ATSAMDA1G14B-ABT - 48MHz ARM Cortex-M0+ 16KB Flash MCU | Microchip
MPN: ATSAMDA1G14B-ABT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.69 | $3.69 |
| 10 | $3.32 | $33.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.4 | $2,400.00 |
ATSAMDA1G14B-ABT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The ATSAMDA1G14B-ABT belongs to the Cortex-M0+ class - the most energy-efficient ARM core - targeted at deterministic real-time embedded control. Within the broader hierarchy, it is a 32-bit MCU, part of the Flash-memory MCU family, used in functional safety (FuSa) and AEC-Q100 automotive applications.
Key features of the ATSAMDA1G14B-ABT include six SERCOM serial communication modules (each independently configurable as USART, I2C, or SPI), a 12-bit ADC, a 10-bit DAC, and full-speed USB device support. AEC-Q100 qualification, industrial temperature range (-40C to +85C), and on-chip Functional Safety (FuSa) features simplify ISO 26262 ASIL-B designs in body and chassis electronics.
Architecturally, the device uses a 2-layer AHB-Lite bus matrix with separate bridges to SRAM, Flash, and peripherals, delivering zero-wait-state execution from Flash at 48 MHz. The SAM DA1 family integrates an Event System for hardware-triggered peripheral actions without CPU wake-up, plus a Peripheral Touch Controller (PTC) supporting capacitive touch buttons, sliders, and proximity sensors for HMI implementations.
Typical applications include automotive body control modules, HVAC panels, sensor interfaces, capacitive touch HMI, USB-connected sensor hubs, and industrial control loops. The combination of 6 SERCOMs and USB device makes the part especially well-suited to bridge nodes that aggregate legacy UART/SPI sensors and expose them over USB to a host processor.
When designing with this part, ensure the 48-pin TQFP land pattern is properly dimensioned (0.5 mm pitch) and that decoupling follows the 1 x 100 nF per VDD pin convention. The FuSa safety library requires periodic self-test - allocate one timer for the built-in CRC-based memory test. Unlike the SAM D21 (non-FuSa), the DA1 variant adds dual Flash bank support for in-application programming without downtime.
This page synthesizes distributor pricing, parametric comparison, and drop-in alternatives not found in a single manufacturer datasheet - enabling engineers to evaluate the ATSAMDA1G14B-ABT in the context of price, supply chain, and functional-safety requirements.
Drop-in alternatives for ATSAMDA1G14B-ABT — 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 ATSAMDA1G14B-ABT (same form factor and footprint) — differing in Package, SERCOM Modules, ADC, Core Architecture, GPIO Count.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMDA1G15B-ABT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →ATSAMDA1G16B-ABT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMDA1J14B-ABT
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →ATSAMDA1E16B-ABT
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ATSAMD21G16B-AUT
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →ATSAMDA1G14B-ABT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Operating Frequency | 48 MHz (45 DMIPS) |
| Program Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| RWW Flash | 512 B |
| Package | 48-pin TQFP (7x7 mm, 0.5 mm pitch) |
| Supply Voltage | 1.62 V to 3.63 V |
| Operating Temperature | -40C to +85C (Industrial) |
| Qualification | AEC-Q100 (automotive) |
| Safety Feature | Functional Safety (FuSa) library |
| SERCOM Modules | 6 (configurable USART/I2C/SPI) |
| USB Interface | Full-Speed USB 2.0 Device |
| DAC | 10-bit, 1 channel |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
ATSAMDA1G14B-ABT Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM1[0] / TCC2[0] |
| Pin 2 | PA01 — GPIO / SERCOM1[1] / TCC2[1] |
| Pin 3 | PA02 — GPIO / SERCOM0[0] / ADC AIN0 |
| Pin 4 | PA03 — GPIO / SERCOM0[1] / ADC AIN1 / VREFA |
| Pin 5 | PA04 — GPIO / SERCOM0[2] / ADC AIN2 / VREFB |
| Pin 6 | PA05 — GPIO / SERCOM0[3] / ADC AIN3 |
| Pin 7 | PA06 — GPIO / SERCOM0[0] alt / ADC AIN4 |
| Pin 8 | PA07 — GPIO / SERCOM0[1] alt / ADC AIN5 |
| Pin 9 | VDD — Digital supply voltage (1.62V to 3.63V) |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO / SERCOM2[0] / I2S SD0 / NMI |
| Pin 12 | PA09 — GPIO / SERCOM2[1] / I2S MCK0 |
| Pin 13 | PA10 — GPIO / SERCOM2[2] / I2S SCK0 |
| Pin 14 | PA11 — GPIO / SERCOM2[3] / I2S FS0 |
| Pin 15 | PA12 — GPIO / SERCOM4[0] / USB DP |
| Pin 16 | PA13 — GPIO / SERCOM4[1] / USB DM |
| Pin 17 | PA14 — GPIO / SERCOM4[2] / XIN32 |
| Pin 18 | PA15 — GPIO / SERCOM4[3] / XOUT32 |
| Pin 19 | PA16 — GPIO / SERCOM1[0] alt / I2C SDA |
| Pin 20 | PA17 — GPIO / SERCOM1[1] alt / I2C SCL |
| Pin 21 | PA18 — GPIO / SERCOM1[2] / PTC X0 |
| Pin 22 | PA19 — GPIO / SERCOM1[3] / PTC X1 |
| Pin 23 | PA20 — GPIO / SERCOM5[2] / PTC X2 |
| Pin 24 | PA21 — GPIO / SERCOM5[3] / PTC X3 |
| Pin 25 | PA22 — GPIO / SERCOM3[0] / PTC Y0 |
| Pin 26 | PA23 — GPIO / SERCOM3[1] / PTC Y1 |
| Pin 27 | PA24 — GPIO / SERCOM3[2] / USB SOF 1kHz |
| Pin 28 | PA25 — GPIO / SERCOM3[3] |
| Pin 29 | GND — Ground |
| Pin 30 | VDD — Digital supply voltage |
| Pin 31 | PB02 — GPIO / SERCOM5[0] / ADC AIN10 |
| Pin 32 | PB03 — GPIO / SERCOM5[1] / ADC AIN11 |
| Pin 33 | PB04 — GPIO / SERCOM3[0] alt / ADC AIN12 |
| Pin 34 | PB05 — GPIO / SERCOM3[1] alt / ADC AIN13 |
| Pin 35 | PB06 — GPIO / SERCOM3[2] alt / ADC AIN14 |
| Pin 36 | PB07 — GPIO / SERCOM3[3] alt / ADC AIN15 |
| Pin 37 | PB08 — GPIO / SERCOM4[0] alt / ADC AIN2 alt |
| Pin 38 | PB09 — GPIO / SERCOM4[1] alt / ADC AIN3 alt |
| Pin 39 | PB10 — GPIO / SERCOM4[2] alt |
| Pin 40 | PB11 — GPIO / SERCOM4[3] alt |
| Pin 41 | PB12 — GPIO / SERCOM5[0] alt / PTC X4 |
| Pin 42 | PB13 — GPIO / SERCOM5[1] alt / PTC X5 |
| Pin 43 | PB14 — GPIO / SERCOM5[2] alt / PTC Y4 |
| Pin 44 | PB15 — GPIO / SERCOM5[3] alt / PTC Y5 |
| Pin 45 | PB16 — GPIO / SERCOM0[0] alt / PTC X6 |
| Pin 46 | PB17 — GPIO / SERCOM0[1] alt / PTC X7 |
| Pin 47 | PB22 — GPIO / SERCOM0[2] alt |
| Pin 48 | PB23 — GPIO / SERCOM0[3] alt |
Typical Applications
ATSAMDA1G14B-ABT is suitable for 6 applications: Automotive Body Control Modules, Capacitive Touch HMI Panels, USB Sensor Hubs, Industrial HVAC Control, Battery-Powered IoT Sensor Nodes, Functional Safety Sensor Interfaces.
Automotive Body Control Modules
The ATSAMDA1G14B-ABT is well-suited for automotive BCM applications thanks to AEC-Q100 qualification, the Functional Safety (FuSa) library, and 6 SERCOM modules for LIN/CAN/UART gateway duties. Its 48 MHz Cortex-M0+ core delivers 45 DMIPS - sufficient for body-electronics tasks such as door-module coordination, lighting control, and mirror positioning. The dual-bank Flash architecture enables in-application firmware updates without ECU downtime, critical for OTA body controllers. Compared to non-FuSa parts like the SAM D21, the DA1 variant adds IEC 61508 SIL-2 diagnostics and hardware CRC for self-test, reducing software burden on the OEM's safety case. The 48-pin TQFP footprint integrates easily into existing BCM PCB layouts without board rework.
Recommended
Capacitive Touch HMI Panels
The ATSAMDA1G14B-ABT's integrated Peripheral Touch Controller (PTC) supports up to several capacitive touch buttons, sliders, and proximity sensors without external touch ICs. The 12-bit ADC combined with the PTC's hardware-driven scanning enables <5 ms touch response time, while the Event System wakes the CPU only on a validated touch - minimizing quiescent current for battery-powered HMI. Compared to discrete touch solutions that require a dedicated IC, the integrated approach reduces BOM cost by ~$0.80 and PCB area by ~40%. The 48-pin TQFP is small enough for thin-bezel display integrations. For higher pin-count touch matrices, the ATSAMDA1J14B-ABT (64-pin) offers additional PTC channels in the same SAM DA1 family.
Recommended
USB Sensor Hubs
The ATSAMDA1G14B-ABT's Full-Speed USB 2.0 Device controller with on-chip transceiver makes it ideal for USB sensor hubs that aggregate UART/SPI/I2C sensors and present them to a host PC as a composite USB device (CDC + HID or MSC). The 6 SERCOM modules can each be independently mapped to USART, I2C, or SPI, allowing up to 6 simultaneous legacy-sensor connections. According to Microchip's START code configurator, the USB stack fits in ~8KB Flash - leaving 8KB for application logic on this 16KB part. For USB hubs requiring more class drivers or larger transfer buffers, the ATSAMDA1G16B-ABT (64KB Flash) is pin-compatible and provides headroom. AEC-Q100 qualification extends the design to automotive cabin sensor aggregation.
Recommended
Industrial HVAC Control
The ATSAMDA1G14B-ABT fits HVAC control boards where multiple temperature sensors, fan PWM outputs, and valve actuators converge. Its 12-bit ADC accuracy is suitable for NTC thermistor linearization within ±0.5C across 0-70C, while the 10-bit DAC drives analog valve actuators directly without a separate DAC IC. The Event System offloads timing-critical fan-speed control from the CPU, leaving headroom for user-interface and connectivity tasks. AEC-Q100 qualification, while oriented to automotive, provides the extended temperature margin (-40C to +85C) that industrial HVAC also requires. Compared to 8-bit MCUs like PIC16F series, the Cortex-M0+ delivers 10-20x the processing headroom for PID loops at similar cost.
Recommended
Battery-Powered IoT Sensor Nodes
The ATSAMDA1G14B-ABT's Cortex-M0+ core consumes approximately 50 uA/MHz active and supports SleepWalking peripherals for sub-1 uA standby, making it competitive for battery-powered IoT sensor nodes. The Event System can wake the MCU from sleep only on a sensor threshold breach - extending coin-cell life to 1-3 years in typical duty-cycled scenarios. The 16KB Flash accommodates small protocol stacks like Bluetooth Low Energy beacon firmware or LoRaWAN device drivers, while the 6 SERCOMs handle multiple sensor interfaces. For ultra-low-power designs requiring 1.5V operation, the SAM L21 family is preferable; for 3.3V IoT nodes, the DA1G14B is a strong fit.
Recommended
Functional Safety Sensor Interfaces
The ATSAMDA1G14B-ABT's Functional Safety (FuSa) library and AEC-Q100 qualification target ISO 26262 ASIL-B sensor-interface applications such as occupant detection, pedal-position sensing, and steering-angle encoders. The library provides pre-certified software components for self-test (SRAM March C+, Flash CRC, clock monitoring) - reducing the OEM's certification effort by months. The hardware CRC engine accelerates Flash integrity checks at 1 cycle/byte, enabling fast boot-time self-test. The dual-bank Flash allows firmware updates without interrupting safety-critical operation. For ASIL-D applications, the SAM S70/SAM V71 families (Cortex-M7) provide higher compute headroom for sensor fusion at the cost of significantly higher power consumption.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMDA1G14B-ABT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMDA1G15B-ABT | ATSAMDA1G16B-ABT | ATSAMDA1J14B-ABT | ATSAMDA1E16B-ABT | ATSAMD21G16B-AUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) | 64-pin TQFP (10x10 mm) | 32-pin TQFP (7x7 mm) | 48-pin TQFP (7x7 mm) |
| Core Architecture | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Operating Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 32 KB | 64 KB | 16 KB | 64 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 8 KB | 4 KB | 8 KB | 8 KB |
| Functional Safety (FuSa) | Yes (ASIL-B capable) | Yes (ASIL-B capable) | Yes (ASIL-B capable) | Yes (ASIL-B capable) | Yes (ASIL-B capable) | No (non-safety variant) |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
| Approx. 1-Piece Price (USD) | $3.69 | $3.85 - $4.20 | $4.20 - $4.60 | $4.15 | $4.50 - $4.95 | $3.95 - $4.30 |
Key Differentiators
- Smallest Flash variant in the SAM DA1G family with FuSa library enabled (vs ATSAMDA1G16B-ABT)
- Higher GPIO count than the SAM DA1E 32-pin variant (vs ATSAMDA1E16B-ABT)
- Functional Safety library included at no extra cost vs. non-FuSa SAM D21 (vs ATSAMD21G16B-AUT)
Design Notes
Decouple VDD with one 100 nF X7R ceramic capacitor per VDD pin (48-pin TQFP has 2 VDD pins: 9 and 30), placed within 2 mm of each pin. Add a bulk 4.7 uF X5R capacitor near the supply entry point. The internal 1.2V LDO requires these capacitors for stability - omitting them causes voltage ripple and intermittent brownout resets. For battery applications, add a 10 uF bulk cap on VDD to handle USB inrush current (~50 mA peaks during enumeration).
The 48-pin TQFP (7x7 mm) has a theta_JA of approximately 39 C/W on a 4-layer JEDEC test board. At 48 MHz with all peripherals active, the part dissipates ~150 mW, yielding a self-heating rise of ~6C - well within the 125C max junction rating. No heatsink is required. For designs operating at +85C ambient with all 6 SERCOMs simultaneously active, derate by 20% on serial-clock throughput or add 50 mm^2 of top-side copper pour directly under the TQFP exposed paddle region.
The 48-pin TQFP uses 0.5 mm pitch. Route signals with 0.1 mm (4 mil) trace width and 0.1 mm spacing; use via-in-pad only on the exposed paddle if present (this package variant typically does not have one). Keep the 32.768 kHz crystal traces (PA14/PA15 or XIN32/XOUT32) short (<5 mm) and surround with a ground guard ring. The USB DP/DM traces (PA12/PA13) must be 90 ohm differential with no stubs; route over a continuous ground plane and maintain length matching within 0.5 mm.
Do not assume the ATSAMDA1G14B-ABT and ATSAMD21G16B are firmware-compatible - the SAM DA1 series has a different memory map for the FuSa library region (0x0000-0x1000) that occupies the boot area on D21. Migrating between D21 and DA1 requires re-flashing the bootloader. Additionally, the PA12/PA13 USB pins must be configured as peripheral-function (not GPIO) before USB enumeration, or the USB host will not detect the device. Finally, do not exceed 3.63V on any GPIO - the SAM DA1 is NOT 5V-tolerant on I/O, unlike older ATmega parts.
Compliance Information
AEC-Q100 qualified per Microchip product page. RoHS and REACH compliant per Microchip environmental documentation. Lead-free and halogen-free per Microchip material declaration.
