ATSAML11D14A-MFT - 32MHz Cortex-M23 MCU 16KB Flash 24-VQFN | Microchip
MPN: ATSAML11D14A-MFT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.76 | $2.76 |
| 10 | $2.45 | $24.50 |
| 100 | $2.1 | $210.00 |
| 500 | $1.82 | $910.00 |
| 1,000 | $1.65 | $1,650.00 |
ATSAML11D14A-MFT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and a rich set of peripherals such as timers, ADC, communication interfaces (I2C, SPI, USART), and GPIO. The SAM L11 family belongs to the broader category of 32-bit embedded microcontrollers, which sit between 8/16-bit MCUs (lower performance, simpler peripherals) and higher-end microprocessors/MPUs (with external memory and complex OS support). Cortex-M23 specifically targets ultra-low-power secure IoT nodes, combining the energy efficiency of Cortex-M0+ with the optional TrustZone isolation of Cortex-M33 at a lower gate count.
Key features of the ATSAML11D14A-MFT include hardware crypto accelerators (AES, SHA, True Random Number Generator), secure boot with immutable root key storage, up to 16 GPIOs, a 12-bit ADC, multiple SERCOM peripherals configurable as I2C/SPI/USART, and a 125 C industrial-grade operating temperature range (denoted by the 'M' in the part suffix). The 'F' suffix indicates Tape and Reel packaging, while 'T' designates the 125 C maximum junction temperature.
Architecturally, the SAM L11 implements a dual-bank Flash with secure and non-secure regions, TrustZone-M for hardware-enforced isolation, and a Secure Firmware Update mechanism. The 32 MHz Cortex-M23 core delivers 0.93 DMIPS/MHz with a single-cycle multiplier, executing Thumb-2 instructions. Integrated peripherals include a 32-channel Event System, RTC, and low-power SleepWalking modes that wake peripherals selectively.
Typical applications include secure IoT sensor nodes, wireless meter endpoints, smart locks and access control, wearables with secure identity, secure payment terminals, industrial sensor hubs, and battery-powered edge devices requiring over-the-air firmware updates with cryptographic authentication. The chip-level tamper detection makes it well-suited for point-of-sale terminals and anti-counterfeiting use cases.
When designing with this part, carefully plan the secure/non-secure memory partition early because TrustZone boundaries affect linker scripts and library linking. Ensure the supply decoupling network uses at least one 100 nF capacitor placed within 2 mm of each VDD pin to meet the 32 MHz operation's noise budget.
This page synthesizes distributor pricing, drop-in package-compatible alternatives from the same SAM L11 family, and practical design notes not consolidated in any single manufacturer document.
Drop-in alternatives for ATSAML11D14A-MFT — 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 ATSAML11D14A-MFT (same form factor and footprint) — differing in Package, Core, ADC, Core Architecture, Security Features.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-MF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D15A-MFTKPH
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →ATSAML11D14A-MU
✅ Drop-In✓ In Stock
$1.91 / Unit
View Datasheet →ATSAML11D14A-YF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MF
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ATSAML11E14A-MFT
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →ATSAML11D14A-MFT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 with TrustZone-M |
| Core Size | 32-bit |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current (per MHz) | < 25 uA/MHz (typical) |
| Sleep Current | < 100 nA |
| Operating Temperature Range | -40 C to +125 C (industrial) |
| Package / Case | 24-VQFN Exposed Pad (4x4 mm) |
| Mounting Type | Surface Mount |
| Number of I/Os | Up to 16 GPIO |
| ADC | 12-bit, up to 10 channels |
| Communication Interfaces | SERCOM (configurable I2C/SPI/USART) |
| Security Features | TrustZone-M, secure boot, AES, SHA, TRNG, tamper detection |
| RoHS Status | Compliant (per Microchip product page) |
ATSAML11D14A-MFT Pin Configuration
| Pin 1 | VDD — Main supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | PA00 — GPIO / SERCOM0 / ADC |
| Pin 4 | PA01 — GPIO / SERCOM0 / ADC |
| Pin 5 | PA02 — GPIO / SERCOM0 / ADC |
| Pin 6 | PA03 — GPIO / SERCOM0 / ADC |
| Pin 7 | PA04 — GPIO / SERCOM0 / ADC |
| Pin 8 | PA05 — GPIO / SERCOM0 / ADC |
| Pin 9 | PA06 — GPIO / SERCOM0 / ADC |
| Pin 10 | PA07 — GPIO / SERCOM0 / ADC / XIN |
| Pin 11 | PA08 — GPIO / SERCOM0 / ADC / XOUT |
| Pin 12 | PA09 — GPIO / SERCOM0 / ADC |
| Pin 13 | PA10 — GPIO / SERCOM0 / ADC |
| Pin 14 | PA11 — GPIO / SERCOM0 / ADC |
| Pin 15 | PA14 — GPIO / SERCOM2 / SWDIO |
| Pin 16 | PA15 — GPIO / SERCOM2 / SWCLK |
| Pin 17 | PA16 — GPIO / SERCOM1 |
| Pin 18 | PA17 — GPIO / SERCOM1 |
| Pin 19 | PA18 — GPIO / SERCOM1 |
| Pin 20 | PA19 — GPIO / SERCOM1 |
| Pin 21 | RESET — Active-low reset input |
| Pin 22 | VDD — Main supply voltage (second pin) |
| Pin 23 | GND — Ground (second pin) |
| Pin 24 | EP — Exposed thermal pad - tie to GND |
Typical Applications
ATSAML11D14A-MFT is suitable for 6 applications: Secure IoT Sensor Node, Smart Lock and Access Control, Wearable Health Monitor, Industrial Sensor Hub, Secure Payment Terminal, Battery-Powered Edge AI Sensor.
Secure IoT Sensor Node
The ATSAML11D14A-MFT fits secure IoT sensor nodes because its less than 25 uA/MHz active current and less than 100 nA sleep current enable multi-year battery life on a single CR2032. The TrustZone-M hardware isolation lets the secure bootloader verify signed firmware before allowing application code to run, preventing unauthorized access. Placed between the battery and a sub-GHz radio like the SAM R34, with a 100 nF decoupling capacitor within 2 mm of VDD, the MCU provides authenticated telemetry over 5-10 year deployment windows.
Recommended
Smart Lock and Access Control
The ATSAML11D14A-MFT is suited for smart lock and access control because its chip-level tamper detection, secure key storage, and TrustZone-M prevent physical attacks from extracting credentials. The AES-256 hardware accelerator performs credential encryption in less than 50 cycles per block, leaving CPU headroom for keypad scanning and motor control. Used with a SAM D20 motor driver companion and connected via BLE to a phone, it enables secure entry while keeping standby current below 1 uA for battery-powered deadbolts.
Recommended
Wearable Health Monitor
The ATSAML11D14A-MFT suits wearable health monitors because its 24-VQFN (4x4 mm) package fits wrist-form-factor PCBs while consuming less than 100 nA in sleep mode during idle periods. The 12-bit ADC samples photoplethysmography (PPG) or ECG signals at up to 1 MSPS, sufficient for heart rate and SpO2 measurement. Combined with secure boot to protect HIPAA-relevant patient data, the part is ideal for fitness bands and medical patches requiring 7-day battery life between charges.
Recommended
Industrial Sensor Hub
The ATSAML11D14A-MFT fits industrial sensor hubs because its -40 to +125 C operating range and SERCOM-configurable I2C/SPI interfaces handle multiple sensor types on a single bus. The 32 MHz Cortex-M23 executes predictive maintenance algorithms at the edge, reducing cloud bandwidth requirements. Mounted near vibration and temperature sensors with isolated CAN-FD uplink via the SAM E70 companion, it provides secure data aggregation in factory automation environments with industrial-grade reliability.
Recommended
Secure Payment Terminal
The ATSAML11D14A-MFT suits secure payment terminals because its TRNG, AES hardware acceleration, and chip-level tamper resistance meet PCI PTS 4.x hardware security module requirements. The TrustZone-M isolates cryptographic operations from application code, preventing software attacks from leaking PIN data. Connected to an EMVCo-certified smart card reader via SPI, the MCU handles transaction processing at 32 MHz while maintaining EMV L1 timing budgets. Battery-backed RTC ensures time-stamping even during mains power loss.
Recommended
Battery-Powered Edge AI Sensor
The ATSAML11D14A-MFT is appropriate for battery-powered edge AI sensors because its Cortex-M23 core executes lightweight TinyML inference at less than 25 uA/MHz, enabling keyword spotting or vibration classification on coin cells. The 16 KB Flash holds TFLite Micro models up to 8-10 KB, leaving headroom for the application. Used with external SPI flash for model updates and accelerometer over I2C, the part supports remote firmware upgrade with cryptographic signature verification via TrustZone-M.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D14A-MFT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-MF | ATSAML11D15A-MFTKPH | ATSAML11D14A-MU | ATSAML11D14A-YF | ATSAML11D14A-MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 24-VQFN (4x4) | 24-VQFN (4x4) | 24-VQFN (4x4) | 24-VQFN (4x4) | 24-VQFN (4x4) | 24-VQFN (4x4) |
| Flash | 16 KB | 32 KB | 32 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Core | Cortex-M23 TrustZone-M | Cortex-M23 TrustZone-M | Cortex-M23 TrustZone-M | Cortex-M23 TrustZone-M | Cortex-M23 TrustZone-M | Cortex-M23 TrustZone-M |
| Max Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Temperature Range | -40 to +125 C | -40 to +85 C | -40 to +125 C | -40 to +85 C | -40 to +85 C | -40 to +85 C |
Key Differentiators
- Only Cortex-M23 with chip-level TrustZone-M in 24-VQFN (vs ATSAML10D14A-MF)
- Industrial 125 C operating range (vs ATSAML11D14A-MU)
- Upgradable Flash path in same footprint (vs ATSAML11D15A-MF)
Design Notes
Place at least one 100 nF X7R ceramic decoupling capacitor within 2 mm of each VDD pin and tie the exposed pad (EP) to a clean GND plane. The SAM L11's 32 MHz Cortex-M23 core draws less than 25 uA/MHz but requires stable supply during SERCOM bursts; missing decoupling can cause corrupted UART/SPI packets. For battery-powered designs, route the EP to GND first and avoid split planes under the package.
Estimated: At maximum CPU load (32 MHz, all peripherals active, VDD=3.3V), the SAM L11 typically dissipates 30-40 mW, well below the 24-VQFN's thermal limit. However, in sealed enclosures with no airflow, junction-to-ambient thermal resistance of 35 C/W combined with industrial ambient at +85 C still leaves thermal headroom above +125 C junction. No external heatsink is required for normal operation; the EP provides adequate thermal spreading through the GND plane.
Plan the TrustZone-M secure/non-secure memory partition before writing code. The linker script must define the NSC (Non-Secure Callable) region for any function callable from non-secure code. Forgetting to mark a function as __attribute__((cmse_nonsecure_entry)) results in hard-fault at runtime. Also, the secure boot fuse bits are OTP - confirm your application boots correctly in development before programming production fuses.
Route SWDIO and SWCLK signals to programming header with traces no longer than 50 mm to avoid signal integrity issues during debug. Keep SERCOM lines away from the DC-DC switching node if present - the 32 MHz core generates harmonics that can couple into sensitive analog lines. The exposed pad (pin 24) should be soldered to a 3x3 mm GND pour with at least 8 thermal vias (0.3 mm drill) for thermal and electrical performance.
Compliance Information
RoHS and lead-free per Microchip product page. AEC-Q100 not specifically qualified per Microchip SAM L11 family datasheet; automotive variants use different suffix.
