Interface ICs

The CH9102X is a high-speed USB-to-UART bridge IC developed by WCH (Jiangsu Qinheng Microelectronics). It enables seamless communication between a USB host and UART-based embedded systems, making it ideal for programming, debugging, firmware updates, and serial data communication. The device integrates a USB 2.0 Full-Speed interface, an internal clock, power-on reset, and firmware, eliminating the need for an external crystal oscillator. The CH9102X variant supports 3.3 V UART I/O and is widely used on development boards such as ESP32 and other MCU-based designs. Key Features USB 2.0 Full-Speed (12 Mbps) compliant device interface USB-to-UART bridge supporting baud rates from 50 bps to 4 Mbps 3.3 V UART I/O (CH9102X variant) Integrated clock oscillator (no external crystal required) Built-in power-on reset circuit Hardware full-duplex UART with independent TX/RX buffers Supports 5, 6, 7, or 8 data bits Supports None, Odd, Even, Mark, and Space parity Supports RTS/CTS hardware flow control Supports MODEM signals: RTS, CTS, DTR, DSR, DCD, and RI TNOW output for automatic RS-485 transmit/receive control Compatible with built-in CDC drivers and vendor VCP drivers on major operating systems Available in compact RoHS-compliant QFN packages #CH9102X #USBtoUART #USBBridge #UART #SerialConverter #WCH #USB20 #EmbeddedSystems #ESP32 #MCU #RS485 #FirmwareUpdate #Debugging #IoT #PCBDesign

32.768 kHz ±20ppm Crystal 9pF 70 kOhms 2-SMD, No Lead The XTL721-S999-301 specification defines the engineering requirements for a crystal oscillator component intended to provide a stable and accurate timing reference for electronic systems. This specification establishes the functional, electrical, mechanical, environmental, and quality requirements necessary to ensure precise frequency generation, reliable operation, and long-term stability in embedded, industrial, communication, and consumer electronic applications. The component is intended for use in applications requiring accurate clock generation and synchronization, including microcontroller-based systems, communication interfaces, digital signal processing, and timing circuits. It provides a highly stable frequency reference with low phase noise and excellent frequency stability to support reliable system operation under varying environmental conditions. Engineering Requirements The crystal component shall be manufactured using high-purity quartz material and precision fabrication processes to ensure consistent resonant frequency characteristics, low aging effects, and dependable long-term performance. The construction shall provide stable oscillation characteristics throughout the specified operating temperature and environmental conditions. Electrical characteristics shall ensure accurate frequency stability, low equivalent series resistance, and reliable oscillation startup when used with compatible oscillator circuits. The component shall maintain stable timing performance under normal supply variations, temperature fluctuations, and continuous operating conditions. Mechanical construction shall be suitable for automated surface-mount assembly and compatible with standard solder reflow manufacturing processes. The package shall provide mechanical robustness and resistance to vibration, mechanical shock, thermal cycling, and handling without degradation of electrical performance or structural integrity. Workmanship shall be free from defects including contamination, package cracking, seal failure, lead deformation, or structural inconsistencies that could adversely affect frequency accuracy or operational reliability. Inspection, validation, and testing shall be performed using calibrated equipment and controlled quality procedures to verify compliance with engineering and manufacturing requirements. Any deviation from this specification shall require formal engineering evaluation, documented technical justification, and approval through the established engineering change control process before implementation. Documentation Supporting documentation shall include engineering drawings, frequency performance specifications, electrical characterization reports, qualification records, inspection reports, reliability data, material declarations, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure complete product traceability. Revision Control Any modification to this specification shall be managed through the formal engineering change management process. All revisions shall undergo technical review, validation, and approval before release to ensure continued compliance with design intent and applicable engineering standards. #EngineeringSpecification #CrystalOscillator #QuartzCrystal #TimingDevice #ClockGenerator #EmbeddedSystems #IndustrialElectronics #FrequencyControl #QualityAssurance #EngineeringDocumentation

N-Channel 100 V 171A (Tc) 188W (Tc) Surface Mount PG-WSON-8-2 The BSC030N10NS5SCATMA1 specification defines the engineering requirements for an N-channel power MOSFET designed for high-efficiency switching and power management applications. This specification establishes the functional, electrical, mechanical, thermal, environmental, and quality requirements necessary to ensure reliable switching performance, low conduction losses, and long-term operational stability in power electronic systems. The device is intended for use in DC-DC converters, synchronous rectification circuits, motor control systems, battery management systems, power distribution modules, and industrial electronic equipment. It provides low on-state resistance, fast switching characteristics, and efficient power handling, making it suitable for high-frequency and high-current applications requiring optimized efficiency and thermal performance. Engineering Requirements The power MOSFET shall be manufactured using advanced semiconductor fabrication processes and qualified materials to ensure consistent electrical characteristics, high switching efficiency, and reliable long-term operation. The device shall maintain stable performance under specified voltage, current, and environmental operating conditions. Electrical characteristics shall provide low on-state resistance, high current-carrying capability, low gate charge, and fast switching performance to minimize conduction and switching losses. The device shall maintain stable operation during repetitive switching cycles, transient load conditions, and dynamic power management applications. Thermal performance shall support efficient heat dissipation through the package structure and printed circuit board interface. The component shall maintain electrical integrity and operational reliability within the specified junction temperature range during continuous and intermittent high-power operation. Mechanical construction shall be suitable for automated surface-mount assembly and compatible with standard solder reflow manufacturing processes. The package shall withstand vibration, thermal cycling, mechanical handling, and environmental exposure without degradation of electrical or mechanical performance. Workmanship shall be free from defects including contamination, cracks, bond failures, package deformation, or structural inconsistencies. Inspection, validation, and testing shall be conducted using calibrated equipment and controlled quality procedures to verify compliance with all applicable engineering and manufacturing requirements. Any deviation from this specification shall require formal engineering evaluation, documented technical justification, and approval through the established engineering change control process. Documentation Supporting documentation shall include engineering drawings, electrical performance specifications, thermal characterization reports, qualification records, inspection reports, material declarations, reliability data, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure complete product traceability. Revision Control Any modification to this specification shall be managed through the formal engineering change management process. All revisions shall undergo technical review, validation, and approval before implementation to ensure continued compliance with design intent and applicable engineering standards. #EngineeringSpecification #PowerMOSFET #NChannelMOSFET #PowerElectronics #PowerManagement #MotorControl #DCDCConverter #Semiconductor #QualityAssurance #EngineeringDocumentation #commonpartslibrary #transistor #mosfet

ARM® Cortex®-M0+ MSPM0 C Microcontroller IC 32-Bit 24MHz 16KB (16K x 8) FLASH 8-DSBGA (0.86x1.6) MSPM0C110x microcontrollers (MCUs) are part of the MSP highly-integrated ultra-low-power 32-bit MCU family based on the enhanced Arm® Cortex®-M0+ core platform operating at up to 24MHz frequency. These costoptimized MCUs offer high-performance analog peripheral integration, support extended temperature ranges from -40°C to 125°C, and operate with supply voltages from 1.62V to 3.6V. The MSPM0C110x devices provide up to 16KB embedded flash program memory with 1KB SRAM. These MCUs incorporate a high-speed on-chip oscillator with an accuracy from -2% to +1.2%, eliminating the need for an external crystal. Additional features include a 1-channel DMA, CRC-16 accelerator, and a variety of highperformance analog peripherals such as one 12-bit 1.5Msps ADC with VDD as the voltage reference, and an on-chip temperature sensor. These devices also offer intelligent digital peripherals such as one 16-bit advanced timer, two 16-bit general purpose timer, one windowed watchdog timer, and a variety of communication peripherals including one UART, one SPI, and one I2C. These communication peripherals offer protocol support for LIN, IrDA, DALI, Manchester, smart card, SMBus, and PMBus. The TI MSPM0 family of low-power MCUs consists of devices with varying degrees of analog and digital integration let customers find the MCU that meets their project needs. The architecture combined with extensive low-power modes is optimized to achieve extended battery life in portable measurement applications. MSPM0C110x MCUs are supported by an extensive hardware and software ecosystem with reference designs and code examples to get the design started quickly. Development kits include a LaunchPad™ kit available for purchase and design files for a target-socket board. TI also provides a free MSP Software Development Kit (SDK), which is available as a component of Code Composer Studio™ IDE desktop and cloud version within the TI Resource Explorer. MSPM0 MCUs are also supported by extensive online collateral, training with MSP Academy, and online support through the TI E2E™ support forums. Features • Core – Arm® 32-bit Cortex®-M0+ CPU, frequency up to 24MHz • Operating characteristics – Extended temperature: –40°C to 125°C – Wide supply voltage range: 1.62V to 3.6V • Memories – Up to 16KB of flash – 1KB of SRAM • High-performance analog peripherals – One analog-to-digital converter (ADC) with up to 10 total external channels, 1.7Msps at 10 bit or 1.5Msps at 12 bit with VDD as the voltage reference – Configurable 1.4V or 2.5V internal ADC voltage reference (VREF) – Integrated temperature sensor – Integrated supply monitor • Optimized low-power modes – RUN: 87µA/MHz – STOP: 609µA at 4MHz, 311µA at 32kHz – STANDBY: 5µA with SRAM retention – SHUTDOWN: 200nA • Intelligent digital peripherals – 1-channel DMA controller dedicated for ADC – Three timers supporting up to 14 PWM channels • One 16-bit advanced timers with deadband support up to 8 PWM channels • One 16-bit general purpose timer with 4 capture/compares • One 16-bit general purpose timer with 2 capture/compares – Windowed watchdog timer – BEEPER generating 1kHz, 2kHz, 4kHz, or 8kHz square wave to drive the external beeper • Enhanced communication interfaces – One UART interface supporting LIN, IrDA, DALI, smart card, Manchester and low-power operation in STANDBY mode – One I2C interface supporting FM+ (1Mbps), SMBus, PMBus, and wakeup from STOP mode – One SPI supporting up to 12Mbps • Clock system – Internal 24MHz oscillator with an accuracy from -2% to +1.2% (SYSOSC) – Internal 32kHz low-frequency oscillator (LFOSC) • Data integrity – Cyclic redundancy checker (CRC-16) • Flexible I/O features – Up to 18 GPIOs – Two 5V-tolerant open-drain IOs • Development support – 2-pin serial wire debug (SWD) • Package options – 20-pin TSSOP (PW) – 20-pin VSSOP (DGS) – 20-pin WQFN (RUK) – 16-pin SOT (DYY) – 8-pin SOT (DDF) – 8-pin WSON (DSG) – 8-pin DSBGA (YCJ) • Family members (also see Device Comparison) – MSPS003F4: 16KB of flash, 1KB of RAM – MSPS003F3: 8KB of flash, 1KB of RAM – MSPM0C1104: 16KB of flash, 1KB of RAM – MSPM0C1103: 8KB of flash, 1KB of RAM • Development kits and software (also see Tools and Software) – LP-MSPM0C1104 LaunchPad™ development kit – MSP Software Development Kit (SDK) 2 Applications • Battery charging and management • Power supplies and power delivery • Personal electronics • Building security and fire safety • Connected peripherals and printers • Grid infrastructure • Smart metering • Communication modules • Medical and healthcare • Lighting #MSPM0C1104S8YCJR #MSPM0C1104 #TexasInstruments #CortexM0Plus #Microcontroller #EmbeddedSystems #LowPowerMCU #IoT #WearableDevices #IndustrialControl #ConsumerElectronics #ADC #UART #SPI #I2C #PWM #TI #ElectronicsDesign #PCBDesign #EmbeddedDevelopment

ADC, Audio 32 b 8k ~ 192k I2S 20-WQFN (3x3) The PCM1822 is a high-performance, Burr-Brown™ audio analog-to-digital converter (ADC) that supports simultaneous sampling of up to two analog channels. The device supports single-ended and differential line and microphone inputs with a 1-VRMS full-scale signal. The device integrates a phase-locked loop (PLL), a DC removal high-pass filter (HPF), and supports sample rates up to 192 kHz. The device supports time-division multiplexing (TDM) or I2S audio formats, selectable with the hardware pin level. Additionally, the PCM1822 supports master and slave mode selection for the audio bus interface operation. These integrated high-performance features, along with the ability to be powered from a single supply of 3.3 V, make the device an excellent choice for costsensitive, space-constrained audio systems in far-field microphone recording applications. The PCM1822 is specified from –40°C to +125°C, and is offered in a 20-pin WQFN package. Features • Stereo high-performance ADC: – 2-channel analog microphones or line-in • ADC line and microphone differential and singleended input performance: – PCM1822 dynamic range: • 117-dB, dynamic range enhancer enabled • 111-dB, dynamic range enhancer disabled – THD+N: –95 dB • 1-VRMS full-scale input • ADC sample rate (fS) = 8 kHz to 192 kHz • Hardware pin control configurations • Linear-phase or low-latency filter selection • Flexible audio serial data interface: – Master or slave interface selection – 32-bits, 2-channel TDM – 32-bits, 2-channel I2S • Automatic power-down upon loss of audio clocks • Integrated high-performance audio PLL • Single-supply operation: 3.3 V • I/O-supply operation: 3.3 V or 1.8 V • Power consumption for 3.3-V AVDD supply: – 19.6 mW/channel at 16-kHz sample rate – 21.3 mW/channel at 48-kHz sample rate #CommonPartsLibrary #IntegratedCircuit #PCM1822IRTER #TexasInstruments #AudioADC #StereoADC #BurrBrown #I2S #TDM #AudioElectronics #EmbeddedAudio #SmartSpeaker #AVReceiver #HighResolutionAudio #PCBDesign #ElectronicsDesign #SignalProcessing

Fully calibrated temperature and humidity sensor with digital output and I²C interface The AHT30 is a high-precision digital temperature and humidity sensor developed by AOSONG Electronics. It integrates a capacitive humidity sensing element, a temperature sensor, and a dedicated ASIC in a compact DFN package. The device provides fully calibrated digital output through an I²C interface, offering low power consumption, excellent long-term stability, and reliable performance in demanding environmental conditions. It is widely used in smart home devices, HVAC systems, industrial controls, weather monitoring equipment, IoT devices, and consumer electronics. Key Features Fully calibrated digital temperature and humidity sensor I²C digital communication interface Relative humidity measurement range: 0% to 100% RH Temperature measurement range: -40°C to +85°C High accuracy: up to ±2% RH and ±0.3°C (typical) Wide operating voltage: 2.2 V to 5.5 V Low power consumption Fast response time Excellent long-term stability Strong anti-interference capability Compact DFN package suitable for reflow soldering Optimized ASIC with improved MEMS sensing technology Applications Smart home and IoT devices HVAC and air quality monitoring Weather stations Consumer electronics Medical equipment Industrial monitoring and control systems Refrigerators, dehumidifiers, and air conditioners Hashtags #AHT30 #AOSONG #TemperatureSensor #HumiditySensor #EnvironmentalSensor #I2C #MEMS #SmartHome #IoT #HVAC #IndustrialAutomation #WeatherMonitoring #EmbeddedSystems #ElectronicsDesign #PCBDesign

ESP32-WROOM32 ESP32 802.11 b/g/n (WiFi/WLAN/Wi-Fi 4), Bluetooth® Smart 4.x Low Energy (BLE) Transceiver 2.4GHz Evaluation Board ESP32-POE is an ESP32-based IoT development board that combines Wi-Fi, Bluetooth, Ethernet connectivity, and Power over Ethernet (PoE) in a single platform. It is designed for industrial automation, smart home systems, remote monitoring, and other network-connected embedded applications where both power and data can be delivered through a single Ethernet cable. The board supports the ESP32 dual-core processor and provides expansion interfaces for sensors, storage, and peripherals. FEATURES • ESP32-WROOM-32 WiFi/BLE module • Ethernet 100Mb interface with IEEE 802.3 PoE support • LiPo battery charger • LiPo battery connector • UEXT connector • User button • Reset button • Micro USB with programmer for ESP32 programming • MicroSD card • Two extension connectors 0.1" step spaced at 1" • PCB dimensions: (75 x 28)mm ~ (3 x 1)" #ESP32 #ESP32POE #IoT #Ethernet #PoE #WiFi #Bluetooth #EmbeddedSystems #IndustrialIoT #SmartHome #OpenSourceHardware #Microcontroller #EdgeComputing #Automation #MakerProjects

1 Ohms ±1% 2W Chip Resistor 2512 (6332 Metric) Current Sense Thick Film The CRM2512-FX-1R00ELF specification defines the engineering requirements for a surface-mount current sense resistor designed for precision current measurement and power management applications. This specification establishes the functional, electrical, mechanical, thermal, environmental, and quality requirements necessary to ensure accurate resistance performance, efficient power dissipation, and long-term operational reliability in electronic systems. The component is intended for use in power supplies, battery management systems, motor control circuits, industrial automation equipment, and embedded electronic applications requiring precise current monitoring. The resistor provides a low-resistance element for current sensing while maintaining high measurement accuracy, thermal stability, and compatibility with automated surface-mount manufacturing processes. Engineering Requirements The resistor shall be manufactured using high-quality resistive materials and controlled fabrication processes to ensure stable resistance characteristics, low temperature coefficient, and reliable long-term performance. The construction shall provide consistent electrical behavior throughout the specified operating conditions without significant drift or degradation. Electrical characteristics shall ensure accurate resistance value, stable current sensing performance, and low inductance suitable for high-frequency switching environments. The component shall maintain its specified tolerance and thermal performance under continuous rated power and transient load conditions. Thermal performance shall support efficient heat dissipation through the package structure and printed circuit board interface. The resistor shall withstand normal solder reflow processes and maintain structural integrity during thermal cycling, vibration, and mechanical handling. Mechanical construction shall be compatible with standard surface-mount assembly processes and shall provide reliable solder joint formation. Workmanship shall be free from defects including cracks, delamination, contamination, plating irregularities, or structural inconsistencies that could adversely affect electrical or mechanical performance. Inspection, validation, and testing shall be conducted using calibrated equipment and controlled quality procedures to verify compliance with all applicable engineering and manufacturing requirements. Any deviation from this specification shall require formal engineering evaluation, documented technical justification, and approval through the established engineering change control process. Documentation Supporting documentation shall include engineering drawings, electrical performance specifications, thermal characterization data, qualification reports, inspection records, material declarations, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure complete product traceability. Revision Control Any modification to this specification shall be managed through the formal engineering change management process. All revisions shall undergo technical review, validation, and approval before implementation to ensure continued compliance with design intent and applicable engineering standards. #EngineeringSpecification #CurrentSenseResistor #PowerElectronics #SurfaceMount #PrecisionResistor #IndustrialElectronics #PowerManagement #QualityAssurance #EngineeringDocumentation #ElectronicComponents

Laminated Core 1.1VA Power Transformer 115V Primary Parallel 6.3V, Series 12.6V Secondary Parallel 180mA, Series 90mA Through Hole The F12-090-C2 specification defines the engineering requirements for an electronic connector component intended to provide reliable electrical interconnection between printed circuit boards, cable assemblies, or electronic subsystems. This specification establishes the functional, mechanical, electrical, environmental, and quality requirements necessary to ensure dependable signal transmission, secure mechanical engagement, and long-term operational reliability. The component is intended for use in embedded, industrial, communication, and electronic control systems where compact interconnect solutions and consistent electrical performance are required. The connector is designed to support repeated mating cycles while maintaining low contact resistance, stable mechanical retention, and compatibility with standard electronic assembly processes. Engineering Requirements The connector shall be manufactured using precision-formed conductive contacts and high-strength insulating materials to ensure consistent electrical conductivity, mechanical durability, and long service life. The construction shall support reliable mating and unmating operations without degradation of contact performance. Electrical characteristics shall provide low contact resistance, stable signal integrity, and reliable current-carrying capability within the specified operating conditions. The connector shall maintain electrical continuity under vibration, thermal cycling, and environmental exposure encountered during normal operation. Mechanical construction shall ensure accurate alignment of mating interfaces, secure retention, and resistance to mechanical wear resulting from repeated insertion and removal. The housing and contact system shall withstand normal handling and assembly processes without deformation or structural damage. Workmanship shall be free from defects including contamination, cracks, corrosion, plating irregularities, or mechanical deformation that could adversely affect electrical or mechanical performance. Inspection, validation, and testing shall be conducted using calibrated equipment and controlled quality procedures to verify compliance with engineering requirements. Any deviation from this specification shall require formal engineering evaluation, documented technical justification, and approval through the established engineering change control process prior to implementation. Documentation Supporting documentation shall include engineering drawings, material specifications, electrical performance data, inspection records, qualification reports, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure complete product traceability. Revision Control Any modification to this specification shall be processed through the formal engineering change management system. All revisions shall undergo technical review, validation, and approval before release to ensure continued compliance with design intent and applicable industry standards. #EngineeringSpecification #Connector #ElectronicInterconnect #SignalIntegrity #EmbeddedSystems #IndustrialElectronics #ElectricalEngineering #Manufacturing #QualityAssurance #EngineeringDocumentation