IS32CS8974A-QWLCA3-TR

Microcontrollers Overview

The IS32CS8974A-QWLCA3-TR is an automotive-grade MCU featuring a 1-cycle 8051 CPU core operating up to 25MHz. It integrates 32KB of ECC-protected e-Flash and 2KB of ECC SRAM. The device includes a capacitance sense touch-key controller with up to 20-bit resolution, active proximity sensing, and shield output for moisture immunity. Communication interfaces include I2C, SPI, UART, and LIN-capable EUART. It operates on a single supply from 2.5V to 5.5V within a -40°C to 125°C temperature range.

Microcontrollers Feature Summary

• Integrated capacitance sense touch-key controller supporting up to 19 key inputs with dual-slope charge-sharing conversion for high noise immunity.
• Built-in error correction code (ECC) for both program memory and data RAM to ensure data integrity in harsh environments.
• Active proximity sensor capability supporting mutual sensing for enhanced user interaction detection.
• Comprehensive analog peripherals including low voltage detection and power-on reset circuits for reliable operation.

Microcontrollers Applications

• Automotive touch key applications requiring high robustness
• Appliance control panels with moisture resistance needs
• Proximity sensing systems in consumer electronics

Microcontrollers Procurement Notes

Verify the specific suffix QWLCA3 against the official datasheet to confirm package type and temperature grade. Ensure the design supports the wettable flank QFN-24 footprint. Confirm AEC-Q100 qualification requirements are met for the target automotive application before finalizing procurement.

Microcontrollers Selection Notes

Select this component when an integrated solution combining an 8051 MCU with capacitive touch sensing is required. It is suitable for designs needing built-in memory protection via ECC and support for multiple communication protocols including LIN and I2C. Consider the extended temperature range if operating in under-hood or industrial environments.

Microcontrollers Part Context

This part belongs to the CS8974A family of microcontrollers designed specifically for touch key applications. It serves as an upgrade to previous versions like the IS32CS8974, offering enhanced reliability through ECC and improved touch sensing capabilities. The family targets cost-sensitive yet robust embedded control markets.

Microcontrollers Replacement Considerations

The IS32CS8974-QWLA3-TR is listed as a discontinued substitute. Verify pin compatibility and software register mapping before transitioning. Ensure the replacement meets the same AEC-Q100 and temperature specifications.

Microcontrollers FAQ

Does the IS32CS8974A support auto-detection wakeup?

Yes, the touch key controller allows sleep mode with auto-detection for wakeup functionality.

What is the maximum number of keys supported by the touch controller?

The device supports a maximum of 19 key scans using its capacitance sense touch-key controller.

Is there hardware protection against data loss?

Yes, data loss protection is implemented in hardware by restricting access to critical storage segments.