USB-to-UART Bridge CP2102N CP2102N-A02-GQFN28R is a highly integrated USB-to-UART bridge controller from Silicon Labs that provides a simple and reliable interface between a USB host and an embedded system using a UART serial port. It eliminates the need for complex USB firmware development by handling all USB protocol functions internally and presenting a standard UART interface to the target device. The device is commonly used in microcontroller programming, debugging, industrial equipment, IoT devices, and USB-to-serial adapters. logging equipment Consumer and portable electronics Function: USB-to-UART Bridge Controller

USB-to-UART Bridge CP2102N-A02-GQFN24 is a highly integrated USB-to-UART bridge controller from Silicon Labs. It provides a simple and cost-effective way to add USB connectivity to embedded systems by converting USB 2.0 Full-Speed communication into a standard UART interface. The device integrates the USB transceiver, oscillator, voltage regulator, and UART controller, minimizing external components and eliminating the need for USB firmware development. It is commonly used in microcontroller programming interfaces, industrial equipment, POS terminals, data loggers, and USB-to-serial adapters. Key Features USB 2.0 Full-Speed compliant (12 Mbps) interface. USB-to-UART bridge with data rates up to 3 Mbaud. Integrated USB transceiver; no external USB resistors required. Integrated oscillator; no external crystal required. On-chip 3.3 V voltage regulator. USB Battery Charger Detection (BC 1.2) support. Remote wakeup capability from USB suspend state. Low operating current of approximately 9.5 mA. Hardware and software flow control support. Internal configurable ROM for Vendor ID, Product ID, serial number, and USB descriptors. Royalty-free Virtual COM Port (VCP) drivers available for major operating systems. Operating temperature range: −40°C to +85°C. Compact 24-pin QFN (4 mm × 4 mm) package. Typical Applications USB-to-Serial adapters Microcontroller programming and debugging interfaces Industrial automation equipment Point-of-sale (POS) terminals Medical instruments Data acquisition and logging systems Embedded systems requiring USB connectivity #commonpartslibrary #integratedcircuit

USB to Serial Port Chip CH9101 CH9101N is a high-speed USB-to-UART bridge IC developed by WCH (Qinheng Electronics). It converts a USB 2.0 Full-Speed interface into a standard asynchronous UART serial interface, enabling seamless communication between a computer and microcontrollers, embedded systems, industrial equipment, and other UART-based devices. The device features an integrated clock oscillator and power-on reset circuitry, minimizing external components and simplifying PCB design. Housed in a compact SOP-8 package, the CH9101N supports UART logic voltages from 1.8 V to 5 V, making it suitable for a wide range of low-power and mixed-voltage applications. It is commonly used for USB debugging, firmware downloading, serial communication, and IoT development. Key Features USB 2.0 Full-Speed compliant device interface USB-to-UART bridge with baud rates up to 3 Mbps Supports 1.8 V, 2.5 V, 3.3 V, and 5 V UART I/O levels Integrated clock oscillator (no external crystal required) Built-in power-on reset circuitry Full-duplex UART communication Supports hardware flow control (RTS/CTS) Compatible with standard virtual COM port (VCP) drivers Compact SOP-8 package with minimal external components Suitable for MCU programming, debugging, and serial communication applications #CH9101N #WCH #USBtoUART #USBBridge #UART #USB20 #SerialCommunication #EmbeddedSystems #Microcontroller #IoT #IndustrialAutomation #Debugging #FirmwareDownload #SOP8 #InterfaceIC

USB to Serial Interface, SSOP-28 FTDI USB Serial SSOP*5.3x10.2mm*P0.65mm* The FT232RL is a full-speed USB 2.0 to asynchronous serial data transfer IC. It integrates all the necessary USB protocol handling and UART interface logic, making it very easy to add USB connectivity to embedded devices without requiring complex firmware development. It is commonly used in development boards (like Arduino clones), USB-to-TTL converters, and debugging interfaces. Key Features USB Interface Fully compliant with USB 2.0 Full-Speed (12 Mbps) Integrated USB transceiver (no external components required) Supports USB suspend/resume modes Internal EEPROM for storing USB descriptors (no external EEPROM needed) Serial (UART) Interface Supports standard UART communication (TX, RX) Configurable baud rates from 300 bps up to 3 Mbps Supports hardware flow control (RTS/CTS, DTR/DSR) Bit-bang mode for simple GPIO control Integrated Components Built-in clock generator (no external crystal required) Internal EEPROM for configuration Integrated voltage regulator (3.3V output available for external use) Power Features Operates from 3.3V to 5V Can be powered directly from USB (bus-powered) Low power consumption with sleep mode Driver Support Virtual COM Port (VCP) drivers available for: Windows Linux macOS Also supports direct D2XX driver for advanced applications Package Typically available in SSOP-28 package Common Applications USB-to-serial converters (TTL/RS232) Microcontroller programming and debugging Embedded system communication Industrial and instrumentation interfaces

The XL6007 regulator is a wide input range, current mode, DC/DC converter which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. The XL6007 built in N-channel power MOSFET and fixed frequency oscillator, current-mode architecture results in stable operation over a wide range of supply and output voltages. The XL6007 regulator is special design for portable electronic equipment.  Wide 3.6V to 24V Input Voltage Range  Positive or Negative Output Voltage Programming with a Single Feedback Pin  Current Mode Control Provides Excellent Transient Response  1.25V reference adjustable version  Fixed 400KHz Switching Frequency  Maximum 2A Switching Current  SW PIN Built in Over Voltage Protection  Excellent line and load regulation  EN PIN TTL shutdown capability  Internal Optimize Power MOSFET  High efficiency up to 90%  Built in Frequency Compensation  Built in Soft-Start Function  Built in Thermal Shutdown Function  Built in Current Limit Function  Available in SOP8 package Applications  Automotive and Industrial Boost / Buck-Boost / Inverting Converters  Portable Electronic Equipment #commonpartslibrary #integratedcircuit

CONN HEADER 8POS 2.54mm DUAL ROW SMD The 2.54-2×4P is a generic 8-pin dual-row connector/header with a 2.54 mm (0.1 inch) pitch, commonly used for board-to-board, wire-to-board, and programming/debug interfaces in electronic circuits. The designation 2×4P indicates two rows of four pins, providing a total of eight electrical connections in a compact arrangement. This type of connector is widely used in embedded systems, development boards, industrial control equipment, consumer electronics, and prototyping applications due to its standard pitch and broad compatibility with jumper wires, IDC cables, and mating sockets. Key Features 2.54 mm standard pitch (0.1 inch industry standard) 2×4 pin configuration (8 total contacts) Available in through-hole (THT) and sometimes surface-mount (SMT) versions Supports board-to-board and wire-to-board connections Compatible with standard jumper wires and ribbon cable connectors Compact dual-row design for higher pin density Typically constructed with gold-plated or tin-plated contacts for reliable electrical performance Suitable for signal, control, and low-power applications Commonly used for programming, debugging, communication interfaces, and expansion headers Available in straight (vertical) or right-angle orientations depending on manufacturer Typical Applications Microcontroller and development boards ISP/JTAG/SWD programming headers Sensor and peripheral connections Industrial control systems Prototyping and breadboard-compatible designs Communication interfaces and expansion ports #CommonPartsLibrary #Connector

Battery Multi-Function Controller IC Lithium Ion/Polymer 32-VFQFPN (5x5) L9961 is part of a complete battery pack monitoring, balancing, and protecting system for Li-Ion and Li-Polymer cells in 3, 4 or 5 series configurations. The L9961 uses a high precision ADC to provide cell voltage, stack voltage and temperature conversion via external NTC. Voltage monitoring functions are cyclically performed with a programmable loop time. Stack current is also monitored via a high accuracy CSA, continuously running and performing also Coulomb counting. Cell balancing is available and can be simultaneously activated on all cells. IC configuration and information exchange for SOC/SOH estimation are performed via I2C peripheral. The IC also integrates a dual pre-driver programmable in both HS/LS configurations for driving pack relays. L9961 also implements battery pack fuse protection to prevent fire and explosion hazards. A 3.3 V regulator with a high current capability is available for supplying pack controller and other external circuitry in both standby and normal operation modes. The IC protects the battery pack against over/under voltage conditions and monitors for over/ under temperature. It also features protection against overcurrent (both directions) and short-circuit in discharge events. Safety-relevant configurations can be stored in the internal NVM to avoid re-programming the device at each wake-up. Features • 2 μA shipment - DEEP SLEEP mode current and 5 μA standby consumption (with VREG LDO active) standby consumption (with VREG LDO active) • Integrated 3.3 V VREG LDO for supplying MCU and LEDs • Measures cell voltage (3 to 5 cells), with over/undervoltage detection and balance undervoltage protection • 12-bit voltage measurement with maximum error of ±15 mV in the [1.5 – 4.5] V range, for -40 °C < TJ < 105 °C • Measures stack voltage, with over/under voltage detection and plausibility check vs. sum of cells • Measures pack temperature via NTC, with over/undertemperature detection • Ratiometric temperature measurement with ±0.8% max. gain error in the [0.2 – VREG] V range, for -40 °C < TJ < 105 °C • Measures battery current, with Coulomb counting, overcurrent (both directions) and short-circuit in discharge protection. • 16-bit signed current measurement with 0.1% full scale error at room temperature • I 2C peripheral for device programming and data transfers over I2C bus • Cell balancing supporting up to 70 mA per cell • Dual configurable HS/LS predriver for pack relay management • Pack fuse management • Embedded NVM for configuration parameters storage • High hotplug robustness Applications • Cordless power tools • Backup energy storage systems and UPS • Light electric vehicles (e-bikes, scooters, etc.) • Portable and semi-portable equipment • Medical equipment #L9961TR #BatteryManagement #BMS #LiIonBattery #LiPoBattery #STMicroelectronics #BatteryProtection #CellBalancing #CoulombCounting #PowerManagement #EmbeddedSystems #EnergyStorage #EBike #PowerTools #ElectronicsDesign