ATSAML11D14A-MUT - 32MHz Cortex-M23 TrustZone MCU 16KB Flash | Microchip
MPN: ATSAML11D14A-MUT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
| 3,000 | $1.62 | $4,860.00 |
ATSAML11D14A-MUT Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, non-volatile program memory (Flash), volatile working memory (SRAM), and a rich set of peripherals including timers, communication controllers, and analog blocks. Within the broader semiconductor taxonomy, an MCU belongs to the embedded processor hierarchy: microcontroller -> embedded processor -> semiconductor IC. The SAM L11 family sits at the low-power, security-focused end of Microchip's SAM portfolio, designed for IoT edge nodes, secure sensors, and battery-operated products that require isolated secure and non-secure code execution domains via TrustZone for ARMv8-M.
Key features of the ATSAML11D14A include a single-cycle hardware multiplier, hardware divider, Nested Vector Interrupt Controller (NVIC), and a Memory Protection Unit (MPU). Secure key storage, chip-level tamper resistance, and a cryptographic accelerator make it well-suited for PSA Level 1 / Level 2 certified designs. Peripherals include SERCOM (configurable serial communication), ADC, DAC, and timers. The device operates over the industrial -40 Β°C to +85 Β°C temperature range, suiting consumer, industrial, and metering environments.
Architecturally, the SAM L11 implements the ARMv8-M Baseline profile with TrustZone, providing hardware isolation between secure and non-secure code. The Cortex-M23 core pairs a 2-stage pipeline with deterministic interrupt handling. A low-power Always-On (AON) domain keeps RTC and wake sources alive below 100 nA, while dynamic power scaling adjusts active current to workload. Integrated op amps and a 12-bit 1 Msps ADC ease analog front-end designs.
Typical applications include secure IoT end nodes, smart meters, wireless sensor nodes (BLE/Zigbee host MCUs), medical wearables, secure access control, and industrial HMI. Designers also deploy it in home automation and battery-powered consumer products where 100 nA sleep current extends multi-year coin-cell life.
When designing with this part, ensure that the secure/non-secure memory partitioning and linker configuration align with the TrustZone model β firmware written without the secure attribution scheme loses the device's primary security benefit. Use Microchip MPLAB X IDE with MCC for TrustZone-aware project generation, and verify sleep-mode current on the bench because leakage can dominate at room-temperature corners.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM L11 family and qualified cross-brand equivalents, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAML11D14A-MUT 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 ATSAML11D14A-MUT (same form factor and footprint) β differing in Package, Operating Temperature, ADC, Core, Sleep Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAML11D15A-MUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11E16A-MUT
β Drop-Inβ In Stock
$2.07 / Unit
View Datasheet βATSAML11D14A-MU
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D14A-YFT
β Drop-Inβ In Stock
$1.97 / Unit
View Datasheet βATSAML10D16A-MFT
β Drop-Inβ In Stock
$1.7 / Unit
View Datasheet βATSAMD11D14A-MUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML11D14A-MUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (ARMv8-M Baseline with TrustZone) |
| Maximum Clock Speed | 32 MHz |
| Core Performance | 2.62 CoreMark/MHz, up to 31 DMIPS |
| Program Flash | 16 KB (16K x 8) |
| SRAM | 8 KB |
| Data Flash | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current | < 25 Β΅A/MHz |
| Sleep Current | < 100 nA |
| Hardware Multiplier | Single-cycle 32-bit |
| Hardware Divider | Yes |
| NVIC | Yes |
| Memory Protection Unit (MPU) | Yes |
| TrustZone for ARMv8-M | Yes |
| Operating Temperature | -40 Β°C to +85 Β°C |
| Package | 24-VQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Bit Width | 32-bit |
ATSAML11D14A-MUT Pin Configuration
| Pin 1 | PA00 β GPIO / XIN (external clock input) |
| Pin 2 | PA01 β GPIO / XOUT (external clock output) |
| Pin 3 | GND β Ground |
| Pin 4 | VDDIO β Digital I/O supply voltage |
| Pin 5 | VDDANA β Analog supply voltage |
| Pin 6 | GND β Ground |
| Pin 7 | PA02 β GPIO / ADC input |
| Pin 8 | PA03 β GPIO / ADC reference |
| Pin 9 | PA04 β GPIO / SERCOM |
| Pin 10 | PA05 β GPIO / SERCOM |
| Pin 11 | PA06 β GPIO / SERCOM |
| Pin 12 | PA07 β GPIO / SERCOM |
| Pin 13 | PA08 β GPIO / SERCOM / I2C |
| Pin 14 | PA09 β GPIO / SERCOM / I2C |
| Pin 15 | PA10 β GPIO / SERCOM / TCC |
| Pin 16 | PA11 β GPIO / SERCOM / TCC |
| Pin 17 | PA14 β GPIO / SWD clock (programming/debug) |
| Pin 18 | PA15 β GPIO / SWD data (programming/debug) |
| Pin 19 | RESET β Active-low reset input |
| Pin 20 | PA27 β GPIO / external interrupt |
| Pin 21 | PA28 β GPIO / external interrupt |
| Pin 22 | PA30 β GPIO / SERCOM |
| Pin 23 | PA31 β GPIO / SERCOM |
| Pin 24 | GND_EPAD β Exposed pad / thermal pad (must be soldered to GND) |
Typical Applications
ATSAML11D14A-MUT is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Electricity Meters, Battery-Powered Medical Wearables, Home Automation Controllers, Industrial HMI Keypad Panels, Secure Access Control Readers.
Secure IoT Sensor Nodes
The ATSAML11D14A-MUT's TrustZone for ARMv8-M, secure boot, and PSA Level 1 certifiable security make it a natural host MCU for IoT sensor nodes that authenticate to cloud services. The <25 Β΅A/MHz active and <100 nA sleep currents allow coin-cell-powered nodes to run for years; the Cortex-M23 at 32 MHz runs TLS handshakes and RSA/ECC verification through the integrated cryptographic accelerator. Paired with an external ATECC608B secure element, the design achieves hardware root-of-trust and tamper-resistant key storage suitable for AWS IoT, Azure Sphere, and Matter commissioning flows.
Recommended
Smart Electricity Meters
The ATSAML11D14A-MUT is well-suited for residential and commercial smart meters because its Cortex-M23 + TrustZone isolates the metering firmware from the communication stack, preventing remote tampering with billing data. The 12-bit 1 Msps ADC handles simultaneous voltage and current sampling for class-0.5 metering accuracy, and the low-power Always-On domain keeps RTC and tamper detection alive below 100 nA during sleep. The 1.62β3.63V supply accepts direct Li-ion or 3.6V Li-SOCl2 battery operation; pair with ADE9153A for shunt-based current sensing.
Recommended
Battery-Powered Medical Wearables
For continuous-monitoring medical wearables (glucose patches, pulse oximeters, wearable ECG), the ATSAML11D14A-MUT's 100 nA sleep current is critical to achieving 7β14 day battery life on small Li-Po cells. The Cortex-M23 at 32 MHz computes FFT-based heart-rate-variability and SpO2 algorithms with sufficient headroom for future firmware updates; TrustZone isolates patient health data (PHI) from the BLE stack to satisfy HIPAA-style data handling expectations. The integrated 12-bit ADC reads pulse-ox sensor photodiode outputs directly, eliminating an external ADC.
Recommended
Home Automation Controllers
The ATSAML11D14A-MUT runs Matter, Zigbee, or Z-Wave host stacks for smart-home hubs and Matter Thread Border Routers with TrustZone isolating commissioning credentials. Its Cortex-M23 at 32 MHz handles network commissioning flows, OTA firmware verification, and rule-based scene logic while keeping the radio interface responsive. The 24-VQFN (4x4 mm) footprint fits into compact wall-switch and outlet form factors; the 2KB Data Flash stores commissioning tokens and device pairing data with hardware write protection.
Recommended
Industrial HMI Keypad Panels
The ATSAML11D14A-MUT drives small industrial HMI keypad and rotary-encoder panels, where TrustZone isolates the configuration UI from the safety-critical control code. The Cortex-M23 + DMA handles capacitive touch scanning through the PTC peripheral, while the SERCOM ports drive OLED displays or character LCDs via SPI. The -40 Β°C to +85 Β°C industrial operating range suits factory-floor enclosures, and the 24-VQFN's small footprint enables behind-display placement on compact panels.
Recommended
Secure Access Control Readers
The ATSAML11D14A-MUT powers RFID/NFC door readers where TrustZone protects the cryptographic master keys and prevents firmware extraction from a stolen reader. Its Cortex-M23 + crypto accelerator verifies MIFARE DESFire, EV1, and EV2 credentials in <80 ms β fast enough for tap-and-go door access. The 100 nA sleep current supports battery-backed readers that survive AC mains outages; pair with PN512 NFC frontend for ISO 14443 A/B communication up to 10 cm read range.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D14A-MUT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-MUT | ATSAML11E16A-MUT | ATSAML11D14A-MU | ATSAML11D14A-YFT | ATSAML10D16A-MFT |
|---|---|---|---|---|---|---|
| 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 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 16 KB | 32 KB | 64 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 16 KB | 8 KB | 8 KB | 8 KB |
| TrustZone | Yes (ARMv8-M) | Yes (ARMv8-M) | Yes (ARMv8-M) | Yes (ARMv8-M) | Yes (ARMv8-M) | No (Cortex-M23 without TrustZone) |
| Core | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| 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 | 1.62 V to 3.63 V |
| Operating Temperature | -40 Β°C to +85 Β°C | -40 Β°C to +85 Β°C | -40 Β°C to +85 Β°C | -40 Β°C to +85 Β°C | -40 Β°C to +105 Β°C (extended) | -40 Β°C to +85 Β°C |
Key Differentiators
- Industry's first Cortex-M23 MCU with TrustZone for ARMv8-M (vs ATSAML10D16A-MFT)
- Pin-compatible with 32KB and 64KB Flash siblings (vs ATSAML11D15A-MUT)
- 100 nA sleep vs 1 Β΅A+ typical Cortex-M0+ competitors (vs ATSAMD11D14A-MUT)
Design Notes
Estimated: at VDD=3.3V, clock=32 MHz, all peripherals on, the ATSAML11D14A-MUT draws approximately 0.8 mA active (<25 Β΅A/MHz * 32 MHz). In Standby sleep with RTC running, current drops below 100 nA, enabling multi-year coin-cell operation. Use the SUPC controller to switch to the 32.768 kHz crystal oscillator for RTC and wake sources during sleep to avoid waking the DFLL main clock. Place a 1 Β΅F X7R decoupling capacitor within 3 mm of VDDANA and another on VDDIO; add a 100 nF for high-frequency noise suppression.
Estimated: at typical IoT duty cycles (1% active, 99% sleep), the average power dissipation is below 100 Β΅W and junction temperature rise is negligible. The 24-VQFN's exposed pad (pin 24) must be soldered to a copper pour of at least 25 mmΒ² to meet the thermal resistance spec of 39 Β°C/W (4-layer JEDEC EIA/JESD51 test board). In continuous active mode at 32 MHz the device consumes ~2.7 mW β still well within thermal limits. Verify sleep-mode current on the bench because PCB leakage paths on I/O pins can easily exceed 100 nA and dominate the device's own quiescent draw.
Estimated: Firmware written without TrustZone-aware memory partitioning loses the device's primary security benefit. Configure linker scripts to split Flash and SRAM into secure (S) and non-secure (NS) regions per ARMv8-M, and use the SAU (Security Attribution Unit) to enforce isolation. Do not leave the SWD pins (PA14/PA15) exposed in production β disable SWD via NVM bits and use secure boot to prevent firmware extraction. Use Microchip MPLAB X IDE with the MCC TrustZone configurator to generate correct startup files; manual edits to startup_saml11.c often break the secure/non-secure attribution model.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free reflow compatible; industrial -40Β°C to +85Β°C operating range. Not AEC-Q100 qualified β use ATSAML11D14A-E (automotive grade) variants for AEC-Q100 applications. PSA Certified Level 1 ready; refer to Microchip's PSA Level 2 certification reports for tamper-resistance claims.
