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

Connector Header Through Hole 6 position 0.100" (2.54mm) The 640456-6 is a 6-position, single-row wire-to-board header connector from TE Connectivity (AMP series), designed for reliable power and signal connections in a wide range of electronic applications. It features a 2.54 mm pitch and through-hole mounting for strong mechanical retention and ease of assembly. The connector is commonly used with matching crimp housings and terminals, providing a secure and serviceable interconnect solution for PCB-based systems. Key Features 6-position (1x6) header connector 2.54 mm pitch spacing Through-hole mounting (THT) Vertical (top-entry) orientation Friction-lock compatible with mating housings Tin-plated contacts for good conductivity and corrosion resistance Durable thermoplastic housing Mechanical Characteristics Mounting Type: Through Hole Orientation: Vertical (Top Entry) Pitch: 2.54 mm Number of Positions: 6 Row Configuration: Single row Mating Type: Friction fit with compatible housing Termination Type: Solder tails Electrical Characteristics Rated Current: Up to 3 A per contact (depending on wire gauge) Rated Voltage: 250 V AC/DC Contact Resistance: ≤ 20 mΩ (initial) Insulation Resistance: ≥ 1,000 MΩ Dielectric Withstanding Voltage: 1,000 VAC Material Specifications Housing: Thermoplastic, UL94V-0 rated Contacts: Copper alloy Contact Plating: Tin over nickel Environmental Specifications Operating Temperature Range: -40°C to +105°C Storage Temperature: -40°C to +105°C Packaging Information Packaging Type: Bulk or tray (varies by supplier) RoHS Compliant: Yes Lead-Free: Yes Compatible Components Mating Housing: TE Connectivity compatible crimp housings (e.g., AMP series) Crimp Terminals: соответствующие crimp contacts for 2.54 mm systems Typical Applications PCB interconnects Consumer electronics Industrial control systems Power and signal distribution Prototyping and development boards #CommonPartsLibrary #Connector #Header #Male-pins #MTA-100

Connector Header Through Hole 4 position 0.100" (2.54mm) UART header 1x4 2.54mm Single-row, through-hole male pin header with 4 positions and 2.54 mm pitch. Designed for board-to-wire or board-to-board interconnect applications such as UART interfaces. Mechanical Specifications Number of Positions: 4 Number of Rows: 1 Pitch: 2.54 mm (0.100") Mounting Style: Through Hole Mounting Angle: Straight (Vertical) Contact Gender: Male (Pin) Termination Type: Solder Pin Housing Material: Polybutylene Terephthalate (PBT) Housing Color: Black Electrical Specifications Current Rating: 4.3 A – 6.3 A (per pin, depending on conditions) Voltage Rating: 450 VAC – 550 VAC Contact Resistance: (Typical for series, not specified exact) Insulation Resistance: (Not specified) Material & Plating Contact Material: Phosphor Bronze Contact Plating: Gold Flammability Rating: UL94 V-0 Environmental & Compliance RoHS Compliance: Yes Country of Origin: USA Packaging Packaging Type: Bulk Factory Pack Quantity: 1 Series Information Series: TSW (Samtec Pin Strip Header Series) Product Type: Headers & Wire Housings Typical Applications UART / Serial communication headers Microcontroller programming interfaces General-purpose 2.54 mm interconnects Prototyping and development boards #commonpartslibrary #connector

300mA Low-dropout Voltage Regulator, Vout 3.3V, Vin up to 5.5V, SOT-23 MIC5504 low-dropout linear voltage regulator, 2.5V to 5.5V input, fixed 1.0V to 3.3V output, 300mA output current, ±2% accuracy, 38µA quiescent current, 160mV dropout at 300mA, thermal shutdown and current-limit protection, 1x1mm Thin DFN or SOT-23 package.

1.5A USB-Friendly Li-Ion Battery Charger and Power-Path Management IC with 4.2 VBAT The BQ24075TRGTR (from Texas Instruments) is a highly integrated single-cell Li-Ion / Li-Polymer linear battery charger IC with power-path management. It is designed for portable and space-constrained applications, allowing a device to be powered from a USB port or AC adapter while simultaneously charging the battery. The device integrates charging control, power-path management, and safety features into a compact package. A key feature is its Dynamic Power Path Management (DPPM), which ensures the system is powered even when the battery is low or absent, while intelligently managing charging current. Key Features Battery Charging Supports single-cell Li-Ion / Li-Polymer batteries Up to 1.5 A programmable charge current Three-phase charging: Pre-charge (conditioning) Constant current Constant voltage Fixed 4.2 V charge voltage Power Path Management Dynamic Power Path Management (DPPM): Powers system and charges battery simultaneously Prioritizes system load over charging Allows system operation even with: Deeply discharged battery No battery connected Input & Power Features Operates from: USB input (100 mA / 500 mA selectable) AC adapter Programmable input current limit up to 1.5 A Input voltage range: ~4.35 V to 6.4 V (28 V max rating) Input dynamic power management (VIN-DPM) prevents source overload Protection & Safety Thermal regulation and shutdown Over-voltage protection (OVP) Short-circuit and reverse current protection Battery temperature monitoring (NTC thermistor input) Battery disconnect (SYSOFF) feature Control & Status Standalone operation (no MCU required, resistor-programmable) Charge status outputs: Charging Charge complete Power good Physical Characteristics Package: 16-pin VQFN (3 mm × 3 mm) Operating temperature: –40°C to +85°C #commonpartslibrary #integratedcircuit #powermanagement #batterycharger