Infineon Technologies CY8C20236A-24LKXAT

Overview

CY8C20236A-24LKXAT from Cypress Semiconductor is an AEC-Q100 qualified automotive-grade PSoC® mixed-signal controller featuring a 24 MHz M8C Harvard-architecture CPU, 8 KB flash/1 KB SRAM, and integrated CapSense® capacitive sensing block supporting up to 33 sensing inputs. It operates from 1.71 V to 5.5 V across –40 °C to +85 °C and delivers low-power touch interface functionality for vehicle control panels and proximity-sensing human-machine interfaces.

For engineers reviewing the CY8C20236A-24LKXAT datasheet, CY8C20236A-24LKXAT pinout, CY8C20236A-24LKXAT application, or CY8C20236A-24LKXAT equivalent, key selection criteria include AEC-Q100 qualification, SmartSense™ auto-tuning support, I²C slave (up to 400 kHz), configurable GPIO drive strength (25 mA sink per pin), and internal 6/12/24 MHz IMO with ±5% accuracy.

Technical Context

The device integrates a dedicated CapSense analog subsystem with hardware-accelerated scanning logic, internal 1.0 V/1.2 V analog reference, and global analog mux bus enabling simultaneous connection of any GPIO to the comparator or ADC. Its M8C core executes at up to 24 MHz with interrupt controller, sleep/wake timers, and ISSP capability.

System resources include three 16-bit programmable timers, dual-mode I²C slave (50/100/400 kHz) with hardware address validation and <100 µA sleep-mode operation, SPI master/slave (46.9 kHz–12 MHz), and an 8–10-bit incremental ADC with internal voltage reference - all coordinated via a unified system bus architecture.

Key Specifications

Pinout & Package

Package: 16-pin QFN (3 × 3 × 0.6 mm), no exposed pad. Pinout validated per Cypress Document 001-63115 Rev. *D, pages 7–8.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6 and MAX11802ETL+, the CY8C20236A-24LKXAT delivers integrated AEC-Q100-qualified CapSense functionality with zero external components, deterministic scan timing, and production-ready SmartSense tuning - reducing time-to-market for automotive touch interfaces by eliminating iterative hardware/firmware co-design cycles.

Availability

CY8C20236A-24LKXAT is available at Aetrix Electronics and suitable for automotive dashboard controls, center console touch interfaces, steering wheel proximity sensors, and door handle touch activation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY8C20236A-24LKXAT 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

Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, sensing, and connectivity applications with focus on automotive, industrial, and consumer markets.

The CY8C20x36A product line delivers automotive-qualified PSoC devices optimized for capacitive touch HMI in safety-critical and EMI-challenged environments - combining configurable analog blocks, CapSense hardware acceleration, and AEC-Q100 compliance in compact QFN packages.

FAQ

Is CY8C20236A-24LKXAT qualified for automotive use?

Yes. The device is certified to AEC-Q100 Grade 2 (–40 °C to +105 °C ambient), with full qualification testing including HTOL, TC, and ESD per JESD22-A114. Its operating range is specified from –40 °C to +85 °C junction temperature, meeting requirements for interior automotive applications such as dashboards and center consoles.

Does it support I²C communication in deep-sleep mode?

Yes. The I²C slave interface remains active during sleep modes with typical current consumption below 100 µA. Hardware address validation ensures the CPU stays asleep until a packet addressed to the device is received, minimizing power while maintaining host responsiveness.

What is the maximum number of CapSense electrodes supported?

The device supports up to 33 capacitive sensing inputs, derived from its 36 GPIOs minus two reserved for I²C (SCL/SDA) and one for the external modulator capacitor. All sensing channels are scanned in hardware without CPU intervention, enabling consistent 100 Hz+ update rates.

Can it operate without an external crystal?

Yes. The internal main oscillator (IMO) provides 6/12/24 MHz clocking with ±5% accuracy, sufficient for CapSense scanning and most system timing needs. An external crystal is optional and used only when higher frequency stability (e.g., for precise UART baud rates) is required.