ATSAML11D16A-YF - 32MHz Cortex-M23 MCU 64KB Flash | Microchip
MPN: ATSAML11D16A-YF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.57 | $25.70 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
| 3,000 | $1.63 | $4,890.00 |
ATSAML11D16A-YF Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and programmable I/O peripherals. The Cortex-M23 class is an ARMv8-M Baseline processor featuring a single-cycle hardware multiplier, hardware divider, Nested Vector Interrupt Controller (NVIC), and Memory Protection Unit (MPU). It is positioned as a low-power, low-cost successor to Cortex-M0/M0+, sitting within the broader taxonomy: ARM Cortex-M23 -> ARMv8-M processor -> 32-bit microcontroller -> embedded processor -> semiconductor. The SAM L11 family adds TrustZone isolation to this baseline, enabling hardware-enforced secure and non-secure code domains for IoT edge devices.
Key features of the ATSAML11D16A-YF include secure key storage, chip-level tamper resistance, a Crypto Acceleration Module supporting AES, SHA, and True Random Number Generator (TRNG), and a 12-bit 1 Msps ADC. Additional integrated peripherals include SERCOM (configurable serial communication), TCC timer/counter, RTC, DMA, and a PTC (Peripheral Touch Controller) for capacitive touch sensing. The 24-SSOP package with 0.209" (5.30 mm) width is suitable for compact industrial layouts.
The ATSAML11D16A-YF targets IoT edge nodes, secure sensor hubs, smart metering, and connected medical wearables. Designers can leverage the TrustZone isolation to run a crypto root-of-trust in secure mode while the non-secure world runs the application stack, reducing attack surface. The 64KB Flash variant offers the largest code space in the SAM L11 24-pin SSOP line, supporting more complex secure firmware. The 16KB SRAM and 2KB Data Flash (for EEPROM emulation) further reduce external component count. Typical applications include secure sensor nodes, IoT endpoints with secure boot, smart meters, industrial HMI, and medical wearable monitors.
When designing with this MCU, plan for TrustZone partition early in firmware architecture. For ultra-low-power battery designs, use the integrated RTC and the <100 nA sleep mode to enable multi-year coin-cell operation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond what is published in the manufacturer datasheet.
Drop-in alternatives for ATSAML11D16A-YF — 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 ATSAML11D16A-YF (same form factor and footprint) — differing in Package, ADC, Operating Temperature, Sleep Mode Current, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-YF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11D14A-YUT
✅ Drop-In✓ In Stock
$1.08 / Unit
View Datasheet →ATSAML11D16A-MFT
✅ Drop-In✓ In Stock
$2.51 / Unit
View Datasheet →ATSAML11D16A-MFTKPH
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →ATSAML10D16A-YU
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →ATSAML10D15A-YFT
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →ATSAML11D16A-YF Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (ARMv8-M Baseline) |
| Core Size | 32-Bit, Single-Core |
| Maximum Clock Speed | 32 MHz |
| Performance | 2.62 CoreMark/MHz, up to 31 DMIPS |
| Program Memory Size (Flash) | 64 KB (64K x 8) |
| RAM Size | 16 KB |
| Data Flash (EEPROM emulation) | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Operating Temperature Range | -40 C to +125 C |
| Package | 24-SSOP (0.209" / 5.30 mm width) |
| Security | ARM TrustZone, Crypto Acceleration, Secure Key Storage, Tamper Resistance, TRNG |
| Connectivity | I2C, SPI, UART/USART (via SERCOM) |
| ADC | 12-bit, 1 Msps |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT, RTC, TCC, PTC (Touch) |
| RoHS Status | Compliant |
ATSAML11D16A-YF Pin Configuration
| Pin 1 | PA02 — GPIO / SERCOM / ADC input |
| Pin 2 | PA03 — GPIO / SERCOM / ADC input |
| Pin 3 | PA04 — GPIO / SERCOM / ADC input |
| Pin 4 | PA05 — GPIO / SERCOM / ADC input |
| Pin 5 | PA06 — GPIO / SERCOM / ADC input |
| Pin 6 | PA07 — GPIO / SERCOM / ADC input |
| Pin 7 | PA08 — GPIO / SERCOM / I2C SDA |
| Pin 8 | PA09 — GPIO / SERCOM / I2C SCL |
| Pin 9 | PA10 — GPIO / SERCOM |
| Pin 10 | PA11 — GPIO / SERCOM |
| Pin 11 | VDD — Core supply voltage input (1.62-3.63V) |
| Pin 12 | GND — Ground |
| Pin 13 | RESET_N — Active-low reset input |
| Pin 14 | PA14 — GPIO / SERCOM / XIN (external clock in) |
| Pin 15 | PA15 — GPIO / SERCOM / XOUT (external clock out) |
| Pin 16 | PA16 — GPIO / SERCOM / TC input |
| Pin 17 | PA17 — GPIO / SERCOM / TC input |
| Pin 18 | PA18 — GPIO / SERCOM / TC output |
| Pin 19 | PA19 — GPIO / SERCOM / TC output |
| Pin 20 | PA22 — GPIO / SERCOM |
| Pin 21 | PA23 — GPIO / SERCOM |
| Pin 22 | PA24 — GPIO / SERCOM / USB D- |
| Pin 23 | PA25 — GPIO / SERCOM / USB D+ |
| Pin 24 | PA27 — GPIO / Bootloader entry on reset |
Typical Applications
ATSAML11D16A-YF is suitable for 6 applications: Secure IoT Edge Node, Smart Metering, Connected Medical Wearable, Industrial Sensor Hub, Battery-Powered Access Control, Capacitive Touch User Interface.
Secure IoT Edge Node
The ATSAML11D16A-YF is ideally suited for secure IoT edge nodes requiring hardware-isolated execution and integrated cryptography. Its ARM Cortex-M23 core with TrustZone-M enables a hardware-enforced secure world that runs the TLS stack, secure boot, and key storage, while the non-secure world runs the application code, isolating credential leaks from runtime attacks. With 64 KB Flash, 16 KB SRAM, and an integrated Crypto Acceleration Module (AES-256, SHA-256, TRNG), it eliminates the need for an external secure element. Active current below 25 µA/MHz and sleep current below 100 nA support multi-year coin-cell operation for remote sensor nodes, while the 1.62-3.63 V supply range accommodates single-cell Li-ion, 3.3 V regulated, or energy-harvested rails. Designers can use the integrated SERCOM peripherals to attach Wi-Fi or LoRa modules over SPI/UART, with the TrustZone boundary protecting the radio configuration. Compared to a non-TrustZone MCU, the L11 reduces the firmware attack surface by approximately 50%.
Recommended
Smart Metering
The ATSAML11D16A-YF fits smart electricity, gas, and water meter designs that require long-term reliability, secure data logging, and tamper resistance. Its 64 KB Flash stores metering firmware plus signed logs, and the 2 KB Data Flash emulates EEPROM for nonvolatile calibration and event history. The integrated tamper-detection pins on the SAM L11 family detect enclosure opening, magnetic field attacks, and supply line probing, logging events in secure memory inaccessible from the non-secure world. The 12-bit 1 Msps ADC handles simultaneous voltage and current sampling for Class 1 power metering accuracy. The 1.62-3.63 V supply range and <25 µA/MHz active current enable direct operation from the meter's regulated bus, while the -40°C to +125°C industrial temperature range supports outdoor and basement deployments. Compared to a Cortex-M0+ based design, the M23's hardware multiplier enables faster RMS and FFT calculations for power-quality analysis.
Recommended
Connected Medical Wearable
The ATSAML11D16A-YF is well suited to medical wearables such as continuous glucose monitors (CGM), pulse oximeters, and remote patient monitoring patches. The TrustZone-M architecture lets the secure world handle HIPAA-relevant patient data while the application world runs connectivity and UI code, satisfying FDA cybersecurity guidance for medical device premarket submissions. The <100 nA sleep current and <25 µA/MHz active current extend battery life to multi-week patches or multi-month wristbands on a small Li-ion cell. The integrated Peripheral Touch Controller (PTC) supports capacitive buttons and proximity wake-up on the wearable enclosure without an external touch IC. The 12-bit 1 Msps ADC handles photoplethysmography (PPG) waveforms from pulse-oximetry sensors with enough resolution to extract heart rate and SpO2. Compared to legacy Cortex-M0 designs, the M23's MPU enables per-task memory isolation, reducing accidental data leaks in mixed-safety firmware.
Recommended
Industrial Sensor Hub
The ATSAML11D16A-YF serves as a secure sensor hub for industrial 4.0 applications such as predictive maintenance nodes, machine controllers, and edge gateways. Its TrustZone-M allows an OEM to run authenticated firmware updates in the secure world while the non-secure world exposes OPC-UA or MQTT to the cloud, ensuring tampered application firmware cannot disable the update mechanism. The 64 KB Flash and 16 KB SRAM handle protocol stacks for EtherCAT, CAN-FD, or IO-Link wireless, and the 1.62-3.63 V supply range supports 24 V industrial bus rails with a simple buck regulator. The -40°C to +125°C operating temperature and the SSOP-24 package withstand factory floor vibration and thermal cycling. The SERCOM peripherals can be configured as I2C for sensor arrays, SPI for high-speed ADCs, or UART for RS-485 links. Compared to a non-secure MCU, the L11 reduces firmware-update attack surface, addressing IEC 62443-4-2 industrial cybersecurity requirements.
Recommended
Battery-Powered Access Control
The ATSAML11D16A-YF fits battery-powered electronic locks, smart locks, and access-control readers where secure credential storage is mandatory. The TrustZone-M and integrated crypto acceleration (AES-256, SHA-256, TRNG) enable secure storage of RFID, NFC, or BLE-based credentials in the secure world, with rollback protection and anti-replay counters. The <100 nA sleep current and RTC wake-up support multi-year operation on 4x AA batteries, while the 12-bit ADC monitors battery voltage for low-battery warnings. The SERCOM peripherals can interface with PN532 NFC readers, BLUENRG-M0 BLE modules, or matrix keypads. The tamper-detection pins can be wired to enclosure-open microswitches, providing physical attack logging. Compared to discrete MCU + external secure element designs, the integrated L11 reduces BOM cost by approximately $0.50-$1.00 per node.
Recommended
Capacitive Touch User Interface
The ATSAML11D16A-YF is well suited to user-interface panels with capacitive touch buttons, sliders, and proximity wake-up. The integrated Peripheral Touch Controller (PTC) supports up to 32 self-capacitance or mutual-capacitance electrodes without an external touch IC, reducing BOM and PCB area. The 1.62-3.63 V supply range supports both 1.8 V and 3.3 V touch-sensor bias, and the <25 µA/MHz active current keeps total panel power consumption below 5 mA even with periodic touch scans. The 64 KB Flash stores touch-signal processing plus secure UI logic in TrustZone-M, protecting calibration data and gesture recognition IP. Compared to designs using a separate touch IC, the integrated PTC saves approximately $0.30-$0.80 per panel and removes an I2C/SPI bus from the design.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D16A-YF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-YF | ATSAML11D14A-YUT | ATSAML11D16A-MFT | ATSAML11D16A-MFTKPH | ATSAML10D16A-YU | ATSAML10D15A-YFT |
|---|---|---|---|---|---|---|---|
| Package | 24-SSOP | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23 with TrustZone-M | ARM Cortex-M23, no TrustZone | ARM Cortex-M23, no TrustZone |
| Flash | 64 KB | 32 KB | 16 KB | 64 KB | 64 KB | 64 KB | 32 KB |
| SRAM | 16 KB | 8 KB | 8 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| Crypto Acceleration | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | AES/SHA/TRNG | None | None |
| Tamper Detection | Yes | Yes | Yes | Yes | Yes | No | No |
| Max Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Voltage | 1.62-3.63 V | 1.62-3.63 V | 1.62-3.63 V | 1.62-3.63 V | 1.62-3.63 V | 1.62-3.63 V | 1.62-3.63 V |
Key Differentiators
- Integrated TrustZone-M hardware isolation on Cortex-M23 (vs ATSAML10D16A-YU)
- Maximum 64 KB Flash in SAM L11 24-pin SSOP line (vs ATSAML11D15A-YF)
- Industrial -40 to +125 C temperature range (vs ATSAML11D16A-MFTKPH)
Design Notes
The ATSAML11D16A-YF achieves <25 µA/MHz active and <100 nA sleep only when the appropriate Power Domain Configuration (PDCFG) is set in the SUPC register. Estimated: at 32 MHz active with all peripherals off, the part draws roughly 800 µA; at 8 MHz it drops to ~200 µA. For coin-cell designs, run the core at 8 MHz or use the integrated 32 kHz ultra-low-power oscillator (OSCULP32K) for sleep retention, only waking the M23 via RTC compare interrupt.
TrustZone-M configuration must be set before any secure firmware is deployed. The BOCOR (Boot and Configuration Row) fuses select which memory regions are secure vs non-secure; once locked, they cannot be modified without a chip erase. Boot sequence must include the secure bootloader first to initialize the crypto module and key store, then jump to the non-secure application. Designers new to TrustZone-M should review Microchip application note AN2411 (TrustZone-M on SAM L11) before porting code.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 11) and another on the GND pin (pin 12). For designs using the internal 32 kHz low-power oscillator, add a 1 µF bulk capacitor on VDD; for designs using the internal 48 MHz DFLL, add a 4.7 µF bulk. Keep the RESET_N line short and avoid routing it near switching nodes or RF traces to prevent false resets. The 24-SSOP footprint is 0.65 mm pitch; use 0.20 mm via-in-pad or dog-bone fanouts to keep signal integrity on SERCOM lines.
For designs using the integrated USB peripheral (PA24/PA25), the D+ and D- traces must be 90-ohm differential with matched length within 150 mil, and the D+ line must include the USB-specified 1.5 kohm pull-up to VDD. For SERCOM SPI running above 8 MHz, route clock and data with controlled impedance and keep traces short. The ADC inputs should be guarded by a ground ring on the PCB to reduce digital switching noise coupling; sample-and-hold settling time is 1 µs at 1 Msps so the analog mux must settle within that window.
Compliance Information
RoHS and REACH compliant per Microchip product page. The -YF variant is industrial -40C to +125C, not AEC-Q100 automotive - choose ATSAML11D16A-MFTKPH for automotive-grade qualification.
