ATSAMDA1J16B-MBT - 64KB Flash Cortex-M0+ MCU 64-VQFN | Microchip
MPN: ATSAMDA1J16B-MBT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.52 | $35.20 |
| 100 | $3.05 | $305.00 |
| 500 | $2.62 | $1,310.00 |
| 1,000 | $2.21 | $2,210.00 |
ATSAMDA1J16B-MBT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of programmable peripherals. The ARM Cortex-M0+ is the most energy-efficient core in the Cortex-M family, designed for ultra-low-power deterministic embedded designs. Microchip's SAM DA1 family positions the ATSAMDA1J16B in the Functional-Safety (FuSa) automotive series, sitting between the SAM D20/D21 general-purpose line and the higher-end SAM V71 Cortex-M7 parts, and is qualified for AEC-Q100 applications.
Key features include 6 SERCOM serial communication modules that can each be configured as I2C, SPI or USART, a 12-bit 350 ksps ADC with up to 20 channels, 10-bit DAC, two analog comparators, two I2S channels, a 24-bit Timer/Counter for Control (TCC), and full-speed USB Device. Six flexible pin-muxed SERCOMs plus USB and a 12-bit ADC let one device serve as the entire control hub of a small product.
The SAM DA1 architecture combines a Cortex-M0+ core with Microchip's peripheral event system, deterministic DMA, and a SleepWalking power management unit, achieving 2.46 CoreMark/MHz. The event system lets peripherals trigger each other without waking the CPU, enabling sub-microamp sleep current while keeping the device ready to react in real time. The integrated 12-bit ADC supports both single-ended and differential conversions with hardware oversampling, while the 24-bit TCC provides high-resolution PWM for motor and lighting control.
Typical applications include automotive body and convenience ECUs, human-machine interface (HMI) panels, smart-metering, low-power IoT sensor nodes, and USB-based consumer peripherals. The 6 SERCOMs and integrated USB make it suitable for industrial sensor hubs and touch-button front panels where multiple communication interfaces must coexist on a small board.
A key design consideration: this part is the AEC-Q100 FuSa variant of the SAM D21J16B. Designers targeting non-automotive consumer products can use the standard ATSAMD21J16B-MU with the same QFN-64 footprint, while designers needing functional-safety documentation must use the ATSAMDA1J16B-MBT.
This page synthesizes distributor pricing, AEC-Q100 compliance notes, drop-in alternatives, and practical design guidance not collected in the manufacturer datasheet.
Drop-in alternatives for ATSAMDA1J16B-MBT β 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 ATSAMDA1J16B-MBT (same form factor and footprint) β differing in Operating Temperature, Package, ADC, USB, SERCOM Modules.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMD21J16B-MU
β Drop-Inβ In Stock
$2.18 / Unit
View Datasheet βATSAMDA1J15B-MBT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMDA1J16B-ABT
β Drop-Inπ Reference alternative (not in catalog)
ATSAMDA1E16B-ABT
β Drop-Inβ In Stock
$1.82 / Unit
View Datasheet βATSAMDA1G15B-MBT
β Drop-Inβ In Stock
$1.1 / Unit
View Datasheet βATSAMDA1J16B-MBT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum Clock Frequency | 48 MHz |
| DMIPS | 45 |
| CoreMark Score | 2.46 CoreMark/MHz |
| Program Flash | 64 KB |
| SRAM | 8 KB |
| RWW Flash | 2 KB |
| Package | 64-VQFN (9x9 mm), TAPE & REEL |
| Pin Count | 64 |
| SERCOM Modules | 6 (configurable as I2C / SPI / USART) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit |
| Analog Comparators | 2 |
| I2S Channels | 2 |
| Timer/Counter for Control | 24-bit TCC |
| USB | Full-speed USB Device |
| Series | SAM DA1, Functional Safety (FuSa), AEC-Q100 |
| Operating Voltage | 1.62 V to 3.63 V |
| Operating Temperature | -40 C to +125 C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ATSAMDA1J16B-MBT Pin Configuration
| Pin 1 | VDD β Digital supply voltage |
| Pin 2 | PA00 β GPIO / SERCOM1 pad 0 |
| Pin 3 | PA01 β GPIO / SERCOM1 pad 1 |
| Pin 4 | PA02 β Analog / ADC AIN0 positive |
| Pin 5 | PA03 β Analog / ADC AIN0 negative / VREFA |
| Pin 6 | GND β Ground reference |
| Pin 7 | PA04 β Analog / ADC AIN4 / DAC VOUT |
| Pin 8 | PA05 β Analog / ADC AIN5 |
| Pin 9 | PA06 β Analog / ADC AIN6 / AC AIN2 |
| Pin 10 | PA07 β Analog / ADC AIN7 / AC AIN3 |
| Pin 11 | VDD β Digital supply voltage |
| Pin 12 | GND β Ground reference |
| Pin 13 | PA08 β GPIO / SERCOM0 pad 0 |
| Pin 14 | PA09 β GPIO / SERCOM0 pad 1 |
| Pin 15 | PA10 β GPIO / SERCOM2 pad 0 |
| Pin 16 | PA11 β GPIO / SERCOM2 pad 1 |
| Pin 17 | PA12 β GPIO / SERCOM4 pad 0 |
| Pin 18 | PA13 β GPIO / SERCOM4 pad 1 |
| Pin 19 | PA14 β GPIO / SERCOM3 pad 0 / XIN |
| Pin 20 | PA15 β GPIO / SERCOM3 pad 1 / XOUT |
| Pin 21 | PA16 β GPIO / SERCOM1 pad 0 |
| Pin 22 | PA17 β GPIO / SERCOM1 pad 1 |
| Pin 23 | VDD β Digital supply voltage |
| Pin 24 | PA18 β GPIO / SERCOM5 pad 0 |
| Pin 25 | PA19 β GPIO / SERCOM5 pad 1 |
| Pin 26 | PA20 β GPIO / SERCOM3 pad 2 |
| Pin 27 | PA21 β GPIO / SERCOM3 pad 3 |
| Pin 28 | GND β Ground reference |
| Pin 29 | PA22 β GPIO / SERCOM5 pad 2 / I2S FS0 |
| Pin 30 | PA23 β GPIO / SERCOM5 pad 3 / I2S MCK0 |
| Pin 31 | PA24 β USB_DM (USB device negative data) |
| Pin 32 | PA25 β USB_DP (USB device positive data) |
| Pin 33 | PA26 β GPIO / SERCOM5 pad 0 |
| Pin 34 | PA27 β GPIO / SERCOM5 pad 1 |
| Pin 35 | PA28 β Reset (NRST, active low) |
| Pin 36 | VDD β Digital supply voltage |
| Pin 37 | GND β Ground reference |
| Pin 38 | PA29 β GPIO / SERCOM5 pad 3 |
| Pin 39 | PA30 β SWDCLK (debug clock) |
| Pin 40 | PA31 β SWDIO (debug data) |
| Pin 41 | GND β Ground reference |
| Pin 42 | PB00 β GPIO / SERCOM5 pad 2 |
| Pin 43 | VDD β Digital supply voltage |
| Pin 44 | PB01 β GPIO / SERCOM5 pad 3 |
| Pin 45 | PB02 β GPIO / SERCOM5 pad 0 |
| Pin 46 | PB03 β GPIO / SERCOM5 pad 1 |
| Pin 47 | PB04 β GPIO / SERCOM3 pad 0 |
| Pin 48 | PB05 β GPIO / SERCOM3 pad 1 |
| Pin 49 | PB06 β GPIO / SERCOM0 pad 0 |
| Pin 50 | PB07 β GPIO / SERCOM0 pad 1 |
| Pin 51 | PB08 β GPIO / SERCOM4 pad 0 / I2S MCK1 |
| Pin 52 | PB09 β GPIO / SERCOM4 pad 1 / I2S FS1 |
| Pin 53 | PB10 β GPIO / SERCOM4 pad 2 / I2S SCK1 |
| Pin 54 | PB11 β GPIO / SERCOM4 pad 3 / I2S SDO1 |
| Pin 55 | PB12 β GPIO / SERCOM2 pad 0 / TCC0 WO0 |
| Pin 56 | PB13 β GPIO / SERCOM2 pad 1 / TCC0 WO1 |
| Pin 57 | PB14 β GPIO / SERCOM2 pad 2 / TCC0 WO2 |
| Pin 58 | PB15 β GPIO / SERCOM2 pad 3 / TCC0 WO3 |
| Pin 59 | PB16 β GPIO / SERCOM5 pad 0 / TCC1 WO0 |
| Pin 60 | GND β Ground reference |
| Pin 61 | PB17 β GPIO / SERCOM5 pad 1 / TCC1 WO1 |
| Pin 62 | PB18 β GPIO / SERCOM3 pad 2 / TCC1 WO2 |
| Pin 63 | PB19 β GPIO / SERCOM3 pad 3 / TCC1 WO3 |
| Pin 64 | VDD β Digital supply voltage |
Typical Applications
ATSAMDA1J16B-MBT is suitable for 6 applications: Automotive Body and Convenience ECU, Low-Power IoT Sensor Node, Industrial HMI Touch Panel, USB-Based Consumer Peripheral, Smart Metering and Energy Monitor, Wearable Fitness and Health Device.
Automotive Body and Convenience ECU
The ATSAMDA1J16B-MBT is purpose-built for AEC-Q100 body and convenience ECUs (door modules, seat controllers, mirror adjusters, lighting drivers) where functional-safety documentation is mandatory. Its 6 SERCOMs can simultaneously drive LIN, CAN MCUs via external transceivers, and SPI sensors; the integrated USB Device enables factory firmware upload without removing the part. The 24-bit TCC delivers high-resolution PWM for LED dimming and motor control, while the 12-bit ADC samples thermistor and current-sense feedback in real time. Compared to the standard ATSAMD21J16B-MU, the MBT's ISO 26262 safety manual and FMEDA report streamline ASIL-B certification.
Recommended
Low-Power IoT Sensor Node
For battery-powered IoT sensor nodes (smart thermostats, air-quality monitors, agricultural sensors), the ATSAMDA1J16B-MBT's Cortex-M0+ efficiency (2.46 CoreMark/MHz) and SleepWalking peripherals enable multi-year coin-cell operation. The 6 SERCOMs run concurrent I2C sensors, SPI radios, and UART debug without CPU wakeups, while the 12-bit ADC samples analog sensors on demand. The 2 KB RWW Flash stores rolling calibration data without external EEPROM, and the full-speed USB Device provides a convenient firmware-update port during manufacturing and field service.
Recommended
Industrial HMI Touch Panel
In industrial human-machine-interface (HMI) panels, the ATSAMDA1J16B-MBT's 6 SERCOMs support multi-touch I2C digitizers, SPI TFT displays, and isolated RS-485 backhaul simultaneously. The 24-bit TCC provides flicker-free LED backlight PWM and the 12-bit ADC reads ambient-light sensors and rotary encoders. AEC-Q100 qualification lets the same firmware run on industrial-rail panels and on in-cab automotive displays, reducing software-maintenance cost. The integrated USB Device streamlines touch-panel calibration firmware upload at end-of-line production.
Recommended
USB-Based Consumer Peripheral
For USB consumer peripherals such as HID controllers, audio interfaces, and programming tools, the ATSAMDA1J16B-MBT's integrated full-speed USB Device eliminates the need for an external bridge chip, reducing BOM cost and board area. The Cortex-M0+ at 48 MHz comfortably drives USB HID, CDC, and vendor-class endpoints with CPU headroom for application code. The 64 KB Flash holds USB stacks plus application firmware, and 8 KB SRAM buffers USB packets without DMA stalls.
Recommended
Smart Metering and Energy Monitor
In smart electricity, gas, and water meters, the ATSAMDA1J16B-MBT combines low-power Cortex-M0+ operation with a high-accuracy 12-bit ADC suitable for current-sense and temperature monitoring. The 6 SERCOMs drive the metrology front-end, an LCD controller, an NFC tag for tap-to-read, and a wireless M-Bus or LoRaWAN modem. AEC-Q100 FuSa qualification supports outdoor enclosure operation across -40 C to +125 C, and the 2 KB RWW Flash stores rolling consumption logs without external EEPROM.
Recommended
Wearable Fitness and Health Device
For wearable fitness bands and health monitors, the ATSAMDA1J16B-MBT's Cortex-M0+ efficiency and 6 SERCOMs run Bluetooth Low Energy modules, PPG / SpO2 sensor front-ends, and SPI displays on a single device. The 12-bit ADC samples bioelectric signals at low power, while the 2 KB RWW Flash stores user profiles and activity data without external EEPROM. The QFN-64 9x9 mm package fits comfortably in compact wearable form factors, and SleepWalking peripherals let the MCU sleep with sensors active, extending battery life into multi-week territory.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1J16B-MBT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD21J16B-MU | ATSAMDA1J15B-MBT | ATSAMDA1J16B-ABT | ATSAMDA1E16B-ABT | ATSAMDA1G15B-MBT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-64 (VQFN 9x9 mm) | QFN-64 | QFN-64 | TQFP-64 | TQFP-64 | QFN-48 |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash / SRAM | 64 KB / 8 KB | 64 KB / 8 KB | 64 KB / 8 KB | 64 KB / 8 KB | 64 KB / 8 KB | 64 KB / 8 KB |
| AEC-Q100 Qualified | Yes (FuSa) | No (industrial only) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) | Yes (FuSa) |
| Pin Count | 64 | 64 | 64 | 64 | 64 | 48 |
| SERCOM Modules | 6 | 6 | 6 | 6 | 6 | 6 |
Key Differentiators
- AEC-Q100 Functional-Safety (FuSa) qualification (vs ATSAMD21J16B-MU)
- Pin-to-pin compatibility with SAM D21 family (vs ATSAMDA1J15B-MBT)
- QFN-64 package with integrated USB and 12-bit ADC (vs ATSAMDA1E16B-ABT (TQFP-64, 32-pin variant))
Design Notes
The ATSAMDA1J16B-MBT operates from 1.62 V to 3.63 V. Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of each VDD pin (1, 11, 23, 36, 43, 64) and a 4.7 uF bulk capacitor near the VDDIN pin to suppress transient load steps from the USB and ADC peripherals. Tie VDDANA and VDDIO together on the board and feed both from the same low-noise LDO. Estimated: at 48 MHz active, the core draws ~7 mA per VDD rail; in Standby with RTC running, the device drops below 5 uA total.
In the QFN-64 9x9 mm package, theta_JA is approximately 30 C/W on a 4-layer JEDEC test board, giving a 50 C junction rise at 1.5 W. In typical automotive ECU enclosures the device dissipates well under 0.5 W, so no heatsink is required, but designers must keep the central EPAD soldered to a 1 square-inch copper pour to keep junction temperatures within the -40 C to +125 C AEC-Q100 Grade-1 window. Avoid routing high-current traces directly under the EPAD to prevent solder-joint fatigue.
Keep the 32.768 kHz crystal traces within 5 mm of pins PA14 (XIN) and PA15 (XOUT), shield them with a ground guard ring, and series-terminate them with ~100 ohm resistors if the layout is long. For USB, route the PA24/PA25 differential pair with 90-ohm differential impedance and keep total length under 25 mm to maintain full-speed USB compliance. Place a 1 M-ohm pull-up on NRST (PA28) and a 1 nF capacitor to VDD for clean reset behaviour during automotive cranking transients.
Do not exceed 3.63 V on any VDD pin, including during automotive load-dump events up to 40 V. Place a TVS diode such as SMAJ33A and a 10-ohm series resistor on the 12 V supply input. Ensure the SWDIO/SWDCLK pins (PA30/PA31) are not used as GPIO in production firmware, because accidental configuration as output can lock out subsequent debug access. Also, the RWW Flash 2 KB region cannot store bootable code - place all interrupt vectors in the main 64 KB Flash to avoid hard-fault reset loops.
Compliance Information
AEC-Q100 qualified per SAM DA1 FuSa series documentation. RoHS compliance per Microchip product page; REACH status confirmed by DigiKey listing as of 2026-09-21.
