ATSAML11E15A-UUTKPH - 32KB Flash ARM Cortex-M23 MCU | Microchip
MPN: ATSAML11E15A-UUTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.27 | $1,135.00 |
| 1,000 | $2.01 | $2,010.00 |
ATSAML11E15A-UUTKPH Overview
A microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and programmable peripherals on a single chip. The SAM L11 belongs to the sub-category of ultra-low-power MCUs within the broader class of 32-bit ARM Cortex-M microcontrollers, which are widely used in battery-powered and energy-harvesting embedded applications where active current, sleep current, and security boundaries directly impact product lifetime and certification.
Key features include secure key storage, chip-level tamper resistance, hardware cryptographic accelerators, a built-in PTC (Peripheral Touch Controller), multiple SERCOM serial interfaces, ADC, DAC, OPAMP, and AC peripherals. TrustZone-M enables isolation between secure and non-secure code regions, allowing IP protection, secure boot, and credential provisioning - differentiating the SAM L11 from general-purpose Cortex-M23 parts.
The architecture integrates a Cortex-M23 core (Armv8-M Baseline) with single-cycle I/O access, an 8-channel event system, and a low-power 12-bit ADC. The security subsystem includes secure boot, secure debug, true random number generator (TRNG), AES-256, SHA-256, and ECC hardware accelerators, alongside Microchip's TrustZone-aware SecureBoot architecture. The 'KPH' suffix indicates key-provisioned factory provisioning with a customer-supplied root key for production-grade secure deployments.
Typical applications include IoT end nodes, secure sensor hubs, smart utility metering, secure wearables, medical sensor patches, and tamper-resistant payment terminals. The TrustZone-M separation and factory-provisioned keys are particularly valuable for any device that handles credentials, performs attestation, or stores device identities in the field.
When designing with the SAM L11, ensure that TrustZone regions are planned during code partitioning; mixing secure and non-secure peripherals requires careful linker and NVIC configuration. For battery life estimation, the dominant figure is the 100 nA retention sleep current rather than the active 25 µA/MHz figure.
This page synthesizes distributor pricing, drop-in alternatives from the SAML11 family and Microchip's broader ultra-low-power portfolio, and practical TrustZone-M design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for ATSAML11E15A-UUTKPH — 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-UUTKPH (same form factor and footprint) — differing in Core, Package, SRAM, ADC, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E14A-UUTKPH
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →ATSAML11E16A-UUTKPH
✅ Drop-In✓ In Stock
$2.97 / Unit
View Datasheet →ATSAML11E15A-UUTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (Armv8-M Baseline) |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 32 KB |
| SRAM | 8 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Current (typical) | <25 µA/MHz |
| Sleep Current (typical) | <100 nA (retention) |
| Security | ARM TrustZone-M, Secure Boot, Secure Debug |
| Cryptographic Accelerators | AES-256, SHA-256, ECC, TRNG |
| ADC | 12-bit SAR ADC |
| DAC | 10-bit DAC |
| Peripheral Touch Controller | Yes (built-in PTC) |
| SERCOM Interfaces | Up to 6 (configurable UART/SPI/I2C) |
| Package | 32-pin WLCSP |
| Operating Temperature | -40 °C to +85 °C |
| RoHS Status | Compliant |
| Key Provisioning | Yes (factory provisioned, KPH suffix) |
ATSAML11E15A-UUTKPH 32-pin wlcsp Pin Configuration Guide
Pin configuration for ATSAML11E15A-UUTKPH (32-pin wlcsp package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAML11E15A-UUTKPH.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAML11E15A-UUTKPH is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Utility Metering, Secure Wearable Health Devices, Tamper-Resistant Payment Terminals, Industrial Sensor Hubs, Battery-Powered Remote Controls.
Secure IoT Sensor Nodes
The ATSAML11E15A-UUTKPH's less than 100 nA sleep retention current and less than 25 µA/MHz active current make it ideal for battery-powered IoT sensor nodes that spend most of their life in sleep. TrustZone-M plus the factory-provisioned KPH keys allow authenticated sensor readings and secure OTA firmware updates, addressing emerging IoT security standards. The integrated 12-bit ADC and 6 SERCOM channels let a single part handle analog sensing plus UART/SPI/I²C connectivity. Designers gain multi-year coin-cell life combined with hardware-rooted device identity.
Recommended
Smart Utility Metering
Utility meters require tamper-resistant security and ultra-low standby power, both delivered by the ATSAML11E15A-UUTKPH. TrustZone-M isolates metering firmware and keys from non-secure application code, while the 100 nA retention sleep allows the meter to wake only on consumption events. The 32 KB Flash is sufficient for metering stacks plus a secure bootloader. Built-in PTC enables capacitive user interface buttons without external touch ICs, reducing BOM cost in high-volume meter deployments.
Recommended
Secure Wearable Health Devices
Wearable health patches and bands require both low power and credential protection for HIPAA/GDPR-sensitive data. The ATSAML11E15A-UUTKPH's Cortex-M23 core handles BLE companion control and sensor fusion while TrustZone-M protects biometric data and device identity. The 8 KB SRAM supports small RTOS kernels, and 32 KB Flash fits OTA-capable firmware. Sub-100 nA sleep enables multi-week battery life on small Li-ion or coin cells typical of wearable form factors.
Recommended
Tamper-Resistant Payment Terminals
POS terminals and PIN pads demand hardware-rooted key storage and secure boot, both delivered by the factory-provisioned ATSAML11E15A-UUTKPH. TrustZone-M isolates payment logic from application code, while built-in AES-256/SHA-256/ECC accelerators handle transaction crypto with deterministic latency. The 32-pin WLCSP enables compact PCB layouts suited to handheld POS form factors. Combined with Microchip's CryptoAuthLib, designers can meet PCI PTS 5.x requirements.
Recommended
Industrial Sensor Hubs
Industrial sensor hubs consolidate field sensor data and need both deterministic real-time performance and IP protection. The ATSAML11E15A-UUTKPH's Cortex-M23 core runs at 32 MHz with single-cycle I/O, while TrustZone-M protects proprietary sensor-calibration algorithms loaded at manufacture. Wide 1.62-3.63 V supply tolerance accommodates 3.3 V industrial rails and energy-harvesting supplies. The PTC and ADC support direct connection to capacitive proximity sensors and analog transducers without external signal conditioning.
Recommended
Battery-Powered Remote Controls
Voice remotes, smart locks, and key fobs require years of standby from a coin cell. The ATSAML11E15A-UUTKPH's 100 nA sleep, integrated PTC for capacitive buttons, and built-in IR timer peripherals eliminate external components. TrustZone-M and KPH-provisioned keys prevent cloning of smart-lock credentials and IR pairing codes. The 32 KB Flash accommodates voice-command wake-word libraries plus a secure bootloader. Operating down to 1.62 V allows the cell to be used to near-end-of-life voltage.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E15A-UUTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E15A-MU | ATSAML11E15A-MFT | ATSAML11E15A-AUT | ATSAML11E14A-UUTKPH | ATSAML11E16A-UUTKPH |
|---|---|---|---|---|---|---|
| Package | 32-pin WLCSP | QFN-32 (different) | QFN-32 (different) | TQFP-32 (different) | 32-pin WLCSP (same) | 32-pin WLCSP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB |
| 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 | Yes |
| Factory Key Provisioning | Yes (KPH) | No | No | No | Yes (KPH) | Yes (KPH) |
| AEC-Q100 Automotive | No | No | No | Yes | No | No |
| Active Current | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz |
Key Differentiators
- Factory-provisioned keys for production deployment (vs ATSAML11E15A-MU)
- Larger Flash budget for feature growth (vs ATSAML11E14A-UUTKPH)
- Ultra-low-power Cortex-M23 with hardware crypto (vs ATSAML10E16A-MU)
Design Notes
Estimated: TrustZone-M partitioning must be planned at project start; mixing secure and non-secure peripherals requires linker script setup with NVMCTRL and IDAU regions. Configuring the BOOTPROT bits before locking the device is irreversible on production silicon, so always validate on SAML11 Xplained Pro boards first. Microchip's TrustZone example projects in Atmel Studio provide reference linker scripts.
Battery-life estimation should use the 100 nA retention sleep figure as the dominant steady-state term, not the 25 µA/MHz active figure. A sensor node waking once per minute and running at 32 MHz for 5 ms spends most of its life in retention, so the average current is dominated by sleep leakage and wake transitions. Use the DC-DC buck mode on the SAML11 Xplained Pro for accurate measurements.
The 32-pin WLCSP requires NSMD pads with 0.4 mm pitch and a 0.25 mm solder mask opening per Microchip application note. Place a 4-layer PCB with continuous ground plane under the package to manage thermal dissipation and reduce noise on ADC channels. Decoupling capacitors must be placed within 2 mm of the VDDCORE and VDDIO pins.
Compliance Information
RoHS and REACH compliant per Microchip product page. Standard ATSAML11E15A-UUTKPH is not AEC-Q100 qualified - choose ATSAML11E15A-AUT for automotive. KPH suffix denotes factory key provisioning, not automotive qualification.
