Infineon Technologies CY8C24794-24LFXIT

Overview

CY8C24794-24LFXIT from Cypress Semiconductor is a programmable mixed-signal system-on-chip (SoC) integrating an M8C 8-bit Harvard architecture CPU, 4 digital PSoC blocks, 6 analog PSoC blocks, and a full-speed USB 2.0 interface (12 Mbps) with dedicated 256-byte buffer and ±0.25% IMO accuracy-enabling self-timed USB without external crystal. It operates from 3.0–5.25 V across -40°C to +85°C industrial range and supports capacitive sensing, motor control, and USB-connected human interface devices.

For engineers reviewing the CY8C24794-24LFXIT datasheet, CY8C24794-24LFXIT pinout, CY8C24794-24LFXIT application, or CY8C24794-24LFXIT equivalent, key selection criteria include on-chip USB timing compliance, configurable analog block count (6), digital block count (4), 16 KB Flash/1 KB SRAM memory map, and GPIO drive capability (25 mA sink, 33 mA analog output).

Technical Context

The device implements a unified PSoC architecture with global digital and analog interconnects, enabling dynamic routing of signals between M8C core, digital blocks (timers, PWMs, UART, SPI, I²C), and analog blocks (ADCs up to 14-bit, DACs up to 9-bit, PGAs, filters). All resources-including USB endpoint controller and decimator-are accessible via shared buses and programmable multiplexers.

USB functionality is hardware-accelerated with four uni-directional endpoints plus one bi-directional control endpoint, supported by internal 24/48 MHz IMO tuned to ±0.25% for USB timing; analog subsystem includes rail-to-rail CT and SC blocks with 48 configurable analog inputs and two 33 mA analog outputs routed through GPIO.

Key Specifications

Pinout & Package

Package: 68-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C24423A-24LFXI, CY8C24794-24LFXIT adds full-speed USB with crystal-less operation and doubles Flash/SRAM; versus STM32F072CBT6, it trades ARM ecosystem advantages for on-the-fly analog/digital peripheral reconfiguration-ideal for rapid iteration of sensor interface topologies.

Availability

CY8C24794-24LFXIT is available at Aetrix Electronics and suitable for industrial HMI panels, USB-capacitive touch controllers, programmable USB peripherals, and low-power sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for CY8C24794-24LFXIT 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) is a fabless semiconductor company specializing in programmable embedded solutions, USB controllers, and mixed-signal SoCs for industrial, automotive, and consumer markets.

CY8C24794 belongs to the PSoC 1 family-a line of configurable mixed-signal arrays designed to replace MCU-plus-peripheral combinations with a single chip offering hardware-programmable analog and digital resources alongside USB connectivity.

FAQ

Does CY8C24794-24LFXIT require an external crystal for USB operation?

No. The device uses an internal main oscillator (IMO) that self-tunes to ±0.25% accuracy for full-speed USB compliance. Only two 27 Ω series resistors on D+/D− lines are required-no external crystal, capacitor, or PLL components are needed for basic USB functionality.

Can all 50 GPIO pins be used simultaneously as analog inputs?

Yes-up to 48 GPIO pins across Ports 0–5 can be routed to the analog mux bus for simultaneous sampling, though only two analog outputs (33 mA each) are available. The analog system supports time-multiplexed acquisition across all 48 inputs using configurable sequencers and DMA-like transfers to SRAM.

What development tools are required to program CY8C24794-24LFXIT?

PSoC Designer IDE (discontinued but fully supported for PSoC 1) is mandatory-it provides graphical user module configuration, automatic code generation, and ISSP programming. Hardware debugging requires a MiniProg1 or compatible programmer; no third-party toolchains support the M8C core or PSoC block routing.

Is CY8C24794-24LFXIT qualified for automotive applications?

No. It is specified for industrial temperature range (-40°C to +85°C) but lacks AEC-Q100 qualification, automotive-grade screening, or extended USB temperature support beyond -10°C to +85°C. For automotive use, consider Infineon's PSoC 4 or AURIX™ families with formal automotive certification.