Touchscreen Controller 2 Wire Capacitive I2C Interface 20-VQFN (3x3) The MTCH2120-V/REB specification defines the engineering requirements for a capacitive touch sensing controller integrated circuit designed for human-machine interface applications in embedded electronic systems. This specification establishes the functional, electrical, mechanical, environmental, and quality requirements necessary to ensure accurate touch detection, stable system performance, and reliable operation across consumer, industrial, and embedded environments. The device is intended for use in applications requiring touch-based user input such as control panels, interface buttons, and capacitive sensing surfaces. It provides robust sensing performance with immunity to noise and environmental variation, enabling reliable detection of touch events in compact and low-power electronic designs. Engineering Requirements The integrated circuit shall be manufactured using qualified semiconductor fabrication processes to ensure consistent sensing performance, low power consumption, and long-term operational stability. The device shall support reliable capacitive touch detection under defined electrical and environmental conditions without degradation of sensitivity or accuracy. The sensing architecture shall provide stable touch event detection with immunity to electrical noise, environmental interference, and parasitic capacitance variations. The system shall maintain consistent performance across intended operating conditions including temperature variation and supply voltage fluctuation. Electrical characteristics shall ensure stable digital communication, accurate sensing response, and reliable operation during startup, normal operation, and power transitions. The device shall maintain functional integrity during dynamic system conditions without false triggering or loss of sensitivity. Mechanical and package construction shall be suitable for surface-mount assembly and shall ensure robustness during soldering, handling, and long-term operation. Workmanship shall be free from defects such as contamination, cracks, bonding issues, or structural inconsistencies that could impact electrical or mechanical reliability. Inspection, validation, and testing shall be performed using controlled procedures and calibrated equipment to ensure compliance with all applicable engineering and quality requirements. Any deviation from this specification shall require formal engineering review, documented justification, and approval through established change control processes. Documentation Supporting documentation shall include official datasheets, reference design materials, electrical characterization reports, qualification data, inspection records, and revision-controlled manufacturing documentation. All documentation shall be maintained under formal configuration management and quality assurance systems to ensure traceability and consistency. Revision Control All modifications to this specification shall be managed through formal engineering change control procedures. Each revision shall undergo technical evaluation, validation, and approval prior to implementation to ensure continued compliance with design intent and applicable standards. #EngineeringSpecification #CapacitiveTouch #HMI #MicrochipTechnology #EmbeddedSystems #UserInterface #SensorIC #LowPowerDesign #ElectronicsDesign #QualityAssurance #EngineeringDocumentation

11 Position Connector Header, Center Strip Contacts Surface Mount Gold or Gold, GXT™ The 91911-31311LF is a 1.00 mm pitch board-to-board mezzanine connector from the Conan™ / MezzSelect™ series by Amphenol ICC. It is designed for compact, high-density PCB stacking applications commonly used in industrial, embedded, networking, and portable electronic systems. Key Features 11-position vertical header 1.00 mm pitch compact board-to-board connector Surface-mount (SMT) mounting 5 mm mated stacking height Gold/GXT™ contact plating for reliable signal integrity and durability Board guide and solder retention features for easier assembly and improved mechanical stability Supports high-density PCB layouts Designed for industrial and embedded applications RoHS and REACH compliant Housing material: LCP (Liquid Crystal Polymer) Rated up to 1 A current and 500 V voltage Typical Applications Embedded computing modules Industrial control systems Networking equipment Portable electronics Compact PCB stacking designs

8 Position Connector Receptacle, Center Strip Contacts Surface Mount Gold The TE Connectivity part 2386586-1 is a fine-pitch board-to-board (BTB) PCB receptacle connector designed for compact, high-density electronic devices. It is a vertical surface-mount connector with 8 positions and a 0.4 mm pitch, commonly used in portable electronics, embedded systems, and space-constrained PCB designs. Key Features Connector Type: PCB mount receptacle Connector System: Board-to-board (BTB) Positions: 8-pin Pitch: 0.4 mm fine pitch Rows: 2 Mounting Style: Surface mount (SMT) Orientation: Vertical Stack Height: 0.8 mm low-profile design Contact Plating: Gold (Au) Contact Material: Copper alloy Rated Current: 0.5 A max per contact Operating Voltage: 60 VDC Temperature Range: −40 °C to +85 °C Housing Material: High-temperature thermoplastic Application: Signal transmission in compact electronics Packaging: Tape & Reel for automated assembly This connector is optimized for: Compact embedded systems Wearables and handheld devices High-density PCB stacking Consumer electronics Low-profile modular designs

Buck Switching Regulator IC Positive Fixed 5V 1 Output 1A SOT-23-6 The LMR50410Y5FQDBVRQ1 (part of the LMR50410-Q1 family from Texas Instruments) is a synchronous step-down (buck) DC-DC converter designed for automotive and industrial power applications. It operates over a wide input voltage range of 4 V to 36 V and can deliver up to 1 A output current, making it suitable for converting higher, unregulated voltages into stable lower voltages (e.g., 5 V or 3.3 V rails). The device integrates power switches, control circuitry, and compensation internally, allowing simple design with minimal external components and a compact PCB footprint. Key Features Power & Performance Wide input voltage range: 4 V to 36 V Output current: up to 1 A High switching frequency: 2.1 MHz (enables small inductors) High efficiency with PFM (light load) and FPWM (constant frequency) options Integration & Ease of Use Synchronous rectification (integrated high-side & low-side MOSFETs) Internal compensation (no complex external tuning) Minimal external components required Small SOT-23-6 package for compact designs Protection & Reliability Cycle-by-cycle current limit Short-circuit protection (hiccup mode) Thermal shutdown protection Undervoltage lockout (UVLO) ±1% reference voltage accuracy Automotive & Industrial Capability AEC-Q100 qualified (automotive grade) Operating temperature: Ambient: up to 125°C Junction: up to 150°C Designed for rugged automotive environments Additional Features Soft-start for controlled startup Precision enable pin for system control Monotonic startup with pre-biased output Available in fixed output (e.g., 5 V) variants Typical Applications Automotive electronics (ADAS, infotainment, lighting) Industrial power supplies Distributed power systems General-purpose DC-DC regulation #commonpartslibrary #integratedcircuit #powermanagement #voltageregulator

7.2VA Power Transformer 3.3V Primary 6V Secondary Chassis Mount The DA2304-ALD is a compact surface-mount isolation power transformer manufactured by Coilcraft. It is designed primarily for low-voltage DC/DC converter applications, especially in circuits that require galvanic isolation. It is commonly used together with ICs like isolated power drivers (e.g., SN6501) to generate isolated power rails. Type: Isolation / power transformer Mounting: Surface-mount (SMT) Primary Voltage: 3.3 V Secondary Voltage: 6 V (typical) Power Rating: ~7.2 W Turns Ratio: 1 : 2.2 Isolation Voltage: up to 2500 Vrms Windings: Dual primary and dual secondary Core Material: Ferrite Operating Temp: −40°C to +125°C Isolated DC/DC converters Industrial communication interfaces (RS-485, CAN, etc.) Medical or safety-isolated systems Powering isolated gate drivers or transceivers Small footprint (~10 × 8 mm, low profile ~6 mm) #Transformer