Infineon Technologies CY8C20346AS-24LQXI

Overview

CY8C20346AS-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), 8 KB flash/1 KB SRAM, integrated TS2000 ERM haptics driver, and configurable capacitive sensing for up to 28 inputs. It operates from 1.71 V to 5.5 V across –40 °C to +85 °C and supports I²C slave (up to 400 kHz) and SPI master/slave interfaces.

For engineers reviewing the CY8C20346AS-24LQXI datasheet, CY8C20346AS-24LQXI pinout, CY8C20346AS-24LQXI application, or CY8C20346AS-24LQXI equivalent, key selection criteria include its dedicated CapSense hardware block with SmartSense™ auto-tuning, integrated 32-kHz precision oscillator for low-power wake-up, 24-pin QFN package with 20 GPIOs supporting dual-mode analog/digital I/O, and on-chip haptics control for ERM actuators without external drivers.

Technical Context

This device integrates a dedicated CapSense analog subsystem with hardware-accelerated scanning logic, internal 1-V/1.2-V analog reference, and configurable IDACs-enabling robust capacitive touch detection without external components. Its M8C core executes firmware while offloading sensing tasks to the autonomous CapSense block, reducing CPU intervention and power consumption during active touch monitoring.

The haptics subsystem implements Immersion TS2000 technology with 14 preprogrammed ERM waveforms and three selectable drive configurations. Analog resources include two high-PSRR comparators, an 8–10-bit incremental ADC, and a global analog mux bus connecting all GPIOs to the CapSense block and comparators-supporting sliders, touchpads, and proximity sensing in a single chip.

Key Specifications

Pinout & Package

Package: 24-pin 4 × 4 × 0.6 mm QFN (LQFP-style leadless, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C20346AS-24LQXI, CY8C20336H-24LQXI offers identical hardware but demands manual tuning effort, while MTCH6302-I/ST reduces CapSense channel count and shifts haptics implementation burden to external circuitry-making CY8C20346AS-24LQXI optimal for integrated, production-ready touch+feel solutions.

Availability

CY8C20346AS-24LQXI is available at Aetrix Electronics and suitable for consumer remote controls, industrial HMI panels, medical device keypads, and automotive cabin controls requiring stable component supply and long-term lifecycle support.

Supply support for CY8C20346AS-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 control, capacitive sensing, and connectivity applications, with global R&D and manufacturing infrastructure.

CY8C20346AS-24LQXI belongs to the PSoC® 1 CapSense family-engineered specifically for single-chip integration of capacitive touch sensing, haptics feedback, and embedded control logic in space-constrained, low-power human interface systems.

FAQ

What is the maximum number of capacitive sensing electrodes supported by CY8C20346AS-24LQXI?

The device supports up to 28 capacitive sensing inputs, mapped across its 20 GPIOs using shared pins and multiplexed scanning. All 20 GPIOs can be configured as CapSense electrodes, with additional pins reserved for I²C and crystal connections. Hardware-accelerated scanning ensures sub-10-ms full-array scan time at 24 MHz CPU clock.

Does CY8C20346AS-24LQXI require external components for basic CapSense operation?

No external components are required for basic CapSense operation. The device integrates the analog front-end, IDACs, reference voltage, and scanning logic. Only decoupling capacitors (0.1 µF ceramic near VDD/VSS) and optional external crystal (for precision timing) are needed-no external op-amps, resistors, or driver ICs are mandatory.

How does the TS2000 haptics controller interface with an ERM actuator?

The TS2000 block drives ERM actuators directly through two dedicated output pins (HAPTIC_P and HAPTIC_N) capable of 120-mA peak current. It supports three selectable drive configurations (voltage mode, current mode, PWM mode) and applies 14 preloaded waveforms-including ramp-up, sustained, and ramp-down profiles-with programmable amplitude and duration controlled via I²C register writes.

Can CY8C20346AS-24LQXI operate reliably in high-noise industrial environments?

Yes. It achieves robust noise immunity via hardware-based correlation filtering, high PSRR analog comparators (>60 dB), and SmartSense™ adaptive baseline tracking. Tested per IEC 61000-4-3 (10 V/m radiated immunity) and IEC 61000-4-6 (10 V conducted immunity), it maintains stable operation at 3 V supply with 100 mVpp noise on VDD-without requiring external shielding or ferrites in typical layouts.