Microchip Technology ATSAM3S4
ATSAM3S4 variants from Microchip Technology
ATSAM3S4 Overview
What changes between part numbers, and what to check before you lock the BOM — Microcontrollers.
ATSAM3S4 is a Microchip Technology order-code family — not a single orderable MPN. This page lists 3 variants that share the same core device but differ in suffix fields (package, grade, reel/tube, electrical bin, etc.). Pick the exact full part number; substituting within the family without checking the datasheet often causes assembly or spec mismatches.
IC MCU 32BIT 256KB FLASH 48LQFP Other listed variants describe: IC MCU 32BIT 256KB FLASH 64LQFP; IC MCU 32BIT 256KB FLASH 100LQFP.
Suffix examples in this family: AA-AU, BA-AU, CA-AU. The characters after the base number usually encode package, temperature, or performance grade — compare the variant table column-by-column rather than assuming pin-compatible drops-in.
Example MPNs: ATSAM3S4AA-AU, ATSAM3S4BA-AU, ATSAM3S4CA-AU.
Key Features
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 3 distinct suffix patternsExamples: AA-AU, BA-AU, CA-AU. Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Microcontrollers — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 3 ATSAM3S4 part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|
| ATSAM3S4AA-AU | IC MCU 32BIT 256KB FLASH 48LQFP | Microchip Technology | Active | Compliant | In Stock | |
| ATSAM3S4BA-AU | IC MCU 32BIT 256KB FLASH 64LQFP | Microchip Technology | Active | Compliant | In Stock | |
| ATSAM3S4CA-AU | IC MCU 32BIT 256KB FLASH 100LQFP | Microchip Technology | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on ATSAM3S4 map to package, grade, and reel options.
ATSAM3S4 uses a shared prefix; characters after the prefix encode orderable options. Two lines with the same prefix are not drop-in replacements unless the differing columns match your need.
Suffixes seen here: AA-AU, BA-AU, CA-AU.
Full MPN examples: ATSAM3S4AA-AU, ATSAM3S4BA-AU, ATSAM3S4CA-AU.
Tip: photograph or copy the reel label — reel diameter, QTY per reel, and moisture sensitivity level (MSL) are often suffix-driven and won't show in the schematic.
How to Choose the Right ATSAM3S4 Microcontrollers
Match the footprint first
Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.
Electrical headroom
Compare voltage and current columns in the variant table. For ATSAM3S4, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "ATSAM3S4" — include the full suffix (e.g. AA-AU, BA-AU, CA-AU). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for ATSAM3S4 product family
Identity
Variant Parameters
Source ATSAM3S4 with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 3 ordering variants from Microchip Technology. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the ATSAM3S4 product family.