ATSAML10E15A-AU - 32KB Flash ARM Cortex-M23 MCU | Microchip
MPN: ATSAML10E15A-AU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.14 | $3.14 |
| 10 | $2.95 | $29.50 |
| 100 | $2.71 | $271.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.18 | $2,180.00 |
| 3,000 | $1.92 | $5,760.00 |
ATSAML10E15A-AU Overview
An ARM Cortex-M23 MCU is a 32-bit microcontroller built on the Armv8-M baseline architecture. It belongs to the broader taxonomy microcontroller unit (MCU) -> embedded processor -> semiconductor. The Cortex-M23 brings hardware-level integer divide, TrustZone-ready isolation (on the SAM L11 sibling), and deterministic interrupt latency suited for always-on battery-powered applications where every microamp matters.
Key features include a peripheral touch controller (PTC) supporting buttons, sliders, and proximity sensing without external components, a 12-bit 1 Msps ADC, multiple SERCOM interfaces for UART/SPI/I2C configuration, an ISO7816 smart card interface, an event system for inter-peripheral signaling without CPU overhead, and Sleepwalking I/O. The 32KB Flash variant (the "E15" code) is the mid-density option within the SAM L10 family, sitting between the smaller E14 (16KB) and larger E16 (64KB) parts.
Architecturally, the SAM L10 uses a Cortex-M23 core at up to 32MHz with single-cycle I/O access, a tightly coupled DMA, and Microchip's proprietary ultra-low-power picoPower technology with multiple sleep modes (Sleep, Standby, Backup, and Off). The BOD12 voltage detector and brown-out reset are integrated for industrial-grade supply supervision. The part comes in automotive and industrial grades; the -AU suffix denotes the 32-pin TQFP, 85C industrial grade, Tray packaging variant.
Typical applications include IoT sensor nodes, secure-access control panels with smart-card readers, low-power wearables, home automation touch keypads, industrial HMI, and battery-powered medical sensors. The combination of Cortex-M23 vector compute efficiency and sub-100nA sleep current makes the SAM L10 a frequent choice for Energy Harvesting designs.
When designing with the SAM L10, select an external LDO or buck regulator with low quiescent current, place decoupling capacitors within 2mm of each supply pin, and route the PTC sense lines as guarded tracks to maintain touch sensitivity. The internal FRO and DFLL can replace an external crystal for many designs, reducing BOM cost and standby current. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for ATSAML10E15A-AU β 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 ATSAML10E15A-AU (same form factor and footprint) β differing in Operating Temperature, ADC, Package, Core Architecture, Sleep Current.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAML10E15A-AUT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML10E15A-AFT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML10E15A-AU
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βATSAML10D15A-MFT
β Drop-Inπ Reference alternative (not in catalog)
ATSAML10D14A-MF
β Drop-Inβ In Stock
$2.18 / Unit
View Datasheet βATSAML10D16A-MFT
β Drop-Inβ In Stock
$1.7 / Unit
View Datasheet βATSAML10E15A-AU Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M23 (Armv8-M Baseline) |
| Bit Width | 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Supply Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | < 25 uA/MHz |
| Sleep Mode Current | < 100 nA |
| Package | 32-TQFP (7x7 mm) |
| Pin Count | 32 |
| Operating Temperature | -40C to +85C (industrial) |
| ADC | 12-bit, up to 1 Msps |
| Peripheral Touch Controller | Yes (hardware PTC) |
| ISO7816 Smart Card Interface | Yes |
| SERCOM Modules | Configurable UART/SPI/I2C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Yes (Green) |
ATSAML10E15A-AU Pin Configuration
| Pin 1 | VDDIO β Digital I/O supply voltage |
| Pin 2 | PA02 β GPIO / ADC AIN0 |
| Pin 3 | PA03 β GPIO / ADC AIN1 / VREFA |
| Pin 4 | GND β Ground |
| Pin 5 | PA04 β GPIO / ADC AIN2 |
| Pin 6 | PA05 β GPIO / ADC AIN3 |
| Pin 7 | PA06 β GPIO / ADC AIN4 |
| Pin 8 | RESETn β Reset input (active low) |
| Pin 9 | PA07 β GPIO / SERCOM0 PAD0 |
| Pin 10 | PA08 β GPIO / SERCOM0 PAD1 |
| Pin 11 | VDDIN β Main supply input |
| Pin 12 | PA09 β GPIO / SERCOM0 PAD2 |
| Pin 13 | PA10 β GPIO / SERCOM0 PAD3 |
| Pin 14 | PA11 β GPIO / SERCOM1 PAD0 |
| Pin 15 | PA14 β GPIO / PTC Y0 |
| Pin 16 | PA15 β GPIO / PTC X0 |
| Pin 17 | PA16 β GPIO / PTC X1 |
| Pin 18 | PA17 β GPIO / PTC X2 / SERCOM1 PAD3 |
| Pin 19 | PA18 β GPIO / PTC X3 / SERCOM2 PAD0 |
| Pin 20 | PA19 β GPIO / PTC X4 / SERCOM2 PAD1 |
| Pin 21 | PA22 β GPIO / SERCOM3 PAD0 |
| Pin 22 | PA23 β GPIO / SERCOM3 PAD1 |
| Pin 23 | PA24 β GPIO / SERCOM3 PAD2 |
| Pin 24 | PA25 β GPIO / SERCOM3 PAD3 |
| Pin 25 | PB03 β GPIO / ADC AIN13 |
| Pin 26 | PB04 β GPIO / ADC AIN12 |
| Pin 27 | PB05 β GPIO / ADC AIN11 |
| Pin 28 | PB06 β GPIO / ADC AIN10 / SERCOM4 PAD0 |
| Pin 29 | PB07 β GPIO / SERCOM4 PAD1 |
| Pin 30 | PB08 β GPIO / SERCOM4 PAD2 |
| Pin 31 | PB09 β GPIO / SERCOM4 PAD3 |
| Pin 32 | GND β Ground (bottom thermal pad internally connected) |
Typical Applications
ATSAML10E15A-AU is suitable for 6 applications: IoT Sensor Node with Sub-100nA Sleep, Battery-Powered Wearable Touch Keypad, Smart Card Access Control Panel, Industrial HMI with Touch and Low Power, Portable Medical Sensor, Home Automation Smart Sensor.
IoT Sensor Node with Sub-100nA Sleep
The ATSAML10E15A-AU's <25 uA/MHz active and <100 nA sleep consumption enables multi-year battery life on coin cells or energy harvesters for wireless sensor nodes. The Cortex-M23 core executes sensor fusion and BLE provisioning in active mode, then drops to Backup mode with RTC wakeup while the radio sleeps. The integrated ADC samples analog sensors directly, eliminating an external MCU. The 32KB Flash accommodates LoRaWAN or Zigbee stack libraries while 8KB SRAM holds real-time sensor buffers.
Recommended
Battery-Powered Wearable Touch Keypad
The hardware Peripheral Touch Controller (PTC) in the ATSAML10E15A-AU scans up to 32 buttons or a slider without external components, enabling waterproof capacitive touch panels that wake only on touch. Combined with <100 nA sleep current, a wearable wristband or smart-watch sub-display can idle for months between charges. The SERCOM modules drive SPI OLED or I2C displays, and the 12-bit ADC monitors battery voltage through a high-impedance divider.
Recommended
Smart Card Access Control Panel
The integrated ISO7816 smart-card interface makes the ATSAML10E15A-AU a direct fit for secure door readers and payment terminals. The Cortex-M23 baseline core handles card ATR parsing and AES-128 encryption, while the SAM L10 family provides tamper-detection GPIO and RTC. With <100 nA sleep current, the reader idles on standby for a year on AA batteries or runs continuously from PoE. The 32KB Flash holds card-emulation firmware with headroom for OTA updates.
Recommended
Industrial HMI with Touch and Low Power
The ATSAML10E15A-AU serves industrial Human-Machine Interfaces requiring both capacitive touch and deterministic serial communication. The Event System routes timer-triggered ADC samples to DMA without CPU intervention, freeing the M23 core for protocol handling. BOD12 and brown-out reset ensure reliable operation in factories with noisy 24V buses stepped down to 3.3V. The -AU industrial temperature grade covers -40C to +85C factory enclosures.
Recommended
Portable Medical Sensor
For FDA Class II portable medical sensors such as pulse oximeters, single-lead ECG patches, or continuous glucose monitors, the ATSAML10E15A-AU's picoPower modes extend battery life beyond 30 days on a single CR2032. The 12-bit 1 Msps ADC captures photoplethysmography waveforms at clinical fidelity, while SERCOM SPI interfaces with Bluetooth Low Energy modules. Hardware PTC enables touch-free patient interaction without mechanical buttons.
Recommended
Home Automation Smart Sensor
In smart-home multi-sensor units combining motion, temperature, humidity, and ambient light, the ATSAML10E15A-AU aggregates readings from low-power analog front-ends, applies sleepwalking I/O to wake only on threshold breach, and pushes data over Zigbee or Thread. Its Event System couples the ADC to DMA and SERCOM without CPU load, while the 32KB Flash accommodates Matter or HomeKit Matter-over-Thread stack fragments. The 32-TQFP footprint supports compact 25mm-diameter sensor puck designs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML10E15A-AU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML10E15A-AUT | ATSAML10E15A-AFT | ATSAML10D15A-MFT | ATSAML10D14A-MF | ATSAML10D16A-MFT |
|---|---|---|---|---|---|---|
| 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 | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M23 | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 32 MHz | 32 MHz | 32 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 4 KB | 16 KB |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C | -40C to +85C | -40C to +125C |
| Supply Voltage Range | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
Key Differentiators
- Lowest-power Cortex-M23 MCU in its class with sub-100nA sleep (vs ATSAML10D15A-MFT (Cortex-M0+ 32KB Flash))
- Hardware Peripheral Touch Controller without external components (vs ATSAML11E15A-MFT (TrustZone variant))
- Integrated ISO7816 smart-card interface (vs ATSAMDA1J16B-MBT (SAM DA1 family))
- 1.62 V to 3.63 V wide supply range (vs ATSAML10D14A-MF (16KB Flash variant))
Design Notes
Estimated: at 32MHz CoreMark active mode with all peripherals off, the SAM L10 draws approximately 25 uA/MHz x 32 MHz = 800 uA from a 3.3V supply. In Backup mode with RTC running, supply current drops below 100 nA. For battery-life calculation on a 250 mAh CR2032, expect approximately 250,000 hours (~28 years) of pure standby, but ~50-100 hours of continuous 32MHz active compute. To maximize runtime, gate SERCOM activity using the Event System so peripherals wake the core only on threshold triggers.
Place a 100 nF X7R decoupling capacitor within 2 mm of each VDDIN/VDDIO pin, and a bulk 4.7 uF tantalum or ceramic within 5 mm. Route the SWDIO and SWCLK signals as a matched-length pair (within 1 mm) to a 10-pin Cortex Debug header; add 100 ohm series damping resistors for EMI-sensitive designs. The bottom thermal pad on TQFP-32 is internally connected to GND - solder it to a copper pour for mechanical reliability and improved thermal dissipation, even though the SAM L10 power dissipation is modest.
Peripheral Touch Controller (PTC) sense lines must be guarded by GND traces to prevent crosstalk. Maintain a 0.2 mm air gap between X and Y electrodes and 0.5 mm to adjacent signal traces; route PTC lines at minimum 0.15 mm width. For PCB overlay selection, use 1 mm polycarbonate or glass with adhesive thickness below 0.3 mm; thicker overlays reduce sensitivity and may require PTC gain recalibration. Refer to Microchip AN2599 for the recommended touch sensor layout patterns.
Do not leave the RESETn pin floating - tie it to VDDIO through a 10 kohm pull-up with a 100 nF cap to GND for noise immunity. Avoid using internal FRO at temperatures outside -40C to +85C without enabling the closed-loop DFLL48M reference; the FRO alone drifts more than 1% across temperature. When migrating from ATSAML10D1x to ATSAML10E1x, note that the Cortex-M23 core requires ARMv8-M instruction syntax and an updated CMSIS pack - existing Cortex-M0+ binary firmware will not run.
Compliance Information
Per Microchip product page: Green lead-free, RoHS/REACH compliant. AEC-Q100 not qualified - choose ATSAML10E15A-AFT (125C) or an automotive-grade L10 variant if required.
