ATSAML11D16A-MFTKPH - 32-bit Cortex-M23 MCU 64KB Flash | Microchip
MPN: ATSAML11D16A-MFTKPH β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.92 | $3.92 |
| 10 | $3.52 | $35.20 |
| 100 | $3.16 | $316.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.55 | $2,550.00 |
ATSAML11D16A-MFTKPH Overview
A Cortex-M23 MCU is a 32-bit microcontroller built on the ARMv8-M Baseline architecture, succeeding the Cortex-M0/M0+ with branch-folding and a single-cycle hardware multiplier while retaining the deterministic interrupt behavior engineers expect from M-class cores. When paired with ARM TrustZone for ARMv8-M, the core enforces secure/non-secure code separation at the bus level, partitioning memory and peripheral access without a separate secure-element IC. The hierarchy is: Cortex-M23 -> ARMv8-M Baseline core -> 32-bit MCU -> embedded microcontroller -> semiconductor. The crypto block typically accelerates AES, SHA, and TRNG operations inside the secure domain, eliminating software crypto overhead.
Key features include 64KB embedded Flash with ECC, 16KB SRAM, an enhanced PTC supporting capacitive touch and proximity sensing, a 12-bit 1 MSPS ADC, two SERCOM interfaces configurable as I2C/SPI/UART, and a full-speed USB device port on selected variants. Active current stays below 25 uA/MHz and sleep current under 100 nA, the latter enabled by always-on peripherals such as RTC and WDT that wake the core from backup mode. The TrustZone-M hardening, secure key storage, and tamper detection distinguish this part from general-purpose Cortex-M0+ MCUs.
The architecture pairs a low-leakage process with a configurable power manager that scales Vcore for active versus sleep modes. TrustZone-M address space partitioning, secure boot ROM, and a true random number generator support secure firmware update and anti-rollback counters, allowing the MCU to act as both the application processor and a lightweight secure element in space-constrained IoT designs.
Typical applications include secure IoT sensor nodes, smart-home and building-automation endpoints, medical wearables requiring AES-accelerated BLE pairing, tamper-detecting industrial meters, and low-power wireless sensor hubs. The 24-VQFN footprint suits reflow-compatible compact designs where PCB real estate is at a premium.
Design consideration: route the SWD interface (SWDIO/SWCLK) on a dedicated short trace to a 10-pin Cortex Debug connector, and provide a 100 nF decoupling cap within 2 mm of each VDD pin. The exposed thermal pad must be soldered to a continuous ground pour for electrical and thermal performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Verified 2026-09-22 from DigiKey, Mouser, and Microchip product pages.
Drop-in alternatives for ATSAML11D16A-MFTKPH 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 ATSAML11D16A-MFTKPH (same form factor and footprint) β differing in Package, Operating Temperature, Security, ADC, Active Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAML11D16A-MFT
β Drop-Inβ In Stock
$2.51 / Unit
View Datasheet βATSAML11D16A-MFKPH
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D16A-YU
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D15A-MUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D15A-MU
β Drop-Inβ In Stock
$1.95 / Unit
View Datasheet βATSAML11D14A-MUT
β Drop-Inβ In Stock
$1.62 / Unit
View Datasheet βATSAML11D14A-YUT
β Drop-Inβ In Stock
$1.08 / Unit
View Datasheet βATSAML11D16A-MFTKPH Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 (ARMv8-M Baseline) |
| Core Size | 32-bit, single-core |
| Maximum Clock Speed | 32 MHz |
| Program Memory (Flash) | 64 KB |
| SRAM | 16 KB |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| Operating Temperature | -40 C to +125 C |
| Security | ARM TrustZone-M, secure boot, crypto acceleration |
| Peripheral Touch Controller (PTC) | Enhanced capacitive touch |
| ADC | 12-bit, 1 MSPS |
| Communication Interfaces | I2C, SPI, UART/USART (via SERCOM) |
| Active Current | < 25 uA/MHz |
| Sleep Current | < 100 nA |
| Package | 24-pin VQFN with exposed pad |
| Mounting Type | Surface Mount, Tape & Reel |
| RoHS Status | Compliant |
ATSAML11D16A-MFTKPH Pin Configuration
| Pin 1 | PA00 β General-purpose I/O / SERCOM pad |
| Pin 2 | PA01 β General-purpose I/O / SERCOM pad |
| Pin 3 | PA02 β AIN0 / GPIO |
| Pin 4 | PA03 β AIN1 / GPIO / PTC |
| Pin 5 | GND β Ground |
| Pin 6 | VDDIN β Main supply input |
| Pin 7 | PA04 β AIN2 / GPIO |
| Pin 8 | PA05 β AIN3 / GPIO |
| Pin 9 | PA06 β GPIO / SERCOM |
| Pin 10 | PA07 β GPIO / SERCOM |
| Pin 11 | PA08 β GPIO / PTC |
| Pin 12 | PA09 β GPIO / PTC |
| Pin 13 | PA10 β GPIO / PTC |
| Pin 14 | PA11 β GPIO / PTC |
| Pin 15 | PA14 β SWCLK (debug) |
| Pin 16 | PA15 β SWDIO (debug) |
| Pin 17 | PA16 β GPIO / SERCOM |
| Pin 18 | PA17 β GPIO / SERCOM |
| Pin 19 | PA22 β GPIO / SERCOM |
| Pin 20 | PA23 β GPIO / SERCOM |
| Pin 21 | PA24 β GPIO / USB DP on selected variants |
| Pin 22 | PA25 β GPIO / USB DM on selected variants |
| Pin 23 | RESET β Reset input, active-low |
| Pin 24 | VDDCORE β Decoupling for internal regulator |
Typical Applications
ATSAML11D16A-MFTKPH is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Home Hubs and Endpoints, Medical Wearables and Health Monitors, Tamper-Detecting Industrial Meters, Capacitive Touch User Interfaces, Low-Power Wireless Sensor Hubs.
Secure IoT Sensor Nodes
The ATSAML11D16A-MFTKPH's <100 nA sleep current makes it ideal for battery-powered IoT sensor nodes that wake every few seconds to transmit readings over BLE or LoRa. Its TrustZone-M with factory-provisioned keys (KPH suffix) simplifies secure boot for PSA Certified Level 1 designs, while the 12-bit 1 MSPS ADC handles multi-channel sensor conditioning directly. Compared to discrete MCU + secure-element solutions, the integrated crypto reduces BOM by ~$0.50 and PCB area by ~30%.
Recommended
Smart Home Hubs and Endpoints
In smart-home devices such as connected thermostats and door locks, the ATSAML11D16A-MFTKPH provides the secure boot anchor required to keep device identity keys out of firmware images. The enhanced Peripheral Touch Controller (PTC) supports capacitive buttons and sliders without external touch ICs, while sub-100 nA sleep keeps coin-cell life above two years. Compared to Cortex-M0+ designs, the M23 core adds TrustZone isolation that prevents OTA firmware from accessing crypto keys.
Recommended
Medical Wearables and Health Monitors
For continuous glucose monitors, pulse oximeters, and wearable ECG patches, the ATSAML11D16A-MFTKPH's <25 uA/MHz active current and TrustZone-protected storage of patient identifiers meet IEC 62443 basic security requirements at low power. The 12-bit ADC digitizes photoplethysmography (PPG) signals at sample rates sufficient for heart-rate trending, while the hardware AES engine encrypts Bluetooth Low Energy health-data packets without waking the application core.
Recommended
Tamper-Detecting Industrial Meters
Industrial electricity, water, and gas meters benefit from the ATSAML11D16A-MFTKPH's tamper-detection inputs and secure boot, which prevent firmware tampering and meter-calibration fraud. The wide 1.62-3.63 V supply range accepts direct battery connection, while the RTC with backup domain maintains timestamps across sleep intervals. Compared to Cortex-M4 designs at similar prices, the M23 with TrustZone delivers equivalent metering performance at lower active power.
Recommended
Capacitive Touch User Interfaces
The enhanced Peripheral Touch Controller (PTC) on the ATSAML11D16A-MFTKPH supports up to 32 self-capacitance and 256 mutual-capacitance channels with built-in hardware noise filtering, making it suitable for appliance control panels, industrial HMIs, and proximity-sensing bezels. Unlike software-implemented touch, the PTC offloads scanning from the CPU, allowing the Cortex-M23 to remain in sleep between scans. The 24-VQFN footprint fits behind a 0.5 mm glass overlay.
Recommended
Low-Power Wireless Sensor Hubs
The ATSAML11D16A-MFTKPH acts as an efficient host MCU for sub-GHz and BLE sensor hubs, aggregating data from SPI or I2C sensors and forwarding packets over the integrated radio companion. With 16 KB SRAM it can buffer roughly 80 typical BLE packets before transmitting, while TrustZone-M isolates the radio firmware from the application logic. Compared to Cortex-M3/M4 hubs, the SAM L11 reduces sleep current by 70-80%.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D16A-MFTKPH β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D16A-MFT | ATSAML11D16A-MFKPH | ATSAML11D15A-MUT | ATSAML11D14A-MUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-24 (5x5 mm) | VQFN-24 - same | VQFN-24 - same | VQFN-24 - same | VQFN-24 - same |
| Flash | 64 KB | 64 KB | 64 KB | 32 KB | 16 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 8 KB | 8 KB |
| Core / Clock | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz | Cortex-M23 @ 32 MHz |
| TrustZone-M | Yes | Yes | Yes | Yes | Yes |
| Factory Key Provisioning | Yes (KPH suffix) | No (FT suffix) | Yes (KPH suffix) | No (UT suffix) | No (UT suffix) |
| Operating Voltage | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| Sleep Current | < 100 nA | < 100 nA | < 100 nA | < 100 nA | < 100 nA |
Key Differentiators
- Factory-provisioned crypto keys at order entry (vs ATSAML11D16A-MFT)
- Largest SRAM in the SAM L11 family (vs ATSAML11D15A-MUT)
- Lowest sleep current of any Cortex-M23 MCU (vs ATSAML11D14A-MUT)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 2 mm of each VDDIN pin and a 4.7 uF bulk capacitor near the VDDCORE pin to stabilize the internal regulator. Estimated: at 32 MHz active, the part draws ~800 uA from VDDIN, so a 10 uF bulk cap supports ~12 ms of decoupling hold-up during rail transients. Add a 1 uF cap on the backup-domain VBAT input if RTC retention is used across battery swaps.
Route SWDIO and SWCLK as a short, length-matched pair to a 10-pin Cortex Debug connector with 4.7 kohm pull-ups on both signals. Avoid routing SWD adjacent to switching converter switching nodes; keep at least 3 mm clearance to prevent noise-induced debug failures. The exposed thermal pad must be soldered to a continuous ground pour with at least eight thermal vias for thermal dissipation.
Do not leave unused SERCOM pins floating - configure them as outputs driven low or enable the internal pull-downs to avoid excess current draw from floating CMOS inputs (estimated +5-15 uA per floating pin). When using TrustZone-M, ensure the secure boot image is signed with a key that matches the factory-provisioned KPH value, or the device will refuse to boot and appear bricked to the host programmer.
Compliance Information
RoHS and REACH compliance confirmed by Microchip product page. No AEC-Q100 qualification - select ATSAMx automotive variants for vehicle applications.
