ATSAML11E16A-MUKPH - Cortex-M23 MCU, TrustZone, 64KB Flash | Microchip
MPN: ATSAML11E16A-MUKPH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.15 | $215.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.55 | $1,550.00 |
ATSAML11E16A-MUKPH Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), working memory (SRAM), peripherals, and I/O into one package. The Cortex-M23 specifically is an ARMv8-M Baseline architecture core designed for energy-efficient deterministic embedded computing. Within the broader taxonomy, this device sits inside the Microcontroller > ARM Cortex-M > Cortex-M23 subfamily > ultra-low-power secure MCU product tree. TrustZone-M is the smallest Cortex-M variant that supports hardware-enforced security partitioning, making it suitable for IoT edge devices that must protect keys and firmware from physical and remote attacks.
Key features include active-mode current below 25 uA/MHz, sleep-mode current below 100 nA with full SRAM retention, a 12-bit 1 Msps ADC, a 10-bit DAC, two analog comparators, one operational amplifier, a Peripheral Touch Controller (PTC) supporting capacitive touch, and up to six SERCOM serial interfaces configurable as I2C, SPI, or USART/UART. The device also offers LINbus support, a 16-bit timer/counter array, and Real-Time Clock with calendar. Operating voltage spans 1.62 V to 3.63 V across the -40 C to +85 C industrial temperature range.
The SAM L11 architecture implements secure boot, secure firmware update, secure debug, and anti-tamper detection, with key provisioning baked into the part number suffix. The TrustZone Security Attribution Unit (SAU) and Implementation Defined Attribution Unit (IDAU) partition flash, RAM, and peripherals into secure/non-secure regions. The Cortex-M23 core includes a single-cycle hardware multiplier and a hardware divider, deterministic interrupt latency with NVIC, and WFI/WFE sleep modes.
Typical applications include IoT end nodes with secure firmware update, smart meters and utility metering, access control and authentication tokens, secure wireless sensor nodes, medical wearables requiring FDA-grade data protection, and industrial control modules needing cryptographic identity. The 32-pin VQFN footprint suits space-constrained PCB designs, while the integrated PTC eliminates external touch controllers, reducing BOM cost by 15 to 30 percent.
When designing with this device, allocate the TrustZone linker regions early in the project because secure pin/peripheral assignment cannot be undone without re-flashing the chip's NVM bits. Decouple VDDIO and VDDANA separately per the SAM L10/L11 family datasheet, and follow the Microchip ASF/MPLAB Harmony start-up sequence to avoid NVMCTRL lock-up. The -MUKPH suffix indicates tray packing with secure key provisioning at the factory.
This page synthesizes distributor stock, drop-in alternatives from the SAM L10/L11 family and competing 32-pin VQFN Cortex-M23 MCUs, and practical secure-MCU design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAML11E16A-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 ATSAML11E16A-MUKPH (same form factor and footprint) — differing in Package, Core Architecture, ADC, Operating Temperature, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E16A-AUKPH
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11E16A-MFTKPH
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →ATSAML11E16A-AFT
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →ATSAML11E16A-MF
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →ATSAML11E15A-MU
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →ATSAML11E14A-AUT
✅ Drop-In✓ In Stock
$1.34 / Unit
View Datasheet →ATSAML11E16A-MUKPH Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 (ARMv8-M Baseline) |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 64 KB |
| SRAM | 16 KB |
| EEPROM | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current (Full SRAM Retention) | < 100 nA |
| Security | ARM TrustZone-M, Crypto Accelerator (AES/SHA/TRNG), Secure Key Storage |
| ADC | 12-bit, up to 1 Msps |
| DAC | 10-bit |
| Analog Peripherals | 2x AC, 1x OPAMP |
| Touch Controller | Peripheral Touch Controller (PTC), capacitive |
| Serial Interfaces | Up to 6x SERCOM (I2C/SPI/USART), LINbus |
| Package | 32-pin VQFN (5x5 mm) with exposed pad |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Packing | Tray, factory key-provisioned |
ATSAML11E16A-MUKPH Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM / ADC |
| Pin 2 | PA01 — GPIO / SERCOM / ADC |
| Pin 3 | PA02 — GPIO / SERCOM / AIN0 / DAC |
| Pin 4 | PA03 — GPIO / SERCOM / AIN1 / REF |
| Pin 5 | GND — Ground |
| Pin 6 | VDDIO — I/O supply voltage |
| Pin 7 | VDDANA — Analog supply voltage |
| Pin 8 | PA04 — GPIO / SERCOM / AIN2 / OPAMP+ |
| Pin 9 | PA05 — GPIO / SERCOM / AIN3 / OPAMP- |
| Pin 10 | PA06 — GPIO / SERCOM / AIN4 |
| Pin 11 | PA07 — GPIO / SERCOM / AIN5 |
| Pin 12 | PA08 — GPIO / SERCOM / AIN6 |
| Pin 13 | PA09 — GPIO / SERCOM / AIN7 |
| Pin 14 | PA10 — GPIO / SERCOM / AIN8 |
| Pin 15 | PA11 — GPIO / SERCOM / AIN9 |
| Pin 16 | PA12 — GPIO / SERCOM / AIN10 |
| Pin 17 | PA13 — GPIO / SERCOM / AIN11 |
| Pin 18 | PA14 — GPIO / SERCOM / AIN14 |
| Pin 19 | PA15 — GPIO / SERCOM / AIN15 |
| Pin 20 | PA16 — GPIO / SERCOM / I2C SDA |
| Pin 21 | PA17 — GPIO / SERCOM / I2C SCL |
| Pin 22 | PA18 — GPIO / SERCOM / XIN |
| Pin 23 | PA19 — GPIO / SERCOM / XOUT |
| Pin 24 | PA20 — GPIO / SERCOM |
| Pin 25 | PA21 — GPIO / SERCOM |
| Pin 26 | PA22 — GPIO / SERCOM |
| Pin 27 | PA23 — GPIO / SERCOM |
| Pin 28 | PA24 — GPIO / SERCOM |
| Pin 29 | PA25 — GPIO / SERCOM |
| Pin 30 | PA27 — GPIO / SERCOM / SWDIO |
| Pin 31 | PA28 — GPIO / SERCOM / SWCLK |
| Pin 32 | RESET — Reset input (active-low) |
Typical Applications
ATSAML11E16A-MUKPH is suitable for 7 applications: Secure IoT End Nodes, Smart Utility Meters, Medical Wearables and Patches, Industrial Secure Sensor Modules, Access Control and Authentication Tokens, Capacitive Touch User Interfaces, Smart Home Wireless Sensor Nodes.
Secure IoT End Nodes
The ATSAML11E16A-MUKPH is well suited for battery-powered IoT end nodes that require hardware-isolated secure firmware updates and encrypted sensor telemetry. TrustZone-M enforces secure/non-secure bus partitioning so the radio stack cannot read device certificates or root keys stored in secure Flash. The Crypto Accelerator offloads AES-128 and SHA-256 at < 25 uA/MHz, leaving the Cortex-M23 core free to run the application. Active current stays low while sleep current drops below 100 nA with full 16 KB SRAM retention, enabling multi-year coin-cell operation on remote sensor motes, smart locks, and asset trackers.
Recommended
Smart Utility Meters
Smart electricity, water, and gas meters benefit from the ATSAML11E16A-MUKPH's anti-tamper secure key storage and signed firmware update capabilities. The TrustZone-M SAU isolates the metrology library in secure memory so billing firmware cannot be tampered with by unauthorized parties, satisfying IEC 62055-31 and ANSI C12.20 requirements. The 12-bit 1 Msps ADC captures current/voltage waveforms with sufficient resolution for Class 0.5 metering accuracy, while the integrated OPAMP and analog comparators handle front-end signal conditioning without external analog ICs. Operating from -40 C to +85 C, the device survives outdoor meter installations.
Recommended
Medical Wearables and Patches
Medical wearables such as continuous glucose monitors, ECG patches, and sleep trackers benefit from the ATSAML11E16A-MUKPH's ultra-low sleep current below 100 nA and hardware-isolated patient data protection. TrustZone-M ensures HIPAA/GDPR-compliant storage of personal health information in secure regions of Flash, while the Crypto Accelerator accelerates AES encryption during wireless transmission to a paired phone. The integrated Peripheral Touch Controller supports capacitive buttons on wearable enclosures without extra ICs, and the 12-bit ADC captures bioelectric signals such as ECG and galvanic skin response. Battery life extends to multiple weeks per charge at typical duty cycles.
Recommended
Industrial Secure Sensor Modules
Industrial vibration, pressure, and position sensor modules deployed in factory automation use the ATSAML11E16A-MUKPH to authenticate data on edge before forwarding to PLCs. The Crypto Accelerator signs sensor packets with SHA-256 HMAC for tamper detection, while TrustZone-M protects proprietary calibration constants from IP theft during module reprogramming. The six SERCOM channels simultaneously drive I2C sensors, SPI ADCs, RS-485 transceivers, and UART diagnostics. Operating from -40 C to +85 C with industrial-grade ESD ratings, the device survives harsh factory environments near motors and welders.
Recommended
Access Control and Authentication Tokens
Physical access control readers and authentication tokens benefit from the ATSAML11E16A-MUKPH's hardware root-of-trust through secure key storage and TrustZone-M secure boot. The device verifies signed firmware at every power-up, preventing insertion of malicious code into access control panels. Its Cortex-M23 core executes OSDP or Wiegand protocols to door controllers, while the integrated PTC reads capacitive touch keys for PIN entry. With active current under 25 uA/MHz and deep-sleep under 100 nA, the MCU runs multi-month battery-powered credential cards without frequent battery replacement.
Recommended
Capacitive Touch User Interfaces
Consumer appliances, kitchen equipment, and industrial HMI panels benefit from the ATSAML11E16A-MUKPH's integrated Peripheral Touch Controller (PTC) supporting up to 256 touch buttons or a touch wheel without external touch ICs. The TrustZone-M secure boot ensures that firmware controlling safety-critical appliances such as cooktops cannot be reflashed with unauthorized code. SERCOM channels drive I2C LCDs, SPI LED drivers, and UART communication to a master controller. With 64 KB Flash and 16 KB SRAM, the device fits rich UI state machines while keeping the BOM low by eliminating discrete touch controllers.
Recommended
Smart Home Wireless Sensor Nodes
Battery-powered smart-home sensors for doors, windows, leaks, and air quality benefit from the ATSAML11E16A-MUKPH's deep-sleep current below 100 nA with full 16 KB SRAM retention, enabling multi-year operation on a single CR2032 cell. TrustZone-M secures Zigbee or Thread commissioning credentials, while the six SERCOM channels connect to sub-GHz radios, I2C environmental sensors, and SPI accelerometers. The integrated 12-bit ADC reads battery voltage directly, eliminating external voltage dividers and saving PCB area. The 32-pin VQFN 5x5 mm footprint fits inside small sensor puck enclosures used throughout smart-home installations.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E16A-MUKPH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E16A-AUKPH | ATSAML11E16A-MFTKPH | ATSAML11E16A-AFT | ATSAML11E15A-MU | ATSAML11E14A-AUT |
|---|---|---|---|---|---|---|
| Package | 32-pin VQFN (5x5 mm) | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same | 32-pin VQFN (5x5 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ARM Cortex-M23 32 MHz | ||
| Flash | 64 KB | 64 KB | 32 KB (-50%) | 16 KB (-75%) | ||
| SRAM | 16 KB | 16 KB | 8 KB (-50%) | 8 KB (-50%) | ||
| TrustZone-M | Yes | Yes | Yes | Yes | ||
| Crypto Accelerator | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | ||
| Active Current | < 25 uA/MHz | < 25 uA/MHz | < 25 uA/MHz | < 25 uA/MHz | ||
| Sleep Current | < 100 nA | < 100 nA | < 100 nA | < 100 nA | ||
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | ||
| Packing | Tray, key-provisioned | Tape & Reel, key-provisioned | Tray | Tape & Reel |
Key Differentiators
- Hardware-isolated secure boot and key storage (vs ATSAML10E16A-MUT)
- Crypto Accelerator offloads AES/SHA from CPU (vs ATSAML11E15A-MU)
- Lowest-power Cortex-M23 with PTC integrated (vs Generic Cortex-M0+ MCUs)
- Factory key-provisioned with secure lifecycle (vs ATSAML11E16A-AFT)
Design Notes
The ATSAML11E16A-MUKPH must be powered by separate VDDIO and VDDANA rails per the SAM L10/L11 family datasheet. Apply both rails from the same source through ferrite beads if analog noise isolation is needed, but do not exceed 3.63 V on either rail. The MCU enters Backup mode at < 100 nA when both SERCOM and timers are disabled; wake-up sources include RTC, external interrupts, and the PTC scanner.
At full 32 MHz operation across all peripherals, the 32-pin VQFN package dissipates under 100 mW. The exposed thermal pad must be soldered to a continuous ground plane of at least 100 mm squared on the top or bottom layer for theta_JA performance. Without the thermal pad soldered, junction temperature can rise 30 C above ambient at 85 C ambient, reducing long-term reliability.
Route the SWDIO (PA27) and SWCLK (PA28) signals as a 2-wire debug pair with a maximum length of 100 mm, keeping them away from switching power and SERCOM lines. Decouple VDDIO and VDDANA with separate 100 nF X7R capacitors placed within 5 mm of the respective pins, plus a 10 uF bulk capacitor shared between both rails. Keep the exposed pad continuous under the IC and stitch vias around the perimeter to the internal ground plane.
Do not leave the NVMCTRL security bit lock-word unlocked in production firmware - the ATSAML11E16A-MUKPH ships with TrustZone-M pre-configured, but firmware can disable secure boot if the lock-bits are cleared. Use MPLAB Harmony's NVMCTRL driver with BOOTPROT and SECPROT set, and verify with a readback of the User Row registers before sealing the chip. Also avoid using PA30/PA31 as GPIO because they are reserved for the 32 kHz crystal on most SAM L11 packages.
When using the SERCOM peripherals in I2C Fast Mode Plus (1 MHz), add 4.7 kohm pull-ups to VDDIO and keep traces under 50 mm. For SPI at 12 MHz, source-terminate with 33 ohm series resistors if the bus exceeds 25 mm. The 12-bit ADC achieves 1 Msps only with a low-impedance input driver (< 50 ohm) and a 100 nF COG bypass on AVDD; ceramic X7R capacitors are NOT recommended for the ADC reference pin.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 not qualified - this is an industrial-grade -40 to +85 C part; not intended for AEC-Q100 automotive applications. Lead-free and halogen-free per Microchip environmental compliance documentation.
