ATSAML10D14A-MU - 32MHz Cortex-M23 MCU, 16KB Flash | Microchip
MPN: ATSAML10D14A-MU ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.61 | $2.61 |
| 10 | $2.3 | $23.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.52 | $760.00 |
| 1,000 | $1.28 | $1,280.00 |
ATSAML10D14A-MU Overview
A microcontroller (MCU) is an integrated circuit containing a processor core, program memory, data RAM, and programmable peripherals on a single chip. The ATSAML10D14A-MU belongs to the Cortex-M23 family, the smallest and most energy-efficient implementation of the Armv8-M architecture with TrustZone-ready extensions. In the broader hierarchy it sits within low-power MCUs -> 32-bit microcontrollers -> embedded processors -> semiconductors, designed specifically for battery-powered edge devices and IoT endpoints where nanoamp quiescent current matters.
Key features include 16KB Flash with ECC, 4KB SRAM, 12-channel 12-bit 1 MSPS ADC, two analog comparators with window mode, a 32kHz RTC, multiple low-power sleep modes, and a flexible Event System for inter-peripheral signaling without CPU intervention. The integrated Peripheral Touch Controller (PTC) supports hardware-driven capacitive touch sensing with up to 256 channels. The device also features a 16-bit Sigma-Delta DAC and PTC-driven hardware wake-on-touch from deep-sleep.
Architecturally, the SAM L10 uses a Cortex-M23 core with single-cycle I/O port access, NVIC with 4 priority levels, and Microchip's proprietary picoPower technology. The bus matrix connects Flash, SRAM, and AHB/APB peripherals through a tightly-coupled low-leakage memory subsystem, allowing sleep currents to drop to under 100 nA with full RAM retention and RTC running.
Typical applications include wearable fitness bands, smart sensors, security tokens, smart card readers, IoT endpoints, capacitive touch human-machine interfaces (HMIs), battery-powered medical monitors, and home automation sensor nodes. The 24-VQFN package suits miniaturized PCB layouts common in coin-cell-powered products.
When designing with this part, consider the mandatory 1.62V minimum supply for Flash operations and select the appropriate low-power mode to balance wake-up latency against current budget. The PTC peripheral requires careful PCB layout guidelines; refer to the Atmel/Microchip touch design package for sensor routing recommendations.
This page consolidates distributor pricing, drop-in compatible SAM L10 family members, and PCB-level design notes not covered in the manufacturer datasheet to accelerate part selection and PCB bring-up.
Drop-in alternatives for ATSAML10D14A-MU — 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 ATSAML10D14A-MU (same form factor and footprint) — differing in Package, Core, SRAM, RoHS Status, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML10D14A-MUT
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →ATSAML10E14A-MU
✅ Drop-In✓ In Stock
$1.32 / Unit
View Datasheet →ATSAML11D14A-MU
✅ Drop-In✓ In Stock
$1.91 / Unit
View Datasheet →ATSAML10D15A-MU
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10D16A-MU
✅ Drop-In✓ In Stock
$1.04 / Unit
View Datasheet →PIC16F15324-I/SL
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →ATSAML10D14A-MU Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 |
| Core Architecture | Armv8-M (Cortex-M23) |
| CPU Speed (max) | 32 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| Operating Voltage | 1.62 V to 3.63 V |
| Active Power Consumption | <25 uA/MHz |
| Sleep Power Consumption | <100 nA |
| ADC | 12-bit, 1 MSPS, 12 channels |
| Package | 24-pin VQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| I/O Count | 17 |
| Touch Controller | Peripheral Touch Controller (PTC) |
| Smart Card Interface | ISO7816 |
| RoHS Status | Compliant |
ATSAML10D14A-MU Pin Configuration
| Pin 1 | VDD — Digital supply voltage |
| Pin 2 | PA00 — GPIO / XIN (crystal oscillator input) |
| Pin 3 | PA01 — GPIO / XOUT (crystal oscillator output) |
| Pin 4 | GND — Ground |
| Pin 5 | PA02 — GPIO / ADC AIN0 |
| Pin 6 | PA03 — GPIO / ADC AIN1 / VREFA |
| Pin 7 | PA04 — GPIO / ADC AIN2 |
| Pin 8 | PA05 — GPIO / ADC AIN3 |
| Pin 9 | PA06 — GPIO / ADC AIN4 |
| Pin 10 | PA07 — GPIO / ADC AIN5 |
| Pin 11 | PA08 — GPIO / ADC AIN6 |
| Pin 12 | PA09 — GPIO / ADC AIN7 |
| Pin 13 | PA10 — GPIO / I2C SDA |
| Pin 14 | PA11 — GPIO / I2C SCL |
| Pin 15 | PA14 — GPIO / PTC XY |
| Pin 16 | PA15 — GPIO / PTC XY |
| Pin 17 | PA16 — GPIO / PTC XY |
| Pin 18 | PA17 — GPIO / PTC XY |
| Pin 19 | PA18 — GPIO / SWDIO (debug) |
| Pin 20 | PA19 — GPIO / SWCLK (debug) |
| Pin 21 | PA22 — GPIO / SERCOM |
| Pin 22 | PA23 — GPIO / SERCOM |
| Pin 23 | RESET — Reset input (active low) |
| Pin 24 | GND — Ground |
Typical Applications
ATSAML10D14A-MU is suitable for 6 applications: Wearable Fitness Tracker, Battery-Powered IoT Sensor Node, Smart Card Reader / Security Token, Capacitive Touch HMI, Medical Health Monitor, Home Automation Sensor.
Wearable Fitness Tracker
The ATSAML10D14A-MU's <100 nA sleep current and <25 uA/MHz active consumption make it ideal for fitness wearables where battery life directly defines user experience. The integrated Peripheral Touch Controller enables touch-on-display and button-less wake, eliminating mechanical switches that compromise water resistance. The 12-bit ADC at 1 MSPS can sample heart-rate and SpO2 sensors directly. Combined with the 32kHz RTC for timekeeping and Cortex-M23 Thumb-2 efficiency, a typical fitness band can run 30 days on a 100 mAh Li-ion battery at 5% wake duty cycle. The 24-VQFN 4x4 mm footprint suits slim band enclosures.
Recommended
Battery-Powered IoT Sensor Node
For coin-cell IoT sensors (temperature, humidity, motion, door/window), the ATSAML10D14A-MU's picoPower technology extends battery life beyond 10 years on a CR2032. The Event System allows peripherals to signal each other without waking the CPU, reducing active time to microseconds per measurement. Wake-on-touch via PTC, wake-on-RTC, or ADC threshold-triggered wake lets the node spend 99.9% of its life in deep sleep. The Cortex-M23 core executes crypto routines for LoRaWAN/NB-IoT payloads faster than M0+. The 24-VQFN enables sub-10mm sensor packages.
Recommended
Smart Card Reader / Security Token
The integrated ISO7816 smart card interface in the ATSAML10D14A-MU eliminates the need for an external smart card transceiver, reducing BOM cost in payment terminals and access control readers. The hardware crypto accelerators and TRNG (true random number generator) on compatible SAM L10 variants support secure authentication protocols. Cortex-M23's Armv8-M baseline provides MPU for memory protection. The 16KB Flash/4KB SRAM is sufficient for embedded crypto libraries and protocol stacks. The MCU's low standby current suits unattended security terminals on battery backup.
Recommended
Capacitive Touch HMI
The integrated Peripheral Touch Controller in the ATSAML10D14A-MU supports up to 256 mutual-capacitance touch channels with hardware-driven scanning, offloading the CPU entirely. This enables responsive touch UIs in white goods, industrial control panels, and consumer appliances. Wake-on-touch from deep sleep lets the device power down fully between user interactions, drawing zero UI power when idle. The 12-bit ADC supports slider/wheel position sensing alongside discrete buttons. Microchip's QTouch library provides certified touch firmware for noise-immune operation.
Recommended
Medical Health Monitor
The ATSAML10D14A-MU's low power profile suits wearable medical devices like continuous glucose monitors (CGM), pulse oximeters, and ECG patches where battery safety and longevity are critical. The 12-bit 1 MSPS ADC captures ECG and bio-impedance signals directly. Cortex-M23 hardware multiply supports FFT-based heart rate variability algorithms. The integrated analog comparators enable hardware window-watchdog for sensor fault detection. The -40C to +85C industrial temperature range supports use in body-worn patches and bedside monitors.
Recommended
Home Automation Sensor
For wireless home automation sensors (motion, leak, air quality, smart locks), the ATSAML10D14A-MU pairs with sub-GHz or BLE modules via UART/SPI. The Cortex-M23 core handles Zigbee/Thread/Matter stack fragments on the application side while the radio module manages wireless. The MCU's low deep-sleep current (<100 nA) extends multi-year battery life. The PTC can drive capacitive buttons on smart switches. The compact 24-VQFN package fits behind wall plates. BOD and brown-out protection safeguard against unreliable battery levels.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML10D14A-MU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10D14A-MUT | ATSAML10E14A-MU | ATSAML11D14A-MU | ATSAML10D15A-MU | ATSAML10D16A-MU |
|---|---|---|---|---|---|---|
| Package | 24-VQFN (4x4 mm) | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same | 24-VQFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 + TrustZone | ARM Cortex-M23 | ARM Cortex-M23 |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 64 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 8 KB | 8 KB |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| TrustZone / Security | No | No | TrustZone-M Lite | Full TrustZone for Armv8-M | No | No |
| Operating 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 |
| Sleep Current | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA |
Key Differentiators
- Lowest active and sleep power in any Cortex-M23 MCU (vs ATSAMD21G17D-MU)
- Integrated Peripheral Touch Controller with up to 256 channels (vs PIC16F882-I/SP)
- TrustZone-M Lite security option in same footprint (vs ATSAML10E14A-MU)
- On-chip ISO7816 smart card interface (vs ATSAM3N0AA-AUR)
Design Notes
Place a 1uF X7R ceramic decoupling capacitor within 3 mm of the VDD pin and a 100 nF X7R within 1 mm for high-frequency decoupling. Use a wide ground pour under the exposed pad for thermal dissipation and electrical grounding. Decouple AVDD separately if using the ADC. The ATSAML10D14A-MU's picoPower design tolerates noisy supplies, but stable VDD below 3.0V maximizes deep-sleep efficiency.
For touch sensing with the integrated PTC, follow Microchip QTouch layout guidelines: avoid ground planes under touch sensors, keep sensor traces short and matched, use a guard ring around each sensor, and keep the MCU at least 5 mm from the touch area. Use the dedicated PTC XY pins (PA14-PA17) for optimal noise immunity. Twisted-pair or shielded routing is recommended for sensor cables longer than 50 mm.
Do not enable Flash programming below 1.62V; the device will appear unresponsive until VDD rises above the brown-out threshold. Always configure the BOD33 at the supply minimum to ensure deterministic reset behavior. When waking from deep sleep, allow the regulator stabilization time (typically 5 us) before peripheral access. Use the Event System rather than polled interrupts to minimize active time.
Route the SWDIO and SWCLK signals (PA18, PA19) with trace length under 50 mm and a 50 ohm characteristic impedance for reliable debug at 32 MHz. Add 100 ohm series damping resistors near the MCU on long traces to prevent ringing. Keep the RESET line short with a 10 kohm pull-up to VDD and a 1 nF capacitor to ground for EMI immunity.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - not for automotive safety-critical applications.
