ATSAML11E15A-AFTKPH - 32KB Cortex-M23 MCU with TrustZone | Microchip
MPN: ATSAML11E15A-AFTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.21 | $221.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.72 | $1,720.00 |
ATSAML11E15A-AFTKPH Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and peripherals. The Cortex-M23 is ARM's smallest and most energy-efficient application processor, implementing the ARMv8-M baseline architecture with TrustZone for hardware-isolated secure and non-secure code execution. The SAM L11 family extends this with chip-level tamper resistance, secure key storage, and an enhanced Peripheral Touch Controller (PTC) for capacitive sensing.
Key features include 32 KB Flash, 8 KB SRAM, 1.62 V to 3.63 V operating voltage, ARM TrustZone, hardware AES/SHA crypto accelerator, true random number generator (TRNG), secure boot, and an enhanced PTC for touch applications. The 32-pin TQFP package offers ease of hand prototyping and breadboard compatibility for low-volume industrial designs.
Architecturally, the ATSAML11E15A integrates an ARM Cortex-M23 core with Microchip's proprietary picoPower technology, a flexible event system, and Microchip's TrustZone-managed secure bootloader. Hardware crypto acceleration offloads AES-128/256 and SHA-256 from software, reducing CPU load and enabling real-time encrypted communication without sacrificing power budget.
Typical applications include IoT secure sensor nodes, smart metering, wearable health monitors, secure door locks, and industrial HMI with touch buttons. Its low sleep current also makes it well suited to battery-powered devices such as wireless remote controls and asset trackers.
When designing with this device, note that the -AFTKPH variant ships with pre-provisioned root keys and certificates, eliminating the need for in-line provisioning during manufacturing. Plan for 4 KB of Flash to be reserved for the secure bootloader and TrustZone secure services.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for evaluation and sourcing decisions.
Drop-in alternatives for ATSAML11E15A-AFTKPH — 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 ATSAML11E15A-AFTKPH (same form factor and footprint) — differing in Core Architecture, Package, ADC, Active Current, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E15A-AFT
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATSAML11E14A-AFTKPH
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11E14A-AUTKPH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATSAML11E15A-AUTKPH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATSAML11E15A-AFTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 with TrustZone |
| Core Architecture | ARMv8-M Baseline |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 32 KB |
| RAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current | < 25 uA/MHz |
| Sleep Current | < 100 nA |
| Operating Temperature Range | -40 C to +125 C |
| Package | 32-pin TQFP |
| Cryptography | Hardware AES, SHA, TRNG |
| TrustZone | Yes (ARM TrustZone-M) |
| Touch | Enhanced Peripheral Touch Controller (PTC) |
| Key Provisioning | Yes (pre-provisioned -KPH variant) |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
ATSAML11E15A-AFTKPH Pin Configuration
| Pin 1 | PA00 — GPIO / peripheral function |
| Pin 2 | PA01 — GPIO / peripheral function |
| Pin 3 | PA02 — GPIO / peripheral function |
| Pin 4 | PA03 — GPIO / peripheral function |
| Pin 5 | PA04 — GPIO / peripheral function |
| Pin 6 | PA05 — GPIO / peripheral function |
| Pin 7 | PA06 — GPIO / peripheral function |
| Pin 8 | PA07 — GPIO / peripheral function |
| Pin 9 | VDDIO — Digital I/O supply |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO / peripheral function |
| Pin 12 | PA09 — GPIO / peripheral function |
| Pin 13 | PA10 — GPIO / peripheral function |
| Pin 14 | PA11 — GPIO / peripheral function |
| Pin 15 | VDDCORE — Core voltage regulator output (decouple) |
| Pin 16 | GND — Ground |
| Pin 17 | PA14 — GPIO / peripheral function |
| Pin 18 | PA15 — GPIO / peripheral function |
| Pin 19 | PA16 — GPIO / peripheral function |
| Pin 20 | PA17 — GPIO / peripheral function |
| Pin 21 | PA18 — GPIO / peripheral function |
| Pin 22 | PA19 — GPIO / peripheral function |
| Pin 23 | PA20 — GPIO / peripheral function |
| Pin 24 | PA21 — GPIO / peripheral function |
| Pin 25 | PA22 — GPIO / peripheral function |
| Pin 26 | PA23 — GPIO / peripheral function |
| Pin 27 | PA24 — GPIO / peripheral function |
| Pin 28 | PA25 — GPIO / peripheral function |
| Pin 29 | PA27 — GPIO / peripheral function |
| Pin 30 | VDDIO — Digital I/O supply |
| Pin 31 | RESET — Reset input (active low) |
| Pin 32 | VDDANA — Analog supply (decouple) |
Typical Applications
ATSAML11E15A-AFTKPH is suitable for 6 applications: Industrial IoT Secure Sensor Node, Smart Metering and Utility Endpoints, Wearable Health and Fitness Devices, Secure Door Locks and Access Control, Capacitive Touch HMI Panels, Battery-Powered Asset Trackers.
Industrial IoT Secure Sensor Node
The ATSAML11E15A-AFTKPH fits industrial IoT sensor nodes with its less than 25 uA/MHz active current and sub-100 nA sleep current, enabling multi-year battery life on a single coin cell. TrustZone isolation protects sensor calibration and OTA update keys from non-secure application code. The 32 KB Flash accommodates TinyML inference models for edge anomaly detection, while hardware AES offloads encrypted MQTT/TLS payloads without burdening the Cortex-M23 core. The 125 C temperature rating and on-chip TRNG make it suitable for outdoor industrial deployments.
Recommended
Smart Metering and Utility Endpoints
The ATSAML11E15A-AFTKPH is well-suited for smart metering endpoints where secure boot, hardware crypto, and ultra-low sleep current are critical. Its Cortex-M23 with TrustZone isolates metering firmware from network-stack code, preventing remote code execution from tampering with billing data. Hardware AES-128 and SHA-256 accelerate DLMS/COSEM or wireless M-Bus encrypted frames at low CPU cost. The 1.62 V to 3.63 V range allows direct connection to lithium-thionyl chloride primary cells common in utility metering.
Recommended
Wearable Health and Fitness Devices
The ATSAML11E15A-AFTKPH suits wearable health monitors thanks to its 100 nA sleep current, which preserves battery life between heart-rate or SpO2 sampling events. The enhanced Peripheral Touch Controller supports capacitive touch buttons for waterproof wearable user interfaces. TrustZone secures HIPAA-sensitive health data at rest and during BLE transfer to a paired phone. The compact 32-pin TQFP also enables slim form-factor wristband designs.
Recommended
Secure Door Locks and Access Control
The ATSAML11E15A-AFTKPH enables secure electronic locks with hardware AES key storage, TRNG-based nonce generation, and secure boot that blocks firmware tampering. Its ARM TrustZone isolates credential storage from the main lock firmware, blocking common side-channel attacks on PIN verification code. The 125 C rating supports outdoor lock installations in direct sun. Key-provisioned -KPH variants simplify lock manufacturer onboarding by injecting per-device keys at Microchip's secure facility.
Recommended
Capacitive Touch HMI Panels
The ATSAML11E15A-AFTKPH drives capacitive touch HMIs with its enhanced Peripheral Touch Controller that supports up to 32 buttons or a slider without external touch ICs. The Cortex-M23 core processes touch events in microseconds, allowing water-tolerant and glove-friendly touch algorithms. TrustZone secures HMI configuration parameters from field tampering in industrial control panels. Hardware crypto accelerates secure firmware update validation over the HMI USB interface.
Recommended
Battery-Powered Asset Trackers
The ATSAML11E15A-AFTKPH powers battery-operated asset trackers where sleep-mode power dominates the energy budget. With sleep current below 100 nA, the MCU can spend most of its life in retention while periodically waking to transmit GPS-fix or BLE beacons. Hardware AES authenticates the tracker to the fleet management cloud without CPU overhead, and TrustZone protects the device's secret attestation keys. The 32 KB Flash holds LoRaWAN or BLE stack plus application logic for years of unattended field deployment.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E15A-AFTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E15A-AFT | ATSAML11E14A-AFTKPH | ATSAML11E14A-AUTKPH | ATSAML11E15A-AUTKPH |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-pin TQFP | 32-pin TQFP - same | 32-pin TQFP - same | 32-pin TQFP - same | 32-pin TQFP - same |
| Flash Memory | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Core | Cortex-M23 + TrustZone | Cortex-M23 + TrustZone | Cortex-M23 + TrustZone | Cortex-M23 + TrustZone | Cortex-M23 + TrustZone |
| Max Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Hardware Crypto | AES + SHA + TRNG | AES + SHA + TRNG | AES + SHA + TRNG | AES + SHA + TRNG | AES + SHA + TRNG |
| Key Provisioning | Factory-provisioned (-KPH) | Not provisioned | Factory-provisioned (-KPH) | Factory-provisioned (-KPH) | Factory-provisioned (-KPH) |
| Packaging Form | Tape & Reel | Tape & Reel | Tape & Reel | Tray | Tray |
Key Differentiators
- Factory-provisioned secure keys eliminate in-line provisioning (vs ATSAML11E15A-AFT)
- Double the Flash of the E14 variant (vs ATSAML11E14A-AFTKPH)
- ARM Cortex-M23 + TrustZone at sub-100 nA sleep (vs ATSAML10E16A-MUT)
Design Notes
Estimated: with 1.8 V VDD, the SAM L11 draws approximately 25 uA/MHz in active mode and <100 nA in standby retention. For battery budgeting on a 250 mAh CR2032, this allows roughly 11 years of duty-cycled operation at 0.1% active duty. Add a 1 uF X7R decoupling capacitor within 3 mm of each VDD pin and a 4.7 uF bulk capacitor near the analog supply to suppress load transients.
Route the SWD signals (SWDIO, SWCLK, RESET) as short, parallel traces with a ground guard to avoid debug interface glitches. The 32-pin TQFP has no dedicated ground pad; place a star ground topology with multiple vias stitching the top and bottom ground planes around the package. Keep the 32 kHz crystal traces short and symmetric, and place the load capacitors within 2 mm of the XIN/XOUT pins to minimize jitter.
The -KPH variant ships with a per-device ECC key pair and X.509 certificate stored in secure Flash. According to the Microchip SAM L11 datasheet, secure boot will refuse to run any application not signed by the matching root key. Design the manufacturing flow so the factory-provisioned certificate is enrolled into your cloud PKI before the device reaches the field; otherwise secure boot will lock the device permanently.
Estimated: do not exceed 3.63 V on VDDIO or VDDANA - the on-chip voltage regulator will not survive over-voltage. TrustZone-M uses the non-secure alias (NS) for normal code, so make sure linker scripts place all application code in the 0x00000000-0x1FFFFFFF non-secure region, not the secure region reserved for the secure bootloader. Failing to reserve 4 KB of Flash for the secure bootloader will prevent OTA updates from being installed.
Compliance Information
RoHS compliant per Microchip product page. Standard -AFTKPH is not AEC-Q100 qualified; consult Microchip's automotive-grade SAM L11 ordering codes for AEC-Q100 options. The -KPH suffix indicates per-device factory key provisioning, which does not affect material compliance.
