Infineon Technologies CY8C29866-24AXIT

Overview

CY8C29866-24AXIT from Infineon Technologies (formerly Cypress Semiconductor) is a PSoC® 1 programmable system-on-chip featuring an M8C 8-bit Harvard-architecture CPU running at up to 24 MHz, 32 KB flash, 2 KB SRAM, and integrated analog/digital configurable blocks. It operates from 3.0 V to 5.25 V (or down to 1.0 V with on-chip switch-mode pump), supports industrial temperature range (–40 °C to +85 °C), and targets embedded control applications requiring mixed-signal integration, such as motor control interfaces and sensor signal conditioning.

For engineers reviewing the CY8C29866-24AXIT datasheet, CY8C29866-24AXIT pinout, CY8C29866-24AXIT application, or CY8C29866-24AXIT equivalent, this device offers verified programmable analog blocks (12-channel), digital blocks (16-channel), I²C/SPI/UART peripherals, and flexible GPIO drive modes - all critical for rapid prototyping of custom mixed-signal embedded systems without external component proliferation.

Technical Context

The CY8C29866-24AXIT implements a fixed-function M8C core with interrupt controller (17 vectors), sleep/watchdog timers, and multiple clock sources including ±5% internal main oscillator (IMO) at 24/48 MHz, 32.768 kHz ECO for RTC, and ILO for low-power timing. Its global interconnect architecture routes signals between 12 analog and 16 digital PSoC blocks, enabling user-defined peripherals like ADCs (up to 14-bit), DACs (up to 9-bit), PWMs (8-/16-bit), and UARTs (up to four full-duplex).

Analog resources include programmable gain amplifiers (PGAs), comparators, and switched-capacitor filters; digital resources support CRC, PRS, and configurable timers/counters. All GPIOs support eight drive modes (pull-up/down, high-Z, strong, open-drain), 25-mA sink/10-mA source capability, and configurable interrupts - enabling direct interface with sensors, actuators, and communication buses.

Key Specifications

Pinout & Package

Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal controller applications.

Compared with CY8C29466-24AXI and CY8C29666-24AXI, the CY8C29866-24AXIT provides maximum analog/digital resource density in a 48-pin footprint - critical for designs needing simultaneous high-resolution ADC, DAC, PWM, and multi-protocol communication without external glue logic.

Availability

CY8C29866-24AXIT is available at Aetrix Electronics and suitable for motor control interfaces, sensor signal conditioning, capacitive touch panels, and smart power supply monitors requiring stable component supply across extended industrial temperature ranges and long production lifecycles.

Supply support for CY8C29866-24AXIT 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical support, and long-term supply commitment for the PSoC® portfolio.

The CY8C29x66 series belongs to the PSoC 1 family - designed specifically for cost-sensitive, low-to-mid complexity embedded systems requiring integrated analog and digital programmability in a single chip, with emphasis on rapid development and minimal external component count.

FAQ

What is the maximum operating frequency of the M8C core in CY8C29866-24AXIT?

The M8C CPU core operates at up to 24 MHz, delivering 4 million instructions per second (MIPS). This frequency is achieved using the internal main oscillator (IMO) or a 24 MHz external crystal; the IMO is factory-trimmed to ±5% accuracy over the full industrial temperature range (–40 °C to +85 °C).

Does CY8C29866-24AXIT support true hardware UART with FIFO or DMA?

No. The device implements UART functionality in firmware using digital PSoC blocks and CPU resources. It supports full-duplex operation with selectable parity and baud rates up to 115.2 kbps, but lacks dedicated UART hardware with FIFO or DMA - requiring CPU polling or interrupt-driven byte handling.

Can the on-chip switch-mode pump (SMP) power analog blocks during ultra-low-voltage operation?

Yes. The SMP generates an internal regulated voltage (VDDA) from VDD down to 1.0 V, enabling analog blocks (ADC, PGA, comparator) to operate with specified performance even when main supply drops below 3.0 V - critical for battery-powered applications with brown-out resilience requirements.

Is there hardware support for USB connectivity on CY8C29866-24AXIT?

No. The CY8C29866-24AXIT does not include USB transceivers or physical layer circuitry. USB communication must be implemented externally using a bridge IC (e.g., CP2102) or omitted entirely; supported on-chip interfaces are I²C, SPI, and UART only.