Infineon Technologies CY8C24794-24LTXI

Overview

CY8C24794-24LTXI from Cypress Semiconductor is a programmable System-on-Chip (PSoC) integrating an M8C 8-bit Harvard-architecture CPU, six analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), four digital PSoC blocks (including UART, SPI, PWM, CRC), and full-speed USB 2.0 (12 Mbps) with dedicated 256-byte buffer - all operating from 3.0 V to 5.25 V across –40 °C to +85 °C industrial temperature range. It targets embedded capacitive sensing, human interface, and mixed-signal control applications.

For engineers reviewing the CY8C24794-24LTXI datasheet, CY8C24794-24LTXI pinout, CY8C24794-24LTXI application, or CY8C24794-24LTXI equivalent, key selection criteria include on-chip USB compliance without external crystal, configurable analog/digital blocks for CSA (Capacitive Sensing Application), ISSP support via XRES, 16 KB flash/1 KB SRAM memory partitioning, and GPIO drive strength (25 mA sink / 10 mA source).

Technical Context

The CY8C24794-24LTXI implements a fixed-function M8C core with 24 MHz maximum clock speed and two 8×8 multipliers with 32-bit accumulate capability, enabling real-time sensor signal processing in low-power embedded systems. Its analog system includes six rail-to-rail PSoC blocks supporting simultaneous high-resolution ADC conversion (up to 14-bit effective resolution with decimator), PGA gain configuration, and comparator-based event triggering.

Digital resources comprise four programmable digital blocks supporting flexible timer/PWM generation (8–32 bit), full-duplex UART, multiple SPI masters/slaves, and CRC/PRS modules - all interconnected via global digital and analog interconnect buses. USB functionality uses an internal oscillator trimmed to ±0.25% accuracy, eliminating need for external crystal while maintaining USB 2.0 compliance.

Key Specifications

Pinout & Package

Package: 56-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free, 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 CY8C24894-24LTXI and CY8C24994-24LTXI, the CY8C24794-24LTXI offers identical mixed-signal capability and USB performance but omits dedicated XRES routing and on-chip debug - making it optimal for cost-sensitive, high-volume HMI deployments where ISSP is optional and debug occurs pre-production.

Availability

CY8C24794-24LTXI is available at Aetrix Electronics and suitable for industrial HMI, USB touch controllers, automotive cabin interfaces, and smart appliance sensor hubs requiring stable component supply and long-term manufacturability.

Supply support for CY8C24794-24LTXI 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 and digital ICs for embedded control, sensing, and connectivity applications.

The CY8C24x94 product line delivers PSoC-based programmable system-on-chip solutions optimized for capacitive sensing, USB-HID interfaces, and low-power industrial control - combining analog/digital reconfigurability with on-chip memory and timing resources.

FAQ

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

No. The device integrates an internal main oscillator (IMO) trimmed to ±0.25% accuracy, fully compliant with USB 2.0 full-speed timing requirements. External crystal is optional and only needed if higher precision timing is required for non-USB functions.

How many analog inputs can be used simultaneously on CY8C24794-24LTXI?

Up to 48 GPIO pins can be configured as analog inputs, supported by six analog PSoC blocks. Simultaneous sampling depends on block allocation and decimator configuration - typical use supports 12–16 channels with 12-bit effective resolution using time-multiplexed acquisition.

What development tools are supported for firmware programming?

PSoC Designer IDE (discontinued but still supported for CY8C24x94) is the official tool, enabling drag-and-drop user module placement, C-code generation, and ISSP via XRES. Programming hardware includes MiniProg1 and MiniProg3; no JTAG adapter is required for basic flash updates.

Is CY8C24794-24LTXI pin-compatible with other CY8C24x94 variants?

Yes - all CY8C24x94 devices in the 56-pin LQFP package share identical pinouts and electrical characteristics. Differences are functional (e.g., XRES enablement, debug features) and do not affect PCB layout or I/O routing.