Infineon Technologies CY8C20466AS-24LQXI

Overview

CY8C20466AS-24LQXI from Cypress Semiconductor is a haptics-enabled CapSense® programmable mixed-signal controller featuring an M8C 8-bit Harvard-architecture CPU (up to 24 MHz), 16 KB flash / 2 KB SRAM, integrated Immersion TS2000 ERM haptics driver, and configurable capacitive sensing for up to 28 GPIOs. It operates from 1.71 V to 5.5 V across –40 °C to +85 °C and supports I²C slave (up to 400 kHz), SPI master/slave, and three 16-bit timers - deployed in human-interface consumer electronics requiring touch + tactile feedback.

For engineers reviewing the CY8C20466AS-24LQXI datasheet, CY8C20466AS-24LQXI pinout, CY8C20466AS-24LQXI application, or CY8C20466AS-24LQXI equivalent, key selection criteria include CapSense scan resolution, haptics effect count (14 preloaded), GPIO sink/source drive capability (120 mA total sink, 20 mA total source), and QFN-24 package compatibility with 4 × 4 mm footprint.

Technical Context

The device integrates a dedicated CapSense analog block with hardware-accelerated scanning logic, internal 1-V/1.2-V analog reference, and SmartSense™ auto-tuning - enabling robust capacitive sensing without external components or manual calibration. Its analog mux bus connects all GPIOs to the CapSense comparator and ADC, supporting sliders, touchpads, and proximity detection via configurable IDAC-based charge-transfer measurement.

Haptics control is implemented via a dedicated TS2000-compatible engine driving ERM actuators with 14 built-in waveforms and selectable drive profiles. Clocking combines a ±5% 6/12/24 MHz IMO, 32-kHz ILO for sleep timing, and optional precision 32-kHz crystal input - enabling low-power active sensing and synchronized haptic response.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 × 4 × 0.6 mm), lead-free, RoHS-compliant, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F072CBT6 and ATtiny1616-MFR, CY8C20466AS-24LQXI delivers turnkey CapSense + haptics integration with hardware acceleration, reducing firmware development time by ~60% and eliminating two external ICs - critical for rapid prototyping and volume production of touch-enabled consumer devices.

Availability

CY8C20466AS-24LQXI is available at Aetrix Electronics and suitable for smartphone front panels, wearable touch interfaces, industrial control panels, and home appliance keypads requiring stable component supply and long-term lifecycle support.

Supply support for CY8C20466AS-24LQXI 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 human-interface and system-control applications, with focus on integration, low power, and ease of use.

CY8C20466AS-24LQXI belongs to the PSoC® 1 CapSense family, engineered specifically to consolidate capacitive touch sensing, haptics control, and microcontroller functions into a single chip for compact, cost-sensitive consumer and industrial UIs.

FAQ

What is the maximum number of simultaneous CapSense electrodes supported?

CY8C20466AS-24LQXI supports up to 28 GPIOs configurable as CapSense inputs. All 28 can be scanned in sequence using hardware-accelerated scanning logic; concurrent multi-electrode measurement is not supported, but sequential scan time for full 28-electrode array is under 15 ms at 24 MHz CPU speed with default settings.

Does this device support I²C master mode?

No. The CY8C20466AS-24LQXI implements I²C only as a slave device, supporting standard-mode (100 kHz) and fast-mode (400 kHz) operation with hardware address recognition. It does not include I²C master logic; external master (e.g., application processor) must initiate all transactions.

Can the haptics engine drive linear resonant actuators (LRAs)?

No. The integrated TS2000-compatible haptics controller is designed exclusively for eccentric rotating mass (ERM) actuators. It lacks the high-voltage, phase-controlled drive circuitry required for LRA operation. ERM drivers require only DC bias and PWM modulation - which this device provides natively.

Is SmartSense™ tuning data stored in nonvolatile memory?

Yes. SmartSense™ automatically calculates and stores optimal CapSense parameters (baseline, thresholds, IDAC values) in dedicated flash memory sectors during runtime calibration. These values persist across power cycles and are retained through ISSP firmware updates unless explicitly overwritten by new calibration.