ATSAMDA1E15B-MBT - 48MHz Cortex-M0+ MCU 32KB Flash | Microchip
MPN: ATSAMDA1E15B-MBT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.21 | $32.10 |
| 100 | $2.74 | $274.00 |
| 500 | $2.39 | $1,195.00 |
| 1,000 | $2.12 | $2,120.00 |
ATSAMDA1E15B-MBT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, programmable I/O, and a set of on-chip peripherals such as timers, ADCs, and communication interfaces. The Cortex-M0+ core is the most energy-efficient member of the ARM Cortex-M family, designed for deterministic, low-power embedded workloads. The SAM DA1 family extends the standard SAMD20/SAMD21 family with hardware functional-safety features, deterministic latency, and BIST support intended to simplify IEC 61508 and ISO 26262 system certification.
Key features include four SERCOM modules configurable as USART, I2C, or SPI, a 12-bit ADC with up to 20 channels, a 10-bit DAC, six 16-bit timers/counters, a 32-bit RTC, and full-speed USB 2.0 device with on-chip transceiver. The device supports 1.62 V to 3.63 V core VDD, low-power Sleep and Standby modes down to a few microamps, and a peripheral event system that lets peripherals trigger one another without CPU intervention.
Architecturally, the ATSAMDA1E15B-MBT uses a 2-layer AHB matrix with separate buses for Flash and SRAM, enabling zero-wait-state code execution at 48 MHz from Flash. The integrated voltage regulator and Power-on Reset reduce external BOM, while the WDT, CRC, and lock-bit features add tamper resistance. The VQFN-5x5 footprint is pin-compatible with other SAM D20/D21/DA1 E-variant 32-pin parts.
Typical applications include automotive body and chassis ECUs, industrial sensor nodes, building-automation controllers, low-power IoT edge devices, and functional-safety sub-systems such as over-current protection or sensor monitoring. The FuSa features make the part especially suitable for safety elements out of context (SEooC) at SIL-2 / ASIL-B levels.
When designing with this device, ensure that the VQFN-5x5 exposed pad is soldered to a sufficiently large copper pour for thermal dissipation. Decouple VDD and VDDCORE with 100 nF and 4.7 µF ceramic capacitors placed within 2 mm of the supply pins, and route the SERCOM lines as impedance-controlled differential pairs when using I2C Fast Mode Plus or SPI at >25 MHz.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM D family, and practical design notes not found in the manufacturer datasheet, giving engineers a single, citable reference for selecting the ATSAMDA1E15B-MBT in functional-safety designs.
Drop-in alternatives for ATSAMDA1E15B-MBT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMDA1E15B-MBT (same form factor and footprint) — differing in ADC, DAC, Package, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD21E15B-AU
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →ATSAMD20E15B-AUT
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →ATSAML21E15B-MUT
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →ATSAMDA1E15B-MBT-ND
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D15A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMDA1E15B-MBTVAO
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMDA1E15B-MBT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz |
| DMIPS | 45 DMIPS |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| RWW Flash | 1 KB |
| Operating Voltage (VDD) | 1.62 V to 3.63 V |
| Package | 32-VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| SERCOM Modules | 4 (configurable as USART/I2C/SPI) |
| ADC | 12-bit, up to 20 channels |
| DAC | 10-bit, 1 channel |
| USB | USB 2.0 Full-Speed Device with on-chip transceiver |
| Timers/Counters | 6 x 16-bit TC, 1 x 32-bit RTC |
| RoHS Status | Compliant |
ATSAMDA1E15B-MBT 32-vqfn (5x5 mm) Pin Configuration Guide
Pin configuration for ATSAMDA1E15B-MBT (32-vqfn (5x5 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAMDA1E15B-MBT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAMDA1E15B-MBT is suitable for 7 applications: Automotive Body and Chassis ECUs, Industrial Sensor Nodes, Building Automation Controllers, Low-Power IoT Edge Devices, Functional-Safety Sub-Systems, USB Human-Interface Devices, Motor Control Sub-Systems.
Automotive Body and Chassis ECUs
The ATSAMDA1E15B-MBT's FuSa features (windowed WDT, deterministic event system, lock-bit Flash) and 32-VQFN compact footprint make it ideal for automotive body and chassis ECUs such as door modules, mirror controllers, and lighting nodes. At 48 MHz Cortex-M0+ the MCU handles LIN-based body networks and CAN-FD bridging via the SERCOM peripherals. The 32 KB Flash accommodates typical body ECU application code with 1 KB RWW Flash enabling OTA-style firmware updates without ECU downtime. Per ISO 26262 ASIL-B hardware elements, designers pair the part with an external CAN-FD transceiver for in-vehicle networking.
Recommended
Industrial Sensor Nodes
The 12-bit ADC with up to 20 channels, four SERCOM modules, and 48 MHz Cortex-M0+ performance make the ATSAMDA1E15B-MBT well suited for industrial 4-20 mA loop-powered sensor nodes. The part's low-power Standby mode draws a few microamps, enabling multi-year battery life on wireless sensor platforms. Functional-safety features such as BIST and CRC monitoring support IEC 61508 SIL-2 process instrumentation. Typical circuit uses an RTD or strain-gauge front end feeding the ADC, with SERCOM-0 driving an RS-485 transceiver for industrial bus connectivity.
Recommended
Building Automation Controllers
For HVAC controllers, smart thermostats, and access-control panels, the ATSAMDA1E15B-MBT provides deterministic peripheral event handling for triac-based load switching and zero-cross detection. The integrated 10-bit DAC drives 0-10 V analog outputs for damper and valve actuators. USB 2.0 Full-Speed device enables Wi-Fi/BLE module commissioning via the on-chip transceiver. The 32-VQFN 5x5 mm footprint fits standard 1U control-panel layouts, and the 1.62 V to 3.63 V supply range supports both 3.3 V and 5 V bus architectures.
Recommended
Low-Power IoT Edge Devices
Battery-powered IoT edge devices benefit from the ATSAMDA1E15B-MBT's Sleep and Standby modes that drop current consumption to a few microamps while maintaining RTC operation and Wake-on-GPIO. The 4 SERCOM modules support concurrent SPI sensor, I2C EEPROM, and UART debug interfaces. The 32 KB Flash accommodates typical BLE/Zigbee application stacks with 4 KB SRAM for sensor data buffering. Compared with full Cortex-M4 parts, the Cortex-M0+ core trades DSP performance for significantly lower active current at the same throughput class.
Recommended
Functional-Safety Sub-Systems
The ATSAMDA1E15B-MBT's dedicated hardware for IEC 61508 / ISO 26262 functional safety makes it a strong fit for safety sub-systems such as over-current protection, motor-stall detection, and sensor-diagnostic monitoring. Designers run the MCU alongside a primary controller, using the FuSa windowed WDT and CRC to detect out-of-spec conditions. The deterministic peripheral event system guarantees bounded interrupt latency for safety-critical timing. System-level FMEDA, watchdog timing analysis, and software diversity metrics must still be performed at the integrator level.
Recommended
USB Human-Interface Devices
The on-chip USB 2.0 Full-Speed device transceiver eliminates the need for an external PHY, allowing the ATSAMDA1E15B-MBT to serve as a compact HID controller for keyboards, pointer devices, custom input panels, and USB-to-UART bridges. The 32 KB Flash holds HID class drivers and customization firmware, while 4 KB SRAM is sufficient for descriptor buffering and report queues. The 48 MHz clock rate ensures 1 ms polling deadlines are met without CPU loading, and SERCOM-3 can be repurposed as a debug UART when USB is not in use.
Recommended
Motor Control Sub-Systems
For small BLDC or stepper motor control sub-systems, the ATSAMDA1E15B-MBT provides 6 16-bit timers for PWM generation and quadrature decoding. The Cortex-M0+ at 48 MHz executes field-oriented control (FOC) loops at modest speeds sufficient for fans, pumps, and small appliances. The 32-VQFN 5x5 mm footprint fits compact motor-driver daughterboards, and the deterministic event system ensures precise commutation timing. Designers pair the MCU with external gate drivers such as the MCP8024 for three-phase half-bridge control.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1E15B-MBT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD21E15B-AU | ATSAMD20E15B-AU | ATSAML21E15B-MUT | ATSAMDA1E15B-MBTVAO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-32 (5x5 mm) | TQFP-32 | TQFP-32 | VQFN-32 | VQFN-32 - same |
| Core Architecture | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| USB | USB 2.0 FS Device with on-chip PHY | USB 2.0 FS Device | No USB | No USB | USB 2.0 FS Device |
| Functional Safety (FuSa) | Yes (IEC 61508 SIL-2 / ISO 26262 ASIL-B) | No | No | No | Yes (with AEC-Q100) |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
Key Differentiators
- Hardware functional-safety features (windowed WDT, deterministic event system, lock-bit Flash) (vs ATSAMD21E15B-AU)
- Same die, AEC-Q100 qualified variant available for automotive (vs ATSAMDA1E15B-MBTVAO)
- On-chip USB 2.0 Full-Speed transceiver (vs ATSAML21E15B-MUT)
Design Notes
The 32-VQFN package has a thermal pad that must be soldered to a ground copper pour of at least 25 mm^2 to keep the junction temperature within safe limits. For continuous full-load operation at 48 MHz, the device dissipates approximately 30 mW (estimated: VDD=3.3V, ICC=9 mA, P=VDD x ICC). This is well within the 1 W dissipation rating of the package when the exposed pad is properly soldered. Designers should avoid routing high-current traces across the thermal pad to maintain thermal conduction.
Decouple VDD with a 100 nF X7R 0402 ceramic capacitor placed within 2 mm of the VDD pin, and add a bulk 4.7 uF X5R ceramic capacitor on the same net. The VDDCORE pin (internal 1.2 V LDO output) requires a 1 uF ceramic capacitor. Route SERCOM signals as impedance-controlled 50 ohm traces when running SPI at >25 MHz or I2C Fast Mode Plus (1 Mbaud). Keep the USB DP/DM traces as a 90 ohm differential pair with no stubs.
Three common pitfalls when designing with the ATSAMDA1E15B-MBT: (1) forgetting to solder the exposed thermal pad, which degrades thermal performance and causes reliability failures; (2) using the wrong ADC reference - the default bandgap reference is 1.0 V, but the ADC supports an external VREF for higher accuracy; (3) not enabling the brown-out detector (BOD) at startup, which can cause undefined behavior on slow-rising power rails. Consult the SAM DA1 family datasheet section on 'Start-Up Considerations' before finalizing the schematic.
Compliance Information
RoHS/REACH compliant per Microchip product page. The -MBT variant is industrial grade (-40C to +85C); use the -MBTVAO suffix variant for AEC-Q100 automotive qualification. Halogen-free per Microchip declaration.
