Infineon Technologies CY8CTST110-00PVXI

Overview

CY8CTST110-00PVXI from Cypress Semiconductor is a TrueTouch™ single-touch capacitive touchscreen controller IC with M8C 8-bit Harvard architecture processor (24 MHz), 8 KB Flash, 512 B SRAM, and support for up to 24 X/Y sensor inputs in a 32-pin QFN package. It delivers 0.5 ms typical scan time per sensor, 4 mA average supply current at 8 ms report rate, and operates from 2.7 V to 5.25 V across –40°C to +85°C for embedded human interface applications in compact displays ≤4.3".

For engineers reviewing the CY8CTST110-00PVXI datasheet, CY8CTST110-00PVXI pinout, CY8CTST110-00PVXI application, or CY8CTST110-00PVXI equivalent, key selection criteria include single-touch scan latency, I²C master/slave interface timing, GPIO drive strength (25 mA sink), analog mux routing for capacitive sensing, and ISSP™ in-system programming capability.

Technical Context

The CY8CTST110 integrates a dedicated TrueTouch analog sensing block with configurable digital PSoC blocks, enabling hardware-accelerated capacitive measurement and real-time touch coordinate calculation. Its analog system includes an 8:1 analog multiplexer bus, dual comparators with 1.3 V reference, and support for up to 8 analog inputs on GPIO.

Digital resources comprise four 8-bit programmable digital blocks supporting PWM, timers, UART, SPI, and I²C (up to 400 kHz) - all routed via global interconnect buses to any of 28 GPIO. The M8C core executes firmware in Flash while managing sleep/wake cycles, watchdog, and low-voltage detection.

Key Specifications

Pinout & Package

Package: 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch), exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-touch capacitive sensing applications.

Compared with CY8CTST120-00PVXI and CY8CTMG110-00PVXI, the CY8CTST110-00PVXI provides optimal cost and power efficiency for fixed single-touch applications where electrode count and memory footprint are constrained - avoiding over-specification while maintaining full ISSP™ and analog mux flexibility.

Availability

CY8CTST110-00PVXI is available at Aetrix Electronics and suitable for industrial HMI panels, medical device touchscreens, consumer portable media players, and automotive infotainment controls requiring stable component supply and long-term lifecycle support.

Supply support for CY8CTST110-00PVXI 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 flexibility and system integration.

The CY8CTST110 belongs to the TrueTouch™ family - engineered specifically for cost-sensitive, single-touch capacitive user interfaces in space-constrained devices with emphasis on scan speed, EMI resilience, and field-programmability.

FAQ

What is the maximum supported touchscreen size for CY8CTST110-00PVXI?

The CY8CTST110-00PVXI is specified for touchscreen panels up to 4.3 inches diagonal, based on its 24-electrode limit and analog front-end performance. Larger screens require more electrodes or higher scan resolution, which exceed this device's sensing architecture and are addressed by CY8CTST120 or CY8CTMG120 variants.

Does CY8CTST110-00PVXI support I²C multi-master operation?

Yes, the integrated I²C module supports master, slave, and multi-master modes up to 400 kHz. This allows the CY8CTST110 to act as both a peripheral responding to a host MCU and as a bus controller coordinating multiple I²C slaves - useful in systems with distributed sensors or displays.

Can the CY8CTST110-00PVXI perform analog-to-digital conversion independently of touch sensing?

Yes - its four analog PSoC blocks support standalone 8-bit ADC functionality with selectable references (1.3 V internal or DAC output). These can be configured for non-touch tasks such as battery voltage monitoring or ambient light sensing without interfering with the TrueTouch scanning engine.

Is in-system programming supported without external debug hardware?

Yes - In-System Serial Programming (ISSP™) uses only two pins (SCLK and SDATA) and requires no JTAG or SWD adapter. Firmware updates can be performed in the final product using a simple microcontroller-based programmer or host MCU, enabling field calibration and feature upgrades.