CY8C24794-24LTXI

Overview

The CY8C24794-24LTXI is an 8-bit microcontroller from the PSoC 1 family, utilizing the M8C processor core. It features 16 KB of Flash program storage and 1 KB of SRAM data memory. The device supports a maximum clock speed of 24 MHz and operates within a voltage range of 3 V to 5.25 V across an industrial temperature range of –40 °C to +85 °C. It integrates full-speed USB 2.0 capability with five configurable endpoints and a dedicated 256-byte buffer, eliminating the need for external crystals.

Feature Summary

• Configurable analog and digital system-on-chip architecture allowing custom peripheral creation
• Integrated full-speed USB 2.0 interface with internal oscillator for precise timing
• Capacitive sensing application (CSA) capability via programmable pin configurations
• Flexible GPIO drive modes including strong, open-drain, and high impedance states

Applications

• Capacitive touch sensing controllers
• USB-enabled human machine interfaces
• Smart sensor nodes requiring analog signal conditioning
• General-purpose embedded control systems

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape/reel specifications. Ensure compatibility with the required operating voltage and temperature range for your target environment. Confirm that the selected development tools support the M8C architecture and PSoC Designer IDE for firmware integration.

Selection Notes

Select this component when a combination of analog configurability, digital flexibility, and native USB connectivity is required in a single chip. Consider the available GPIO count and the number of analog blocks needed for your specific signal processing tasks. Evaluate the memory requirements against the 16 KB Flash and 1 KB SRAM limits before finalizing the design.

Part Context

This part belongs to the CY8C24x94 series of PSoC 1 devices, which are designed to replace multiple traditional MCU-based components. The series offers a balance of processing power and analog/digital programmability, targeting applications that require low cost and high integration levels without sacrificing performance or feature set.

Replacement Considerations

Check for direct substitutes within the CY8C24x94 family that may offer different pin counts or memory sizes. Verify if newer generations such as PSoC 4 or PSoC 5LP provide equivalent functionality with improved performance or lower power consumption, noting that architectural differences will require significant firmware redesign.

FAQ

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

No, the device includes an internal oscillator with sufficient accuracy for full-speed USB operation, eliminating the need for external crystals.

What is the maximum current drive capability of the GPIO pins?

The GPIO pins can sink up to 25 mA and source up to 10 mA. Additionally, two pins can provide up to 33 mA for analog output functions.