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Product Detailed Parameters
- Description：32KB,ECC,2XCPU,20MHZ,ERRCTRL,MVI
- Series：*
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
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- Number of I/O：-
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- Voltage - Supply (Vcc/Vdd)：-
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- Supplier Device Package：-
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Overview
The AVR32SD28T-I/SS is an 8-bit microcontroller from the AVR SD series, featuring a dual-core lockstep CPU architecture for functional safety compliance. It integrates 32 kB of system-in-programmable flash with ECC, 4 kB of SRAM with ECC, and 256 B of EEPROM with ECC. The device operates at clock speeds up to 20 MHz within a supply voltage range of 2.7 V to 5.5 V. It includes multiple analog peripherals such as comparators, ADCs, and zero-crossing detectors, housed in a 28-pin SSOP package.
Feature Summary
- Dual-core lockstep CPU configuration ensures high reliability for safety-critical applications.
- Integrated error correction codes (ECC) across flash, SRAM, and EEPROM enhance data integrity.
- Multi-voltage I/O capability allows flexible interfacing with various logic levels.
- Advanced digital peripherals include event systems and specialized timers for precise control.
Applications
- Automotive safety systems requiring ISO 26262 ASIL C compliance
- Industrial automation controllers needing robust fault detection
- Medical devices demanding high reliability and secure boot
Procurement Notes
Verify the specific suffix against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with programming tools supporting the UPDI interface. Check for any regional distribution restrictions or obsolescence notices prior to finalizing procurement plans.
Selection Notes
Select this component when functional safety standards like ISO 26262 are mandatory. The dual-core architecture provides redundancy essential for ASIL C designs. Consider the 20 MHz performance limit and available I/O count relative to system requirements before choosing over higher-speed variants.
Part Context
This part belongs to the AVR SD family, designed specifically for safety-related applications. It combines standard AVR performance with hardware-based safety features. The series supports various pin counts, with this model offering a balanced peripheral set in a compact surface-mount package suitable for dense PCB layouts.
Replacement Considerations
AVR32SD28-E/SS offers extended temperature range capabilities. AVR32SD20T-I/SS provides similar functionality in a smaller 20-pin package. Verify pinout compatibility and software migration efforts when considering these alternatives.
