Through hole straight pin header, 1x04, 4 pin, 4-pin, horizontal, angled, 2.54mm pitch, 6mm pin lenght single row

868/915MHz Impedance Matched, Multi-Function, Integrated Ceramic Passive Component for Texas Instruments CC112x, CC117x & CC12xx Chipsets CC1120 CC1121 CC1125 CC1175 CC1200 CC1201 balun Balun*Johanson*0900PC15J0013*

Use this spacing tool to set the spacing between your traces for a 90 ohm differential pair - Use "JLC3313" 4 layer stackup - Route on Top with L2 reference or Bottom with L3 reference - Trace width of both traces should be 200um

868MHz/915MHz Sub-GHz Impedance Matched Filter integrated passive for Semtech SX1261, SX1262, LLCC68 Sub-GHz filter Balun*Johanson*0900FM15K0039*

600CT Impedance Primary Ohms 600CT Impedance Secondary Ohms 1:1 Audio Transformer 200Hz ~ 15kHz Through Hole #Transformer #TY

1kCT Impedance Primary Ohms 1kCT Impedance Secondary Ohms 1:1, 2:1 Audio Transformer 20Hz ~ 20kHz Through Hole #Transformer #TY

Audio Transformers / Signal Transformers 500-3000MHz IL 3dB Impedance Ratio 1:4 #commonpartslibrary #transformer

Battery Battery Monitor IC Lithium Ion 9-DSBGA The BQ27220YZFR is a highly integrated single-cell battery fuel gauge IC developed for rechargeable lithium-ion and lithium-polymer battery applications. The device utilizes Texas Instruments’ Impedance Track™ algorithm to provide highly accurate battery capacity measurement, state-of-charge estimation, runtime prediction, and battery health monitoring across varying load and temperature conditions. The device is designed for compact portable electronics, wearable devices, IoT products, handheld instruments, and low-power embedded systems requiring precise battery monitoring and extended operating life. The BQ27220YZFR supports system-side fuel gauging without requiring battery pack-side electronics, simplifying battery integration and reducing overall system cost. The fuel gauge continuously monitors battery voltage, current, and temperature to estimate available capacity, remaining runtime, full charge capacity, and state-of-health information. Integrated low-power operation enables ultra-low standby current consumption suitable for always-on battery-powered products. Communication with the host processor is implemented through a standard I²C interface, allowing configuration access, telemetry reporting, and battery parameter monitoring. The device also integrates protection and alert functionality through programmable interrupt outputs and battery condition monitoring features. The BQ27220YZFR is optimized for use with single-cell lithium-based chemistries and supports learning cycles for adaptive battery characterization over product lifetime. Internal data flash memory stores battery profile information and calibration parameters to improve long-term gauging accuracy. The device is supplied in a compact lead-free wafer chip-scale package suitable for space-constrained PCB designs and portable electronics requiring minimal footprint and low-profile assembly. Electrical Characteristics Device Type Single-cell battery fuel gauge and battery monitor IC Battery Chemistry Support Lithium-ion and lithium-polymer rechargeable batteries Input Voltage Range Supports single-cell battery operation Fuel Gauging Method Impedance Track™ algorithm Communication Interface I²C serial interface Measurement Functions Battery voltage monitoring Battery current monitoring Battery temperature monitoring State-of-charge estimation Remaining capacity calculation Full charge capacity estimation State-of-health reporting Runtime prediction Power Consumption Ultra-low operating current for portable applications Temperature Monitoring External thermistor support Host Alert Features Interrupt and alert reporting capability Data Storage Integrated nonvolatile configuration memory Calibration Features Automatic learning and battery characterization support Protection Monitoring Battery condition and system monitoring functions Package Type DSBGA wafer chip-scale package Mounting Style Surface mount Operating Temperature Range Industrial temperature operation suitable for portable electronics Functional Features High-accuracy fuel gauging over battery lifetime Adaptive battery modeling and aging compensation Low-power operation for battery-powered systems Integrated battery profiling capability Real-time remaining runtime estimation Automatic battery learning cycles Compact PCB footprint for portable devices System-side implementation without smart battery pack requirement Programmable battery alert functionality Support for low-power embedded processors and mobile systems Optimized for wearable and IoT applications RoHS compliant and lead-free package construction #commonpartslibrary #integratedcircuit #powermanagement #batterymanagement

Comparator Standard (General Purpose) Open-Collector, Rail-to-Rail 8-PDIP The LM393N is a dual independent voltage comparator designed for operation from a single power supply over a wide range of voltages. It can also operate from split power supplies, allowing flexible integration into analog and mixed-signal systems. Each comparator features high gain and low input offset voltage, enabling precise comparison between two input signals. The device is optimized for low power consumption and supports open-collector outputs, making it suitable for interfacing with a variety of logic families and external circuits. Its robust design allows reliable performance across a broad temperature range, making it appropriate for industrial, automotive, and consumer applications. Functional Overview The device contains two separate comparators sharing a common power supply. Each comparator compares the voltage at its inverting and non-inverting inputs and drives the output transistor accordingly. The open-collector output stage allows wired-OR configurations and easy level shifting using an external pull-up resistor. When the non-inverting input voltage exceeds the inverting input voltage, the output transistor turns off, allowing the output to be pulled high externally. When the inverting input is higher, the transistor conducts and pulls the output low. Electrical Characteristics The LM393N operates over a wide supply voltage range and exhibits low input bias current and low input offset voltage, contributing to stable and accurate performance. The input common-mode voltage range includes ground, enabling ground-referenced sensing. The output stage is capable of sinking current sufficient to drive loads such as LEDs, relays (with appropriate buffering), or logic inputs. The device is designed for low supply current, supporting energy-efficient designs. Input and Output Behavior Inputs are high impedance and suitable for direct connection to sensors, reference voltages, or signal conditioning networks. The output requires an external pull-up resistor to define the high logic level. This configuration allows flexibility in selecting output voltage levels independent of the supply voltage, within device limits. The open-collector structure also supports multiple outputs connected together for logical operations. Thermal and Environmental Conditions The device is specified for operation across a wide temperature range, ensuring stable functionality under varying environmental conditions. Proper thermal management and adherence to recommended operating conditions ensure long-term reliability. Packaging and Pin Configuration The LM393N is typically provided in a dual in-line package suitable for through-hole mounting. The pin configuration supports two independent comparator channels, each with inverting input, non-inverting input, and output, along with shared power supply and ground connections. Applications The LM393N is suitable for voltage level detection, threshold sensing, zero-crossing detection, oscillator circuits, pulse generation, and analog-to-digital interfacing. It is commonly used in power management systems, battery monitoring, signal conditioning, and embedded control systems. Design Considerations External components such as pull-up resistors, input filtering networks, and hysteresis feedback may be required depending on the application. Careful layout and noise considerations improve performance in high-sensitivity circuits. The open-collector output requires proper configuration to ensure correct logic levels and switching behavior. #commonpartslibrary #integratedcircuit #comparator

Amplifier IC 2-Channel (Stereo) Class D 16-SOP PAM8403 mini amplifier module The PAM8403DR is a filterless Class-D stereo audio amplifier IC manufactured by Diodes Incorporated, designed to deliver efficient, high-quality audio amplification in compact, battery-powered, and USB-powered consumer electronics. The device integrates two independent amplifier channels within a single integrated circuit, providing a complete stereo audio power amplification solution without requiring significant external passive components, making it one of the most widely used Class-D audio amplifier ICs in the consumer and embedded electronics market. AllDataSheet The Class-D amplification topology used in this device operates by switching the output stage rapidly between supply rail voltage states rather than linearly driving an analog output signal, resulting in significantly higher power conversion efficiency than traditional Class-AB amplifiers. This high efficiency means that the vast majority of the power drawn from the supply is delivered to the speaker loads rather than being dissipated as heat within the IC itself, which is critical in battery-powered applications where minimizing power consumption extends operating time, and in compact enclosures where thermal management is constrained. The filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. In conventional Class-D amplifiers, the high-frequency switching content in the output must be removed by a passive LC output filter before the signal can be applied to a speaker, adding component cost and board footprint. The PAM8403's filterless design achieves its output filtering effect through the natural inductance of the speaker voice coil itself, eliminating the external filter requirement entirely in most applications while maintaining low distortion and good audio fidelity. AllDataSheet The device incorporates protection circuitry to safeguard both itself and the connected speaker loads from fault conditions that can arise during normal use, including output short-circuit events, excessive junction temperature caused by high ambient temperature or heavy output loading, and supply voltage conditions outside the normal operating range. These protection features allow the device to recover automatically from transient fault conditions without damage or requiring manual reset, improving system reliability and reducing the risk of speaker or amplifier damage in consumer products. The device supports a wide range of load impedances, making it compatible with the majority of commonly used small speaker drivers found in portable electronics, desktop multimedia systems, educational devices, and embedded audio applications. Its wide supply voltage operating range makes it directly compatible with USB bus power, single-cell lithium-ion battery power, and regulated supply rails commonly found in embedded system designs. The PAM8403DR is supplied in a compact surface-mount small-outline package on tape-and-reel packaging suitable for automated assembly, with construction compliant to RoHS material restrictions. Note that DigiKey currently lists this part as obsolete, though the device remains available through other distribution channels. Spec Sheet Identification Part Number: PAM8403DR Device Family: PAM8403 Manufacturer: Diodes Incorporated Functional Classification Device Type: Stereo Class-D audio power amplifier IC Amplifier Topology: Class-D switching amplifier Number of Channels: Dual channel, stereo Output Architecture: Filterless, direct speaker drive Electrical Characteristics Supply Voltage Range: Wide-range supply, compatible with USB bus power and single-cell lithium battery rails Output Power Class: Low-watt stereo class, suitable for small speaker drivers Output Load Impedance: Compatible with standard small speaker load impedances Audio Quality: Low total harmonic distortion plus noise for high-quality sound reproduction Efficiency: High efficiency class-D conversion, low heat dissipation Protection Features Short-Circuit Protection: Integrated output short-circuit protection Thermal Shutdown: Automatic overtemperature protection with recovery Undervoltage Lockout: Supply undervoltage detection and output disable EMI Management Filterless Operation: Speaker voice coil inductance acts as output filter Optional EMI Mitigation: Ferrite bead filter on speaker traces recommended for long trace lengths to reduce high-frequency EMI radiation Environmental & Qualification Operating Temperature Range: Extended industrial range RoHS Compliance: Yes Lifecycle Status: Obsolete at DigiKey; available through alternate distribution channels Package Package Type: Small-outline IC package, SOP-style Mounting: Surface mount technology (SMT) Packaging Format Supply Format: Tape-and-reel #PAM8403 #PAM8403DR #DiodesIncorporated #ClassDAmp #AudioAmplifier #StereoAmp #FilterlessClassD #PowerAmplifier #AudioIC #CompactAudio #USBPowered #BatteryPowered #PortableAudio #EmbeddedAudio #ConsumerElectronics #SOIC #SurfaceMount #SemiconductorIC #EngineeringSpec #ComponentLibrary #CommonPartsLibrary #RoHSCompliant #commonpartslibrary #integratedcircuit #amplifier

This incredibly small stereo amplifier is surprisingly powerful. It is able to deliver 2 x 2.8W channels into 4 ohm impedance speakers (@ 10% THD) and it has a i2c control interface as well as an AGC (automatic gain control) system to keep your audio from clipping or distorting

The Broadcom® ACPL-C87B/C87A/C870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing. Its 2V input range and high 1-GΩ input impedance, makes it well suited for isolated voltage sensing requirements in electronic power converters applications, including motor drives and renewable energy systems. In a typical voltage sensing implementation, a resistive voltage divider is used to scale the DC-link voltage to suit the input range of the voltage sensor. A differential output voltage that is proportional to the input voltage is created on the other side of the optical isolation barrier.

The Broadcom® ACPL-C87B/C87A/C870 voltage sensors are optical isolation amplifiers designed specifically for voltage sensing. Its 2V input range and high 1-GΩ input impedance, makes it well suited for isolated voltage sensing requirements in electronic power converters applications, including motor drives and renewable energy systems. In a typical voltage sensing implementation, a resistive voltage divider is used to scale the DC-link voltage to suit the input range of the voltage sensor. A differential output voltage that is proportional to the input voltage is created on the other side of the optical isolation barrier.

BZ-C0805-P2-E1 is a surface-mount ferrite bead designed for electromagnetic interference suppression and power line noise filtering in compact electronic systems. The component provides high impedance at high frequencies while maintaining low DC resistance, enabling effective attenuation of unwanted noise in power and signal lines without significantly affecting normal circuit operation. This ferrite bead is commonly used in embedded systems, switching power supplies, RF circuits, communication devices, consumer electronics, and industrial control equipment to improve electromagnetic compatibility and reduce conducted noise emissions. Its compact surface-mount package supports high-density PCB layouts and automated assembly processes for modern electronic manufacturing. The BZ-C0805-P2-E1 is optimized for stable filtering performance across a broad frequency range and is suitable for applications requiring signal integrity enhancement, noise isolation, and power rail stabilization. Its robust ceramic construction ensures dependable operation in portable and industrial electronic environments. #commonpartslibrary #ferritebead #emifilter #noisefilter #passivecomponents #embeddedhardware #electronicscomponents #powermanagement #surfacemountdevice #signalintegrity

Buffer, Non-Inverting 1 Element 1 Bit per Element 3-State Output SOT-25 The 74AHCT1G125 is a single non-inverting buffer/bus driver with a 3-state output. The output enters a high impedance state when a HIGH-level is applied to the output enable (OE) pin. The device is designed for operation with a power supply range of 4.5V to 5.5V. • Supply Voltage Range from 4.5V to 5.5V • ± 8 mA Output Drive at 5.0V • CMOS low power consumption • Schmitt Trigger Action at All Inputs Make the Circuit Tolerant for Slower Input Rise and Fall Time. • ESD Protection per JESD 22 o Exceeds 200-V Machine Model (A115-A) o Exceeds 2000-V Human Body Model (A114-A) o Exceeds 1000-V Charged Device Model (C101C) • Latch-Up Exceeds 100mA per JESD 78, Class II • SOT25 and SOT353: Assembled with “Green” Molding Compound (no Br, Sb) #commonpartslibrary #integratedcircuit #logic

RF Connectors / Coaxial Connectors KH-BNC75-3511 ANT-TH_KH-BNC75-3511 LCSC Part Number: C2837588 JLCPCB Part Class: Extended Part Manufactured by kinghelm(金航标) Kinghelm KH-801-0039 PCB mount BNC female jack connector, 75Ω characteristic impedance, right-angle through-hole mounting, 1/2-28 UNEF-2A threaded interface, frequency range up to 3GHz, VSWR ≤1.3, 500Vrms working voltage, insulation resistance ≥5000MΩ, operating temperature range -55°C to +155°C, designed for RF signal transmission, video, instrumentation and communication applications. Search Keywords: KH-801-0039, Kinghelm KH-801-0039, KH-BNC75-3511, BNC female connector, BNC jack connector, 75 ohm BNC connector, PCB mount BNC jack, right angle BNC connector, through hole BNC connector, RF coaxial connector, 1/2-28 UNEF-2A BNC, BNC PCB connector, video signal connector, RF connector 3GHz, Kinghelm BNC connector Hashtags: #KH8010039 #KHBNC753511 #Kinghelm #KinghelmConnector #BNCConnector #BNCJack #BNCFemale #75OhmBNC #PCBMountBNC #ThroughHoleBNC #RightAngleBNC #RFConnector #CoaxialConnector #VideoConnector #InstrumentationConnector #3GHzConnector #RFJack #PCBConnector #CommunicationConnector #BNCFemaleJack

Video Switch IC 1 Channel 14-SOIC The LMH6574MAX/NOPB is a high-speed, 4:1 video multiplexer amplifier manufactured by Texas Instruments. It is designed for routing multiple analog video or high-bandwidth signals into a single output while maintaining excellent signal integrity. With wide bandwidth, low distortion, and fast switching characteristics, it is well-suited for applications such as video switching, RGB routing, medical imaging, and high-speed data acquisition systems. Key Features 4:1 high-speed analog video multiplexer Wide small-signal bandwidth: ~500 MHz (typical) Fast channel switching time: ~8 ns (typical) Low differential gain and phase for video fidelity High slew rate: ~1800 V/µs Low crosstalk and channel-to-channel isolation Single-supply operation: 5 V TTL/CMOS compatible logic inputs Internal 75 Ω back-termination support (video applications) Output disable (high impedance mode) Electrical Characteristics Supply Voltage (Vcc): 4.5 V to 5.5 V Supply Current: ~13 mA (typical) Input Voltage Range: 0 V to Vcc Output Voltage Swing: ~2 Vpp (video typical) Gain: 2 V/V (fixed gain configuration) Input Resistance: High impedance Output Resistance: Low impedance (video drive capable) Dynamic Performance -3 dB Bandwidth: ~500 MHz Slew Rate: ~1800 V/µs Settling Time: ~10 ns Channel Switching Time: ~8 ns Crosstalk: <-60 dB (typical at 10 MHz) Package Information Package Type: SOIC-8 (MAX) Mounting Type: Surface Mount Lead Finish: NiPdAu (RoHS compliant) Operating Temperature Range: -40°C to +85°C Pin Configuration (Summary) 4 Analog Inputs (IN0–IN3) 1 Analog Output (OUT) 2 Digital Select Lines (A0, A1) Enable/Disable Control (EN) Power Supply (Vcc) Ground (GND) Applications Video signal routing and switching (RGB, CVBS) CCTV and broadcast systems Medical imaging equipment Test and measurement instruments High-speed analog multiplexing Data acquisition front-end switching Compliance & Notes RoHS compliant (NOPB = Lead-free package) Designed for 75 Ω video systems Requires proper PCB layout for high-frequency performance (controlled impedance, short traces) #commonpartslibrary #integratedcircuit

RF Amplifier IC 5G, TDD 600MHz ~ 2.8GHz 20-QFN (4x4) ## Engineering Specification ## General Description The **QPA9442TR13** is a Qorvo high-linearity RF pre-driver amplifier designed for wireless infrastructure, cellular communication systems, and high-performance RF transmit chain applications. It is intended for use in systems requiring wideband operation, strong linearity, stable gain performance, and compact surface-mount integration. The device is suitable for 5G, TDD, FDD, mobile infrastructure, massive MIMO, and general-purpose wireless designs. ## Device Identification Manufacturer Part Number: **QPA9442TR13** Manufacturer: **Qorvo** Device Category: **RF and Wireless Integrated Circuit** Device Type: **RF Amplifier** Functional Type: **High-Linearity RF Pre-Driver Amplifier** Application Class: **Wireless Infrastructure and 5G RF Front-End** ## Functional Description The device operates as a transmit-chain pre-driver amplifier, providing RF signal amplification before the final power amplification stage. It is designed to deliver high gain and high output linearity while supporting cellular-band tuning requirements. The amplifier includes shutdown control through a dedicated power-down function, allowing system-level power management in RF transmit applications. ## RF Performance Description The QPA9442TR13 supports wideband RF amplification for cellular and wireless infrastructure applications. It provides high linearity performance, strong compression-point capability, and output third-order intercept performance suitable for demanding transmit signal chains. The device is optimized for applications where signal quality, gain stability, and RF output performance are critical. ## Electrical Description The device is designed for single-supply operation and is suitable for low-voltage RF circuit designs. It requires proper RF matching, biasing, grounding, and thermal layout practices to achieve the intended performance. The part should be used according to the manufacturer’s recommended operating conditions and reference design guidance. ## Package and Mounting Description The component is supplied as a surface-mount RF integrated circuit in a compact QFN package with exposed pad construction. The package is intended for high-frequency printed circuit board layouts requiring controlled impedance routing, short RF signal paths, proper ground via placement, and effective thermal connection to the PCB ground plane. ## Protection and Control Features The amplifier includes internal RF overdrive protection and internal DC overvoltage protection. It also includes a DC power shutdown feature for power control and system-level enable or disable operation. ## Application Suitability The QPA9442TR13 is suitable for 5G base station equipment, massive MIMO radio systems, mobile infrastructure, TDD and FDD transmit systems, cellular RF front-end designs, general-purpose wireless equipment, and RF driver amplifier stages requiring high linearity and compact board-level integration. ## Design Considerations The device should be implemented with proper RF layout techniques, impedance-controlled traces, recommended matching networks, adequate grounding, and appropriate thermal management. Performance may vary depending on frequency tuning, PCB design, matching component selection, supply quality, and operating conditions. ## Hashtags #commonpartslibrary #integratedcircuit #rfamplifier #qorvo #qpa9442tr13 #qpa9442 #wirelesscomponents #rfic #semiconductor #electronicscomponents #rfdesign #wirelessinfrastructure #fiveg #tdd #fdd #massivemimo #mobileinfrastructure #preDriverAmplifier #rfpreDriver #smtcomponents #qfnpackage #pcbdesign #hardwaredesign #electronicsengineering #componentlibrary

555 Type, Timer/Oscillator (Single) IC 2.1MHz 8-PDIP The TLC555 is a CMOS monolithic timing circuit. The timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2MHz. Because of a high input impedance, this device supports smaller timing capacitors than those supported by the NE555 or LM555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage. • Very low power consumption: – 1mW typical at VDD = 5V • Capable of operation in astable mode • CMOS output capable of swinging rail to rail • High output current capability – Sink: 100mA typical – Source: 10mA typical • Output fully compatible with CMOS, TTL, and MOS • Low supply current reduces spikes during output transitions • Single-supply operation from 2V to 15V • Functionally interchangeable with the NE555; has same pinout • ESD protection exceeds 1000V per ANSI/ESDA/ JEDEC JS-001 • Available in Q-temp automotive – High-reliability automotive applications – Configuration control and print support – Qualification to automotive standards #CommonPartsLibrary #IntegratedCircuit

25 Hz ~ 20 kHz Analog Microphone MEMS (Silicon) 1.5 V ~ 3.63 V Omnidirectional (-32dB @ 94dB SPL) Solder Pads The ICS-40730 is a high-performance analog MEMS microphone designed for precision audio capture in compact electronic systems. It integrates a micro-electromechanical sensing element with an internal impedance conversion amplifier, providing a stable analog output suitable for direct interfacing with audio processing circuits. The device is optimized for applications requiring high signal integrity, low noise, and consistent performance across a wide frequency range. Its small form factor and surface-mount package make it ideal for space-constrained designs such as portable electronics, embedded systems, and industrial sensing equipment. Key Features Omnidirectional microphone response Low noise floor for high signal clarity Wide dynamic range for accurate sound reproduction Analog output interface Surface-mount package for automated assembly Stable performance over temperature variations Electrical Characteristics Supply voltage range suitable for low-power systems Low current consumption for energy-efficient operation High signal-to-noise ratio enabling clear audio capture Consistent sensitivity across operating conditions Acoustic Performance Omnidirectional pickup pattern Flat frequency response over the audible range High acoustic overload point for handling loud sound sources Low total harmonic distortion Mechanical Characteristics Compact surface-mount package Designed for reflow soldering processes Robust structure for reliable operation in portable devices Environmental Specifications Operational across standard industrial temperature ranges Resistant to typical humidity and environmental conditions encountered in consumer and industrial electronics Applications Voice-enabled devices Audio recording systems Industrial monitoring equipment Smart home and IoT devices Portable and wearable electronics Compliance and Standards Designed to meet common environmental and electronic component compliance requirements for modern electronic assemblies #commonpartslibrary #audio #microphone #analog