe level.
3. High energy absorption capacity: SMAJ5.0CA can absorb up to 400 watts of peak pulse power, effectively protecting the circuit from transient overvoltage damage.
4. Low leakage current: Under normal operating voltage, the leakage current of SMAJ5.0CA is very low, ensuring that it will not cause additional power consumption and heat loss to the circuit.
5. Packaging type: SMA packaging is used, which makes SMAJ5.0CA not only small in size, but also easy to install on the board, suitable for compact circuit design.
https://www.weetcap.com/Diodes-Rectifiers/WEET_SMA_SMAJ_Series.html
Overall, SMAJ5.0CA has a wide range of applications and can be found in multiple fields due to its excellent protection performance and electrical parameter characteristics. SMAJ5.0CA is an indispensable protective component in both consumer electronics and high demand industrial applications.
In the rapid development of modern electronic technology, crystal resonators, as key components for providing stable frequencies, play a vital role. Among them, surface mount crystal resonators have been widely used in many fields with their unique advantages.
WQC-TF1610 is a high-performance surface mount crystal resonator that operates in the 32.768KHz frequency band. It adopts advanced manufacturing technology and design concepts, with a small package size (1.6×1.0×0.5mm), excellent frequency stability (±10ppm / ±20ppm) and good electrical performance. The design fully considers the needs of modern electronic equipment for miniaturization, high precision and high reliability, and can provide a stable and accurate frequency source for various applications.
Technical features and advantages
1. High-precision frequency control
The crystal resonator of WQC-TF1610 can provide extremely high-precision frequency output with extremely small errors. Its frequency accuracy can reach one millionth of a level, ensuring the accuracy and stability of electronic equipment during operation. For example, in smart metering equipment, precise frequency control is essential for accurate measurement and data transmission.
2. Excellent temperature stability
The WQC-TF1610 performs well in a mixed and changing environment, and can automatically compensate for the effect of temperature on frequency and maintain a stable output. It can work stably whether in the extremely cold northern winter or the hot southern summer. This feature is particularly important in electronic equipment for outdoor applications, such as remote monitoring systems and meteorological monitoring equipment.
3. Low power design
The WQC-TF1610 adopts a low-power design concept, which greatly reduces the energy consumption of the equipment. For devices that rely on batteries and need to run for a long time, such as wireless sensor nodes and portable medical devices, it can significantly extend the battery life and reduce the trouble and cost of frequent battery replacement.
4. Compact package size
The small size design of the WQC-TF1610 enables it to be easily integrated into space-constrained circuit boards. This provides strong support for the thinness and miniaturization of electronic products, making the design of equipment more flexible and diverse.
5. Good anti-interference ability
It has excellent anti-electromagnetic interference and mechanical vibration interference capabilities. In complex electromagnetic environments, such as industrial automation production lines and communication base stations, it can ensure that the frequency output is not interfered by the outside world and ensure the normal operation of the equipment.
https://www.weetcap.com/Crystals-Oscillators/WEET-WQC-TF1610-32.768KHz-SMD-Tuning-Fork-Crystal.html
The tuning fork quartz crystal or clock crystal is one of the oldest quartz crystal designs. Originally used for timekeeping in watches and clocks, tuning forks are now also used in modern electronic products such as computers as real-time clocks (RTCs). Hundreds of millions of these uniquely shaped quartz crystals are produced by global suppliers every year. Tuning fork crystals are available in a variety of sizes to meet design needs, and there is a trend towards smaller surface mount crystal packages every year.
Tuning Fork Quartz Crystal (also known as cylindrical crystal oscillator) refers to a crystal oscillator with a quartz crystal wafer that looks like a tuning fork. It is a quartz crystal resonator that is often used to provide clock frequencies to ensure that electronic devices can work properly. The common frequency of tuning fork crystal oscillators is 32.768KHZ, and the main sizes are ‌DIP:3.0x8.0mm(WQC-TF308), 2.0x6.0mm(WQC-TF206), and are commonly used in remote controls, quartz watches, clocks, computers, home appliance automatic control and industrial automatic control, etc.
As the name suggests, quartz crystals are made of quartz. Traditionally, quartz is a naturally occurring hard mineral, but most quartz today is grown synthetically in autoclaves, which provides a higher standard purity than natural quartz. Quartz is used because it becomes piezoelectric and generates an electrical charge when mechanical pressure and tension are applied. This pressure causes mechanical vibrations that we call frequency.
Quartz needs to be cut at precise angles to initiate specific vibration modes and ensure that the piezoelectric effect works. One of the most common crystal designs is the AT Cut crystal. The frequency of an AT Cut crystal is determined by the thickness of the crystal. For example: the thinner the crystal, the higher the frequency. The vibration quality of the crystal will directly determine whether a parallel or series resonant crystal is required for the crystal oscillator circuit design.
The most common quartz crystal frequency is 32.768kHz. This frequency has become common because when 32.768kHz is divided by 2/15, there is a 1Hz signal. This 1Hz signal will always provide a second. This provides a reliable timekeeping system for the advent of days, dates, and times. The frequency of the classic tuning fork is ultimately a result of simple arithmetic operations and the general conditions of quartz production.
The tuning fork crystal is named because its quartz oscillator is cut into the shape of a tuning fork. It is not because its appearance resembles a tuning fork as some people say on the Internet. Due to technical and process reasons, early tuning fork crystal oscillators were mostly cylindrical, which gave many people the misunderstanding that tuning fork crystal= cylindrical crystal.
With the continuous miniaturization of electronic products, higher requirements are placed on the external dimensions of tuning fork crystal. Tuning fork crystals using surface mounting have also appeared.
WQC-TF206 32.768KHZ quartz crystal/tuning fork crystal/clock crystal/TV crystal/cylindrical crystal is most suitable for relatively economical electronic products, such as children's toys, ordinary household appliances, and can make the product highly reliable even in the field of automotive electronics. It can also be used for the CPU clock signal source part of the safety control device, just like the quartz crystal on the clock microcontroller. Under extremely harsh environmental conditions, the crystal can also work normally, with stable oscillation characteristics, high heat resistance, heat cycle resistance and vibration resistance and other high reliability performance.
The design of the electrode of the quartz crystal product has the following functions for the quartz crystal components: 1. Change the frequency; 2. Lead the electrode to the outside world; 3. Change the resistance; 4. Suppress the noise. Items 1, 2, and 3 are relatively simple, and the design of item 4 is very critical. The shape, size, thickness, and type of electrode (such as gold, silver, etc.) will lead to changes in item 4. In particular, as the size of the crystal chip decreases, there are higher requirements for the shape, size, and accuracy of the chip electrode design---the consistency of the tolerance size and position has an increasing impact on the crystal product, so more precise requirements are put forward for the design of the electrode, quartz watch crystal for clocks, cylindrical package crystal.
WQC-TF206 and WQC-TF308 are direct-insertion ordinary tuning fork crystal resonators (quartz crystal resonators, passive crystal) launched by WEET, which are packaged in metal shells. Their frequencies are both the commonly used frequency of 32.768KHz, and the inflection point temperature is 25±3℃ (the frequency changes the least with temperature near the inflection point), which is very suitable for personal computers and clocks.
These two direct-insertion crystal resonators have low power consumption, and the typical value of the excitation power is only 1.0μW; the commonly used load capacitance is 6pF, 7pF, 9pF, 12.5pF; the frequency tolerance at 25℃ is ±10ppm, ±20ppm.
Product features of TF-206 and TF-308 direct-insert crystal resonators:
Resistor welding type crystal resonator
Standard frequency of 32.768 KHz
Higher frequency pull (change in crystal frequency caused by changes in load conditions) and lower equivalent series resistance (ESR);
Low cost, which can greatly improve production capacity
Pb-free, RoHS compliant
Typical Application of WEET 6A10:
https://www.weetcap.com/Diodes-Rectifiers/WEET_R6_6A05_THRU_6A10.html
1. Power rectification: In small power adapters and chargers, 6A10 is commonly used to convert alternating current (AC) to direct current (DC). This is because it has a reverse voltage capacity of up to 1000 volts, making it very suitable for power conversion in household appliances and personal electronic devices.
2. Motor drive: In the motor control system, 6A10 can be used to rectify the current generated by the motor to provide stable DC power supply. Its high current carrying capacity ensures stable current during motor start-up or high load operation.
3. Solar energy system: In solar power generation systems, 6A10 can be used as a rectifier between components to optimize the electricity generated by solar panels, improve the overall efficiency and stability of the system.
4. Telecommunications equipment: In communication equipment, 6A10 is used to protect circuits and prevent voltage fluctuations or reverse currents from damaging sensitive communication equipment.
5. Automotive Electronics: In automotive electronic products, 6A10 is used to rectify the input of car chargers or other electronic devices to ensure stable DC power supply to the electronic devices.
Main Parameter characteristics of WEET 6A10:
-Maximum reverse voltage: The maximum reverse voltage of 6A10 can reach 1000 volts, which enables it to operate stably in high voltage environments and is very suitable for high-voltage circuit applications.
-Forward current: The forward current of this diode can reach up to 6 amperes, making it suitable for applications carrying large currents, ensuring the efficiency and safety of current transmission in the circuit.
-Maximum forward voltage drop: The forward voltage drop of 6A10 is usually around 1.1 volts, ensuring that the circuit can efficiently transmit current while minimizing energy loss.
-Packaging type: The common packaging form for 6A10 is DO-201AD, which makes it easy to install and beneficial for heat dissipation, improving its reliability and lifespan in high-temperature environments.
-Working temperature: The working temperature range is wide, generally between -65 ° C and 150 ° C, which enables 6A10 to adapt to various extreme environmental conditions and maintain stable performance in working environments ranging from severe cold regions to high temperatures.
BZX55C4V3 is a low-power voltage regulator diode commonly used in various electronic devices.
Its application scenarios are very extensive, and the following will provide a detailed introduction to its parameter characteristics and application scenarios.
https://www.weetcap.com/Diodes-Rectifiers/WEET_LL34_BZV55C2V4_THRU_BZV55C75.html
Parameter characteristics of WEET BZX55C4V3:
1. High stability: As a voltage regulator diode, BZX55C4V3 has high stability and can provide stable output voltage under different load conditions.
2. Low power consumption: The low-power characteristics of BZX55C4V3 make it suitable for circuits that require long-term operation, effectively reducing energy consumption.
3. Accurate output: BZX55C4V3 can provide precise output voltage to ensure the normal operation of other components in the circuit.
4. Good temperature stability: BZX55C4V3 can maintain stable performance at different temperatures and is suitable for electronic devices under various environmental conditions.
5. Compact design: The compact design of BZX55C4V3 enables it to be easily integrated into various circuit boards, saving space.
Typical Application of WEET BZX55C4V3:
1. Power stabilization: BZX55C4V3 is commonly used as a power regulator in various electronic devices to ensure stable voltage for all components in the circuit.
2. Signal processing: In signal processing circuits, BZX55C4V3 can be used as a protective component to prevent overvoltage from damaging other sensitive components.
3. Instrument measurement: In the field of instrument measurement, BZX55C4V3 can be used to ensure the accuracy and stability of the measurement circuit.
4. Communication equipment: BZX55C4V3 is often used as a voltage stabilizer in communication equipment to ensure the normal operation of the equipment under different power conditions.
5. Automotive Electronics: In automotive electronic systems, BZX55C4V3 can be used to stabilize the voltage of onboard electronic devices and improve the overall system reliability.
In summary, BZX55C4V3, as a voltage regulator diode, has important application value in various electronic devices. Its high stability and low power consumption make it an ideal choice for many circuit designs.
