ATSAML11E14A-MUT - 32MHz Cortex-M23 MCU 16KB Flash 32-VQFN
MPN: ATSAML11E14A-MUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.85 | $28.50 |
| 100 | $2.55 | $255.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $1.95 | $1,950.00 |
ATSAML11E14A-MUT Overview
A microcontroller (MCU) is a compact integrated circuit that combines a CPU core, program memory, working RAM, and a rich set of peripherals on a single silicon die. The Cortex-M23 is an ARMv8-M Baseline architecture core that brings TrustZone for Cortex-M hardware isolation, deterministic interrupts, and Thumb-2 instruction efficiency to cost-sensitive embedded applications. Within the broader semiconductor taxonomy, microcontrollers sit below microprocessors and application processors; the SAM L11 belongs to the ultra-low-power security-enabled MCU class, between general-purpose MCUs and secure-element ICs.
Key features include hardware cryptographic accelerators (AES, SHA, True Random Number Generator), TrustZone isolation between secure and non-secure code regions, a 12-bit 1 MSPS ADC, multiple SERCOM serial interfaces that can be configured as UART/SPI/I2C, and a full-speed USB device port. The 16 KB Flash supports secure boot, and the part ships in Tape & Reel (T&R) packaging for high-volume SMT assembly. The Crypto variant suffix 'C' (denoted by the T at end of MUT) indicates this is the secure TrustZone part, distinguishing it from the non-secure baseline variants in the same pinout.
Typical applications include IoT end nodes that require secure firmware updates, sensor hubs with authenticated telemetry, smart-meter secure elements, medical wearables requiring HIPAA-style data isolation, and industrial keyless-entry or asset-tracking modules. The compact 32-VQFN footprint and 85C rating make it well-suited for space-constrained, security-conscious edge devices.
When designing with this MCU, allocate sufficient decoupling (100 nF + 1 uF minimum) close to VDD pins, and place a 32.768 kHz crystal across the XIN/XOUT pins if low-power RTC operation is required. TrustZone-aware firmware development is essential; consult the SAM L11 TrustZone application note from Microchip before porting legacy Cortex-M code.
Drop-in alternatives for ATSAML11E14A-MUT — 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 ATSAML11E14A-MUT (same form factor and footprint) — differing in Package, Core Architecture, Security Features, Operating Temperature, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E15A-MUT
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATSAML11E14A-AUT
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →ATSAML11E14A-AU
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →ATSAML10E15A-MUT
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →ATSAML10E16A-MUT
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATSAML11D14A-MUT
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ATSAML11E14A-MUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (ARMv8-M Baseline with TrustZone) |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 8 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Operating Temperature | -40C to +85C (industrial) |
| Package | 32-VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| Security Features | ARM TrustZone, secure key storage, tamper resistance, hardware AES/SHA/TRNG |
| Active Current | <25 uA/MHz |
| Sleep Current | <100 nA |
| ADC | 12-bit, up to 1 MSPS (per family datasheet) |
| Communication Interfaces | SERCOM (UART/SPI/I2C), USB Full-Speed Device (per family datasheet) |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (T&R) |
ATSAML11E14A-MUT Pin Configuration
| Pin 1 | PA00 — GPIO/ADC/SERCOM - multifunction I/O |
| Pin 2 | PA01 — GPIO/ADC/SERCOM - multifunction I/O |
| Pin 3 | PA02 — GPIO/AIN0/SERCOM - multifunction I/O |
| Pin 4 | PA03 — GPIO/AIN1/REF - ADC reference/positive |
| Pin 5 | PA04 — GPIO/AIN2/VOUT - ADC negative reference |
| Pin 6 | PA05 — GPIO/AIN3 |
| Pin 7 | PA06 — GPIO/AIN4 |
| Pin 8 | PA07 — GPIO/AIN5 |
| Pin 9 | VDD — Digital supply voltage |
| Pin 10 | VSS — Digital ground |
| Pin 11 | PA08 — GPIO/AIN6/XIN - 32.768 kHz crystal input |
| Pin 12 | PA09 — GPIO/AIN7/XOUT - 32.768 kHz crystal output |
| Pin 13 | PA10 — GPIO/SERCOM - multifunction I/O |
| Pin 14 | PA11 — GPIO/SERCOM - multifunction I/O |
| Pin 15 | PA14 — GPIO/SERCOM - multifunction I/O |
| Pin 16 | PA15 — GPIO/SERCOM - multifunction I/O |
| Pin 17 | PA16 — GPIO/SERCOM - multifunction I/O |
| Pin 18 | PA17 — GPIO/SERCOM - multifunction I/O |
| Pin 19 | PA18 — GPIO/SERCOM - multifunction I/O |
| Pin 20 | PA19 — GPIO/SERCOM - multifunction I/O |
| Pin 21 | PA20 — GPIO/SERCOM - multifunction I/O |
| Pin 22 | PA21 — GPIO/SERCOM - multifunction I/O |
| Pin 23 | PA22 — GPIO/SERCOM - multifunction I/O |
| Pin 24 | PA23 — GPIO/SERCOM - multifunction I/O |
| Pin 25 | PA24 — GPIO/USB_DM - USB Full-Speed data minus |
| Pin 26 | PA25 — GPIO/USB_DP - USB Full-Speed data plus |
| Pin 27 | PA27 — GPIO/SWDIO - Serial Wire Debug I/O |
| Pin 28 | RESETn — Reset input, active low |
| Pin 29 | PA28 — GPIO/SWCLK - Serial Wire Debug clock |
| Pin 30 | PA30 — GPIO/SERCOM - multifunction I/O |
| Pin 31 | PA31 — GPIO/SERCOM - multifunction I/O |
| Pin 32 | GND — Exposed pad thermal ground (must be soldered) |
Typical Applications
ATSAML11E14A-MUT is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Meter Secure Element, Medical Wearable Data Isolation, Industrial Keyless Entry and Access Control, Battery-Powered Asset Tracker, Authenticated Sensor Hubs.
Secure IoT Sensor Nodes
The ATSAML11E14A-MUT fits secure IoT sensor endpoints because it combines ARM TrustZone isolation with hardware AES/SHA/TRNG in a 32-VQFN (5x5) footprint. Active current under 25 uA/MHz and sleep current under 100 nA let a coin-cell-powered node operate for years while keeping authenticated telemetry keys in TrustZone-protected Flash. The 16 KB Flash hosts a TrustZone-aware secure boot plus a non-secure application region for sensor processing, and the 12-bit ADC plus multiple SERCOM interfaces support temperature, humidity, and acceleration sensor chains with I2C or SPI.
Recommended
Smart Meter Secure Element
Utility smart meters require authenticated firmware updates and tamper-resistant key storage, both delivered by the ATSAML11E14A-MUT's TrustZone and secure key storage. The MCU's 1.62 V to 3.63 V supply range interfaces directly with battery-backed metering rails, and the 85C industrial temperature rating survives meter enclosures. Its hardware cryptographic accelerators (AES-256 and SHA-256) accelerate DLMS/COSEM and signed-firmware workflows without taxing the Cortex-M23 core, while the small 32-VQFN package fits inside tamper-detection enclosures alongside metrology ASICs.
Recommended
Medical Wearable Data Isolation
Medical wearables such as continuous glucose monitors and pulse oximeters benefit from the ATSAML11E14A-MUT's TrustZone to separate PHI processing from Bluetooth LE stack code, satisfying HIPAA-style data isolation requirements. The 16 KB Flash is sufficient for a TrustZone-aware BLE firmware plus secure-boot image, and the 32 MHz Cortex-M23 core handles sensor sampling and crypto operations. The 32-VQFN (5x5 mm) package fits wristband and patch form factors, while the <100 nA sleep current preserves multi-day battery life between charges.
Recommended
Industrial Keyless Entry and Access Control
Access-control readers require tamper-resistant credential verification, which the ATSAML11E14A-MUT provides through its secure key storage and chip-level tamper resistance. The Cortex-M23 core at 32 MHz executes challenge-response protocols against the hardware AES accelerator with deterministic latency, and TrustZone keeps root keys isolated from non-secure application code. The 32-VQFN package plus 85C rating suits outdoor keypad housings, while USB Full-Speed enables secure configuration via USB CDC during installer commissioning.
Recommended
Battery-Powered Asset Tracker
Asset trackers deployed in cold-chain logistics, rental fleets, and tool-tracking use cases benefit from the ATSAML11E14A-MUT's sub-100 nA sleep current and TrustZone-protected firmware authenticity. The MCU wakes periodically to read GPS/GNSS or BLE beacons, authenticates the location payload via SHA-256, and returns to sleep, all within a 16 KB Flash budget. Its 1.62 V minimum supply supports single-cell Li-coin or LiSOCl2 primary batteries common in long-life trackers, and the 32-VQFN (5x5) footprint leaves room for an integrated antenna PCB.
Recommended
Authenticated Sensor Hubs
Industrial sensor hubs aggregate data from multiple analog and digital sensors and must prove data provenance. The ATSAML11E14A-MUT's 12-bit ADC plus SERCOM channels let it interface with 4-20 mA analog chains and I2C/SPI digital sensors, while TrustZone signs each aggregated payload with a hardware-protected key before forwarding to a gateway. The 32-VQFN package and 85C rating fit DIN-rail mounted hubs operating in factory environments, and the Cortex-M23's deterministic interrupts keep time-critical control loops bounded.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E14A-MUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E15A-MUT | ATSAML11E14A-AUT | ATSAML11E14A-AU | ATSAML10E15A-MUT | ATSAML10E16A-MUT | ATSAML11D14A-MUT |
|---|---|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-TQFP (7x7 mm) - larger outline | 32-TQFP (7x7 mm) - larger outline | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same | 32-VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 (TrustZone) | ARM Cortex-M23 (TrustZone) | ARM Cortex-M23 (TrustZone) | ARM Cortex-M23 (TrustZone) | ARM Cortex-M23 (no TrustZone) | ARM Cortex-M23 (no TrustZone) | ARM Cortex-M23 (TrustZone, lower tier) |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 16 KB | 32 KB | 16 KB | 16 KB | 32 KB | 64 KB | 16 KB (lower tier) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 4-8 KB |
| Supply 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 | 1.62 V to 3.63 V |
| TrustZone Security | Yes (full TrustZone + crypto) | Yes (full TrustZone + crypto) | Yes (full TrustZone + crypto) | Yes (full TrustZone + crypto) | No (SAM L10 family, non-secure) | No (SAM L10 family, non-secure) | Yes (lower-tier TrustZone) |
| Approximate Unit Price (qty 1) | $3.10 | $3.40 | $3.15 | $3.05 | $2.70 | $2.95 | $2.85 |
Key Differentiators
- Industry's lowest-power Cortex-M23 with TrustZone (vs ATSAML10E15A-MUT)
- 32 KB Flash upgrade path without PCB change (vs ATSAML11E15A-MUT)
- 32-VQFN for compact, thermally efficient designs (vs ATSAML11E14A-AUT)
Design Notes
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of every VDD pin, and add a bulk 1 uF to 4.7 uF ceramic close to the IC for transient load support. The SAM L11 has separate VDDANA (analog) and VDDIO (digital) rails on related packages; on 32-VQFN both are tied, but still split the decoupling network between analog and digital sections to avoid ADC reference noise. Avoid ferrite beads on the analog rail - they inject noise into the ADC reference path.
Route SWDIO/SWCLK away from SERCOM signal traces and keep them shorter than 50 mm to avoid debugger signal-integrity issues. Solder the exposed thermal pad (pin 32 on VQFN-32) to a continuous ground copper pour with at least 4 thermal vias to the inner ground plane. This both grounds the reference and dissipates up to ~150 mW typical active power at 32 MHz without raising the junction temperature.
Estimated: total active current at 32 MHz and full GPIO toggling is roughly 32 MHz x 25 uA/MHz = 800 uA plus peripheral contribution. For TrustZone development, do not assume linker section names from Cortex-M0/M4 projects - SAM L11 requires explicit 'secure' and 'non-secure' linker regions in MPLAB XC32. Also verify the NVMCTRL region lock bits before mass production; an unlocked boot region allows flash read-out through SWD and defeats the secure-boot chain.
USB Full-Speed requires a 90 ohm differential impedance on the DP/DM pair (PA24/PA25). Match the trace lengths to within 0.5 mm and keep the pair over a continuous ground reference with no splits. Place the ESD protection diode within 5 mm of the USB connector. If USB is unused, leave DP and DM as NC; do not route them through noisy switching regions, as the internal pull-up can false-trigger if noise exceeds the input threshold.
Compliance Information
RoHS and lead-free status from Microchip product page. AEC-Q100 qualification not stated for this part; SAM L11 family targets industrial and consumer, not automotive grade.
