ATSAML11E16A-UUTKPH - 32MHz Cortex-M23 TrustZone MCU | Microchip
MPN: ATSAML11E16A-UUTKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $4.41 | $44.10 |
| 100 | $3.74 | $374.00 |
| 500 | $3.32 | $1,660.00 |
| 1,000 | $2.97 | $2,970.00 |
ATSAML11E16A-UUTKPH Overview
What is a low-power microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and peripherals on one die. Ultra-low-power MCUs target battery-operated endpoints such as IoT sensors, wearables, and smart meters, where power budget measured in microamps determines battery life. The SAM L11 family sits in the broader hierarchy: MCU -> ARM Cortex-M microcontroller -> low-power secure MCU -> IoT edge controller -> semiconductor.
Key features include a 32 MHz Cortex-M23 core with single-cycle I/O access, TrustZone-M for hardware-isolated secure firmware execution, on-chip cryptographic accelerators (AES, SHA, TRNG), and a 12-bit 1 MSPS ADC, 10-bit DAC, and analog comparators. The Enhanced Peripheral Touch Controller supports up to 256 buttons, while SERCOM modules provide configurable UART, SPI, and I2C interfaces. Sleep-mode current under 100 nA enables multi-year coin-cell operation.
The SAM L11 architecture pairs a Cortex-M23 core with TrustZone-M for hardware-enforced separation between secure and non-secure code. Secure boot, secure key storage in on-chip flash, and tamper detection (voltage, temperature, frequency, and active mesh) deliver chip-level security that traditionally required external secure elements. The on-chip DC-DC converter and Smart Sleep modes minimize active and idle energy, while the Event System allows peripherals to communicate without CPU wake-up.
Typical applications include IoT sensor nodes, secure medical wearables, smart-home and building automation endpoints, secure payment terminals, and battery-powered touch-interface products. The TrustZone capability targets devices requiring secure firmware update, secure boot, and protected key storage, while the PTC supports capacitive touch keypads and sliders in low-power HMI designs.
When designing with this device, allocate pin function priorities early because the WLCSP-32 pinout shares SERCOM, I/O, and PTC lines; reserve one SERCOM channel for debug and another for the host UART. The chip-level tamper pins require board-level shield routing and dedicated capacitors to meet the Microchip reference design guideline.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the standalone Microchip SAM L10/L11 datasheet, helping engineers compare variants and select the right package and temperature grade for IoT, medical, and industrial applications.
Drop-in alternatives for ATSAML11E16A-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 ATSAML11E16A-UUTKPH (same form factor and footprint) — differing in Core, Package, ADC, DAC, Key Provisioning.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E15A-UUTKPH
✅ Drop-In✓ In Stock
$2.01 / Unit
View Datasheet →ATSAML11E14A-UUTKPH
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →ATSAML11E16A-UUTKPH Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 |
| Core Architecture | ARMv8-M Baseline with TrustZone-M |
| Maximum Clock Frequency | 32 MHz |
| Program Memory Size (Flash) | 64 KB |
| SRAM Size | 16 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| ADC | 12-bit, up to 1 MSPS |
| DAC | 10-bit |
| Analog Comparator | Yes (AC) |
| Operational Amplifier | Yes (on-chip OPAMP) |
| Peripheral Touch Controller (PTC) | Enhanced, supports up to 256 buttons |
| Communication Interfaces | SERCOM (UART/SPI/I2C configurable) |
| Security Features | TrustZone-M, secure boot, secure key storage, tamper detection, AES, SHA, TRNG |
| Package | 32-pin WLCSP |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +85C |
| RoHS Status | Compliant |
| Key Provisioning | Factory key-provisioned (UUTKPH suffix) |
ATSAML11E16A-UUTKPH Pin Configuration
| Pin A1 | VDD — Digital supply voltage |
| Pin A2 | PA03 — General-purpose I/O / ADC AIN[1] |
| Pin A3 | PA04 — General-purpose I/O / ADC AIN[2] |
| Pin A4 | PA05 — General-purpose I/O / ADC AIN[3] |
| Pin A5 | PA06 — General-purpose I/O / ADC AIN[4] |
| Pin A6 | PA07 — General-purpose I/O / ADC AIN[5] |
| Pin A7 | VDDIO — I/O supply voltage |
| Pin B1 | VSS — Ground |
| Pin B2 | PA00 — General-purpose I/O / XIN |
| Pin B3 | PA01 — General-purpose I/O / XOUT |
| Pin B4 | PA02 — General-purpose I/O / ADC AIN[0] |
| Pin B5 | GND — Analog ground reference |
| Pin B6 | PA08 — General-purpose I/O / SERCOM |
| Pin B7 | PA09 — General-purpose I/O / SERCOM |
| Pin C1 | PA10 — General-purpose I/O / SERCOM |
| Pin C2 | PA11 — General-purpose I/O / SERCOM |
| Pin C3 | PA14 — General-purpose I/O / PTC X-line |
| Pin C4 | PA15 — General-purpose I/O / PTC Y-line |
| Pin C5 | PA16 — General-purpose I/O / SERCOM |
| Pin C6 | PA17 — General-purpose I/O / SERCOM |
| Pin C7 | PA18 — General-purpose I/O / SERCOM |
| Pin D1 | PA19 — General-purpose I/O / SERCOM |
| Pin D2 | PA20 — General-purpose I/O / SERCOM |
| Pin D3 | PA21 — General-purpose I/O / SERCOM |
| Pin D4 | PA22 — General-purpose I/O / SERCOM |
| Pin D5 | PA23 — General-purpose I/O / SERCOM |
| Pin D6 | PA24 — General-purpose I/O / SERCOM |
| Pin D7 | PA25 — General-purpose I/O / SERCOM |
| Pin E1 | RESET — Active-low reset input |
| Pin E2 | SWDIO — Serial wire debug data |
| Pin E3 | SWCLK — Serial wire debug clock |
| Pin E4 | PA27 — General-purpose I/O / tamper input |
| Pin E5 | PA28 — General-purpose I/O / tamper input |
| Pin E6 | PA30 — General-purpose I/O / SERCOM |
| Pin E7 | PA31 — General-purpose I/O / SERCOM |
Typical Applications
ATSAML11E16A-UUTKPH is suitable for 6 applications: Secure IoT Sensor Nodes, Medical Wearables and Health Monitors, Capacitive Touch Keypads and HMI, Secure Payment Terminals and Point-of-Sale, Smart Home and Building Automation, Industrial IoT Edge Sensors.
Secure IoT Sensor Nodes
The ATSAML11E16A-UUTKPH is well matched to battery-powered IoT sensor nodes thanks to its sub-25 uA/MHz active current and sub-100 nA sleep current, which enable multi-year coin-cell operation. TrustZone-M isolates authenticated firmware from the main application, allowing secure OTA update staging in the secure zone while the normal zone handles application logic; the on-chip AES, SHA, and TRNG eliminate external crypto ICs. A typical implementation pairs the MCU with a sub-GHz or BLE radio module, using one SERCOM channel for SPI to the radio and a second for a sensor I2C bus. The WLCSP-32 footprint suits compact wearable and industrial sensor housings where PCB area is constrained.
Recommended
Medical Wearables and Health Monitors
The ATSAML11E16A-UUTKPH fits medical wearable designs where low-power operation, small footprint, and hardware-isolated secure data handling are required. The integrated 12-bit ADC and on-chip OPAMP enable direct measurement of bioelectric signals, while TrustZone-M protects patient-identifiable data from application-level compromise. Sleep current under 100 nA extends battery life beyond typical wearable duty cycles, and the WLCSP-32 package fits wrist-worn form factors. The tamper-detection inputs support secure erase on enclosure breach, an important feature for medical data devices.
Recommended
Capacitive Touch Keypads and HMI
The ATSAML11E16A-UUTKPH integrates Microchip's Enhanced Peripheral Touch Controller supporting up to 256 capacitive buttons, sliders, and wheels, eliminating the need for an external touch IC in human-machine interface designs. Combined with the Cortex-M23's deterministic response and on-chip OPAMP for signal conditioning, the SAM L11 handles both touch processing and application logic on a single die. The WLCSP-32 footprint enables ultra-thin touch panel designs, and the device's low sleep current suits battery-powered remote controls and smart switches.
Recommended
Secure Payment Terminals and Point-of-Sale
Payment terminals and POS peripherals benefit from the ATSAML11E16A-UUTKPH's TrustZone-M hardware isolation, secure boot, on-chip AES/SHA/TRNG, and chip-level tamper detection. The factory key-provisioned UUTKPH variant allows OEMs to receive parts pre-loaded with cryptographic keys, reducing secure-manufacturing complexity. SERCOM peripherals support magnetic-stripe, EMV contact, and NFC contactless interfaces through external reader ICs, while the Cortex-M23 core handles transaction processing in a hardware-isolated secure zone.
Recommended
Smart Home and Building Automation
Smart-home hubs, occupancy sensors, and HVAC controllers leverage the ATSAML11E16A-UUTKPH's low-power modes, TrustZone-M security, and integrated peripherals. The device's sub-100 nA sleep current suits battery-powered door/window sensors with multi-year lifetime targets, while the Cortex-M23 core handles local control logic. Multiple SERCOM channels connect to radios (Zigbee, Thread, BLE), sensors, and actuators; on-chip ADC and comparators support analog sensing without external ICs. The tamper inputs protect against physical intrusion attempts in commercial building deployments.
Recommended
Industrial IoT Edge Sensors
Industrial sensor endpoints benefit from the ATSAML11E16A-UUTKPH's industrial -40C to +85C temperature range, hardware tamper detection, and secure firmware update capability. The integrated 12-bit ADC and OPAMP support direct connection to 4-20 mA loop sensors, bridge sensors, and RTDs with minimal external signal conditioning. TrustZone-M enables secure provisioning of device certificates and authenticated boot, important for Industry 4.0 deployments requiring device identity and tamper resistance. The WLCSP-32 footprint suits compact IP67 sensor housings, and SERCOM peripherals connect to RS-485, CAN, or wireless modems via external transceivers.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E16A-UUTKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E16A-AUTKPH | ATSAML11E15A-UUTKPH | ATSAML11E14A-UUTKPH | ATSAML11E16A-MFTKPH | ATSAML11E16A-MF | ATSAML11E16A-AFT |
|---|---|---|---|---|---|---|---|
| Package | 32-pin WLCSP | 32-pin TQFP (7x7 mm) | 32-pin WLCSP - same | 32-pin WLCSP - same | 32-pin QFN (5x5 mm) | 32-pin QFN (5x5 mm) | 32-pin TQFP (7x7 mm) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 64 KB | 64 KB | 32 KB | 16 KB | 64 KB | 64 KB | 64 KB |
| SRAM Size | 16 KB | 16 KB | 8 KB | 8 KB | 16 KB | 16 KB | 16 KB |
| TrustZone-M | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Factory Key-Provisioned | Yes (KPH suffix) | Yes | Yes | Yes | Yes | No (not provisioned) | No (not provisioned) |
| 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 | ARM Cortex-M23 32 MHz |
| Supply Voltage | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V | 1.62V to 3.63V |
Key Differentiators
- Factory key-provisioned variant with TrustZone-M hardware isolation (vs ATSAML11E16A-MF)
- WLCSP-32 package for compact IoT wearables (vs ATSAML11E16A-AUTKPH)
- 64KB Flash and 16KB SRAM headroom (vs ATSAML11E15A-UUTKPH)
Design Notes
Estimated: at 32 MHz active mode, the SAM L11 draws roughly 25 uA/MHz * 32 MHz = 800 uA active current per the Microchip datasheet. In sleep with RTC running, current drops to about 100 nA. For a typical IoT sensor duty cycle of 0.1% active, average current is approximately 800 uA * 0.001 + 100 nA = 0.9 uA average, giving an estimated CR2032 coin-cell lifetime near 3 years at 235 mAh capacity. Disable unused peripherals in the MCLK and APB mask registers to maintain sleep current near the 100 nA minimum; the on-chip DC-DC converter should be enabled via the SUPC->VREG.VREF.SEL bit per datasheet recommendation.
The WLCSP-32 package requires NSMD pads with diameter 0.25 mm and pitch 0.5 mm per Microchip package specification. Place a 4-layer PCB stackup with continuous GND plane directly beneath the WLCSP to provide thermal dissipation and a low-impedance return path for SERCOM and ADC signals. Decouple VDD and VDDIO with a 100 nF X7R capacitor within 2 mm of each supply pin, plus a bulk 4.7 uF tantalum or ceramic capacitor near the package. The tamper pin traces should be guarded with GND on both sides and routed on an inner PCB layer to prevent side-channel probing, per SAM L11 hardware security reference design.
Three common pitfalls when bringing up SAM L11 designs: (1) failing to configure the NVMCTRL secure region attributes before programming secure firmware, which causes TrustZone secure boot to fail silently; (2) leaving the ADC VREFA pin unconnected in differential or PGA modes, causing saturated readings; (3) using the WLCSP package with NSMD pads that are too small for the PCB assembly process, leading to tombstoning during reflow - verify the PCB fabrication house supports 0.25 mm pad diameter with 0.5 mm pitch. Always validate TrustZone secure boot before locking the MCU via the BOCOR fuse row.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade; AEC-Q100 qualified variants are not in the SAM L11 family - see SAM V71 for AEC-Q100 alternatives.
