ATSAML11D15A-MUKPH - 32KB Flash ARM Cortex-M23 Crypto MCU | Microchip
MPN: ATSAML11D15A-MUKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.62 | $36.20 |
| 100 | $3.21 | $321.00 |
| 500 | $2.86 | $1,430.00 |
| 1,000 | $2.55 | $2,550.00 |
ATSAML11D15A-MUKPH Overview
What is a low-power secure microcontroller? A low-power secure microcontroller is a single-chip processor that integrates CPU core, embedded Flash/SRAM, secure key storage, and hardware cryptography on one die. Within the embedded system hierarchy, the ATSAML11D15A belongs to the microcontroller (MCU) category, which sits below microprocessors and above simple digital logic ICs. Security-oriented MCUs add tamper detection, secure boot, and TrustZone-M isolation to prevent firmware extraction and code injection in connected IoT endpoints.
Key features include ARM TrustZone-M for hardware-isolated secure/non-secure code regions, secure key storage with crypto-acceleration, a True Random Number Generator (TRNG), and chip-level tamper resistance. The device supports up to 32 KB Flash and 8 KB SRAM, plus 2 KB data Flash. Peripherals include SERCOM (configurable as UART/SPI/I2C), 12-bit ADC, DAC, timers, RTC, and PTC touch controller for capacitive touch interfaces. The integrated crypto block supports AES, SHA, and secure key provisioning.
The ATSAML11D15A-MUKPH uses a 32-bit ARM Cortex-M23 core with single-cycle I/O access and a Memory Protection Unit (MPU). TrustZone-M enables isolation of secure firmware from non-secure application code, allowing OEMs to protect boot loaders, crypto keys, and IP. The exposed-pad VQFN-24 package provides a low thermal resistance path suitable for industrial operating ranges.
Typical applications include IoT endpoint security, secure authentication tokens, smart utility meters, secure payment terminals, and tamper-resistant industrial sensors. The 24-pin VQFN and low power consumption also make it suitable for battery-powered wearable security devices.
When designing with this MCU, allocate adequate decoupling (100 nF + 1 uF) close to VDD pins and provide a clean low-noise supply, as crypto operations are sensitive to VDD glitching. TrustZone-M requires careful linker script setup to partition secure/non-secure regions.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found on standard distributor listings.
Drop-in alternatives for ATSAML11D15A-MUKPH — 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-MUKPH (same form factor and footprint) — differing in Core Architecture, Package, Active Current, Operating Temperature, Security.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D15A-MU
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATSAML11D16A-MU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11E15A-MUT
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATSAML11E16A-MUKPH
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →ATSAML10E16A-MUT
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATSAML11D15A-MUKPH Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 24-pin VQFN (4x4 mm) with exposed pad |
| Security Features | ARM TrustZone-M, secure key storage, AES/SHA crypto, TRNG, tamper resistance |
| Active Mode Current | <25 uA/MHz |
| Sleep Mode Current | <100 nA |
| ADC | 12-bit |
| DAC | Yes |
| Communication Interfaces | SERCOM (UART/SPI/I2C configurable) |
| Touch Controller | PTC (Peripheral Touch Controller) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Key Provisioning | Pre-provisioned (per 'KPH' suffix) |
ATSAML11D15A-MUKPH Pin Configuration
| Pin 1 | VDD — Digital supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | PA00 — GPIO / SERCOM0 / ADC |
| Pin 4 | PA01 — GPIO / SERCOM0 / ADC |
| Pin 5 | PA02 — GPIO / SERCOM0 / ADC |
| Pin 6 | PA03 — GPIO / SERCOM0 / ADC |
| Pin 7 | PA04 — GPIO / SERCOM0 / ADC |
| Pin 8 | PA05 — GPIO / SERCOM0 / ADC |
| Pin 9 | PA06 — GPIO / SERCOM0 / ADC |
| Pin 10 | PA07 — GPIO / SERCOM0 / ADC |
| Pin 11 | PA08 — GPIO / SERCOM0 / ADC |
| Pin 12 | PA09 — GPIO / SERCOM0 / ADC |
| Pin 13 | PA10 — GPIO / SERCOM0 / ADC |
| Pin 14 | PA11 — GPIO / SERCOM0 / ADC |
| Pin 15 | PA14 — GPIO / SERCOM2 |
| Pin 16 | PA15 — GPIO / SERCOM2 |
| Pin 17 | PA16 — GPIO / SERCOM1 |
| Pin 18 | PA17 — GPIO / SERCOM1 |
| Pin 19 | PA18 — GPIO / SERCOM1 |
| Pin 20 | PA19 — GPIO / SERCOM1 |
| 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-MUKPH is suitable for 6 applications: Secure IoT Endpoints, Smart Utility Meters, Secure Payment Terminals, Authentication Tokens and Secure Elements, Tamper-Resistant Industrial Sensors, Wearable Health and Fitness Devices.
Secure IoT Endpoints
The ATSAML11D15A-MUKPH is purpose-built for TrustZone-M-based IoT endpoint security where hardware-isolated firmware protects credentials from remote code injection. Its integrated AES-128/256 and SHA-2 hardware crypto accelerators execute TLS handshakes at <25 uA/MHz active current, extending battery life in wireless sensors reporting every few minutes. The 32 KB Flash fits a minimal secure bootloader plus a non-secure application, and the KPH factory-provisioned keys enable zero-touch secure onboarding to cloud IoT platforms.
Recommended
Smart Utility Meters
In smart electricity, water, and gas meters, the ATSAML11D15A-MUKPH secures billing telemetry against physical tampering and remote spoofing. The chip-level tamper resistance triggers secure memory wipe on intrusion events, while TRNG generates nonces for authenticated firmware updates. Its <100 nA sleep current suits battery-backed metering that sleeps between hourly readings, and the 12-bit ADC plus integrated temperature sensor simplify metrology signal conditioning on the same die.
Recommended
Secure Payment Terminals
POS terminals and PIN-entry devices require PCI PTS-compliant key storage, which the ATSAML11D15A-MUKPH provides through hardware crypto and tamper detection. AES-256 encryption runs in a TrustZone-M secure world, isolating PIN handling from the merchant-facing application. The 24-VQFN 4x4 mm footprint fits compact handheld POS form factors, while the industrial -40 C to +85 C operating range supports outdoor vending and delivery scenarios.
Recommended
Authentication Tokens and Secure Elements
Hardware authentication tokens, FIDO2 security keys, and smart-card replacements benefit from the ATSAML11D15A-MUKPH's secure key storage and hardware AES/SHA. The KPH pre-provisioned keys remove the need for OEMs to run their own secure provisioning infrastructure. PTC peripheral touch controller enables touch-based user confirmation, while SERCOM ports drive USB-C or NFC interfaces for physical/logical credential transport.
Recommended
Tamper-Resistant Industrial Sensors
Industrial sensors in unattended or hostile environments need both field-grade security and robust environmental tolerance. The ATSAML11D15A-MUKPH delivers -40 C to +85 C operation, hardware tamper detection, and signed firmware updates to prevent sensor spoofing in SCADA networks. Its <25 uA/MHz active current supports multi-year battery deployments, while the SERCOM peripherals connect to UART, SPI, or I2C field-sensor front ends without external glue logic.
Recommended
Wearable Health and Fitness Devices
Battery-powered wearables that capture sensitive biometric data require low-power compute plus strong security, both delivered by the ATSAML11D15A-MUKPH. The <100 nA sleep current preserves coin-cell life across weeks of use, while TrustZone-M isolates health data storage from connectivity stacks that may run untrusted code. The PTC peripheral touch controller enables touch/swipe UI without mechanical buttons, supporting IP67 sealed wearable enclosures.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D15A-MUKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-MUT | ATSAML11D15A-MU | ATSAML11D16A-MU | ATSAML11E15A-MUT | ATSAML10E16A-MUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-24 (4x4) with EP | VQFN-24 (4x4) - same | VQFN-24 (4x4) - same | VQFN-24 (4x4) - same | VQFN-24 (4x4) - same | VQFN-24 (4x4) - same |
| Core | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 32 KB | 64 KB (+100%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB (+100%) |
| TrustZone-M | Yes | Yes | Yes | Yes | Yes | No (L10 family) |
| Hardware Crypto | AES/SHA + TRNG | AES/SHA + TRNG | AES/SHA + TRNG | AES/SHA + TRNG | AES/SHA + TRNG | Not present |
| Key Provisioning | Factory pre-provisioned (KPH) | Standard (non-KPH) | Standard (non-KPH) | Standard (non-KPH) | Standard (non-KPH) | Not applicable |
| 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 |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Factory-provisioned secure keys (KPH suffix) (vs ATSAML11D15A-MUT)
- Industry's lowest-power Cortex-M23 with TrustZone-M (vs Generic Cortex-M23 MCUs)
- Compact 24-VQFN 4x4 mm with exposed pad (vs 48-pin SAM L11 variants)
- Integrated AES-128/256, SHA-2, and TRNG (vs ATSAML10E16A-MUT (L10 family))
Design Notes
Place a 100 nF decoupling capacitor as close as possible to each VDD pin and a bulk 1 uF to 4.7 uF capacitor near the device. The exposed pad (EP) must be soldered to a low-impedance ground plane for both thermal dissipation and electrical reference. For battery applications using the <100 nA sleep current, ensure no pull-up leakage paths bypass the MCU into always-on circuitry.
Keep the SWDIO and SWCLK traces short and routed away from switching power or RF traces to avoid debugger interference. The 24-VQFN 4x4 mm package requires careful fanout - use 0.2 mm trace width with 0.2 mm spacing on inner layers for signal escape under the package. Place the exposed-pad via array directly under the EP in a 3x3 grid for thermal and electrical performance.
TrustZone-M secure boot validation requires reliable VDD during startup - a brown-out during crypto key derivation can leave the secure state undefined. Implement external voltage monitoring if the supply can dip below 1.62 V during hot-plug events. When using SERCOM in I2C mode, place 2.2 kohm to 10 kohm pull-ups on SDA/SCL and respect the 400 kHz Fast Mode timing budget.
Do not confuse the ATSAML11D15A-MUKPH (tray-packaged, pre-provisioned keys) with the -MUT (tape-and-reel, non-provisioned) for production orders - selecting the wrong suffix can lock you out of the secure boot flow. The KPH suffix assumes the OEM has registered their public key with Microchip for factory provisioning. Always verify the TrustZone-M linker script partitions match the actual secure/non-secure memory map before flashing production firmware.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - this is an industrial-grade MCU. For automotive secure applications consult Microchip's SAM L11 AEC-Q100 variants.
