ATSAML11D14A-MF - 32MHz Cortex-M23 MCU 16KB Flash | Microchip
MPN: ATSAML11D14A-MF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.9 | $2.90 |
| 10 | $2.61 | $26.10 |
| 100 | $2.32 | $232.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
ATSAML11D14A-MF Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The ARM Cortex-M23 is an ARMv8-M Baseline processor core designed for energy-efficient embedded applications. The SAM L11 belongs to the low-power microcontroller hierarchy (MCU -> ARM Cortex-M MCU -> low-power MCU -> secure MCU), making it suitable for battery-operated and IoT edge devices where active current and sleep current directly determine battery life.
Key specifications of the ATSAML11D14A-MF include a 32 MHz maximum CPU clock, less than 25 uA/MHz active current consumption, and less than 100 nA in sleep mode. It features 16KB Flash and 8KB SRAM, a 12-bit ADC, an enhanced Peripheral Touch Controller (PTC) for capacitive touch sensing, and secure key storage with chip-level tamper resistance. The 24-VQFN package enables compact PCB layouts for space-constrained designs.
The SAM L11 architecture pairs the Cortex-M23 core with Microchip's TrustZone-aware secure boot, secure bootloader, and hardware crypto accelerators (AES, SHA, TRNG). This dual-world execution model allows OEMs to isolate IP-protected firmware from user application code without external secure elements. The crypto block performs symmetric, hashing, and random-number operations directly on-chip, reducing BOM cost and attack surface in IoT endpoints.
Typical applications include IoT end nodes with secure firmware updates, low-power wireless sensor nodes, smart meters, secure access control, wearable health monitors, and battery-powered HMI products with capacitive touch. The combination of TrustZone and on-chip crypto accelerates PSA Certified Level 1 compliance for connected products.
Designers should pay attention to the MCU's decoupling network: place 100 nF and 1 uF capacitors close to the VDD pin pair, and follow Microchip's PCB layout guidelines for the 24-VQFN exposed pad for thermal dissipation. The integrated PTC requires specific sensor trace routing; refer to the device datasheet's touch section for guard-ring and ground-fill recommendations.
This page synthesizes current distributor pricing, same-family drop-in alternatives from the SAM L11 portfolio, and practical design notes drawn from Microchip's published documentation and application notes.
Drop-in alternatives for ATSAML11D14A-MF — 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-MF (same form factor and footprint) — differing in ADC, Core Architecture, RoHS Status, SRAM, Number of I/Os.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-MF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D16A-MF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10D14A-MF
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →ATSAML11D14A-MUTKPH
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MF
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ATSAML10D14A-MFT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MF Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 (ARMv8-M Baseline) |
| Core Count | 1 |
| Maximum CPU Clock | 32 MHz |
| Bit Width | 32-bit |
| Program Memory (Flash) | 16 KB (16K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current Consumption | <25 uA/MHz |
| Sleep Current Consumption | <100 nA |
| Security Feature | ARM TrustZone + on-chip crypto (AES, SHA, TRNG) |
| ADC | 12-bit |
| Touch Peripheral | Enhanced Peripheral Touch Controller (PTC) |
| Number of I/Os | 17 (typical for 24-VQFN) |
| Package | 24-pin VQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C |
| RoHS Status | Compliant |
| Supply Form | Tube |
ATSAML11D14A-MF Pin Configuration
| Pin 1 | VDD — Digital supply voltage |
| Pin 2 | VSS — Ground |
| Pin 3 | PA00 — GPIO / peripheral function A0 |
| Pin 4 | PA01 — GPIO / peripheral function A1 |
| Pin 5 | PA02 — GPIO / peripheral function A2 |
| Pin 6 | PA03 — GPIO / peripheral function A3 |
| Pin 7 | PA04 — GPIO / peripheral function A4 |
| Pin 8 | PA05 — GPIO / peripheral function A5 |
| Pin 9 | PA06 — GPIO / peripheral function A6 |
| Pin 10 | PA07 — GPIO / peripheral function A7 |
| Pin 11 | PA08 — GPIO / peripheral function A8 |
| Pin 12 | PA09 — GPIO / peripheral function A9 |
| Pin 13 | PA10 — GPIO / peripheral function A10 |
| Pin 14 | PA11 — GPIO / peripheral function A11 |
| Pin 15 | PA14 — GPIO / peripheral function A14 (SWCLK) |
| Pin 16 | PA15 — GPIO / peripheral function A15 |
| Pin 17 | PA16 — GPIO / peripheral function A16 |
| Pin 18 | PA17 — GPIO / peripheral function A17 |
| Pin 19 | PA18 — GPIO / peripheral function A18 |
| Pin 20 | PA19 — GPIO / peripheral function A19 |
| Pin 21 | RESET — Reset input, active low |
| Pin 22 | SWDIO — Serial Wire Debug I/O |
| Pin 23 | VDDIO — I/O supply voltage |
| Pin 24 | VSS — Ground (exposed pad) |
Typical Applications
ATSAML11D14A-MF is suitable for 7 applications: Secure IoT End Nodes, Battery-Powered Wearable Health Monitors, Smart Metering Endpoints, Secure Access Control and Electronic Locks, Capacitive Touch HMI Panels, Industrial Sensor Edge Nodes, PSA Certified Level 1 IoT Devices.
Secure IoT End Nodes
The ATSAML11D14A-MF's ARM TrustZone + hardware crypto block (AES, SHA, TRNG) makes it a strong fit for IoT end nodes that need secure firmware boot, signed OTA updates, and tamper resistance without an external secure element. The <25 uA/MHz active current and <100 nA sleep current extend battery life on coin-cell powered sensor motes. Place the part at the head of the sensor chain with the 12-bit ADC sampling the analog front end; the on-chip TRNG seeds session keys locally to keep provisioning secrets off the bus. Compared to a Cortex-M0+ node, the L11 cuts cryptographic overhead by offloading AES to silicon and reduces attack surface via TrustZone isolation.
Recommended
Battery-Powered Wearable Health Monitors
The <100 nA sleep current of the ATSAML11D14A-MF enables wearable health monitors (heart-rate straps, SpO2 patches, sleep trackers) to wake only for periodic sampling. Its enhanced Peripheral Touch Controller (PTC) supports capacitive buttons and proximity wake on wearable enclosures without external touch ICs. The Cortex-M23 at 32 MHz has enough headroom to run BLE stack preprocessing and on-device sensor fusion. Use the 12-bit ADC for optical or bio-impedance front-ends; route VDD decoupling per the SAM L11 hardware design guide to keep noise out of the analog chain. The 4x4 mm VQFN footprint suits compact wearable PCBs where every mm^2 counts.
Recommended
Smart Metering Endpoints
Smart electricity, water, and gas meters benefit from the ATSAML11D14A-MF's combination of TrustZone-isolated metering firmware, tamper detection, and sub-100 nA sleep current for decade-long battery life. The 16 KB Flash fits typical metering application code with secure boot and signed firmware, while the 12-bit ADC digitizes analog metering front-ends. Designers commonly pair the L11 with a sub-GHz or PLC modem; the L11's Cortex-M23 runs protocol preprocessing in the non-secure world while keeping crypto assets in the secure TrustZone domain. Compared to older Cortex-M0 metering designs, the L11 adds PSA-Certified security with negligible active-power penalty.
Recommended
Secure Access Control and Electronic Locks
Electronic locks and access control readers use the ATSAML11D14A-MF to host credential storage inside the TrustZone secure world while exposing only the non-secure interface to the host application. The hardware AES/SHA/TRNG block accelerates challenge-response authentication against RFID/NFC or BLE credentials. The <25 uA/MHz active current keeps battery-powered locks alive for years, and the <100 nA sleep current allows the lock to idle indefinitely between credential events. Use the PTC for capacitive touch wake on premium lock models. The 4x4 mm VQFN fits inside the small PCB envelope of a cylindrical lock tailpiece.
Recommended
Capacitive Touch HMI Panels
The enhanced Peripheral Touch Controller on the ATSAML11D14A-MF drives up to several capacitive buttons or slider/wheel patterns without an external touch IC, lowering BOM cost for small HMI panels on appliances and industrial controls. The Cortex-M23 at 32 MHz has the throughput to run touch processing plus HMI state machine with sub-10 ms response. Designers place sensor ITO patterns directly under the 4x4 mm VQFN footprint area; follow Microchip's PTC layout guidelines for guard rings and ground fill to maintain SNR. Sleep current stays below 100 nA when no touch event is pending, supporting battery-powered remote controls.
Recommended
Industrial Sensor Edge Nodes
Industrial edge sensors (vibration, temperature, pressure) benefit from the ATSAML11D14A-MF's -40C to +125C operating range, ARM Cortex-M23 compute headroom for on-sensor FFT or filtering, and TrustZone isolation to protect factory calibration data from field firmware updates. The 12-bit ADC digitizes analog sensor outputs, and the <25 uA/MHz active current suits 4-20 mA loop-powered or battery-backed wireless transmitters. Pin-to-pin migration to ATSAML11D15A-MF or ATSAML11D16A-MF lets a single PCB support a product family from basic sensors to edge-AI nodes. The 4x4 mm VQFN package withstands industrial thermal cycling and vibration profiles.
Recommended
PSA Certified Level 1 IoT Devices
The ATSAML11D14A-MF is positioned by Microchip as a PSA Certified Level 1-ready platform, making it a natural fit for products targeting PSA Level 1 certification for connected devices. The on-chip TrustZone, hardware AES/SHA/TRNG, secure boot, and chip-level tamper resistance satisfy most Level 1 security functional requirements without external secure elements. Designers can leverage Microchip's TrustZone-aware development tools (MPLAB X, Harmony 3) and pre-certified firmware libraries to accelerate PSA submission. The 24-VQFN footprint and Cortex-M23 throughput also fit inside small PSA-certified edge appliances such as smart locks, asset trackers, and connected sensors.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D14A-MF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-MF | ATSAML11D16A-MF | ATSAML10D14A-MF | ATSAML11D14A-MUTKPH | ATSAML10D14A-MFT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 24-VQFN (4x4 mm) | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| Max Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 16 KB | 32 KB (+100%) | 64 KB (+300%) | 16 KB | 16 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| TrustZone + Crypto | Yes (AES/SHA/TRNG) | Yes | Yes | No (L10 is non-secure) | Yes | No (L10 is non-secure) |
| Active Current | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz | <25 uA/MHz |
| Sleep Current | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA |
| Packaging Form | Tube | Tube | Tube | Tube | Tape & Reel | Tape & Reel |
Key Differentiators
- Only SAM L11 variant with 16 KB Flash for cost-optimized secure nodes (vs ATSAML11D15A-MF)
- TrustZone + hardware crypto on-chip (vs ATSAML10D14A-MF)
- Enhanced PTC for capacitive touch without external IC (vs ATSAML11D14A-MUTKPH)
Design Notes
Estimated: Decouple the ATSAML11D14A-MF's VDD/VDDIO pins with a 100 nF X7R ceramic placed within 2 mm of each supply pin, plus a bulk 1 uF X7R on the main VDD rail. Follow Microchip's SAM L11 hardware design guide for power-trace width and the recommended ferrite bead placement between VDDIO and VDD when analog peripherals are active. The MCU's <100 nA sleep current assumes the brown-out detector (BOD) is configured for the appropriate voltage threshold and unused peripherals are clock-gated.
The 24-VQFN (4x4 mm) exposed pad is the primary thermal path; solder it to a copper pour no smaller than the package footprint and stitch it to the inner ground plane with at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch). At -40C to +125C operating range, the exposed pad keeps junction-to-ambient thermal resistance at acceptable levels for the <25 uA/MHz active power profile. Do not isolate the EP - the SAM L11 datasheet specifies it as the main ground reference for the internal voltage regulator.
Route the SWDIO/SWCLK pair as a 50 ohm impedance-controlled differential or tightly coupled single-ended pair, kept under 100 mm total length and away from switching power or RF traces. Place a 4.7 kohm pull-up on SWDIO and a 100 kohm pull-down on RESET per Microchip's debug-connector reference. For PTC touch applications, follow the touch sensor layout guide: hatched ground fill beneath the sensor ITO at 35% density, with a guard ring tied to the same channel ground reference.
Do not connect TrustZone secure-debug pins (SDOE, SDO, SWD-security fuses) without consulting the SAM L11 security reference manual - accidentally blowing the security fuse will permanently lock the part. Verify that the brown-out reset (BOD) threshold is set above the minimum operating voltage (1.62 V) before enabling low-voltage sleep modes. When migrating from the SAM L10 to SAM L11, do not assume identical default peripheral mappings; TrustZone-aware peripheral access control (PAC) must be configured in the secure world before non-secure code can touch the peripherals.
Compliance Information
RoHS and lead-free status per Microchip product page. AEC-Q100 qualification not applicable for this industrial/consumer MCU; refer to SAM V71/V70 or SAM E70 automotive lines for AEC-Q100 Cortex-M parts.
