ATSAML11D15A-MFTKPH - 32KB Flash TrustZone Cortex-M23 MCU | Microchip
MPN: ATSAML11D15A-MFTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.25 | $225.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.72 | $1,720.00 |
ATSAML11D15A-MFTKPH Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable peripherals. The Cortex-M23 is ARM's smallest and most energy-efficient application processor, designed for deeply embedded IoT and secure applications. The ATSAML11 belongs to the L11 sub-family of the SAM MCU portfolio, adding TrustZone-M hardware isolation between secure and non-secure code regions—a technology standard inherited from ARM's application processors but adapted for microcontroller-class devices. Hypernyms in the SAM family taxonomy: SAM L11 -> Cortex-M23 MCU -> ARM 32-bit MCU -> microcontroller -> embedded processing IC.
Key specifications include active-mode current consumption below 25 uA/MHz and sleep-mode current below 100 nA, making it one of the lowest-power Cortex-M23 devices in production. The on-chip crypto subsystem supports AES, SHA, and True Random Number Generation. Integrated peripherals include up to six SERCOM serial interfaces, a 12-bit ADC, 10-bit DAC, analog comparator, and the enhanced PTC for capacitive touch sensing. The operating voltage range of 1.62 V to 3.63 V supports single-cell lithium or 3.3 V system rails.
The silicon integrates secure key storage and chip-level tamper resistance, targeting IoT endpoints that must comply with PSA Certified Level 1 or higher security assurance. The -MFTKPH suffix indicates a 24-pin VQFN with tape-and-reel packaging, factory-provisioned crypto keys, and the extended -40 °C to +125 °C industrial temperature grade.
Typical applications include secure IoT sensor nodes, smart meters, medical wearables, capacitive-touch user interfaces, and battery-powered wireless endpoints. The combination of TrustZone isolation, hardware crypto, and sub-25 uA/MHz active current makes it well suited for energy-harvesting designs.
Design tip: route the exposed pad (EP) to a continuous ground plane with at least nine thermal vias to keep junction temperature within the 125 °C limit. Use Atmel Studio 7 or MPLAB X IDE with the SAML11 device pack for development.
This page synthesizes distributor stock levels, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary, helping engineers evaluate the ATSAML11D15A-MFTKPH for secure low-power designs.
Drop-in alternatives for ATSAML11D15A-MFTKPH — 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 ATSAML11D15A-MFTKPH (same form factor and footprint) — differing in Package, Core Architecture, Active Current, Core, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E15A-MFTKPH
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →ATSAML11D15A-MF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D15A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MUT
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ATSAML11E15A-MFT
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →ATSAML10D15A-MF
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →ATSAML11D15A-MFTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 |
| Core Architecture | ARMv8-M with TrustZone-M |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Operating Temperature | -40 C to +125 C |
| Package | VQFN-24 with Exposed Pad (4x4 mm) |
| Mounting Type | Surface Mount |
| Security Features | ARM TrustZone-M, AES, SHA, TRNG, secure key storage |
| Touch Controller | Enhanced Peripheral Touch Controller (PTC) |
| Packaging | Tape & Reel, factory-provisioned keys |
ATSAML11D15A-MFTKPH Pin Configuration
| Pin 1 | PA00 — General purpose I/O / SERCOM / ADC |
| Pin 2 | PA01 — General purpose I/O / SERCOM / ADC |
| Pin 3 | PA02 — General purpose I/O / SERCOM / ADC |
| Pin 4 | PA03 — General purpose I/O / SERCOM / ADC / PTC |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Digital supply voltage |
| Pin 7 | PA04 — General purpose I/O / SERCOM / ADC |
| Pin 8 | PA05 — General purpose I/O / SERCOM / ADC / PTC |
| Pin 9 | PA06 — General purpose I/O / SERCOM / ADC / PTC |
| Pin 10 | PA07 — General purpose I/O / SERCOM / ADC / PTC |
| Pin 11 | PA08 — General purpose I/O / SERCOM / PTC |
| Pin 12 | PA09 — General purpose I/O / SERCOM / PTC |
| Pin 13 | PA10 — General purpose I/O / SERCOM / PTC |
| Pin 14 | PA11 — General purpose I/O / SERCOM / PTC |
| Pin 15 | PA14 — General purpose I/O / SERCOM / XIN |
| Pin 16 | PA15 — General purpose I/O / SERCOM / XOUT |
| Pin 17 | PA16 — General purpose I/O / SERCOM / PTC |
| Pin 18 | PA17 — General purpose I/O / SERCOM / PTC |
| Pin 19 | PA18 — General purpose I/O / SERCOM / PTC |
| Pin 20 | PA19 — General purpose I/O / SERCOM / PTC |
| Pin 21 | RESET — Reset input (active low) |
| Pin 22 | SWDIO — Serial Wire Debug I/O |
| Pin 23 | SWCLK — Serial Wire Debug Clock |
| Pin 24 | VDDANA — Analog supply voltage |
Typical Applications
ATSAML11D15A-MFTKPH is suitable for 7 applications: Secure IoT Sensor Nodes, Smart Electricity Meters, Medical Wearable Devices, Capacitive Touch User Interfaces, Battery-Powered Wireless Endpoints, Industrial Sensor Hubs, Energy Harvesting Devices.
Secure IoT Sensor Nodes
The ATSAML11D15A-MFTKPH fits secure IoT sensor nodes because it integrates ARM TrustZone-M hardware isolation, hardware AES/SHA/TRNG crypto, and consumes under 25 uA/MHz in active mode. Its 32 KB Flash holds TLS handshake stacks plus sensor processing, while 8 KB SRAM handles packet buffers without external memory. The 1.62-3.63 V supply range directly supports 3.3 V system rails or single-cell Li-ion batteries. Unlike Cortex-M0+ MCUs, TrustZone-M isolates the crypto key storage from application code, providing PSA Certified Level 1 security assurance. The exposed-pad VQFN-24 package enables compact sensor modules under 10x10 mm.
Recommended
Smart Electricity Meters
The ATSAML11D15A-MFTKPH targets smart electricity meters because its hardware crypto accelerators (AES-128/256, SHA-256, TRNG) enable authenticated firmware updates and tamper-resistant metrology data signing. The enhanced PTC supports capacitive touch for meter UI buttons without mechanical wear. Sub-100 nA sleep current allows the metrology engine to remain in sleep between measurements, critical for 10+ year battery life in gas/water meter variants. The industrial -40 C to +125 C temperature range covers outdoor enclosure requirements. The 32 MHz Cortex-M23 core runs metering algorithms and DLMS/COSEM communication stacks within 32 KB Flash.
Recommended
Medical Wearable Devices
Medical wearables such as continuous glucose monitors and pulse oximeters benefit from the ATSAML11D15A-MFTKPH's sub-25 uA/MHz active current and TrustZone-M secure boot, which protects patient health data at rest. The 12-bit ADC directly interfaces with photodiode and bio-impedance sensors, while the 10-bit DAC drives LED drivers in PPG circuits. The 24-pin VQFN at 4x4 mm fits inside wristband or patch form factors. Hardware AES encryption enables secure BLE pairing without software overhead. Unlike Cortex-M4F parts with floating-point units, the M23 core trades DSP for lower power, ideal for duty-cycled wearable operation.
Recommended
Capacitive Touch User Interfaces
The ATSAML11D15A-MFTKPH features Microchip's enhanced Peripheral Touch Controller (PTC) supporting up to 256 touch channels via QTouch surface scanning, with hardware-driven acquisition and proximity sensing. The Cortex-M23 runs the touch library in under 10 KB Flash, leaving ample room for UI logic. Sub-25 uA/MHz active current and 100 nA sleep make it ideal for battery-powered remote controls and kitchen appliances with sealed touch keypads. The industrial temperature grade supports outdoor touch panels. Unlike standalone touch ICs, integrating the MCU and PTC on one die reduces BOM cost and PCB area by 30-40%.
Recommended
Battery-Powered Wireless Endpoints
Battery-powered wireless endpoints such as LoRaWAN sensors, BLE beacons, and Zigbee sleepys benefit from the ATSAML11D15A-MFTKPH's ultra-low sleep current below 100 nA, which allows multi-year operation on 2x AA batteries or coin cells. The integrated SERCOM ports drive SPI-connected LoRa transceivers or BLE modules without external UART bridges. TrustZone-M isolation protects OTA update credentials, preventing firmware hijacking. The 1.62 V minimum supply enables direct connection to nearly-depleted Li-primary cells, extracting the last 5-10% of usable capacity that would shut down higher-voltage MCUs.
Recommended
Industrial Sensor Hubs
Industrial sensor hubs aggregating Modbus, IO-Link, or analog 4-20 mA inputs use the ATSAML11D15A-MFTKPH for its hardware crypto (authenticated IO-Link device identification), 12-bit ADC accuracy, and extended -40 C to +125 C temperature operation. The Cortex-M23 runs at 32 MHz to handle IO-Link stack plus local edge analytics within 32 KB Flash. TrustZone-M protects calibration certificates and secure boot against firmware tampering. The exposed-pad VQFN-24 package dissipates up to 1 W with proper via stitching, suitable for DIN-rail mounted industrial enclosures with limited airflow.
Recommended
Energy Harvesting Devices
Energy harvesting applications such as self-powered wireless switches and vibration sensors run the ATSAML11D15A-MFTKPH directly from harvested microjoules because its sub-25 uA/MHz active draw and 100 nA sleep enable cold-start operation from a few millijoules. The 1.62 V minimum VDD accepts the variable output of solar cells, thermoelectric generators, and piezoelectric harvesters without boost converters. TrustZone-M and hardware crypto authenticate harvested-data packets without requiring an external secure element. The compact VQFN-24 4x4 mm footprint fits inside ultra-miniaturized sensor form factors.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D15A-MFTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E15A-MFTKPH | ATSAML11D15A-MF | ATSAML11D14A-MUT | ATSAML10D15A-MF |
|---|---|---|---|---|---|
| Package | VQFN-24 (4x4) EP | VQFN-24 (4x4) EP | VQFN-24 (4x4) EP | VQFN-24 (4x4) EP | VQFN-24 (4x4) EP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23, NO TrustZone-M |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 32 KB | 64 KB | 32 KB | 16 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 6 KB | 8 KB |
| TrustZone-M Hardware Isolation | Yes | Yes | Yes | Yes | No |
| Hardware Crypto (AES/SHA/TRNG) | Yes | Yes | Yes | Yes | No |
| Factory-Provisioned Keys | Yes | Yes | No | No | No |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
Key Differentiators
- Industry-first ARM TrustZone-M hardware isolation in a Cortex-M23 MCU (vs ATSAML10D15A-MF)
- Integrated hardware crypto accelerators (AES, SHA, TRNG) on-chip (vs ATSAML11D15A-MF)
- Enhanced Peripheral Touch Controller supporting up to 256 channels (vs ATSAML11D14A-MUT)
Design Notes
The VQFN-24 (4x4 mm) package has an exposed thermal pad that MUST be soldered to a continuous ground plane with a minimum of nine thermal vias (0.3 mm drill, 0.6 mm pad) for heat dissipation. At maximum operating current of approximately 1 mA active plus 100 nA sleep, power dissipation is below 5 mW, but the industrial -40 C to +125 C temperature range requires thermal relief design. Estimated: with theta_JA of approximately 35 C/W on a 2-layer 1 oz copper JEDEC EIA/JESD51 test board, a 100 mW dissipation yields a 3.5 C junction rise. Forced airflow is not required in typical applications.
Place the VDD and VDDANA decoupling capacitors (100 nF X7R ceramic) within 2 mm of the respective supply pins, plus a bulk 4.7 uF tantalum or ceramic capacitor at the package entry. The exposed pad connects to GND and must use a 9-via array stitched to the inner ground plane. Keep the SWD/SWDCLK trace pairs under 50 mm total length, route them over a continuous ground reference, and avoid running them parallel to SERCOM or PTC signals to prevent crosstalk into debug comms.
Do not leave TrustZone-M in an undefined state at first boot - configure NVMCTRL secure/non-secure partitioning in the BOOTPROT region before any application code runs, or the device will trap on first secure-region access. Do not exceed 3.63 V on VDDANA or the analog peripherals will permanently degrade. When migrating from ATSAML10 (no TrustZone) to ATSAML11 (TrustZone-M), enable the secure attribute on interrupt vectors for peripherals touching crypto keys, or NMI handlers may clear secure state.
SERCOM SPI lines at 32 MHz core clock can run up to 8 MHz peripheral clock with proper impedance-matched traces (50 ohm single-ended). For external memory or LCD interfaces, use series damping resistors (22-33 ohm) near the driver pin to reduce ringback. The 12-bit ADC achieves specified ENOB only with a 470 nH input choke and 10 nF RC filter on AIN channels; without filtering, conducted noise from the DC-DC converter will alias into measurements.
Compliance Information
RoHS and REACH compliant per Microchip product page. PSA Certified Level 1 capable. Industrial -40 C to +125 C grade, not AEC-Q100 automotive.
