Infineon Technologies CY8C24794-24LTXIT

Overview

CY8C24794-24LTXIT from Cypress Semiconductor is a programmable System-on-Chip (PSoC) integrating an M8C 8-bit CPU, six analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), four digital PSoC blocks (including UART, SPI, PWM, CRC), full-speed USB 2.0 (12 Mbps), 16 KB flash, 1 KB SRAM, and operates from 3 V to 5.25 V across –40 °C to +85 °C industrial temperature range - used in capacitive touch sensing, embedded control, and USB-connected human interface devices.

For engineers reviewing the CY8C24794-24LTXIT datasheet, CY8C24794-24LTXIT pinout, CY8C24794-24LTXIT application, or CY8C24794-24LTXIT equivalent, key selection criteria include USB endpoint count (4 unidirectional + 1 bidirectional), analog input capability (up to 48 GPIOs), precision internal oscillator (±4% main, 0.25% USB-calibrated), programmable drive strength (25 mA sink), and ISSP support via XRES pin.

Technical Context

The CY8C24794-24LTXIT implements a Harvard-architecture M8C core running at up to 24 MHz with dual 8×8 multipliers and 32-bit accumulator, enabling real-time signal processing for sensor fusion and timing-critical control loops. Its analog system includes rail-to-rail programmable gain amplifiers, comparators, and decimator-type ADCs with configurable resolution up to 14 bits.

Digital peripherals are implemented as configurable PSoC Blocks interconnected via global digital and analog routing matrices; USB functionality uses a dedicated 256-byte buffer and requires no external crystal due to integrated oscillator calibration - critical for cost-sensitive, space-constrained USB HID designs.

Key Specifications

Pinout & Package

Package: 56-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 microcontroller applications.

Compared with CY8C24894 and CY8C24994, the CY8C24794 offers lowest cost and smallest footprint for production HID or CapSense® applications where ISSP and debug are handled externally or omitted entirely.

Availability

CY8C24794-24LTXIT is available at Aetrix Electronics and suitable for industrial HMI panels, USB human interface devices, and smart appliance control boards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY8C24794-24LTXIT 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 - headquartered in San Jose, CA, with global R&D and manufacturing operations.

The CY8C24x94 product line delivers cost-optimized PSoC® devices targeting capacitive touch, USB HID, and industrial control applications - emphasizing analog integration, low-power operation, and field-programmability without external crystals.

FAQ

Does CY8C24794-24LTXIT support USB without an external crystal?

Yes. It integrates a factory-trimmed internal main oscillator (IMO) with 0.25% accuracy specifically calibrated for USB full-speed operation, eliminating the need for an external 24 MHz crystal or oscillator. This reduces BOM cost and PCB layout complexity while maintaining USB 2.0 compliance.

How many analog channels can be simultaneously sampled on CY8C24794-24LTXIT?

The device supports up to 48 GPIOs configurable as analog inputs, but simultaneous sampling depends on ADC architecture: its decimator-type ADC performs sequential conversion with typical throughput of 10 kSPS at 14-bit resolution. True simultaneous sampling requires external multiplexing or external ADCs.

Is ISSP supported on CY8C24794-24LTXIT despite lacking an XRES pin?

No. The CY8C24794 variant does not include the XRES pin, which is required for in-system serial programming (ISSP). Programming must be performed using external SWD/JTAG via MiniProg3 or prior to soldering using gang programmers - field updates are not supported on this variant.

What is the maximum drive strength per GPIO on CY8C24794-24LTXIT?

Each GPIO supports 25 mA sink current and 10 mA source current under specified voltage and temperature conditions. Drive modes include strong, open-drain, pull-up, pull-down, and high-Z. Exceeding 25 mA sink per pin risks violating absolute maximum ratings and may cause latch-up or parametric shift.