ATSAML10E14A-AF - 32MHz ARM Cortex-M23 16KB Flash MCU | Microchip
MPN: ATSAML10E14A-AF ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $2.98 | $29.80 |
| 100 | $2.45 | $245.00 |
| 500 | $2.12 | $1,060.00 |
| 1,000 | $1.86 | $1,860.00 |
ATSAML10E14A-AF Overview
What is a Cortex-M23 microcontroller? The ARM Cortex-M23 is a 32-bit microcontroller core designed by Arm as the smallest and most energy-efficient member of the Cortex-M family. It sits below the Cortex-M0+ and M4 in the Arm Cortex hierarchy, targeting ultra-low-power applications such as IoT sensor nodes, wearables, and smart metering. Cortex-M23 introduces TrustZone-M baseline security extensions (optional in M23, used in the related SAM L11 family), a single-cycle I/O interface, and deterministic interrupt latency. Compared to legacy 8-bit MCUs, Cortex-M23 devices deliver 2-3x higher DMIPS per MHz while remaining in the sub-50 µA/MHz active-power envelope.
The ATSAML10E14A-AF integrates an enhanced Peripheral Touch Controller (PTC) for capacitive touch sensing, a 12-bit ADC, multiple SERCOM (serial communication) interfaces, an ISO7816 smart-card interface, and an Event System for inter-peripheral signaling without CPU intervention. The 16KB Flash and 4KB SRAM footprint targets cost-sensitive applications with modest firmware size. Operating voltage spans 1.62V to 3.63V across an industrial temperature range of -40°C to +125°C, with AEC-Q100 Grade 1 qualification available for automotive use.
Typical applications include battery-powered IoT sensors, smart-card and NFC front-ends, capacitive touch user interfaces, home automation, medical wearables, and low-power wireless sensor nodes. The PTC supports both self-capacitance and mutual-capacitance touch, enabling button, slider, and wheel implementations directly in firmware.
Design consideration: For lowest sleep-mode power, configure the MCU in STANDBY sleep mode with RTC running from the 32.768 kHz crystal and all unused peripherals gated off; this achieves the datasheet's <100 nA sleep figure. Brown-out detector (BOD) thresholds must be configured to match the minimum supply voltage of downstream rails.
This page synthesizes distributor pricing, drop-in same-package alternatives, design notes, and selection guidance that go beyond the manufacturer datasheet to help engineers evaluate, source, and design in the ATSAML10E14A-AF with confidence.
Drop-in alternatives for ATSAML10E14A-AF — 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 ATSAML10E14A-AF (same form factor and footprint) — differing in Core Architecture, ADC, Package, RoHS Status, Active Current.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML10E15A-AF
✅ Drop-In✓ In Stock
$1.15 / Unit
View Datasheet →ATSAML10E16A-AF
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10E14A-AFT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAML10E14A-AF Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M23 |
| Bit Width | 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 16 KB |
| RAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 µA/MHz |
| Sleep Mode Current | < 100 nA |
| Operating Temperature Range | -40 °C to +125 °C |
| ADC | 12-bit |
| Peripheral Touch Controller (PTC) | Yes (self- and mutual-capacitance) |
| Communication Interfaces | SERCOM, I²C, SPI, UART, ISO7816 |
| Package | 32-pin TQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Temperature Grade | Automotive (per partstack listing) |
| RoHS Status | Compliant |
ATSAML10E14A-AF Pin Configuration
| Pin 1 | PA00 — GPIO / SERCOM pad |
| Pin 2 | PA01 — GPIO / SERCOM pad |
| Pin 3 | PA02 — GPIO / ADC input |
| Pin 4 | PA03 — GPIO / ADC input |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Core/IO power supply |
| Pin 7 | PA04 — GPIO / SERCOM pad |
| Pin 8 | PA05 — GPIO / SERCOM pad |
| Pin 9 | PA06 — GPIO / SERCOM pad |
| Pin 10 | PA07 — GPIO / SERCOM pad |
| Pin 11 | PA08 — GPIO / SERCOM pad |
| Pin 12 | PA09 — GPIO / SERCOM pad |
| Pin 13 | PA10 — GPIO / SERCOM pad |
| Pin 14 | PA11 — GPIO / SERCOM pad |
| Pin 15 | GND — Ground |
| Pin 16 | VDD — Core/IO power supply |
| Pin 17 | PA14 — GPIO / SERCOM pad |
| Pin 18 | PA15 — GPIO / SERCOM pad |
| Pin 19 | PA16 — GPIO / SERCOM pad |
| Pin 20 | PA17 — GPIO / SERCOM pad |
| Pin 21 | PA18 — GPIO / SERCOM pad |
| Pin 22 | PA19 — GPIO / SERCOM pad |
| Pin 23 | PA20 — GPIO / SERCOM pad |
| Pin 24 | PA21 — GPIO / SERCOM pad |
| Pin 25 | PA22 — GPIO / SERCOM pad |
| Pin 26 | PA23 — GPIO / SERCOM pad |
| Pin 27 | PA24 — GPIO / SERCOM pad |
| Pin 28 | PA25 — GPIO / SERCOM pad |
| Pin 29 | RESET — Reset input (active-low) |
| Pin 30 | SWDIO — Serial Wire Debug data |
| Pin 31 | SWCLK — Serial Wire Debug clock |
| Pin 32 | GND — Ground |
Typical Applications
ATSAML10E14A-AF is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, Capacitive Touch User Interfaces, Smart Card and NFC Front-Ends, Medical Wearables and Health Monitors, Home Automation and Smart Home Devices, Industrial Sensor and Monitoring Systems, Automotive Body Electronics and Sensors.
Battery-Powered IoT Sensor Nodes
The ATSAML10E14A-AF's <100 nA sleep current and <25 µA/MHz active power make it ideal for battery-powered IoT sensor nodes that must operate for years on a single coin cell or AA battery. With 16 KB Flash and 4 KB SRAM, the part can host lightweight sensor-fusion firmware, BLE beacon stacks, or LoRaWAN MAC layers. Place the MCU between the battery and the sensor front-end with the RTC running from the 32.768 kHz crystal in STANDBY sleep mode to achieve multi-year battery life. The Event System wakes the CPU only on sensor threshold crossings, avoiding continuous polling current.
Recommended
Capacitive Touch User Interfaces
The integrated Peripheral Touch Controller (PTC) supports both self-capacitance and mutual-capacitance sensing, enabling robust buttons, sliders, wheels, and proximity sensors without external touch ICs. The ATSAML10E14A-AF runs Microchip's QTouch Modular Library, which provides proven firmware for water-tolerant and noise-immune touch implementations. Place the MCU directly driving the touch sensor PCB pattern, with the 12-bit ADC monitoring additional analog inputs. With <100 nA sleep current, the device can wake on a touch interrupt from STANDBY, then process the gesture before returning to sleep.
Recommended
Smart Card and NFC Front-Ends
The ISO7816 smart-card interface on the ATSAML10E14A-AF simplifies integration with secure contact-based smart cards and identity modules. Combined with the 32 MHz Cortex-M23 performance and SERCOM peripherals, the part can serve as a compact terminal-side MCU for payment terminals, e-passport readers, and access control panels. Use the SERCOM in UART mode to drive the ISO7816 line, with the on-chip PTC handling keypad inputs. The 1.62 V to 3.63 V supply range supports direct 3 V smart-card rails.
Recommended
Medical Wearables and Health Monitors
The ATSAML10E14A-AF's ultra-low sleep current and integrated 12-bit ADC support wearable health monitors such as pulse oximeters, heart-rate patches, and continuous glucose monitors. Run the MCU in STANDBY with RTC sampling at 1 Hz; wake on RTC match to trigger an ADC conversion, then return to sleep. The 16 KB Flash accommodates lightweight BLE sensor-firmware stacks, while 4 KB SRAM buffers raw ADC samples. Per Microchip's datasheet, the AEC-Q100 Grade 1 qualification enables automotive and medical-device designs requiring rigorous reliability.
Recommended
Home Automation and Smart Home Devices
The ATSAML10E14A-AF is well-suited to battery-powered smart-home devices such as door/window sensors, occupancy detectors, and remote-control keypads. The Cortex-M23 core handles Zigbee or Thread stack fragments when paired with a transceiver module, while the PTC supports touch button wake-up from a sealed front panel. Use the 1.62 V minimum supply to enable direct coin-cell operation, and leverage the Event System to wake the CPU only on actionable interrupts, preserving years of battery life on a single CR2032.
Recommended
Industrial Sensor and Monitoring Systems
The ATSAML10E14A-AF's -40 °C to +125 °C industrial temperature range and ISO7816-capable SERCOM interfaces enable deployment in industrial sensor hubs, gas detectors, and asset trackers. Pair the MCU with a 4-20 mA current-loop sensor or Modbus RTU slave interface for legacy fieldbus systems. The 32 MHz Cortex-M23 core runs control loops while the integrated 12-bit ADC samples analog sensor channels; <100 nA sleep current extends battery life in field-deployed, hard-to-access installations. The 32-pin TQFP package is hand-solderable for prototype and low-volume production runs.
Recommended
Automotive Body Electronics and Sensors
The AEC-Q100 Grade 1 qualification of the ATSAML10E14A-AF supports automotive body-electronics applications such as interior lighting controls, seat-occupancy sensors, and tire-pressure monitoring system (TPMS) sensor transmitters. The ultra-low sleep current extends battery life in TPMS sensors, where the same coin cell must last 7-10 years. Run the MCU in STANDBY with the 32.768 kHz crystal driving periodic wake events; use the integrated PTC for touch-based interior controls and the 12-bit ADC for analog sensor inputs from occupant-detection sensors.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML10E14A-AF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10E15A-AF | ATSAML10E16A-AF | ATSAML10E14A-AFT | ATSAML10D14A-MF |
|---|---|---|---|---|---|
| Package | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) | 32-pin TQFP (7x7 mm) | 32-pin QFN (5x5 mm) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 16 KB | 32 KB (+100%) | 32 KB (+100%) | 16 KB (identical) | 16 KB (identical) |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Active Current | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz | <25 µA/MHz |
| Sleep Current | <100 nA | <100 nA | <100 nA | <100 nA | <100 nA |
| Peripheral Touch Controller | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Industry's lowest-power Cortex-M23 MCU (vs STM32L0 Cortex-M0+ family)
- Same-package upgrade path to 32 KB Flash (vs ATSAML10E14A-AF vs ATSAML10E16A-AF)
- Integrated Peripheral Touch Controller on-chip (vs External AT42QT1010 touch IC)
Design Notes
Configure the MCU in STANDBY sleep mode with the 32.768 kHz external crystal driving the RTC to achieve the datasheet's <100 nA sleep current. Disable all unused peripherals via the Clock Mask register before entering sleep. Use the Event System to wake the CPU on GPIO, RTC compare, or ADC threshold events, avoiding continuous polling. Brown-Out Detector (BOD) should be set to 2.97 V threshold when running from a 3.3 V regulated rail to ensure clean resets during supply dips.
Place the ATSAML10E14A-AF on the top side with a continuous ground plane beneath for thermal dissipation and signal-integrity. Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of the VDD pin and a bulk 4.7 µF ceramic on the supply rail. For 32.768 kHz crystal placement, keep traces short (<5 mm) and symmetric, with the crystal housing connected to ground via a guard trace to reduce EMI coupling to the touch sensor electrodes.
Do not enable the ADC without first configuring the reference voltage source; floating reference inputs cause erratic ADC readings. Avoid routing the SWD lines (SWDIO, SWCLK) near noisy switching traces; route them short and direct to the debug header. When using the Peripheral Touch Controller, ensure sensor electrodes are guarded by a ground ring and that unused PTC channels are configured as GPIO to prevent floating inputs. Do not exceed 3.63 V on any I/O pin, even momentarily, or the part will latch up.
For capacitive touch applications, route the PTC sensor traces on the top layer with no vias, keep them under 100 mm in length, and surround them with a hatched ground pour at least 5 mm wide to reject interference. The 32-pin TQFP package has a 0.8 mm pitch, requiring 0.15 mm/0.20 mm trace-and-space rules at minimum. Place the touch electrodes on the opposite side of the PCB from noisy components (DC-DC converters, LED drivers) and use a ground plane to shield them.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 Grade 1 qualified per partstack listing (temperature grade automotive). Halogen-free status not stated in verified web data.
