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ATSAM3S1BA-AUR Equivalent & Substitute Parts
Part Overview
The ATSAM3S1BA-AUR is an ARM Cortex-M3 SAM3S microcontroller IC manufactured by Microchip Technology, featuring 32-bit single-core architecture operating at 64MHz with 64KB FLASH memory and 16KB RAM. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements. The part is housed in a 64-LQFP (10x10) surface mount package and operates across the industrial temperature range of -40°C to 85°C.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Series | SAM3S |
| Core Processor | ARM Cortex-M3 |
| Core Size | 32-Bit Single-Core |
| Speed | 64MHz |
| Program Memory Size | 64KB (64K x 8) FLASH |
| RAM Size | 16K x 8 |
| Package / Case | 64-LQFP (10x10) |
| Voltage Supply (Vcc/Vdd) | 1.62V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the ATSAM3S1BA-AUR is determined by strict equivalence across the following critical parameters:
- Processor Architecture: ARM Cortex-M3 core
- Memory Configuration: 64KB FLASH and 16KB RAM
- Operating Frequency: 64MHz
- Package Format: 64-LQFP (10x10) surface mount
- Voltage Range: 1.62V ~ 3.6V
- Temperature Range: -40°C ~ 85°C
- Connectivity Interfaces: I2C, MMC, SPI, SSC, UART/USART, USB
- Peripheral Set: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- I/O Count: 47 pins
- Compliance: ROHS3 Compliant
The ATSAM3S1BB-AUR meets all substitution criteria as a direct equivalent within the SAM3S product family.
Parameter Comparison
| Parameter | ATSAM3S1BA-AUR | ATSAM3S1BB-AUR |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | SAM3S | SAM3S |
| Core Processor | ARM Cortex-M3 | ARM Cortex-M3 |
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core |
| Speed | 64MHz | 64MHz |
| Program Memory Size | 64KB (64K x 8) FLASH | 64KB (64K x 8) FLASH |
| RAM Size | 16K x 8 | 16K x 8 |
| Number of I/O | 47 | 47 |
| Connectivity | I2C, MMC, SPI, SSC, UART/USART, USB | I2C, MMC, SPI, SSC, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT | Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT |
| Data Converters | A/D 10x10/12b; D/A 2x12b | A/D 10x10/12b; D/A 2x12b |
| Voltage Supply (Vcc/Vdd) | 1.62V ~ 3.6V | 1.62V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 64-LQFP (10x10) | 64-LQFP (10x10) |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| ECCN | 3A991A2 | 3A991A2 |
| HTSUS | 8542.31.0001 | 8542.31.0001 |
| Product Status | Obsolete | Active |
| Packaging Option | Not specified | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
The ATSAM3S1BB-AUR is a direct functional equivalent to the ATSAM3S1BA-AUR. The primary distinction is product lifecycle status: the ATSAM3S1BA-AUR is classified as obsolete, while the ATSAM3S1BB-AUR maintains active production status. Both devices are ROHS3 compliant and carry identical electrical, thermal, and mechanical specifications. The ATSAM3S1BB-AUR is available in standard packaging formats (Cut Tape and Digi-Reel), supporting production continuity. Selection of the ATSAM3S1BB-AUR eliminates obsolescence risk while maintaining full design compatibility.
Frequently Asked Questions (FAQ)
Q: Are the ATSAM3S1BA-AUR and ATSAM3S1BB-AUR pin-compatible?
A: Yes. Both devices use the 64-LQFP (10x10) package with identical pin assignments, I/O configuration (47 pins), and functional connectivity. PCB layout and schematic designs require no modification.
Q: What is the difference between these two part numbers?
A: The ATSAM3S1BB-AUR is the active production equivalent of the obsolete ATSAM3S1BA-AUR. All electrical specifications, memory configuration, operating parameters, and peripheral sets are identical. The suffix change reflects product lifecycle management by Microchip Technology.
Q: Can I use the ATSAM3S1BB-AUR as a direct replacement in existing designs?
A: Yes. The ATSAM3S1BB-AUR provides full functional equivalence with no design modifications required. Firmware, PCB layout, and component selection remain unchanged.
Q: Are there any compliance or certification differences?
A: No. Both parts maintain ROHS3 compliance, identical ECCN classification (3A991A2), and equivalent moisture sensitivity levels (MSL 3, 168 hours). Regulatory and environmental requirements are satisfied by either part.
Q: What packaging options are available for the substitute part?
A: The ATSAM3S1BB-AUR is supplied in Cut Tape (CT) and Digi-Reel® formats, supporting both prototype and production volume requirements.
Q: Is the voltage supply range identical?
A: Yes. Both parts operate across 1.62V to 3.6V, supporting identical power supply designs and voltage regulation requirements.
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