Power Management IC (PMIC) integrating battery charging, power regulation, fuel gauging, and system management for single-cell Li-ion, Li-poly, and LiFePO₄ batteries. It features a 4–100 mA linear battery charger, two 200 mA buck regulators, two configurable 50 mA LDOs or 100 mA load switches, USB-C compatible input (4.0–5.5 V) with 22 V overvoltage protection, and an I²C-compatible TWI interface with watchdog, hard reset, power-loss warning, GPIOs, and LED drivers. #PMIC #PowerManagementIC #BatteryCharger #FuelGauge #BuckRegulator #LDO #USBTypeC #I2C #TWI #NordicSemiconductor #LiIon #LiPo #LiFePO4

Single 8-to-1 CMOS Low Voltage 2-Wire Serially Controlled, Matrix Switches analog switch selector multiplexer TWI I2C IIC 8-to-1 TSSOP*4.4x5mm*P0.65mm*

8-Bit, Octal-Channel, Ultra-Low Glitch, Voltage Output, Two-Wire Interface Digital-to-Analog Converters, TSSOP-16 DAC I2C TWI 8-channel TSSOP*4.4x5mm*P0.65mm*

Low-Cost 128-Step Volatile I2C Digital Potentiometer, SC-70-6 TWI pot *SC?70*

IC RF TxRx + MCU 802.15.4, Bluetooth Bluetooth v5.0, Thread, Zigbee® 2.4GHz 48-VFQFN Exposed Pad The NRF52840-QFAA-F-R belongs to Nordic’s nRF52 series and supports multiple wireless standards including Bluetooth 5, Bluetooth Low Energy (BLE), Thread, Zigbee, ANT, and proprietary 2.4 GHz protocols. It features a 64 MHz ARM Cortex-M4F CPU with floating-point unit (FPU), making it suitable for both wireless communication and real-time embedded processing. The device integrates large memory resources, rich peripherals, USB support, NFC capability, and advanced security features, reducing the need for external components in wireless embedded designs. Key Features 32-bit ARM Cortex-M4F processor running at 64 MHz 1 MB Flash memory and 256 KB RAM Supports Bluetooth 5 / BLE, Thread, Zigbee, ANT, and proprietary 2.4 GHz protocols IEEE 802.15.4 compliant radio Up to +8 dBm TX output power High receiver sensitivity down to −103 dBm Data rates up to 2 Mbps Ultra-low power consumption for battery-powered applications USB 2.0 Full-Speed controller NFC-A tag support Multiple communication interfaces: SPI UART I2C (TWI) I2S PWM PDM ADC Up to 48 GPIOs Integrated ARM CryptoCell-310 security engine Operating voltage range: 1.7 V to 5.5 V Operating temperature: −40°C to +85°C Compact 48-QFN (6×6 mm) package Typical Applications BLE devices Smart home products Wearables Wireless sensors Industrial IoT HID devices (keyboard/mouse) Asset tracking Mesh networking devices USB dongles and gateways PCB Design Notes Community PCB reviews commonly recommend: Proper RF grounding and 50-ohm antenna routing Using ESD/TVS protection on USB lines Keeping RF matching components close to the antenna Using solid ground planes for 2.4 GHz performance #CommonPartsLibrary #IntegratedCircuit #RF

802.15.4, Bluetooth, WiFi 802.11a/b/g/n/ac/ax, Bluetooth v5.3, Zigbee® Transceiver Module 2.4GHz, 5GHz Antenna Not Included, U.FL/MHF, PCB Trace Surface Mount The LBES5PL2EL-923 is a compact, low-power Bluetooth® Low Energy (BLE) module developed by Murata. It integrates a Nordic Semiconductor SoC (nRF52 series) with an onboard antenna, providing a complete RF solution for wireless connectivity in embedded systems. The module is designed for IoT, wearable, and low-power wireless applications, offering reliable communication, small footprint, and minimal external component requirements. Key Features Integrated Bluetooth® Low Energy (BLE) 5.x compliant module Based on Nordic Semiconductor nRF52 series SoC Built-in chip antenna (no external antenna required) Ultra-low power consumption suitable for battery-powered devices Integrated RF matching and shielding Supports multiple BLE roles (Central, Peripheral, Broadcaster, Observer) Compact surface-mount package Pre-certified RF module (reduces certification effort) Electrical Characteristics Supply Voltage Operating Voltage: 1.7 V to 3.6 V Current Consumption TX Mode: ~5–10 mA (depending on output power) RX Mode: ~5 mA Sleep Mode: < 2 µA RF Characteristics Frequency Band: 2.4 GHz ISM (2400–2483.5 MHz) Output Power: up to +4 dBm Sensitivity: approx. -96 dBm Interfaces UART SPI I²C (TWI) GPIO (multiplexed) ADC inputs PWM Mechanical Specifications Package Type: Surface Mount Module (SMD) Dimensions: ~10 mm × 7 mm × 1.4 mm (approx.) Integrated antenna and shielding Environmental Ratings Operating Temperature: -40°C to +85°C Storage Temperature: -40°C to +125°C Compliance & Certifications Bluetooth SIG qualified FCC / IC / CE (module-level certification, varies by variant) RoHS compliant Applications IoT devices Wearables Smart home products Wireless sensors Industrial monitoring systems Pin Configuration (Summary) Power: VDD, GND Communication: UART, SPI, I²C GPIOs: Configurable digital I/O RF: Integrated antenna (no RF pin required) Design Considerations Follow recommended PCB layout for antenna clearance Avoid copper under antenna region Provide stable power supply with proper decoupling capacitors Ensure proper grounding for RF performance #commonpartslibrary #integratedcircuit #transceiver #wireless #rf

Dual 4-to-1 CMOS Low Voltage 2-Wire Serially Controlled, Matrix Switches analog switch selector multiplexer TWI I2C IIC 4-to-1 TSSOP*4.4x5mm*P0.65mm*

IO expander 16 GPIO, I2C 400kHz, Interrupt, 1.65 - 5.5V, TSSOP-24 I2C TWI IO expander TSSOP*4.4x7.8mm*P0.65mm*

8-Bit, Octal-Channel, Ultra-Low Glitch, Voltage Output, Two-Wire Interface Digital-to-Analog Converters, QFN-24 DAC I2C TWI 8-channel QFN*1EP*4x4mm*P0.5mm*

Low-Cost 128-Step Volatile I2C Digital Potentiometer, SC-70-5 TWI pot rheostat *SC?70*

802.15.4, Bluetooth Bluetooth v5.1 Transceiver Module 2.4GHz Integrated, Chip Surface Mount Bluetooth® 5.1 Low Energy module for standalone wireless communication, integrating an Arm® Cortex®-M4F MCU with 512 kB Flash and 128 kB RAM for embedded applications. It operates from a 1.7 V to 3.6 V supply, supports Bluetooth LE at 2.4 GHz with data rates up to 2 Mbps, and provides UART, USB, SPI, I²C (TWI), I²S, GPIO, ADC, PWM, PDM, and QDEC interfaces in a compact 6.5 × 6.5 × 1.2 mm surface-mount System-in-Package (SiP). #BluetoothModule #Bluetooth5_1 #BluetoothLowEnergy #OpenCPU #2_4GHz #UART #SPI #I2C #USB

QFP80P1600X1600X120-64N https://ww1.microchip.com/downloads/en/DeviceDoc/atmegas128_ds.pdf Rad-Tol 8-bit AVR Microcontroller, 3.3V, 8 MHz with 128 KB Flash, 4 KB EEPROM, 4 KB SRAM, 10-bit ADC, TWI, RTC, 16-bit PWM, USART, SPI and 16-bit Timer/Counter 1.2 Microchip ATMEGAS128-MD-HP N/A https://www.mouser.co.uk/ProductDetail/Microchip-Technology/ATMEGAS128-MD-HP?qs=sPbYRqrBIVk98zCv1OqHjw%3D%3D

128KB, TQFP32, 85C, 24MHZ, 12B ADC, COMP, OPAMP, MVIO, ZCD, DAC, UART, SPI, TWI, 32 TQFP 7X7X1MM TRAY ROHS COMPLIANT: YES

AVR AVR® ATmega Microcontroller IC 8-Bit 20MHz 32KB (16K x 16) FLASH 28-PDIP 8-bit AVR microcontroller for embedded control applications, featuring 32 KB ISP Flash, 2 KB SRAM, and 1 KB EEPROM. Operates from 1.8 V to 5.5 V with a maximum clock frequency of 20 MHz, and integrates 23 programmable I/O pins, three timers/counters, a 6-channel 10-bit ADC, USART, SPI, I²C (TWI), analog comparator, watchdog timer, and multiple power-saving sleep modes. Supplied in a 28-pin PDIP package. #AVR #ATmega328P #8BitMCU #Microchip #EmbeddedSystems #ISPFlash #10BitADC #USART #SPI #I2C #PDIP28 #CommonPartsLibrary #Microcontroller #Atmega328

IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, SSOP-24 I2C TWI IO expander SSOP*5.3x8.2mm*P0.65mm*

IO expander 16 GPIO, I2C 400kHz, Interrupt, 1.65 - 5.5V, HWQFN-24 I2C TWI IO expander *QFN*1EP*4x4mm*P0.5mm*

IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, SOIC-24 I2C TWI IO expander SOIC*7.5x15.4mm*P1.27mm*

IO expander 16 GPIO, I2C 400kHz, Interrupt, 2.3 - 5.5V, TSSOP-24 I2C TWI IO expander TSSOP*4.4x7.8mm*P0.65mm*

IC RF TXRX+MCU BLE 48QFN 64 MHz Cortex-M4 with FPU 512/64 KB Flash 2.4 GHz Transceiver 2 Mbps, 1 Mbps Bluetooth Low Energy Bluetooth mesh +4 dBm TX power 128-bit AES UART, SPI, TWI, PDM, I2S PWM 12-bit ADC NFC-A #microcontrollers #Nordic #commonpartslibrary

lowprokb Choc (V1) Ambients Twilight Red Pushbutton Switch SPST-NO Keyswitch Through Hole CPG135001D02 This switch is used in keyboards like: Planck Vortexgear KBD67 ErgoDox leopold WorkLouder Varmilo Ducky Durgod Mistel Keebio Iris iKBC WASD Keychron Filco GATERON MMD HMX Geonworks Durock JWK C³Equalz Kailh and many others #Cherry #CherryMX

Character Display Module Reflective 5 x 8 Dots TN - Twisted Nematic Without Backlight Parallel 66.00mm x 26.00mm x 6.50mm #commonpartslibrary #character #displaymodule #optoelectronic #led