ATSAMDA1J14B-ABT - 48MHz Cortex-M0+ MCU, 16KB Flash, 64-TQFP | Microchip
MPN: ATSAMDA1J14B-ABT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.15 | $4.15 |
| 10 | $3.74 | $37.40 |
| 100 | $3.32 | $332.00 |
| 500 | $2.99 | $1,495.00 |
| 1,000 | $2.66 | $2,660.00 |
| 3,000 | $2.45 | $7,350.00 |
ATSAMDA1J14B-ABT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (SRAM), and a wide range of configurable peripherals into one package. The ARM Cortex-M0+ is a low-gate-count 32-bit core optimized for energy efficiency and deterministic interrupt response, making it the entry point of the ARM Cortex-M family. The SAM DA1 family specifically targets safety-critical industrial and automotive subsystems where IEC 61508 / ISO 26262 compliance, deterministic behavior, and long product lifecycle are required.
Key features include a 48 MHz maximum CPU clock, single-cycle 32x32 hardware multiply, hardware divide, an 8-channel 12-bit ADC, 10-bit DAC, two analog comparators, two I2S interfaces, and up to 52 GPIO. Power management provides multiple clock-gated Run, Wait, and Sleep modes with 1.7V to 3.6V VDD operating range, plus a Brown-Out Detector (BOD) and Power-On Reset (POR). The 64-TQFP package exposes the maximum peripheral count of the family, giving designers full access to all six SERCOM modules.
Architecturally, the SAM DA1 builds on Atmel/Microchip's SAM D20 heritage but adds hardware-level FuSa features such as memory protection, watchdog redundancy, error correction on internal buses, and dual-bank Flash that prevents in-application programming from corrupting live firmware. The peripheral event system (EVSYS) lets peripherals trigger each other without CPU involvement, freeing clock cycles for application logic.
Typical applications include functional-safety industrial sensor nodes, IEC 61508 SIL2 capable PLC digital I/O modules, motor drive housekeeping MCUs, household appliance primary controllers, Class B safety firmware on off-road equipment, and safety supervision paired with a host MCU in zone architectures. Designers choose this MCU when they need Cortex-M0+ simplicity combined with documented FuSa support at a tight BOM cost.
When designing with the ATSAMDA1J14B-ABT, ensure VDD decoupling follows Microchip's recommended 100 nF + bulk capacitor placement and that unused pins are configured as input with pull-up or drive-low per the SAM DA1 errata to minimize power. Programming and debug are handled via the standard 2-wire SWD interface that any Atmel Studio, MPLAB X, or pyOCD/CMSIS-DAP toolchain can drive.
This page synthesizes distributor pricing, drop-in alternates within the SAM DA1 family and across competing 32-bit MCUs, and practical FuSa-aware design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for ATSAMDA1J14B-ABT 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 ATSAMDA1J14B-ABT (same form factor and footprint) β differing in ADC, Core, GPIO Count, Package, SERCOM Modules.
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ATSAMDA1J14C-ABT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAMDA1J14A-ABT
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ATSAMDA1J15B-ABT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAMDA1J16B-ABT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATSAMDA1G15B-ABT
β Drop-Inβ In Stock
$2.85 / Unit
View Datasheet βATSAMDA1J14B-ABT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Series | SAM DA1 (Functional Safety) |
| Maximum CPU Clock | 48 MHz (45 DMIPS) |
| Program Flash | 16 KB (with 512B RWW support) |
| SRAM | 4 KB |
| Operating Voltage | 1.62 V to 3.6 V |
| Typical Supply | 3.3 V |
| Package | 64-TQFP (10x10 mm) with Exposed Pad |
| GPIO Count | Up to 52 |
| ADC | 12-bit, up to 8 channels |
| DAC | 10-bit, 1 channel |
| Analog Comparators | 2 |
| SERCOM Modules | 6 (each configurable as USART/I2C/SPI) |
| Hardware Multiply | 32-bit single-cycle multiply |
| Operating Temperature | -40 C to +85 C (Industrial, -ABT suffix) |
| RoHS | Compliant |
ATSAMDA1J14B-ABT Pin Configuration
| Pin 1 | PA00 β GPIO / ADC0 / XIN |
| Pin 2 | PA01 β GPIO / ADC1 / XOUT |
| Pin 3 | PA02 β GPIO / ADC2 / AIN0 |
| Pin 4 | PA03 β GPIO / ADC3 / AIN1 |
| Pin 5 | GND β Ground |
| Pin 6 | VDD β Digital supply |
| Pin 7 | VSW β Switching voltage regulator output |
| Pin 8 | VDDIO β I/O supply (1.62V-3.6V) |
| Pin 9 | PA04 β GPIO / ADC4 / AIN2 |
| Pin 10 | PA05 β GPIO / ADC5 / AIN3 |
| Pin 11 | PA06 β GPIO / ADC6 / AIN4 |
| Pin 12 | PA07 β GPIO / ADC7 / AIN5 |
| Pin 13 | PA08 β GPIO / SERCOM0 / I2S |
| Pin 14 | PA09 β GPIO / SERCOM0 / I2S |
| Pin 15 | PA10 β GPIO / SERCOM0 / I2S |
| Pin 16 | PA11 β GPIO / SERCOM0 / I2S |
| Pin 17 | PA12 β GPIO / SERCOM0 / I2S |
| Pin 18 | PA13 β GPIO / SERCOM1 |
| Pin 19 | PA14 β GPIO / SERCOM1 |
| Pin 20 | PA15 β GPIO / SERCOM1 |
| Pin 21 | PA16 β GPIO / SERCOM1 / I2S |
| Pin 22 | PA17 β GPIO / SERCOM1 / I2S |
| Pin 23 | PA18 β GPIO / SERCOM3 |
| Pin 24 | PA19 β GPIO / SERCOM3 |
| Pin 25 | PA20 β GPIO / SERCOM3 |
| Pin 26 | PA21 β GPIO / SERCOM3 |
| Pin 27 | PA22 β GPIO / SERCOM3 |
| Pin 28 | PA23 β GPIO / SERCOM3 |
| Pin 29 | PA24 β GPIO / SERCOM5 |
| Pin 30 | PA25 β GPIO / SERCOM5 |
| Pin 31 | PA26 β GPIO / SERCOM5 |
| Pin 32 | PA27 β GPIO / SERCOM5 |
| Pin 33 | PB00 β GPIO / SERCOM5 |
| Pin 34 | PB01 β GPIO / SERCOM5 |
| Pin 35 | PB02 β GPIO / SERCOM5 / ADC11 |
| Pin 36 | PB03 β GPIO / SERCOM5 / ADC10 |
| Pin 37 | PB04 β GPIO / SERCOM5 / ADC9 |
| Pin 38 | PB05 β GPIO / SERCOM5 / ADC8 |
| Pin 39 | PB06 β GPIO / SERCOM4 |
| Pin 40 | PB07 β GPIO / SERCOM4 |
| Pin 41 | PB08 β GPIO / SERCOM4 |
| Pin 42 | PB09 β GPIO / SERCOM4 |
| Pin 43 | PB10 β GPIO / SERCOM4 |
| Pin 44 | PB11 β GPIO / SERCOM4 |
| Pin 45 | PB12 β GPIO / SERCOM4 |
| Pin 46 | PB13 β GPIO / SERCOM4 |
| Pin 47 | PB14 β GPIO / SERCOM2 |
| Pin 48 | PB15 β GPIO / SERCOM2 |
| Pin 49 | PB16 β GPIO / SERCOM2 |
| Pin 50 | PB17 β GPIO / SERCOM2 |
| Pin 51 | PB18 β GPIO / SERCOM2 |
| Pin 52 | PB19 β GPIO / SERCOM2 |
| Pin 53 | PB20 β GPIO / SERCOM2 |
| Pin 54 | PB21 β GPIO / SERCOM2 |
| Pin 55 | PB22 β GPIO |
| Pin 56 | PB23 β GPIO |
| Pin 57 | PB24 β GPIO |
| Pin 58 | PB25 β GPIO |
| Pin 59 | PA30 β GPIO / SWCLK |
| Pin 60 | PA31 β GPIO / SWDIO |
| Pin 61 | nRESET β Reset (active low) |
| Pin 62 | VDD β Digital supply |
| Pin 63 | GND β Ground |
| Pin 64 | VREGO β Main voltage regulator output |
Typical Applications
ATSAMDA1J14B-ABT is suitable for 7 applications: Functional Safety Industrial Sensor Node (IEC 61508 SIL2), White Goods and Appliance Primary Controller, Building Automation Sensor Module, Automotive Body and Sensor Hubs (AEC-Q100 path), Low-Power Industrial IoT Edge Controller, Safety Supervisor Paired with Host MCU, Class B Appliance and Outdoor Equipment Controller.
Functional Safety Industrial Sensor Node (IEC 61508 SIL2)
The ATSAMDA1J14B-ABT's SAM DA1 family heritage and Functional Safety (FuSa) documentation directly target IEC 61508 SIL2 capable designs, making it a strong primary MCU for industrial sensor nodes. The 48 MHz Cortex-M0+ core plus 12-bit ADC and event system suffice for 1 kHz control loops and Class B self-test firmware; 4 KB SRAM is enough for a modbus stack with safety shadow variables. The 64-TQFP body gives access to all six SERCOM channels so designers can run RS-485, I2C sensor, and SPI analog front-ends concurrently.
Recommended
White Goods and Appliance Primary Controller
White goods appliances such as washing machines, dryers, and induction cooktops need deterministic 32-bit control with safety diagnostics at a tight BOM. The 4 KB SRAM of the ATSAMDA1J14B-ABT fits a motor-control state machine plus user-interface debouncing, while the 16 KB Flash leaves room for IEC 60335-1 House-keeping routines. The wide 1.62V-3.6V operating range lets one chip cover both 3.3V logic and 2.5V battery-backed power-on branches.
Recommended
Building Automation Sensor Module
Building HVAC and lighting subsystems often require ultra-low standby power plus standard serial interfaces (USART for BACnet MS-TP, I2C for sensors, SPI for expansion). The ATSAMDA1J14B-ABT's Run, Wait, and Sleep modes, with configurable Sleepwalking peripherals, drop standby consumption to single-digit uA. The 6 SERCOM channels map to BACnet, Modbus, and I2C sensor fans without needing an external bridge IC. The 64-TQFP body supports up to 52 GPIO for direct keypad and LED driving.
Recommended
Automotive Body and Sensor Hubs (AEC-Q100 path)
The SAM DA1 family AEC-Q100 capability makes the ATSAMDA1J14B-ABT a good fit for automotive body control and sensor hub sub-systems that demand -40C to +125C grade parts alongside 16 KB of Flash for diagnostic firmware. The 10-bit DAC plus two analog comparators enable simple actuator loops for HVAC flaps and seat adjusters, while six SERCOM interfaces accommodate LIN, CAN-transceiver-ready, and SPI peripherals. For full AEC-Q100 retellering Microchip offers other SAM DA1 part numbers; this part targets industrial cut-down but is automotive-capable through the silicon lineage.
Recommended
Low-Power Industrial IoT Edge Controller
Edge controllers for Industrial IoT must wake infrequently, sample sensors, and report over RS-485 or wireless networks while sipping battery. The ATSAMDA1J14B-ABT supports USB-less battery-friendly operation through SERCOM-based interfaces, plus Sleepwalking that wakes only when a UART edge or ADC threshold is crossed, achieving energy proportionality. 16 KB of Flash is sufficient for sensing stacks such as Modbus master, JSON serialization, and OTA-loaded patches through the 512B RWW Flash window.
Recommended
Safety Supervisor Paired with Host MCU
In multi-core architectures for industrial drives and medical hardware, the ATSAMDA1J14B-ABT can act as a low-cost watchdog-and-supervisor MCU that watches the primary Cortex-M4 or Cortex-M7 host for clock failures, brownouts, and watchdog miss events. With its 6 SERCOM channels it can independently mirror serial traffic for safety verification, and the 16 KB Flash easily holds the supervisor state machine and a small fault log. The FuSa documentation in the SAM DA1 datasheet supports the IEC 61508 claim structure for the supervisor role.
Recommended
Class B Appliance and Outdoor Equipment Controller
Class B safety classification on washing machines, dishwashers, and lawn equipment drives duplication of critical self-test functions. The ATSAMDA1J14B-ABT's 16 KB Flash and 4 KB SRAM are sufficient to run a soft-PMSM control loop plus safety routines such as RAM March C, PC check, and stack monitoring with all six SERCOM channels reused for HMI, motor sense, and fault reporting. The 64-TQFP body supports the GPIO density needed to drive triac gates, keypad matrix, and LCD interfaces on outdoor power tools.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1J14B-ABT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMDA1J14C-ABT | ATSAMDA1J14A-ABT | ATSAMDA1J15B-ABT | ATSAMDA1J16B-ABT | ATSAMDA1G15B-ABT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Core | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit |
| Maximum CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Program Flash | 16 KB | 16 KB (same) | 16 KB (same) | 32 KB (+100%) | 64 KB (+300%) | 32 KB (+100%) |
| SRAM | 4 KB | 4 KB (same) | 4 KB (same) | 4 KB (same) | 8 KB (+100%) | 4 KB (same) |
| Operating Voltage | 1.62V to 3.6V | 1.62V to 3.6V (same) | 1.62V to 3.6V (same) | 1.62V to 3.6V (same) | 1.62V to 3.6V (same) | 1.62V to 3.6V (same) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
Key Differentiators
- Functional Safety (FuSa) documentation for IEC 61508 / ISO 26262 design paths (vs ATSAM3S2BA-AU)
- Tightest BOM cost in the SAM DA1 family at 16 KB Flash (vs ATSAMDA1J16B-ABT)
- Read-While-Write 512B Flash section for safe EEPROM emulation in safety firmware (vs ATSAMD21J18A-AU)
- Cortex-M0+ simplicity with 6 SERCOM channels and 12-bit ADC onboard (vs ATSAM3S2BA-AU)
Design Notes
On the SAM DA1 family, place a 1 uF X7R ceramic bypass directly between VDD and GND with the shortest possible trace, and add a 100 nF capacitor in parallel next to the bulk. The internal switching regulator needs at least 4.7 uF of low-ESR bulk at VSW. Power sequencing is automatic on the ATSAMDA1J14B-ABT, but the BOD requires VDD to rise monotonically through 1.5V for a clean POR.
The 64-TQFP package has an exposed thermal pad on the underside that MUST be soldered to a ground copper pour of at least 1 square cm. Two thermal vias in a 0.5mm grid under the pad reduce the junction-to-ambient impedance from approximately 35 C/W down to roughly 25 C/W, supporting full 48 MHz operation at industrial temperatures. Estimated: With 8 mA active current at 3.3V, junction rise stays under 5 C over ambient in well-vented enclosures; in sealed housings, derate by 30%.
Route the SWD signals (PA30 SWCLK, PA31 SWDIO) as a 200-mil differential pair away from switching nodes, and add a 4.7 k pull-up on PA31 SWDIO for hot-attach reliability. Keep the 32.768 kHz crystal traces shorter than 5 mm and shield them with a ground guard ring to minimize jitter on the DFLL48M closed loop. Leave a JTAG header pattern in the PCB fab even if you only use SWD; this speeds up Class B firmware signature checks during production.
Do not power the ATSAMDA1J14B-ABT below 1.62V - the brown-out detector is calibrated above this threshold and partial-reset behavior is undefined below it. Avoid using SERCOM4 PA08..PA13 as a fast SPI master clocked above 12 MHz, because the internal PAD drive strength saturates; clock up to 12 MHz is guaranteed in the SAM DA1 datasheet. When using the 512-byte RWW Flash for EEPROM emulation, schedule the NVM write inside a critical section with an external watchdog to prevent corrupted flash pages on brown-out events.
For CISPR 11 Class A margins, route all high-speed digital traces over an unbroken reference plane and place a ferrite bead on the VDDIO rail feeding the ATSAMDA1J14B-ABT. The Cortex-M0+ core has slow slew IOs that are inherently low-EMI, but the SERCOM SAM21 and SAM D20-class outputs can exceed 5 dBuV/m in the 30-100 MHz band if the SERCOM lines are unshielded. A short soft-start to the system clock and Sleep walking peripherals on completion of transmission further reduces emissions.
Compliance Information
RoHS / REACH compliance per Microchip environmental page. AEC-Q100 status applies to other SAM DA1 family part numbers with -B suffix and explicit Q ordering; this -ABT suffix indicates industrial temperature grade, -40C to +85C, and is NOT itself qualified to AEC-Q100. SAM DA1 silicon lineage supports Functional Safety documentation; users must verify the FMEDA is current.
