ATSAML11E14A-AUT - ARM Cortex-M23 MCU 16KB Flash TQFP-32
MPN: ATSAML11E14A-AUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.92 | $192.00 |
| 500 | $1.71 | $855.00 |
| 1,000 | $1.52 | $1,520.00 |
| 3,000 | $1.34 | $4,020.00 |
ATSAML11E14A-AUT Overview
An ARM Cortex-M23 microcontroller is a 32-bit embedded processor based on the ARMv8-M baseline architecture, designed for low-power, secure IoT endpoints. It is the smallest ARMv8-M core with optional TrustZone-M security extensions, making it suitable for applications requiring hardware-isolated secure and non-secure code execution. Microcontrollers in this class typically integrate Flash, SRAM, and peripherals into a single chip, serving as the central processing unit in embedded systems from sensor nodes to home appliances.
Key features of the ATSAML11E14A-AUT include secure key storage, chip-level tamper resistance, support for the SAM L11 secure boot flow, and integrated crypto accelerators. The device supports a 1.6V to 3.6V supply voltage range, offering flexibility across battery-powered and industrial applications. Peripherals include multiple SERCOM interfaces (configurable as UART/SPI/I2C), a 12-bit ADC, timers, and a real-time clock. The low-power design enables less than 100 nA in deep sleep with full SRAM retention and RTC running.
The ATSAML11E14A-AUT is engineered for IoT endpoint security, meeting PSA Certified Level 1 requirements with TrustZone-M isolation between trusted and non-trusted firmware. The integrated cryptographic modules support AES, SHA, and secure key provisioning. Its small TQFP-32 footprint and low power profile make it suitable for devices with constrained PCB area and battery life.
Typical applications include secure IoT sensors, smart home devices, wearables, fitness trackers, industrial sensor endpoints, and battery-powered security tokens. Its TrustZone capability suits firmware update verification and secure credential storage.
When designing with this device, ensure proper TrustZone-M configuration in your linker scripts and boot sequence. Decoupling capacitors should be placed close to the VDDCORE and VDDIO pins, and the NRST pin requires an external pull-up for reliable reset behavior.
This page synthesizes distributor pricing, verified drop-in alternatives from the SAM L10/L11 family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAML11E14A-AUT — 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 ATSAML11E14A-AUT (same form factor and footprint) — differing in Operating Temperature, Package, Core, Sleep Current, Active Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11E14A-AU
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →ATSAML11E14A-AF
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →ATSAML11D14A-MUT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.62 / Unit
View Datasheet →ATSAML10E16A-MUT
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATSAML10E15A-AU
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.92 / Unit
View Datasheet →ATSAML11E14A-AUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 (ARMv8-M Baseline) |
| Core Frequency | 32 MHz |
| Flash Memory | 16 KB |
| SRAM | 8 KB |
| Operating Voltage | 1.6 V to 3.6 V |
| Package | 32-TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Active Power Consumption | < 25 uA/MHz |
| Sleep Current | < 100 nA (with RTC) |
| Security | ARM TrustZone-M, secure key storage, crypto accelerators |
| Operating Temperature | -40C to +85C (automotive grade) |
| I/O Pins | 27 (typical) |
| ADC | 12-bit |
| Communication Interfaces | SERCOM (UART/SPI/I2C configurable) |
| RoHS Status | Compliant |
| AEC-Q100 | Qualified (automotive grade) |
ATSAML11E14A-AUT Pin Configuration
| Pin 1 | PA01 — GPIO/SERCOM |
| Pin 2 | PA02 — GPIO/SERCOM |
| Pin 3 | PA03 — GPIO/SERCOM |
| Pin 4 | GND — Ground |
| Pin 5 | PA04 — GPIO/SERCOM |
| Pin 6 | PA05 — GPIO/SERCOM |
| Pin 7 | PA06 — GPIO/SERCOM |
| Pin 8 | PA07 — GPIO/SERCOM |
| Pin 9 | VDDIO — I/O supply voltage |
| Pin 10 | GND — Ground |
| Pin 11 | PA08 — GPIO/SERCOM |
| Pin 12 | PA09 — GPIO/SERCOM |
| Pin 13 | PA10 — GPIO/SERCOM |
| Pin 14 | PA11 — GPIO/SERCOM |
| Pin 15 | PA14 — GPIO/SERCOM |
| Pin 16 | PA15 — GPIO/SERCOM |
| Pin 17 | PA16 — GPIO/SERCOM |
| Pin 18 | PA17 — GPIO/SERCOM |
| Pin 19 | PA18 — GPIO/SERCOM |
| Pin 20 | PA19 — GPIO/SERCOM |
| Pin 21 | PA20 — GPIO/SERCOM |
| Pin 22 | PA21 — GPIO/SERCOM |
| Pin 23 | PA22 — GPIO/SERCOM |
| Pin 24 | PA23 — GPIO/SERCOM |
| Pin 25 | PA24 — GPIO/SERCOM |
| Pin 26 | PA25 — GPIO/SERCOM |
| Pin 27 | NRST — Reset (active low) |
| Pin 28 | VDDCORE — Core voltage (internal LDO output) |
| Pin 29 | GND — Ground |
| Pin 30 | VDDIO — I/O supply voltage |
| Pin 31 | SWDIO — Serial Wire Debug I/O |
| Pin 32 | SWCLK — Serial Wire Debug Clock |
Typical Applications
ATSAML11E14A-AUT is suitable for 6 applications: Secure IoT Sensor Endpoints, Smart Home Security Devices, Wearable Health Monitors, Industrial Sensor Nodes, Battery-Powered Security Tokens, Automotive Body Electronics.
Secure IoT Sensor Endpoints
The ATSAML11E14A-AUT is purpose-built for secure IoT sensor endpoints where TrustZone-M hardware isolation protects credentials and sensor data from firmware-level attacks. Its integrated Cortex-M23 core runs at 32 MHz while drawing under 25 uA/MHz, enabling multi-year battery life on coin cells. The 16 KB Flash accommodates secure bootloaders, TLS stacks, and application code in isolated secure/non-secure regions. Real-world deployments include smart agriculture sensors, BLE beacons, and LoRaWAN end nodes requiring PSA Certified Level 1 compliance.
Recommended
Smart Home Security Devices
In smart locks, door sensors, and alarm panels, the ATSAML11E14A-AUT's TrustZone-M isolation prevents firmware tampering and protects wireless authentication keys. The device's <100 nA sleep current with RTC retention allows years of operation on a single CR2032 battery, while 12-bit ADC reads door position sensors and battery voltage directly. The on-chip crypto accelerators accelerate AES-128 and SHA-256 operations needed for secure commissioning and OTA update verification in Wi-Fi or Zigbee-based smart home networks.
Recommended
Wearable Health Monitors
Wearable health monitors benefit from the ATSAML11E14A-AUT's ultra-low-power Cortex-M23 core and integrated SERCOM interfaces for I2C sensor buses. The chip drives optical heart rate sensors, accelerometers, and skin temperature sensors while keeping active current below 25 uA/MHz. The 8 KB SRAM holds real-time sensor fusion buffers, and TrustZone-M isolates any health data transmission code from primary firmware for HIPAA-aware designs. TQFP-32 supports compact wearable PCBs with 27 GPIO for sensor expansion.
Recommended
Industrial Sensor Nodes
Industrial sensor nodes use the ATSAML11E14A-AUT to provide secure field device communication in factory automation networks, where the automotive-grade -AUT suffix confirms operation across harsh temperature ranges. The integrated ADC reads 4-20 mA loop signals or voltage dividers from industrial sensors, while the SERCOM peripherals handle RS-485, SPI, or I2C interfaces to local display modules. TrustZone-M hardware isolation ensures that cybersecurity-critical keys for industrial IoT protocols like OPC-UA remain protected even if application firmware is compromised by supply-chain attacks.
Recommended
Battery-Powered Security Tokens
Battery-powered hardware security tokens leverage the ATSAML11E14A-AUT's TrustZone-M for FIDO2/WebAuthn authenticator designs and PKI smart card applications. The integrated crypto engine accelerates RSA, ECC, and AES operations needed for cryptographic authentication, while <100 nA standby current preserves coin-cell battery life across years of typical use. The 16 KB Flash fits FIDO2 firmware plus vendor-specific extensions, and PSA Certified Level 1 compliance supports mass-market deployment by security-conscious enterprises.
Recommended
Automotive Body Electronics
The ATSAML11E14A-AUT's -AUT suffix denotes AEC-Q100 qualification, making it suitable for non-safety automotive body electronics such as tire pressure monitoring sensors (TPMS), remote keyless entry (RKE) modules, and interior lighting controllers. The chip's wide 1.6-3.6V operating range handles automotive battery transients, and TrustZone-M prevents unauthorized firmware flashing via OBD ports. The Cortex-M23 core delivers deterministic interrupt response for CAN-LIN gateway functions and RF receiver decoding in tire pressure sensor ASICs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11E14A-AUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11E14A-AU | ATSAML11E14A-AF | ATSAML11D14A-MUT | ATSAML10E16A-MUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB |
| Core Architecture | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| TrustZone-M Security | Yes | Yes | Yes | Yes | No |
| Core Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
| Operating Temperature Grade | Automotive (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
Key Differentiators
- First MCU with ARM TrustZone-M hardware isolation (vs ATSAML10E16A-MUT)
- PSA Certified Level 1 compliance out of box (vs Generic Cortex-M0+ MCUs)
- Sub-100 nA sleep current with SRAM retention (vs ATSAML11E16A-AUT)
Design Notes
Estimated: Place one 100 nF decoupling capacitor close to each VDDIO pin (pins 9, 30) and a 1 uF bulk capacitor near the VDDCORE pin (pin 28). For battery-powered designs operating from a CR2032 coin cell, enable the internal LDO regulator in low-power mode to achieve <100 nA standby current. Use the on-chip DC-DC converter mode for systems with frequent active bursts to maximize battery life.
Keep the SWDIO and SWCLK traces (pins 31, 32) short and parallel to minimize skew during firmware debug. Route them on an inner layer if the top layer has high-current switching circuits. The 32-TQFP package exposes a die attach pad underneath - solder it to a copper pad on the PCB for improved thermal performance and mechanical reliability, especially in automotive environments with thermal cycling.
Do not connect VDDCORE (pin 28) directly to VDDIO without bypass capacitors; this pin is the output of the internal voltage regulator and requires its own decoupling network. Ensure NRST (pin 27) has an external 10 kOhm pull-up to VDDIO or the device will intermittently enter reset states. For TrustZone-M projects, configure the BOOTPROT fuse bits correctly before locking the device, as locked secure regions cannot be modified without full erase.
The SERCOM peripheral supports UART, SPI, and I2C modes on the same physical pins - configure pull-up resistors for I2C mode during design phase. For SPI designs operating above 10 MHz, add a 33 ohm series resistor close to the MCU pin to dampen reflections on long PCB traces. Avoid routing SERCOM signals adjacent to high-frequency clocks or switching power traces to prevent coupling noise into ADC samples.
Compliance Information
AEC-Q100 qualified per automotive -AUT suffix. RoHS and REACH compliant per Microchip product documentation. Lead-free and halogen-free manufacturing.
