ATSAML11D15A-MUTKPH - 32KB Flash Cortex-M23 MCU | Microchip
MPN: ATSAML11D15A-MUTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.61 | $1.61 |
| 10 | $1.49 | $14.90 |
| 100 | $1.34 | $134.00 |
| 500 | $1.19 | $595.00 |
| 1,000 | $1.05 | $1,050.00 |
ATSAML11D15A-MUTKPH Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, volatile and non-volatile memory, peripherals, and I/O. The Cortex-M23 core is an ARMv8-M baseline implementation optimized for energy efficiency and deterministic interrupt response, sitting between the Cortex-M0+ (smallest) and Cortex-M3/M4 (mid-range) in the ARM MCU hierarchy. MCU -> 32-bit MCU -> ARM Cortex-M MCU -> Cortex-M23 sub-family -> Microchip SAM L11 family -> this specific ATSAML11D15A-MUTKPH part. MCUs combine processor, memory, and peripherals to enable embedded control functions without external logic.
Key features include TrustZone for ARMv8-M hardware isolation between secure and non-secure code, hardware cryptographic accelerators (AES, SHA, TRNG), secure boot and secure key storage with OTP, enhanced Peripheral Touch Controller (PTC) supporting touch buttons/sliders/proximity, SERCOM (configurable serial communication) interfaces, 12-bit ADC, and multiple timer/counter channels. The 24-pin VQFN package also includes an exposed pad for thermal dissipation. The part supports an extended operating temperature range, with the KPH suffix denoting the key-provisioned, tape-and-reel configuration.
Architecturally, the SAM L11 combines a Cortex-M23 core with a Cortex-M0+ auxiliary core for security functions (TrustZone-aware isolation), a hardware crypto subsystem, secure boot ROM, and SRAM partitioning between secure and non-secure regions. The Peripheral Touch Controller (PTC) uses the QTouch library and supports both self-capacitance and mutual-capacitance touch sensing. Compared to the SAM L10 (no TrustZone), the L11 adds hardware crypto and secure boot, doubling the Flash/SRAM budget in some configurations and enabling use cases that require certified firmware updates.
Typical applications include secure IoT endpoints requiring authenticated firmware updates (thermostats, door locks, industrial sensors), secure payment terminals and key fobs, battery-powered wearables and medical sensors with touch HMI, factory automation nodes with secure commissioning, and consumer appliances needing OTA updates. The combination of TrustZone, hardware crypto, and ultra-low-power sleep makes the part well suited to devices that must stay in the field for years on a single coin cell while remaining resilient to physical tamper.
When designing with the ATSAML11D15A-MUTKPH, allocate the secure / non-secure memory partition early in firmware architecture. Place cryptographic keys, boot loaders, and OTA-verification code in the secure region, leaving non-secure code free to use the full Cortex-M23 instruction set. The exposed pad on the VQFN-24 must be soldered to a continuous ground copper pour for thermal and electrical performance. Per the datasheet, bypass VDD with a 100 nF and 1 uF ceramic pair placed within 3 mm of the pin, and use the PTC's reference design layout when implementing touch electrodes.
This page synthesizes distributor pricing, drop-in alternatives from the same SAM L11 family and cross-brand Cortex-M23/M0+ MCU equivalents, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for ATSAML11D15A-MUTKPH — 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-MUTKPH (same form factor and footprint) — differing in Package, Core, Operating Temperature, Active Current, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E15A-MUTKPH
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-MUT
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →ATSAML11D15A-MU
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →ATSAML11E16A-MUTKPH
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10D15A-MF
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →STM32L011F4P6
✅ Drop-In✓ In Stock
$0.46 / Unit
View Datasheet →ATSAML11D15A-MUTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (32-bit, single-core) |
| Instruction Set | ARMv8-M Baseline with TrustZone |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Package | VQFN-24 (4x4 mm) with exposed pad |
| Pin/Package Type | 24-pin VQFN EP T/R |
| Peripherals | AES, SHA, TRNG, secure boot, PTC, SERCOM x6, ADC 12-bit, timers, RTC, WDT |
| Touch Controller | Enhanced Peripheral Touch Controller (PTC) |
| Operating Temperature | Extended grade (suffix 85 / industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL 3 (per JEDEC J-STD-020) |
| Packaging | Tape & Reel (MUTKPH suffix = key provisioned, T&R) |
| Security Features | TrustZone-M, secure key storage, hardware crypto (AES/SHA/TRNG), secure boot, chip-level tamper resistance |
| Connectivity | I2C, SPI, UART/USART, LIN (via SERCOM) |
ATSAML11D15A-MUTKPH Pin Configuration
| Pin 1 | PA02/AIN0 — GPIO / ADC input channel 0 (verify per datasheet) |
| Pin 2 | PA03/REF — GPIO / ADC reference voltage (verify per datasheet) |
| Pin 3 | GND — Ground |
| Pin 4 | VDD — Digital supply voltage 1.62 V to 3.63 V |
| Pin 5 | PA04 — GPIO / SERCOM (verify per datasheet) |
| Pin 6 | PA05 — GPIO / SERCOM (verify per datasheet) |
| Pin 7 | PA06 — GPIO / SERCOM (verify per datasheet) |
| Pin 8 | PA07 — GPIO / SERCOM / I2C SDA (verify per datasheet) |
| Pin 9 | PA08 — GPIO / SERCOM (verify per datasheet) |
| Pin 10 | PA09 — GPIO / SERCOM (verify per datasheet) |
| Pin 11 | PA10 — GPIO / SERCOM (verify per datasheet) |
| Pin 12 | PA11 — GPIO / SERCOM (verify per datasheet) |
| Pin 13 | GND — Ground (verify per datasheet) |
| Pin 14 | VDD — Digital supply voltage (verify per datasheet) |
| Pin 15 | PA14/XIN — GPIO / external crystal input (verify per datasheet) |
| Pin 16 | PA15/XOUT — GPIO / external crystal output (verify per datasheet) |
| Pin 17 | PA16 — GPIO / SERCOM / I2C SCL (verify per datasheet) |
| Pin 18 | PA17 — GPIO / SERCOM / SPI MOSI (verify per datasheet) |
| Pin 19 | PA18 — GPIO / SERCOM / SPI SCK (verify per datasheet) |
| Pin 20 | PA19 — GPIO / SERCOM / SPI MISO (verify per datasheet) |
| Pin 21 | RESET — Active-low reset input (verify per datasheet) |
| Pin 22 | SWDIO — Serial Wire Debug I/O (verify per datasheet) |
| Pin 23 | SWCLK — Serial Wire Debug clock (verify per datasheet) |
| Pin 24 | EP — Exposed pad - solder to continuous GND copper pour |
Typical Applications
ATSAML11D15A-MUTKPH is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Door Locks and Access Control, Industrial Sensor Hubs with Touch HMI, Battery-Powered Medical Wearables, Smart Home Touch Panels, Secure Payment and Key Fob Terminals.
Secure IoT Sensor Nodes
The ATSAML11D15A-MUTKPH is well-suited to battery-powered IoT sensor endpoints that require authenticated firmware updates. Its < 25 uA/MHz active current and < 100 nA sleep current allow coin-cell lifetimes measured in years, while ARM TrustZone-M isolates secure bootloader code from the application. The hardware AES-128, SHA-256, and TRNG accelerate TLS handshakes and signed firmware verification without CPU overhead. The enhanced PTC supports capacitive wake-up or proximity triggers without an external sensor IC, reducing BOM. Engineers typically connect the part to a sub-GHz radio such as the SX1276 via SERCOM SPI and route sensor data through secure non-volatile storage.
Recommended
Smart Door Locks and Access Control
The SAM L11's TrustZone-M hardware isolation and secure key storage make it a strong fit for electronic locks that must resist physical tamper. The chip-level tamper resistance and secure boot ROM prevent firmware extraction even with direct package access, addressing common attack vectors on consumer smart locks. The 32 KB Flash holds a secure credential store plus the access-control application, while the PTC supports capacitive touch on the lock face. The 1.62 V to 3.63 V operating range allows direct 2xAA or LiSOCl2 battery operation. Reference designs pair this MCU with a BLE module such as the RN4870 for smartphone credentialing.
Recommended
Industrial Sensor Hubs with Touch HMI
Factory automation nodes need deterministic response, secure remote commissioning, and low standby current. The ATSAML11D15A-MUTKPH delivers 32 MHz Cortex-M23 performance with TrustZone isolation between the commissioning firmware and the application, plus six SERCOM channels to bridge I2C sensor arrays, SPI ADCs, and UART fieldbuses. The enhanced PTC supports up to 32 mutual-capacitance touch buttons behind a 3 mm glass overlay, eliminating mechanical switches in harsh industrial environments. < 100 nA sleep current enables battery-backed sensor hubs that survive mains interruption. Per Microchip's SAM L11 industrial reference design, the part integrates cleanly with IO-Link PHY ICs.
Recommended
Battery-Powered Medical Wearables
Wearable medical sensors such as continuous glucose monitors, pulse oximeters, and ECG patches demand multi-day battery life and secure patient data. The ATSAML11D15A-MUTKPH's < 25 uA/MHz active current plus < 100 nA sleep supports coin-cell operation, while TrustZone-M and hardware AES protect HIPAA-grade patient telemetry. The 12-bit ADC at up to 1 MSPS captures bioelectric signals, and six SERCOMs drive BLE, displays, and sensors. The enhanced PTC supports gesture or touch wake-up without an additional controller. Note: medical device certification is the integrator's responsibility; the MCU itself does not carry FDA or IEC 60601 clearance.
Recommended
Smart Home Touch Panels
The enhanced Peripheral Touch Controller and TrustZone-M make this MCU an excellent choice for smart-home control panels with secure cloud connectivity. The PTC supports mutual-capacitance sliders and proximity wake-up behind a 5 mm plastic overlay, eliminating mechanical buttons. Six SERCOM channels drive a TFT display over SPI, a Wi-Fi module over UART, and Zigbee or Thread radios. TrustZone isolates the secure cloud credential store from the application. The VQFN-24 exposed pad simplifies PCB thermal management in fanless wall-mount enclosures.
Recommended
Secure Payment and Key Fob Terminals
Contactless payment terminals and key fobs require hardware root-of-trust, secure firmware, and tamper resistance. The ATSAML11D15A-MUTKPH integrates a Cortex-M0+ security core that manages TrustZone boundaries, secure key storage, and chip-level tamper response, satisfying payment industry architectural expectations. Hardware AES-128, SHA-256, and TRNG accelerate EMVCo transaction signing. The 32 KB Flash is sufficient for a payment application plus the secure bootloader, with 8 KB SRAM buffering transaction data. The VQFN-24 footprint fits into ISO 14443 antenna PCBs used in NFC payment designs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D15A-MUTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E15A-MUTKPH | ATSAML11D14A-MUT | ATSAML11D15A-MU | ATSAML11E16A-MUTKPH | ATSAML10D15A-MF |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | VQFN-24 (4x4 mm) EP | VQFN-24 (4x4 mm) EP - same | VQFN-24 (4x4 mm) EP - same | VQFN-24 (4x4 mm) EP - same | VQFN-24 (4x4 mm) EP - same | VQFN-24 (4x4 mm) EP - same |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| TrustZone-M | Yes | Yes | Yes | Yes | Yes | No |
| Hardware Crypto | AES-128 / SHA-256 / TRNG | AES-128 / SHA-256 / TRNG | AES-128 / SHA-256 / TRNG | AES-128 / SHA-256 / TRNG | AES-128 / SHA-256 / TRNG | None |
| Flash | 32 KB | 64 KB | 16 KB | 32 KB | 64 KB | 32 KB |
| SRAM | 8 KB | 16 KB | 8 KB | 8 KB | 16 KB | 8 KB |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.62 V - 3.63 V | 1.62 V - 3.63 V | 1.62 V - 3.63 V | 1.62 V - 3.63 V | 1.62 V - 3.63 V | 1.62 V - 3.63 V |
| Sleep Current | < 100 nA | < 100 nA | < 100 nA | < 100 nA | < 100 nA | < 100 nA |
| Key Provisioned | Yes (KPH) | Yes (KPH) | No | No | Yes (KPH) | No |
Key Differentiators
- Industry-first Cortex-M23 with TrustZone-M (vs ATSAML10D15A-MF)
- Hardware crypto accelerators (vs ATSAML10D15A-MF)
- Higher Flash / SRAM budget than D14 sibling (vs ATSAML11D14A-MUT)
- Key-provisioned (KPH) variant (vs ATSAML11D15A-MU)
- Enhanced Peripheral Touch Controller (vs ATSAM3N00BA-MU)
Design Notes
Place a 100 nF decoupling capacitor within 3 mm of each VDD pin and a single 1 uF bulk capacitor on the same supply rail, per the Microchip SAM L11 hardware design checklist. Decoupling capacitors should use X7R or X5R ceramic dielectric to maintain capacitance at the 1.62 V supply floor. For battery-powered designs using a buck converter, route the converter output directly to VDD with the bulk cap placed near the converter output, not the MCU, to localize switching noise.
The VQFN-24 package exposes a thermal pad on the underside (pin 24 / EP). Solder this pad to a continuous ground copper pour with at least 8 thermal vias to the inner ground plane to meet the datasheet thermal resistance spec. A non-soldered exposed pad can raise junction temperature by 20-40 C under typical SAM L11 loads, triggering thermal shutdown during high-duty Secure Element operations.
When TrustZone-M is enabled, the 32 KB Flash is partitioned between secure and non-secure regions, so the non-secure application sees less than the headline 32 KB. Plan firmware architecture before enabling TrustZone, and use Microchip's MPLAB Harmony Configurator (MHC) to define the secure / non-secure boundary. Avoid placing OTA verification code in the non-secure region - it must remain in secure to verify signatures before boot.
Route the SWDIO and SWCLK traces (pins 22-23) as a matched pair no longer than 50 mm, with a ground guard trace or ground plane underneath, to avoid debugger noise during programming. Add a 100 kohm pull-up on SWDIO and a 100 kohm pull-down on SWCLK to prevent spurious debugger attachment. The RESET pin (pin 21) needs a 10 kohm pull-up and a 1 nF to 100 nF capacitor for debouncing.
When using the enhanced Peripheral Touch Controller (PTC), follow Microchip's QTouch Layout Guide for electrode spacing, ground fill hatching, and guard-ring layout. Keep switching power and high-frequency signals at least 10 mm from touch electrodes, and use a hatched ground fill (not a solid pour) under the touch area to minimize parasitic capacitance. Reference design files are available in the Atmel START IDE.
Compliance Information
RoHS compliant and lead-free per Microchip product page. MSL 3 moisture sensitivity per JEDEC J-STD-020. Not AEC-Q100 qualified - this is an industrial / IoT-grade part. For automotive applications use the ATSAML11D15A-MUTKVAO automotive variant.
