ATSAML11D15A-MU - 32KB Flash Cortex-M23 MCU | Microchip
MPN: ATSAML11D15A-MU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.97 | $2.97 |
| 10 | $2.78 | $27.80 |
| 100 | $2.42 | $242.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.95 | $1,950.00 |
ATSAML11D15A-MU Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash/SRAM), and programmable peripherals. Within the broader taxonomy, MCUs belong to microprocessors, which sit under integrated circuits and ultimately semiconductors. The Cortex-M23 core is an Armv8-M baseline implementation, positioned below Cortex-M3/M4 in performance but above Cortex-M0+ in features, with optional TrustZone-M security extensions for hardware-isolated trusted code execution.
Key features include ARM TrustZone for Cortex-M technology enabling hardware-level secure/non-secure code isolation, secure key storage, chip-level tamper resistance, a True Random Number Generator (TRNG), and secure boot. Peripherals include SERCOM (configurable serial communication), ADC, timers, and event system. The device supports 1.6V to 3.6V supply voltage, making it suitable for battery-powered designs using lithium coin cells or 2xAA alkaline.
Typical applications include IoT end nodes, smart sensors, secure authentication tokens, medical wearables, industrial wireless sensor nodes, and consumer devices requiring secure firmware update and anti-counterfeiting. The combination of TrustZone, tamper detection, and secure boot makes it Microchip's lowest-power MCU with hardware-rooted security.
When designing with this device, ensure that the secure boot configuration is provisioned during production programming, as the TrustZone attribution table cannot be modified after lock. For ultra-low-power designs, leverage the SleepWalking feature to allow peripherals to wake the CPU only on relevant events, reducing average current draw to single-digit microamps in typical IoT duty cycles.
This page synthesizes distributor pricing, verified drop-in alternatives from the SAM L11 family, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAML11D15A-MU — 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-MU (same form factor and footprint) — differing in Package, Operating Temperature, Active Current, ADC, Sleep Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MUT
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ATSAML11D16A-MU
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
ATSAML11E15A-MU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.55 / Unit
View Datasheet →ATSAML10E15A-MUT
✅ Drop-In✓ In Stock
$2.74 / Unit
View Datasheet →ATSAML10D15A-MU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D15A-MU Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 |
| Bit Width | 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 32 KB |
| SRAM | 8 KB |
| Package | 24-pin VQFN (4x4 mm) with exposed pad |
| Supply Voltage | 1.62 V to 3.63 V |
| Operating Temperature | -40C to +85C |
| Security | ARM TrustZone-M, secure boot, TRNG, secure key storage, tamper resistance |
| Active Current | <25 uA/MHz |
| Sleep Current | <100 nA |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Tube Packaging | Yes (per Mouser listing) |
ATSAML11D15A-MU Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM / ADC |
| Pin 2 | PA01 — GPIO / SERCOM / ADC |
| Pin 3 | PA02 — GPIO / SERCOM / ADC |
| Pin 4 | PA03 — GPIO / SERCOM / ADC |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Supply voltage (1.62V to 3.63V) |
| Pin 7 | PA04 — GPIO / SERCOM |
| Pin 8 | PA05 — GPIO / SERCOM |
| Pin 9 | PA06 — GPIO / SERCOM |
| Pin 10 | PA07 — GPIO / SERCOM |
| Pin 11 | PA08 — GPIO / SERCOM / ADC |
| Pin 12 | PA09 — GPIO / SERCOM / ADC |
| Pin 13 | PA10 — GPIO / SERCOM / ADC |
| Pin 14 | PA11 — GPIO / SERCOM / ADC |
| Pin 15 | PA14 — GPIO / SERCOM |
| Pin 16 | PA15 — GPIO / SERCOM |
| Pin 17 | PA16 — GPIO / SERCOM / ADC |
| Pin 18 | PA17 — GPIO / SERCOM / ADC |
| Pin 19 | PA18 — GPIO / SERCOM |
| Pin 20 | PA19 — GPIO / SERCOM |
| Pin 21 | RESET — Reset input (active low) |
| Pin 22 | SWDIO — Serial Wire Debug I/O |
| Pin 23 | SWCLK — Serial Wire Debug Clock |
| Pin 24 | EP — Exposed thermal pad - connect to GND |
Typical Applications
ATSAML11D15A-MU is suitable for 6 applications: Secure IoT End Nodes, Smart Sensor Hubs, Medical Wearable Devices, Secure Authentication Tokens, Industrial Wireless Sensor Nodes, Smart Home Connected Devices.
Secure IoT End Nodes
The ATSAML11D15A-MU is purpose-built for secure IoT end nodes requiring hardware-rooted trust and ultra-low power consumption. Its ARM TrustZone-M enables isolation between trusted firmware (secure bootloader, key storage) and non-trusted application code, preventing firmware extraction attacks. At less than 25 uA/MHz active and under 100 nA in deep sleep, it allows coin-cell battery lifetimes exceeding 5 years in typical duty-cycled sensor applications. The Cortex-M23 core running at 32 MHz provides adequate processing for LoRaWAN, Bluetooth LE, or sub-GHz radio stack handling, while the 32KB Flash accommodates full IoT protocol stacks with overhead for OTA update staging.
Recommended
Smart Sensor Hubs
The ATSAML11D15A-MU excels as a smart sensor hub aggregating multiple analog and digital sensors with on-device security. Its Cortex-M23 core efficiently handles sensor fusion algorithms while TrustZone protects calibration data and factory provisioning keys. The 8KB SRAM supports buffering of multi-axis IMU and environmental sensor data before transmission. Operating from 1.62V to 3.63V allows direct connection to battery sources without boost converters. Peripherals like SERCOM, ADC, and event system enable direct interfacing with I2C/SPI sensors and analog transducers, reducing external component count.
Recommended
Medical Wearable Devices
The ATSAML11D15A-MU suits medical wearables where patient data security and battery longevity are regulatory requirements. ARM TrustZone provides hardware isolation for protected health information (PHI), addressing HIPAA-style compliance needs, while secure boot prevents unauthorized firmware replacement. The sub-100 nA sleep current enables continuous wearable monitoring with multi-day battery life. With 32KB Flash, the device fits compact firmware for heart rate, SpO2, or temperature monitoring algorithms. The 24-pin VQFN (4x4 mm) package fits space-constrained wearable form factors.
Recommended
Secure Authentication Tokens
The ATSAML11D15A-MU is ideal for hardware authentication tokens and secure accessory identification. Its TRNG and secure key storage support cryptographic operations like ECDSA, ECDH, and AES for challenge-response authentication protocols. The TrustZone isolation prevents key extraction even if application code is compromised, addressing anti-counterfeiting and accessory authentication use cases. With USB, I2C, or SPI host interfaces via SERCOM, the device integrates easily into authentication dongles, secure peripherals, or consumable authentication modules for medical/industrial devices.
Recommended
Industrial Wireless Sensor Nodes
The ATSAML11D15A-MU powers industrial wireless sensor nodes requiring long-term reliability and secure data transmission. TrustZone secures Modbus/IO-Link/WirelessHART protocol stacks, while tamper detection flags physical enclosure breaches. The wide 1.62V to 3.63V supply range supports 3.6V lithium thionyl chloride batteries used in industrial metering. The Cortex-M23 core handles industrial protocols at 32 MHz, and the 24-pin VQFN package's exposed pad provides thermal performance for -40C to +85C industrial temperature range operation per Microchip datasheet.
Recommended
Smart Home Connected Devices
The ATSAML11D15A-MU targets smart home devices where secure commissioning and OTA updates are essential. TrustZone protects Wi-Fi/BLE pairing credentials and prevents unauthorized firmware rollback. The ultra-low sleep current (under 100 nA) enables battery-powered smart home sensors like door/window contacts running for years on a single coin cell. The Cortex-M23 core and 32KB Flash accommodate Matter, Thread, or Zigbee stack components for connected lighting, locks, and environmental sensors, while the 24-pin VQFN package enables compact consumer form factors.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D15A-MU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-MUT | ATSAML11D14A-MUT | ATSAML11D16A-MU | ATSAML10E15A-MU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 24-pin VQFN (4x4 mm) | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same | 24-pin VQFN (4x4 mm) - same |
| Core | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 | Cortex-M23 |
| Flash | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| TrustZone Security | Yes | Yes | Yes | Yes | No |
| Max Clock | 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 |
| Packaging | Tube | Tape and Reel | Tape and Reel | Tube | Tube |
Key Differentiators
- ARM TrustZone-M hardware security with chip-level tamper resistance (vs ATSAML10E15A-MU)
- Industry's lowest-power Cortex-M23 with security (vs ATSAML11D14A-MUT)
- Drop-in compatible with 64KB Flash upgrade variant (vs ATSAML11D16A-MU)
Design Notes
Estimated: At 3.3V supply and 32 MHz active operation, the ATSAML11D15A-MU draws approximately 25 uA/MHz x 32 MHz = 800 uA per the Microchip product page. In deep sleep, current drops below 100 nA, enabling battery designs with average consumption in single-digit uA range. Place a 1 uF and 100 nF decoupling capacitor pair as close as possible to VDD pin (pin 6) and exposed pad (pin 24).
The 24-pin VQFN package has an exposed thermal pad (pin 24) that must be soldered to a ground plane for proper thermal dissipation and electrical performance. Use an array of thermal vias (typically 0.3 mm pitch) under the EP to the inner ground layer. Keep the SWDIO and SWCLK traces short and away from switching signals to avoid debug interface noise. Source: Microchip SAM L11 hardware design guide recommendations.
The TrustZone-M security attribution table is locked during production programming and cannot be modified afterward. Plan secure/non-secure partition boundaries before generating the final firmware image. Additionally, the secure boot configuration fuses must be provisioned in a trusted programming environment - field updates that attempt to modify these fuses will trigger tamper detection. Source: Microchip SAM L11 family datasheet and TrustZone programming guide.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified - this is a commercial/industrial grade part for -40C to +85C operation. Halogen-free status not explicitly stated in verified web data.
