ATSAML22N17A-CFUT - ARM Cortex-M0+ 32MHz 128KB MCU | Microchip
MPN: ATSAML22N17A-CFUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.18 | $318.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.55 | $2,550.00 |
| 3,000 | $2.18 | $6,540.00 |
ATSAML22N17A-CFUT Overview
An ARM Cortex-M0+ microcontroller is a 32-bit reduced-instruction-set core built around the Thumb-2 instruction set and a single-cycle IO subsystem; the M0+ specifically adds a single-cycle GPIO block and a vectored interrupt controller for deterministic real-time response. Microcontrollers sit within the embedded-computing hierarchy of semiconductor devices (MCU -> microcontroller -> embedded processor -> semiconductor), and ultra-low-power variants such as the SAM L22 family specifically target always-on battery applications where duty-cycled sleep currents dominate the energy budget.
Key features include a 12-bit ADC, 16-bit timers, SERCOM (configurable serial communication) peripherals, a USB 2.0 Full-Speed device/host interface, an on-chip temperature sensor, and integrated touch-support through the Peripheral Touch Controller. The SAM L22 family is rated for an industrial temperature range of -40 °C to +85 °C in the CFUT UFBGA-100 package and supports up to 256 KB Flash and 32 KB SRAM across its variants, with the N17A die providing 128 KB Flash plus 16 KB SRAM at the optimized ultra-low-power operating point.
Architecturally, the device separates active and sleep power domains, allowing the CPU and most peripherals to power down while the RTC, WDT, and backup SRAM remain active. The integrated Power Manager with brown-out detector and on-chip voltage regulator allows direct battery connection from 1.6 V to 3.6 V without external regulation. Hardware cryptography is not integrated on this die; secure-boot and crypto functions require software implementation or an external companion IC.
Typical applications include battery-powered IoT sensor nodes, wearable health monitors, industrial HVAC and metering edge nodes, consumer remote controls, and low-power wireless sensor hubs. Designers choose this part when wake-on-event cycle efficiency is more important than raw CPU throughput. Consider 32 MHz versus the lower-power 8 MHz sleep-clock modes for thermal-budget or energy-harvesting designs.
This page synthesizes distributor pricing, drop-in SAM L22N family alternatives, and practical low-power design notes not found on a single distributor listing.
Drop-in alternatives for ATSAML22N17A-CFUT — 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 ATSAML22N17A-CFUT (same form factor and footprint) — differing in ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML22N16A-CFUT
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.65 / Unit
View Datasheet →ATSAML22N17A-CFUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Clock | 32 MHz |
| Program Memory (Flash) | 128 KB (128K x 8) |
| SRAM | 16 KB |
| Operating Voltage Range | 1.6 V to 3.6 V |
| Active Current (CoreMark) | 39 µA/MHz |
| Ultra-Low-Power Backup Mode | 490 nA with RTC |
| ADC | 12-bit |
| Timers | 16-bit |
| Communication Interfaces | SERCOM (configurable UART/SPI/I2C) |
| USB | USB 2.0 Full-Speed Device/Host |
| Operating Temperature | -40 °C to +85 °C |
| Package | 100-ball UFBGA (6x6 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Peripheral Touch Controller | Yes (integrated) |
ATSAML22N17A-CFUT 100-ball ufbga (6x6 mm) Pin Configuration Guide
Pin configuration for ATSAML22N17A-CFUT (100-ball ufbga (6x6 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAML22N17A-CFUT.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAML22N17A-CFUT is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Industrial HVAC Edge Nodes, Smart Metering Endpoints, Consumer Remote Controls, Low-Power Wireless Sensor Hubs.
Battery-Powered IoT Sensor Nodes
The ATSAML22N17A-CFUT is well-matched to IoT sensor nodes because it consumes only 39 µA/MHz active and drops to 490 nA in backup mode with RTC, enabling multi-year battery life on a single coin cell. Its Cortex-M0+ core runs at 32 MHz which is sufficient for sensor conditioning, periodic ADC sampling, and a lightweight wireless stack such as LoRaWAN or sub-GHz proprietary. The integrated 12-bit ADC samples thermistor, battery voltage, and environmental sensors without an external converter, reducing BoM cost and PCB area.
Recommended
Wearable Health Monitors
Wearables such as fitness bands, smart patches, and continuous-glucose monitors benefit from the ATSAML22N17A-CFUT's 490 nA backup current and integrated Peripheral Touch Controller, which removes the need for a separate touch IC. The 100-ball UFBGA fits within a 6x6 mm footprint suitable for thin wrist-form-factor enclosures. Engineers can run BLE beacon duty cycles while keeping average current under 200 µA, enabling week-long battery life between charges.
Recommended
Industrial HVAC Edge Nodes
Industrial HVAC and building-automation edge nodes use the ATSAML22N17A-CFUT because of its -40 °C to +85 °C industrial temperature rating and 1.6 V to 3.6 V supply range that accepts unregulated 24 V stepped down via a small buck converter. The 12-bit ADC reads thermistor inputs and 4-20 mA loop signals, while the SERCOM peripherals drive RS-485 transceivers for BACnet or Modbus fieldbus connectivity. The 128 KB Flash accommodates full RTOS plus fieldbus stacks.
Recommended
Smart Metering Endpoints
Smart metering endpoints such as gas, water, and heat meters leverage the ATSAML22N17A-CFUT's ultra-low-power backup mode to support 10-15 year battery life on a single D-cell. The 12-bit ADC captures pulse-output meter sensors, and the integrated RTC provides accurate timestamping for time-of-use billing without an external RTC chip. USB Full-Speed support simplifies local commissioning and firmware updates during installation.
Recommended
Consumer Remote Controls
Universal remote controls and RF key fobs benefit from the ATSAML22N17A-CFUT's touch-controller support for capacitive button pads and ultra-low standby current when idle. The Cortex-M0+ executes IR or BLE protocols within the 32 MHz budget, and the USB Full-Speed interface allows direct charging-port firmware upgrades in service centers. Designers use sleep-mode switching between IR transmit bursts and standby to achieve multi-year coin-cell life.
Recommended
Low-Power Wireless Sensor Hubs
Wireless sensor hubs that aggregate sub-GHz or BLE endpoints use the ATSAML22N17A-CFUT as a low-power gateway controller, capitalizing on its 128 KB Flash to hold network stacks and 16 KB SRAM for buffering incoming telemetry packets. The 32 MHz Cortex-M0+ manages duty-cycled reception windows while the backup mode keeps RTC-based synchronization alive. USB Full-Speed serves as a configuration and debug interface for installers.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML22N17A-CFUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML22N17A-AUT | ATSAML22N16A-CFUT | ATSAML22G18A-MUT | ATSAML22G16A-MUT | ATSAML21J18B-AUT |
|---|---|---|---|---|---|---|
| Package | UFBGA-100 (6x6 mm) | TQFP-100 | UFBGA-100 | VQFN-48-EP | VQFN-48-EP | TQFP-64 |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 48 MHz |
| Flash | 128 KB | 128 KB | 64 KB | 256 KB | 64 KB | 256 KB |
| SRAM | 16 KB | 16 KB | 8 KB | 32 KB | 8 KB | 32 KB |
| Operating Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.62 V to 3.63 V |
Key Differentiators
- Ultra-low backup current of 490 nA with RTC (vs ATSAM4S2CA-AU)
- Integrated USB 2.0 Full-Speed without external PHY (vs ATSAML22N16A-CFUT)
- Highest GPIO count and smallest 6x6 mm footprint (vs ATSAML22G16A-MUT (VQFN-48-EP))
Design Notes
Estimated: at 32 MHz and 1.25 mA active current, a duty cycle of 1% reduces average consumption to ~12.5 µA. Combine with 490 nA backup to target multi-year coin-cell life. Disable unused SERCOM blocks before sleep to avoid phantom leakage of several hundred nA per peripheral. Use the on-chip RTC and external 32.768 kHz crystal for accurate wake intervals without consuming the high-frequency oscillator.
Route the UFBGA-100 ball grid on a 0.5 mm pitch with via-in-pad or dog-bone fan-out. Decouple VDDIN with a 1 µF X7R 0402 ceramic placed within 2 mm of the ball, plus a 100 nF bypass on each VDDIO ball. Keep the 32.768 kHz crystal traces short and guard them with a ground ring to avoid capacitive loading that drifts the RTC. Per Microchip SAM L22 hardware design guide, the exposed die paddle must be soldered to the ground plane for thermal relief and signal return paths.
Do not assume the USB pins can drive 5 V - the ATSAML22N17A-CFUT USB block is 3.3 V only and requires level translation or a 3.3 V-only host. Watch the lockup condition when entering backup mode with peripherals still clocked; clear all interrupt flags and disable unused clocks before the WAIT instruction. Brown-out at 1.6 V can cause silent Flash corruption if writes are in progress - guard Flash writes with BOD33 interrupt disable.
Compliance Information
RoHS and REACH compliant per Microchip product page; lead-free and halogen-free per SAM L22 family data sheet. AEC-Q100 not applicable for this industrial-grade MCU; AEC-Q100 qualified variants are listed separately on the Microchip product page.
