ATSAML11E16A-MFTKPH - 32-bit Cortex-M23 MCU 64KB Flash | Microchip
MPN: ATSAML11E16A-MFTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.32 | $3,320.00 |
ATSAML11E16A-MFTKPH Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and peripherals. The Cortex-M23 is an ARMv8-M Baseline processor designed for energy-efficient embedded applications, featuring TrustZone for hardware-isolated secure and non-secure code execution. In the broader taxonomy, the ATSAML11E16A fits under 32-bit MCU -> ARM Cortex-M -> secure low-power MCU -> IoT edge controller, serving as the central processing element in battery-powered and security-conscious designs.
Key features of the ATSAML11E16A-MFTKPH include 64KB Flash, 8KB SRAM, ARM TrustZone-M, secure key storage, chip-level tamper resistance, enhanced Peripheral Touch Controller (PTC) for capacitive touch interfaces, and a wide operating voltage range from 1.62V to 3.63V supporting both 1.5V and 3.3V system rails. The device integrates multiple low-power modes, a 12-bit ADC, SERCOM serial communication peripherals, and crypto accelerators for secure boot and authenticated firmware updates.
Technically, the ATSAML11E16A uses a single-cycle hardware multiplier, an M-profile Vector Table Offset Register for interrupt handling, and a low-power RTC with calendar mode. TrustZone-M partitions Flash and SRAM into secure and non-secure regions, enforced by hardware, which prevents non-secure code from reading secure memory. The enhanced PTC supports up to 256 channels of mutual-capacitance or self-capacitance touch sensing, enabling waterproof touch buttons and proximity wake-up from deep sleep.
Typical applications include IoT end nodes, secure sensor hubs, smart locks, wearable health monitors, capacitive touch user interfaces, and battery-powered industrial sensors. The combination of TrustZone, secure key storage, and tamper detection makes this MCU particularly suitable for products that must resist physical and firmware-level attacks while running for years on a single coin cell.
Designers should plan for an external 32.768 kHz crystal to enable accurate RTC timing in backup mode, and ensure the secure boot configuration bits are locked before deployment. The 5x5 mm VQFN package requires thermal relief vias under the exposed pad to meet the datasheet's thermal resistance specification.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that go beyond the manufacturer datasheet to help engineers select, source, and integrate the ATSAML11E16A-MFTKPH efficiently.
Drop-in alternatives for ATSAML11E16A-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 ATSAML11E16A-MFTKPH (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Core Architecture, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E16A-MF
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →ATSAML11E15A-MFT
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →ATSAML11D16A-MFTKPH
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →ATSAML10E16A-MF
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →ATSAML11E16A-MFTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (ARMv8-M Baseline) |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 64 KB |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Security | ARM TrustZone-M, secure key storage, tamper detection, crypto accelerator |
| Touch Peripheral | Enhanced PTC (Peripheral Touch Controller), up to 256 channels |
| ADC | 12-bit, up to 20 channels |
| Serial Peripherals | SERCOM (configurable as UART/SPI/I2C) |
| Package | 32-pin VQFN (5x5 mm) with exposed pad |
| Operating Temperature | -40C to +125C |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| TrustZone Support | Yes (ARMv8-M TrustZone-M) |
ATSAML11E16A-MFTKPH Pin Configuration
| Pin 1 | PA00 — GPIO / XIN (external crystal oscillator input) |
| Pin 2 | PA01 — GPIO / XOUT (external crystal oscillator output) |
| Pin 3 | PA02 — GPIO / ADC AIN0 |
| Pin 3 | PA03 — GPIO / ADC AIN1 / VREFA reference voltage input |
| Pin 5 | PA04 — GPIO / ADC AIN2 |
| Pin 6 | PA05 — GPIO / ADC AIN3 |
| Pin 7 | PA06 — GPIO / ADC AIN4 |
| Pin 8 | PA07 — GPIO / ADC AIN5 |
| Pin 9 | VDD — Core and I/O supply voltage (1.62V-3.63V) |
| Pin 10 | GND — Ground |
| Pin 11 | PB00 — GPIO |
| Pin 12 | PB01 — GPIO |
| Pin 13 | PB02 — GPIO |
| Pin 14 | PB03 — GPIO |
| Pin 15 | PB04 — GPIO |
| Pin 16 | PB05 — GPIO |
| Pin 17 | PB06 — GPIO |
| Pin 18 | PB07 — GPIO |
| Pin 19 | PC00 — GPIO |
| Pin 20 | PC01 — GPIO |
| Pin 21 | PC02 — GPIO |
| Pin 22 | PC03 — GPIO |
| Pin 23 | PC04 — GPIO |
| Pin 24 | PC05 — GPIO |
| Pin 25 | PC06 — GPIO |
| Pin 26 | PC07 — GPIO |
| Pin 27 | PA08 — GPIO |
| Pin 28 | PA09 — GPIO |
| Pin 29 | PA10 — GPIO |
| Pin 30 | PA11 — GPIO |
| Pin 31 | PA12 — GPIO / SWDIO (debug data) |
| Pin 32 | PA13 — GPIO / SWCLK (debug clock) |
| Pin 33 | EP — Exposed thermal pad - must be soldered to ground plane |
Typical Applications
ATSAML11E16A-MFTKPH is suitable for 7 applications: IoT Sensor Hubs with Secure Boot, Smart Locks and Tamper-Resistant Access Control, Wearable Health and Fitness Bands, Capacitive Touch User Interfaces, Battery-Powered Industrial Sensors, Secure Medical Consumables and Diagnostic Devices, Smart Home and Building Automation Controllers.
IoT Sensor Hubs with Secure Boot
The ATSAML11E16A-MFTKPH's ARM TrustZone-M, secure key storage, and crypto accelerator make it ideal for IoT sensor hubs that must authenticate firmware before reading sensor data. With <25 uA/MHz active and <100 nA sleep currents, it enables multi-year coin-cell operation in duty-cycled temperature, humidity, or motion sensor nodes. The 64KB Flash holds TLS or LoRaWAN stacks with room for a secure bootloader. Designers typically pair it with a sub-GHz radio such as SAM R34 or an SPI-attached sensor frontend, using the SERCOM peripherals to drive the radio bus while TrustZone isolates the cryptographic material.
Recommended
Smart Locks and Tamper-Resistant Access Control
Hardware TrustZone-M, secure key storage, and chip-level tamper detection on the ATSAML11E16A-MFTKPH directly target smart lock and access-control designs where physical and firmware attacks must be resisted. The 32-VQFN 5x5 mm package fits behind the lock's escutcheon, while <100 nA sleep current preserves battery life for years. The 12-bit ADC reads battery voltage and tamper switches, SERCOM peripherals drive motor or solenoid drivers, and the secure boot flow validates firmware at every power-on. Drop-in same-family variants (ATSAML11E16A-MF, ATSAML11E15A-MFT) let designers scale Flash size without PCB changes.
Recommended
Wearable Health and Fitness Bands
Wearable health bands benefit from the ATSAML11E16A-MFTKPH's combination of sub-100 nA sleep current, enhanced Peripheral Touch Controller for capacitive buttons, and a 12-bit ADC for heart-rate or SpO2 sensor front-ends. The Cortex-M23 core runs lightweight BLE or proprietary 2.4 GHz stacks within 64KB Flash. Secure boot and TrustZone protect user health data at rest, addressing HIPAA/GDPR concerns. The 5x5 mm VQFN package fits wristbands under 10 mm wide, while the -40C to +125C operating range tolerates skin-temperature extremes during exercise.
Recommended
Capacitive Touch User Interfaces
The ATSAML11E16A-MFTKPH's enhanced Peripheral Touch Controller supports up to 256 mutual-capacitance or self-capacitance channels, enabling waterproof touch buttons, sliders, and proximity wake-up from deep sleep. This suits appliance control panels, industrial HMI, and smart-home keypads where mechanical switches are unreliable. Designers use the PTC's hardware-driven scanning to wake the MCU only on user touch, holding sleep current below 100 nA. The Cortex-M23 then validates input via TrustZone before forwarding commands, ensuring UI firmware cannot bypass security checks.
Recommended
Battery-Powered Industrial Sensors
Industrial sensor nodes running from a single 3.6V lithium thionyl chloride cell benefit from the ATSAML11E16A-MFTKPH's <25 uA/MHz active current, 1.62-3.63V supply range, and -40C to +125C operating range. The MCU monitors 4-20 mA loop sensors or strain-gauge bridges via its 12-bit ADC, communicates over RS-485 via SERCOM, and stores calibration data in ECC-protected Flash. TrustZone isolates vendor-provisioned calibration certificates from application firmware, allowing secure field recalibration. Average current budget for a once-per-minute measurement node stays under 5 uA.
Recommended
Secure Medical Consumables and Diagnostic Devices
The ATSAML11E16A-MFTKPH's secure boot, key storage, and tamper detection make it well suited to medical consumables such as disposable diagnostic cartridges, where authentication of the cartridge prevents counterfeit reuse. Hardware TrustZone isolates the calibration curve from user firmware, ensuring only signed firmware can read sensitive data. The sub-100 nA sleep current and small VQFN footprint fit into credit-card-sized consumables. The Cortex-M23 runs motor control, fluidic timing, and BLE result reporting within 64KB Flash, leaving headroom for future feature expansion.
Recommended
Smart Home and Building Automation Controllers
Building automation hubs and smart-home edge controllers use the ATSAML11E16A-MFTKPH as a secure, low-power co-MCU alongside a Linux host processor. The Cortex-M23 handles local sensor polling, capacitive touch UI, and secure key management while the host focuses on cloud connectivity. SERCOM peripherals bridge to RS-485 or KNX bus transceivers, the 12-bit ADC reads light and occupancy sensors, and TrustZone isolates tenant credentials from shared firmware. The 32-VQFN package and 3.3V supply simplify integration with PoE-powered controllers.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E16A-MFTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E16A-MF | ATSAML11E15A-MFT | ATSAML11D16A-MFTKPH | ATSAML10E16A-MF |
|---|---|---|---|---|---|
| Package | 32-VQFN (5x5) | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same | 32-VQFN (5x5) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 64 KB | 64 KB | 32 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| TrustZone-M | Yes | Yes | Yes | Yes | No |
| Enhanced PTC | Yes (256 channels) | Yes (256 channels) | Yes (256 channels) | Yes | Yes (base PTC) |
| Operating Voltage | 1.62V - 3.63V | 1.62V - 3.63V | 1.62V - 3.63V | 1.62V - 3.63V | 1.62V - 3.63V |
Key Differentiators
- Industry's first and lowest-power Cortex-M23 with TrustZone-M (vs ATSAML10E16A-MF)
- 64KB Flash with full TrustZone support (vs ATSAML11E15A-MFT)
- Enhanced PTC supports up to 256 touch channels (vs ATSAML11D16A-MFTKPH)
Design Notes
Place a 1 uF X7R ceramic bypass capacitor within 3 mm of the VDD pin, with a 100 nF X7R in parallel to suppress high-frequency noise from the internal regulator switching. For battery applications, the 32.768 kHz crystal should be a low-ESR type rated for <1 uA start-up drive to preserve sub-100 nA sleep performance.
Estimated: at the maximum 32 MHz active current of 25 uA/MHz with 3.3V supply, total dissipation is approximately 2.6 mW - well below thermal limits. The 32-VQFN's exposed pad must be soldered to a continuous ground copper pour with thermal vias to achieve the datasheet's theta_JA. For harsh industrial environments, ensure the design stays below 70C ambient to leave margin for self-heating.
Route the SWDIO and SWCLK signals (PA12/PA13) away from noisy SERCOM traces and keep their trace length under 50 mm to maintain debug stability. For touch-sensitive designs using the enhanced PTC, surround each touch electrode with a ground hatch to improve noise immunity and water tolerance. The PTC's sampling capacitor must be placed within 5 mm of the analog supply pin.
Do not skip the Boot ROM configuration step when enabling TrustZone - secure Flash regions must be locked before deployment, or an attacker can re-program the secure bootloader. The NVMCTRL peripheral's lock bits must be set via the BOOTPROT fuses, not in software, to be tamper-resistant. Always validate the signed firmware image in a TrustZone-secure callable function before passing control to it.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive designs, consider the SAM L11 automotive-grade variants. Lead-free and halogen-free per Microchip material declarations.
