Infineon Technologies CY8C29666-24LFXIT

Overview

CY8C29666-24LFXIT from Cypress Semiconductor is a programmable PSoC® System-on-Chip integrating an M8C 8-bit Harvard-architecture CPU (24 MHz max), 16 digital PSoC blocks, 12 analog PSoC blocks, 32 KB flash, 2 KB SRAM, and configurable GPIO with 25 mA sink capability. It operates from 3.0 V to 5.25 V (or down to 1.0 V via on-chip switch-mode pump) across –40 °C to +85 °C, enabling embedded control in industrial sensor nodes and motor drive interfaces.

For engineers reviewing the CY8C29666-24LFXIT datasheet, CY8C29666-24LFXIT pinout, CY8C29666-24LFXIT application, or CY8C29666-24LFXIT equivalent, key selection criteria include its 24 MHz IMO clock accuracy (±2.5%), 14-bit ADC capability, dual UART support, I²C master/slave operation up to 400 kHz, and flexible analog block routing for custom signal conditioning.

Technical Context

The device implements a configurable mixed-signal architecture where digital blocks (organized in rows of four) and analog blocks (in columns of three: one CT + two SC) interconnect via global digital/analog buses. All 16 digital blocks support 8–32-bit PWM, timer, counter, CRC, PRS, and UART/SPI functions, with full GPIO routing flexibility.

Analog resources include up to four 14-bit delta-sigma ADCs, four 9-bit DACs, programmable gain amplifiers (up to 48×), and 2–8-pole filters. The on-chip 1.3 V reference and switch-mode pump enable precision analog operation and single-cell battery compatibility without external regulators.

Key Specifications

Pinout & Package

Package: 48-pin QFP (LQFP-48), 7 mm × 7 mm, 0.5 mm pitch, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C29466-24LFXIT, this part delivers 100% more analog blocks and 100% more digital blocks in the same footprint; versus CY8C29866-24LFXIT, it shares identical resources but may differ in factory-programmed configuration or qualification grade.

Availability

CY8C29666-24LFXIT is available at Aetrix Electronics and suitable for industrial motor control, smart sensor node development, and medical diagnostic instrumentation requiring stable component supply and long-term lifecycle assurance.

Supply support for CY8C29666-24LFXIT 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 high-performance, configurable mixed-signal ICs for embedded control and connectivity applications.

The CY8C29x66 PSoC family targets cost-sensitive, resource-flexible embedded systems needing both analog signal conditioning and digital logic in a single chip-optimized for rapid prototyping and field-upgradable firmware.

FAQ

What development tools are required to program CY8C29666-24LFXIT?

PSoC Designer™ IDE (legacy, Windows-only) is the official toolchain, providing schematic-based user module configuration, automatic code generation, and full-speed ICE debugging. Required hardware includes MiniProg1 or MiniProg3 programmers and CY3210-PSoCEval1 development kit for initial validation. No third-party IDE support exists for this legacy M8C architecture.

Does CY8C29666-24LFXIT support USB or CAN interfaces?

No. This device lacks native USB or CAN transceivers or protocol stacks. Communication is limited to UART, SPI, I²C, and proprietary digital protocols implemented in firmware. External PHYs (e.g., MCP2551 for CAN, CP2102 for USB-to-UART) must be added for those interfaces.

Can the internal 24 MHz oscillator meet timing-critical UART baud rates?

Yes. The ±2.5% accuracy of the internal main oscillator (IMO) supports standard UART baud rates (e.g., 9600, 115200) with less than 2% error margin. For higher precision (e.g., 1 Mbps with <1% error), use the 32.768 kHz crystal with PLL to generate a crystal-referenced 24 MHz clock.

Is EEPROM emulation reliable for frequent write cycles in data logging applications?

Yes. Cypress's flash-based EEPROM emulation uses wear-leveling across dedicated sectors and supports ≥100,000 write cycles per logical address. It includes atomic write routines and power-fail recovery-validated for logging intervals as short as 100 ms in industrial telemetry deployments.