Infineon Technologies CY8C20140-LDX2IT

Overview

CY8C20140-LDX2IT from Infineon Technologies is a capacitive touch-sensing microcontroller based on the PSoC™ 1 architecture, integrating an 8-bit M8C core, on-chip CapSense® analog front-end, and programmable digital logic. It supports up to 14 self-capacitive or 12 mutual-capacitive sensing channels, operates from 2.4–5.25 V, and features 8 KB flash, 512 B SRAM, and hardware-based CapSense® scanning with <10 µA active current at 1 MHz. It is used in industrial HMI panels, appliance control knobs, and consumer electronics requiring robust, low-power touch interfaces.

For engineers reviewing the CY8C20140-LDX2IT datasheet, CY8C20140-LDX2IT pinout, CY8C20140-LDX2IT application, or CY8C20140-LDX2IT equivalent, key selection criteria include its dedicated CapSense® hardware acceleration, integrated voltage regulator, I²C/SPI/UART interface support, and qualification for extended temperature operation (–40°C to +85°C) in space-constrained embedded designs.

Technical Context

The CY8C20140-LDX2IT implements a fixed-function CapSense® block with configurable scan resolution (8–16 bits), automatic baseline tracking, and noise immunity via spread-spectrum modulation and shield driver capability. Its M8C CPU executes instructions at up to 24 MHz and supports interrupt-driven sensor polling with <50 µs response latency per channel.

It integrates a 10-bit SAR ADC for auxiliary analog sensing, a programmable clock system with internal IMO (4–24 MHz) and external crystal support, and configurable GPIOs with slew-rate control and ESD protection (±2 kV HBM). All CapSense® operations are handled autonomously without CPU intervention during scanning.

Key Specifications

Pinout & Package

Package: 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch), thermally enhanced with exposed pad for improved heat dissipation in sealed enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar capacitive touch controller applications.

Compared with CY8C20240-LDX2IT, this part offers tighter board space and lower power at reduced channel count; versus MTCH101-I/ST, it delivers full autonomy and higher noise immunity but requires less host coordination and no external firmware stack.

Availability

CY8C20140-LDX2IT is available at Aetrix Electronics and suitable for industrial HMI panels, home appliance interfaces, and medical device keypads requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY8C20140-LDX2IT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and embedded controllers, with global manufacturing and quality certification to ISO 9001 and IATF 16949.

This device belongs to the legacy PSoC™ 1 family, designed specifically for cost-sensitive, low-power capacitive touch applications where integrated analog front-end and minimal external components reduce total system BOM and layout complexity.

FAQ

What is the maximum recommended overlay thickness for reliable operation?

The CY8C20140-LDX2IT supports up to 8 mm acrylic or 4 mm glass overlay thickness when configured with optimal IDAC current (32–64 µA), shield driver enabled, and baseline update rate set to medium. Thicker overlays require empirical tuning using the CapSense® Tuner tool and validation under worst-case environmental conditions including humidity and temperature extremes.

Does this device support mutual capacitance sensing with diagonal electrode routing?

Yes - the hardware-accelerated CapSense® block supports mutual capacitance with dedicated transmit (TX) and receive (RX) pin assignments. Diagonal routing is supported and recommended to minimize crosstalk; the device's shield driver can be assigned to intermediate traces between TX/RX lines to further improve SNR in high-density layouts.

Can the internal LDO power external circuitry such as LEDs or op-amps?

No - the internal LDO is strictly for internal core and analog block regulation. Its output is not accessible externally, and no current-sinking capability is provided. External loads must be powered from the main VDD rail with appropriate current-limiting and decoupling, as the device's absolute maximum I/O sink/source is 25 mA per pin.

Is there factory-programmed unique identification data stored in this part?

No - the CY8C20140-LDX2IT does not include factory-programmed UID, serial number, or cryptographic key storage. Unique identifiers must be implemented in application firmware using flash-based variables or external secure elements if required for traceability or anti-counterfeiting purposes.