ATSAML11D14A-YU - 32MHz Cortex-M23 MCU, 16KB Flash, TrustZone-M | Microchip
MPN: ATSAML11D14A-YU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.84 | $2.84 |
| 10 | $2.56 | $25.60 |
| 100 | $2.27 | $227.00 |
| 500 | $1.97 | $985.00 |
| 1,000 | $1.65 | $1,650.00 |
ATSAML11D14A-YU Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), data memory (SRAM), and a wide range of peripherals. Within the MCU hierarchy, the ATSAML11D14A-YU belongs to the Cortex-M23 sub-family (low-power entry-level core in the Cortex-M lineup), within the SAM L family (low-power microcontrollers), within the broader SAM family of Microchip 32-bit ARM microcontrollers, which itself sits under the wider category of embedded microcontrollers and semiconductors.
Key security and integration features include secure key storage, chip-level tamper resistance, ARM TrustZone-M hardware isolation, hardware cryptographic acceleration, and a peripheral touch controller. The 24-SSOP package supports industrial temperature ranges and is drop-in compatible with other SAM L11 family variants in the same pinout, allowing PCB reuse across memory-size or feature-set changes.
The architecture combines the energy-efficiency of Cortex-M23 with hardware-level isolation between secure and non-secure code regions. TrustZone-M enables designers to isolate firmware IP, cryptographic keys, and secure boot routines from application code, reducing firmware attack surface in IoT endpoints. The integrated PTC and analog peripherals remove the need for external touch ASICs or op-amps in many designs.
Typical applications include secure IoT endpoints, smart-home sensors, low-power wireless sensor nodes, secure token devices, tamper-resistant industrial controllers, and consumer products requiring on-chip touch. The combination of low active current, deep-sleep sub-100 nA current, and TrustZone-M makes it a strong fit for battery-operated, security-conscious products.
When designing with this MCU, follow the Microchip SAM L11 datasheet's startup and TrustZone-M configuration flow, and budget for the secure boot region when partitioning Flash between secure and non-secure code.
This page synthesizes distributor pricing, drop-in SAM L11 alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for ATSAML11D14A-YU — 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 ATSAML11D14A-YU (same form factor and footprint) — differing in Package, ADC, SRAM, Core, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML11D15A-AU
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATSAML11D16A-YU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML11E14A-AU
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →ATSAML10D14A-MF
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →ATSAML10E16A-MUT
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →ATSAML10D16A-YU
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →ATSAML11D14A-YU Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 |
| Core Architecture | 32-bit RISC |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| SRAM | 8 KB |
| Security Technology | ARM TrustZone-M, secure key storage, tamper resistance |
| Cryptography | Hardware crypto acceleration (AES, True Random Number Generator) |
| Active Mode Current | <25 uA/MHz |
| Sleep Mode Current | <100 nA |
| Peripheral Touch Controller (PTC) | Yes |
| SERCOM Modules | Yes (configurable UART/SPI/I2C) |
| ADC | Yes |
| DAC | Yes |
| Operational Amplifier | Yes (on-chip) |
| Analog Comparator (AC) | Yes |
| Package | 24-SSOP (0.209", 5.30mm width) |
| Pin Count | 24 |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ATSAML11D14A-YU Pin Configuration
| Pin 1 | VDD — Digital power supply |
| Pin 2 | GND — Ground |
| Pin 3 | RESET — Reset input, active-low |
| Pin 4 | PA00 — GPIO / SERCOM / ADC |
| Pin 5 | PA01 — GPIO / SERCOM / ADC |
| Pin 6 | PA02 — GPIO / SERCOM / ADC |
| Pin 7 | PA03 — GPIO / SERCOM / ADC / DAC |
| Pin 8 | PA04 — GPIO / SERCOM / ADC / DAC |
| Pin 9 | PA05 — GPIO / SERCOM / ADC / OPAMP |
| Pin 10 | PA06 — GPIO / SERCOM / ADC / OPAMP |
| Pin 11 | PA07 — GPIO / SERCOM / ADC / AC |
| Pin 12 | PA08 — GPIO / SERCOM / AC |
| Pin 13 | PA09 — GPIO / SERCOM / AC |
| Pin 14 | PA10 — GPIO / SERCOM / PTC |
| Pin 15 | PA11 — GPIO / SERCOM / PTC |
| Pin 16 | PA14 — GPIO / SERCOM / PTC |
| Pin 17 | PA15 — GPIO / SERCOM / PTC |
| Pin 18 | PA16 — GPIO / SERCOM / PTC |
| Pin 19 | PA17 — GPIO / SERCOM / PTC |
| Pin 20 | PA18 — GPIO / SERCOM |
| Pin 21 | PA19 — GPIO / SERCOM |
| Pin 22 | PA22 — GPIO / SERCOM / SWDIO |
| Pin 23 | PA23 — GPIO / SERCOM / SWCLK |
| Pin 24 | VDDIO — I/O supply voltage |
Typical Applications
ATSAML11D14A-YU is suitable for 6 applications: Secure IoT Sensor Nodes, Smart Home Touch Panels, Battery-Powered Wearable Health Devices, Tamper-Resistant Industrial Controllers, Low-Power Wireless Sensor Tags, Secure Consumer Token Devices.
Secure IoT Sensor Nodes
The ATSAML11D14A-YU's ARM TrustZone-M hardware isolation and hardware AES/TRNG acceleration make it ideal for secure IoT sensor endpoints. It enables secure boot, encrypted over-the-air (OTA) firmware updates, and tamper-resistant key storage while drawing less than 25 uA/MHz active and under 100 nA in sleep. The integrated 12-bit ADC, op-amp, and analog comparator interface directly to environmental sensors (temperature, humidity, gas), eliminating external signal-chain components. TrustZone-M lets the developer isolate crypto libraries and root keys from main application code, reducing attack surface for connected home, smart-city, and industrial IoT deployments.
Recommended
Smart Home Touch Panels
With its on-chip Peripheral Touch Controller (PTC), the ATSAML11D14A-YU directly drives capacitive touch buttons, sliders, and proximity sensors without an external touch ASIC. The Cortex-M23 core at 32 MHz executes touch-scanning and lighting-control firmware with low latency, while TrustZone-M isolates the secure commissioning flow from the user-facing application. Sub-100 nA sleep current lets battery-powered wall switches run for years on a single coin cell. The 24-SSOP package keeps the BOM small enough to fit behind glass or acrylic overlays in dimmer switches, smart thermostats, and appliance control panels.
Recommended
Battery-Powered Wearable Health Devices
The ATSAML11D14A-YU's sub-25 uA/MHz active current and sub-100 nA sleep current extend battery life in wearable health and fitness devices. Its on-chip 12-bit ADC and op-amp interface directly to optical heart-rate, SpO2, and temperature sensors, while the integrated DAC generates stimulus signals for bio-impedance measurements. TrustZone-M hardware isolation protects personal health data and firmware IP, addressing HIPAA/GDPR-style privacy concerns at the silicon level. The compact 24-SSOP package fits wristbands, patches, and ring-form-factor wearables where PCB area is severely constrained.
Recommended
Tamper-Resistant Industrial Controllers
Industrial PLCs, smart meters, and access-control panels benefit from the ATSAML11D14A-YU's chip-level tamper detection and secure key storage. TrustZone-M isolates the metering/authentication code from the operator-facing HMI firmware, preventing firmware tampering that could compromise billing accuracy or physical security. The Cortex-M23 core handles real-time control loops at 32 MHz, while the peripheral touch controller, ADC, and analog comparator interface to operator panels and sensor inputs. The 24-SSOP industrial-grade package supports extended temperature operation suitable for factory-floor and outdoor cabinet installations.
Recommended
Low-Power Wireless Sensor Tags
Combined with a sub-GHz or BLE radio, the ATSAML11D14A-YU forms the secure processing core of battery-powered wireless sensor tags for logistics, asset tracking, and environmental monitoring. The Cortex-M23 core manages sensor reads, radio hand-off, and security handshake routines while staying below 25 uA/MHz active. Sleep current under 100 nA lets coin-cell tags operate for years. TrustZone-M secures the wireless authentication keys and OTA update channel against physical tampering. The 16 KB Flash and 8 KB SRAM comfortably hold a BLE stack fragment, sensor drivers, and a small secure-element interface.
Recommended
Secure Consumer Token Devices
The ATSAML11D14A-YU is well-suited to secure consumer tokens such as FIDO2 security keys, smart-card replacements, and crypto-wallets. TrustZone-M hardware isolation protects private key material from software-side extraction, and the hardware AES/TRNG block accelerates signing operations. The on-chip DAC and analog comparator support secure-element-style authentication handshakes, while the SERCOM block interfaces to NFC or USB-C PHY layers. The 24-SSOP surface-mount package enables low-profile token enclosures, and sub-100 nA sleep current preserves battery life in rarely-used credential devices.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML11D14A-YU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML11D15A-AU | ATSAML11D16A-YU | ATSAML11E14A-AU | ATSAML10D14A-MF | ATSAML10E16A-MUT | ATSAML10D16A-YU |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 24-SSOP | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same | 24-SSOP - same |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 16 KB | 32 KB | 64 KB | 16 KB | 16 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| TrustZone-M | Yes | Yes | Yes | Yes | No (SAM L10) | No (SAM L10) | No (SAM L10) |
| Hardware Crypto | Yes (AES, TRNG) | Yes | Yes | Yes | No | No | No |
| PTC Touch Controller | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- ARM TrustZone-M hardware isolation in Cortex-M23 class (vs ATSAML10D14A-MF)
- Hardware AES and True Random Number Generator (vs ATSAML10D14A-MF)
- Same 24-SSOP footprint across SAM L10/L11 families (vs ATSAML11D16A-YU)
Design Notes
The ATSAML11D14A-YU draws less than 25 uA/MHz in active mode and under 100 nA in deep sleep. Place a 1 uF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 100 nF capacitor close to VDDIO to maintain stable supply during wake-up transitions. The 24-SSOP package's exposed lead frame helps dissipate transient switching current; route a small ground pour under the IC body to improve thermal coupling to the PCB.
Keep the SWDIO (PA22) and SWCLK (PA23) traces short (< 50 mm) and length-matched to ensure reliable programming/debug at 32 MHz. Place the 32.768 kHz crystal within 5 mm of the XIN/XOUT pins if used, with a grounded guard ring around both traces. The PTC touch channels (PA10-PA17) should be routed away from switching power lines and digital clocks to prevent false touch events.
When partitioning Flash between secure and non-secure regions using TrustZone-M, reserve at least 8 KB for the secure boot and key-storage region; the ATSAML11D14A-YU's 16 KB total Flash leaves only 8 KB for non-secure application code if you allocate the maximum secure region. Per Microchip's SAM L11 family documentation, misconfigured TrustZone-M attribute tables can lock the device, so always keep the SWD debug interface accessible during development and use Microchip's TrustZone-M configuration tool to validate partitions before locking.
SERCOM peripheral lines (UART/SPI/I2C) can be reassigned to multiple GPIO pins. When running SPI at the maximum supported clock, add a 22-33 ohm series resistor near the driver pin to dampen reflections if the trace length exceeds 25 mm. The on-chip op-amp output is sensitive to capacitive loading above 20 pF; buffer it externally if driving long cables or low-impedance loads.
Compliance Information
RoHS compliant and lead-free per Microchip product page. AEC-Q100 not applicable - this is a general-purpose industrial MCU; SAM V71/S70 family parts are the automotive AEC-Q100 grade options in the Microchip portfolio.
