An xtal electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency.

Bipolar (BJT) Transistor NPN 40V 200 mA 300MHz 300 mW Surface Mount SOT-23-3 (TO-236) The MMBT3904LT1G is a general-purpose NPN bipolar junction transistor designed for switching and amplification applications. It is housed in a compact SOT-23 surface-mount package, making it suitable for high-density PCB designs. This transistor is widely used in low-power signal processing, digital switching, and analog amplification circuits due to its reliable performance and fast switching characteristics. Key Features General-purpose NPN transistor Compact SOT-23 surface-mount package Fast switching speed Low saturation voltage Suitable for low-current and low-power applications High reliability and stability Pb-free, Halogen-free, and RoHS compliant Electrical Characteristics (Typical @ 25°C unless otherwise specified) Collector-Emitter Voltage (VCEO): 40 V Collector-Base Voltage (VCBO): 60 V Emitter-Base Voltage (VEBO): 6 V Collector Current (IC): 200 mA (max) DC Current Gain (hFE): 100 – 300 Collector-Emitter Saturation Voltage (VCE(sat)): 0.2 V (typ) Transition Frequency (fT): ~300 MHz Absolute Maximum Ratings Collector Current (Continuous): 200 mA Power Dissipation: ~225 mW Junction Temperature: +150°C (max) Operating Temperature Range: -55°C to +150°C Storage Temperature Range: -55°C to +150°C Mechanical Characteristics Package Type: SOT-23 (TO-236AB) Mounting Type: Surface Mount Number of Pins: 3 Marking Code: Dependent on lot/manufacturer marking Applications General-purpose switching circuits Signal amplification Digital logic interfacing LED drivers and small load switching Audio and RF signal processing #CommonPartsLibrary #TransistorBJT #MMBT2222

The NE555 devices are precision timing circuits capable of producing accurate time delays or oscillation. In time-delay or monostable operating modes, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle are controlled independently with two external resistors and a single external capacitor. Each timer has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage pin (CONT). When the trigger input (TRIG) is less than the trigger level, the flip-flop is set and the output goes high. If TRIG is greater than the trigger level and the threshold input (THRES) is greater than the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) overrides all other inputs and is used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a lowimpedance path is provided between the discharge pin (DISCH) and the ground pin (GND). Tie all unused inputs to an appropriate logic level to prevent false triggering. The output circuit is capable of sinking or sourcing current up to 200mA. Operation is specified for supplies of 5V to 15V. With a 5V supply, output levels are compatible with TTL inputs. Features - Timing from microseconds to hours - Astable or monostable operation - Adjustable duty cycle - TTL-compatible output can sink or source up to 200mA - On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. Applications - Pulse-shaping circuits - Missing-pulse detectors - Pulse-width modulators - Pulse-position modulators - Sequential timers - Pulse generators -F requency dividers - Industrial controls

ARM® Cortex®-M0+ STM32G0 Microcontroller IC 32-Bit Single-Core 64MHz 32KB (32K x 8) FLASH 8-SOIC The STM32G031J6M6 is a compact, low-power 32-bit microcontroller from STMicroelectronics, based on the Arm® Cortex®-M0+ core running at up to 64 MHz. It belongs to the STM32G0 series, designed for cost-sensitive and energy-efficient embedded applications. This MCU integrates essential peripherals, memory, and system functions into a small package (8-pin SOIC), making it suitable for consumer electronics, industrial control, appliances, and IoT devices where space and power efficiency are critical. Key Features Core & Performance 32-bit Arm Cortex-M0+ CPU Up to 64 MHz clock frequency Memory Protection Unit (MPU) for improved reliability and security 💾 Memory 32 KB Flash memory (program storage) 8 KB SRAM Flash protection (read/write protection, secure area) Peripherals & Interfaces Communication: I2C (2x) SPI (2x) / I2S USART (2x) + Low-power UART 12-bit ADC (up to ~2.5 MSps, multiple channels) DMA controller (5 channels) Timers: Advanced PWM timer (motor control capable) General-purpose timers (16-bit & 32-bit) Low-power timers Watchdog timers RTC (Real-Time Clock) with VBAT backup Power & Efficiency Operating voltage: 1.7 V to 3.6 V Multiple low-power modes: Sleep, Stop, Standby, Shutdown Optimized for low energy consumption (battery-powered designs) I/O & Package Up to 44 GPIOs (depending on package) 6 GPIOs available in the 8-pin (J6M6) package 5V-tolerant I/O pins (select pins) Compact SOIC-8 package#commonpartslibrary #integratedcircuit #microcontroller

LED Driver IC 16 Output Linear PWM Dimming 25mA 5.5V 28-TSSOP PCA9685PW,118 is a 16-channel, 12-bit PWM LED controller with an I²C interface designed for LED dimming, RGB/RGBA lighting, and servo motor control applications. It provides independent PWM control for up to 16 outputs, allowing precise brightness or position control while minimizing MCU GPIO usage. The device supports Fast-mode Plus I²C communication up to 1 MHz and operates from a 2.3 V to 5.5 V supply range. It is commonly used in robotics, LED backlighting, automation systems, and PWM expansion modules for microcontrollers such as Arduino, ESP32, and Raspberry Pi. Key Features 16 independent PWM output channels 12-bit PWM resolution (4096 steps) Programmable PWM frequency from approximately 24 Hz to 1526 Hz I²C Fast-mode Plus compatible interface up to 1 MHz Six hardware address pins allowing up to 62 devices on one I²C bus Programmable open-drain or totem-pole outputs Output capability: 25 mA sink current 10 mA source current Internal 25 MHz oscillator with optional external clock input Individual programmable LED ON/OFF timing for reduced EMI and current surges Supports software reset and group addressing (All Call/Sub Call) 5.5 V tolerant inputs and outputs Operating voltage range: 2.3 V to 5.5 V Package: 28-pin TSSOP (PW suffix) #CommonPartsLibrary #IntegratedCircuit #PowerManagement #LEDdriver

5.025GHz Center Frequency Band Pass RF Filter (Radio Frequency) 9.95GHz Bandwidth 2dB 6-SMD, Flat Leads #commonpartslibrary #RF #integratedcircuit

CH32V003 is an industrial-grade microcontroller with a 48MHz main frequency, low power consumption, small size, and built-in DMA controllers, ADC, timers, and communication interfaces. #RISC-V #IoT #MCU

Buck Switching Regulator IC Positive Fixed 3.3V 1 Output 2A SOT-23-6 Thin, TSOT-23-6 The AP63200/AP63201/AP63203/AP63205 is a 2A, synchronous buck converter with a wide input voltage range of 3.8V to 32V and fully integrates a 125mΩ high-side power MOSFET and a 68mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion. The AP63200/AP63201/AP63203/AP63205 device is easily used by minimizing the external component count due to its adoption of peak current mode control along with its integrated compensation network. The AP63200/AP63201/AP63203/AP63205 has optimized designs for Electromagnetic Interference (EMI) reduction. The converter features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time. It also has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which further erases highfrequency radiated EMI noise caused by MOSFET switching. The device is available in a low-profile, TSOT26 package. • VIN 3.8V to 32V • 2A Continuous Output Current • 0.8V ±1% Reference Voltage • 22µA Ultralow Quiescent Current • Switching Frequency o 500kHz: AP63200 and AP63201 o 1.1MHz: AP63203 and AP63205 • Pulse Width Modulation (PWM) Regardless of Output Load o AP63201 • Supports Pulse Frequency Modulation (PFM) o AP63200, AP63203, and AP63205 o Up to 80% Efficiency at 1mA Light Load o Up to 88% Efficiency at 5mA Light Load • Fixed Output Voltage o 3.3V: AP63203 o 5.0V: AP63205 • Proprietary Gate Driver Design for Best EMI Reduction • Frequency Spread Spectrum (FSS) to Reduce EMI • Precision Enable Threshold to Adjust UVLO • Protection Circuitry o Overvoltage Protection o Cycle-by-Cycle Peak Current Limit o Thermal Shutdown • 12V and 24V distributed power bus supplies • Flat screen TV sets and monitors • Power tools and laser printers • White goods and small home appliances • FPGA, DSP, and ASIC supplies • Home audios • Network systems • Set top boxes • Gaming consoles • Consumer electronics #commonpartslibrary #integratedcircuit #AP63203WU7 #BuckConverter #DCDCConverter #PowerManagement #VoltageRegulator #SynchronousBuck #EmbeddedSystems #IndustrialElectronics #PowerSupply #DiodesInc #3V3Power #ElectronicsDesign

15µH Shielded Drum Core, Wirewound Inductor 5.45 A 25.8mOhm Max Nonstandard The 7447798151 is a 15 µH shielded wirewound drum core inductor optimized for high current power applications. It features low DC resistance and high saturation current capability, making it suitable for compact, high-frequency power designs. Key Features Inductance: 15 µH High current rating: up to 5.45 A (RMS) Saturation current: ~4 A Low DC resistance: 25.8 mΩ max Shielded construction for low EMI / magnetic leakage High self-resonant frequency: ~19 MHz Wide operating temperature: -40°C to +150°C Compact SMD package (~10.2 mm × 10.2 mm footprint) Typical Applications DC-DC converters (buck / boost) Power supply filtering Automotive and industrial power systems Point-of-load (POL) regulators High-frequency switching circuits #WurthElektronik #WEPDF #PowerInductor #15uH #SMDInductor #ShieldedInductor #PowerElectronics #ElectronicsComponents #SMTComponents #CommonPartsLibrary #Fixed-Inductor

The Wi-Fi HaLow Board based on the FGH100M-H module is a high-performance, long-range Wi-Fi HaLow solution. Operating in the 902-928 MHz frequency band, it offers excellent penetration and coverage, making it ideal for smart home and IoT applications. With its compact design and compatibility with the Seeed Studio XIAO ecosystem, this card ensures reliable and efficient connectivity for various projects.

Charger IC Multi-Chemistry 12-DFN (3x3) Input Voltage Range 4.95V to 34V Fixed Frequency 1MHz 12-DFN (3x3) #CommonPartsLibrary #IntegratedCircuits #BatteryChargers #LT3652

Bipolar (BJT) Transistor Array 2 PNP (Dual) Matched Pair 65V 100mA 175MHz 380mW Surface Mount 6-TSOP The BCM856DS,115 is a dual matched PNP bipolar junction transistor (BJT) housed in a compact SOT-363 (SC-88) 6-pin surface-mount package. It consists of two independent PNP transistors with closely matched electrical characteristics, making it suitable for differential amplifier stages, current mirrors, and signal processing applications where symmetry and thermal tracking are important. Key Features Dual PNP transistor configuration in a single package Matched transistor pair for improved circuit stability Low collector-emitter saturation voltage High current gain consistency between channels Compact SOT-363 (SC-88) package for space-constrained designs Suitable for low-power and signal-level applications Electrical Characteristics (typical values unless otherwise noted) Collector-Emitter Voltage (VCEO): -45 V Collector-Base Voltage (VCBO): -50 V Emitter-Base Voltage (VEBO): -5 V Continuous Collector Current (IC): -100 mA per transistor Power Dissipation (Ptot): ~250 mW total DC Current Gain (hFE): 100 to 300 Transition Frequency (fT): ~100 MHz Package Information Package Type: SOT-363 (SC-88) Mounting: Surface Mount Pin Count: 6 Configuration: Dual PNP (E1, B1, C2, E2, B2, C1 pin arrangement depending on layout) Applications Differential amplifier input stages Current mirror circuits Signal amplification Analog front-end designs Matched pair transistor applications Additional Notes The two transistors are thermally coupled within the same package, improving matching over temperature variations Ideal for precision analog circuits requiring closely matched transistor characteristics Commonly used in compact and high-density PCB layouts #commonpartslibrary #transistor #bjt #pnp

Phase Lock Loop (PLL) IC 2.4MHz 1 16-DIP (0.300", 7.62mm) CD4046BE is a CMOS Micropower Phase-Locked Loop (PLL) integrated circuit that combines a linear Voltage-Controlled Oscillator (VCO), two phase comparators, a source follower, and a Zener diode in a single package. It is designed for frequency synthesis, frequency detection, FM demodulation, clock recovery, motor speed control, and other synchronization applications. The device operates over a wide supply voltage range and offers low power consumption, high noise immunity, and excellent VCO linearity. Key Features Wide operating supply voltage range: 3 V to 18 V Integrated Voltage-Controlled Oscillator (VCO) Two selectable phase comparators for flexible PLL design Operating frequency range up to approximately 1.4 MHz Very low power consumption High VCO linearity (typically <1%) Low frequency drift with temperature VCO inhibit control for ON/OFF keying applications Built-in source follower output for demodulation applications High noise immunity characteristic of CMOS technology Available in 16-pin PDIP (CD4046BE) package Typical Applications Frequency synthesis and multiplication FM modulation and demodulation Frequency discrimination Clock recovery and data synchronization Tone decoding Voltage-to-frequency conversion FSK modulation/demodulation Motor speed control systems Signal tracking and phase synchronization circuits Hashtags #CD4046BE #PLL #PhaseLockedLoop #VCO #ClockRecovery #FrequencySynthesizer #FMDemodulator #FSKModulation #CMOS #TexasInstruments #AnalogIC #TimingIC #SignalProcessing #EmbeddedSystems #ElectronicsDesign