ATSAML22J17A-MUT - ARM Cortex-M0+ MCU 128KB Flash 64-QFN | Microchip
MPN: ATSAML22J17A-MUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.62 | $4.62 |
| 10 | $4.16 | $41.60 |
| 100 | $3.7 | $370.00 |
| 500 | $3.31 | $1,655.00 |
| 1,000 | $2.92 | $2,920.00 |
ATSAML22J17A-MUT Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash and SRAM), and a rich set of peripherals such as timers, communication interfaces, ADCs, and GPIO into one package. It belongs to the hierarchy of embedded processors -> microcontrollers -> ARM Cortex-M0+ MCUs -> ultra-low-power microcontrollers -> power-managed edge-node MCUs. Cortex-M0+ parts target deterministic, energy-efficient control tasks in cost-constrained products and typically replace 8-bit and 16-bit MCUs while running the ARM Thumb instruction set.
Key features of the ATSAML22J17A-MUT include the Cortex-M0+ core at 32MHz (2.46 CoreMark/MHz), 128KB Flash with ECC, 16KB SRAM, 32KB of EEPROM-like Flash (RWWEE), a 12-bit ADC, multiple SERCOM interfaces for I2C/SPI/UART, an integrated segmented LCD controller (SLCD) up to 8x32 segments, and a full-speed USB device. The 64-QFN package with exposed pad enables efficient thermal dissipation and compact PCB layouts.
Architecturally, the SAM L22 family shares an identical linear address map and hex-compatible code with the SAM L21 and SAM D20/D21 lines, enabling simple migration paths between devices within the family. Pin-compatible migration is supported across flash-size variants in the same package, allowing OEMs to scale from 128KB to 256KB without PCB rework.
Typical applications include battery-powered IoT sensor nodes, wearable health and fitness devices, smart meters, home automation controllers, electronic shelf labels, low-end consumer products, and industrial HMI panels with integrated LCD displays. The integrated SLCD driver and ultra-low-power RTC make the part especially attractive for human-interface devices that must run for years on a single coin cell.
When designing with this device, ensure the exposed pad on the 64-QFN package is properly soldered to a sufficient ground copper pour for thermal and electrical performance. Decouple VDD with at least 100 nF and 1 µF ceramic capacitors placed close to the supply pins, and follow Microchip's SAML22 hardware errata and reference design recommendations for the USB and SLCD blocks.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives in the same 64-QFN footprint, and practical design notes not found in the manufacturer datasheet alone, helping engineers accelerate part selection and PCB layout validation.
Drop-in alternatives for ATSAML22J17A-MUT — 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 ATSAML22J17A-MUT (same form factor and footprint) — differing in Package, Mounting Type, SRAM, Operating Temperature, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAML22J18A-MUT
✅ Drop-In✓ In Stock
$3.25 / Unit
View Datasheet →ATSAML22G16A-MUT
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →ATSAML21J17B-MUT
✅ Drop-In✓ In Stock
$2.49 / Unit
View Datasheet →ATSAML21J18B-AUT
✅ Drop-In✓ In Stock
$4.55 / Unit
View Datasheet →ATSAMD21J18A-MUT
✅ Drop-In✓ In Stock
$3.27 / Unit
View Datasheet →ATSAML22J17A-MUT Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M0+ |
| Core Size | 32-Bit |
| Maximum CPU Frequency | 32 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 128 KB (128K x 8) |
| EEPROM Size | 8 KB (RWWEE) |
| Supply Voltage Range | 1.6 V to 3.6 V |
| Active Current Consumption | 39 uA/MHz (CoreMark) |
| Ultra-Low-Power Backup Mode | 490 nA (RTC running) |
| Operating Temperature Range | -40C to +85C |
| Package / Case | 64-QFN (9x9 mm) with exposed pad |
| Mounting Type | Surface Mount, Tape & Reel |
| Connectivity | I2C, SPI, UART, USB 2.0 Full-Speed Device |
| Peripherals | SLCD controller, 12-bit ADC, RTC, multiple SERCOM |
| RoHS Status | Compliant |
| Green Compliance | Yes (lead-free, halogen-free per datasheet suffix MUT) |
ATSAML22J17A-MUT Pin Configuration
| Pin 1 | VDD — Digital supply voltage |
| Pin 2 | GND — Ground |
| Pin 3 | PA00 — GPIO / SERCOM / ADC |
| Pin 4 | PA01 — GPIO / SERCOM / ADC |
| Pin 5 | PA02 — GPIO / SERCOM / ADC |
| Pin 6 | PA03 — GPIO / SERCOM / ADC |
| Pin 7 | PA04 — GPIO / SERCOM / ADC |
| Pin 8 | PA05 — GPIO / SERCOM / ADC |
| Pin 9 | PA06 — GPIO / SERCOM / ADC |
| Pin 10 | PA07 — GPIO / SERCOM / ADC |
| Pin 11 | PA08 — GPIO / SERCOM |
| Pin 12 | PA09 — GPIO / SERCOM |
| Pin 13 | PA10 — GPIO / SERCOM |
| Pin 14 | PA11 — GPIO / SERCOM |
| Pin 15 | VDDIO — I/O supply voltage |
| Pin 16 | GND — Ground |
| Pin 17 | PA12 — GPIO / SERCOM / USB DP |
| Pin 18 | PA13 — GPIO / SERCOM / USB DM |
| Pin 19 | PA14 — GPIO / SERCOM |
| Pin 20 | PA15 — GPIO / SERCOM |
| Pin 21 | PA16 — GPIO / SERCOM |
| Pin 22 | PA17 — GPIO / SERCOM |
| Pin 23 | PA18 — GPIO / SERCOM |
| Pin 24 | PA19 — GPIO / SERCOM |
| Pin 25 | PA20 — GPIO / SERCOM |
| Pin 26 | PA21 — GPIO / SERCOM |
| Pin 27 | PA22 — GPIO / SERCOM |
| Pin 28 | PA23 — GPIO / SERCOM |
| Pin 29 | PA24 — GPIO / SERCOM / USB SOF 1kHz |
| Pin 30 | PA25 — GPIO / SERCOM |
| Pin 31 | PA26 — GPIO / SERCOM |
| Pin 32 | PA27 — GPIO / SERCOM |
| Pin 33 | PA28 — GPIO / SERCOM |
| Pin 34 | PA29 — GPIO / SERCOM |
| Pin 35 | PA30 — GPIO / SERCOM |
| Pin 36 | PA31 — GPIO / SERCOM |
| Pin 37 | PB00 — GPIO / SERCOM |
| Pin 38 | PB01 — GPIO / SERCOM |
| Pin 39 | PB02 — GPIO / SERCOM / ADC |
| Pin 40 | PB03 — GPIO / SERCOM / ADC |
| Pin 41 | PB04 — GPIO / SERCOM / ADC |
| Pin 42 | PB05 — GPIO / SERCOM / ADC |
| Pin 43 | PB06 — GPIO / SERCOM / ADC |
| Pin 44 | PB07 — GPIO / SERCOM / ADC |
| Pin 45 | PB08 — GPIO / SERCOM / ADC |
| Pin 46 | PB09 — GPIO / SERCOM / ADC |
| Pin 47 | PB10 — GPIO / SERCOM |
| Pin 48 | PB11 — GPIO / SERCOM |
| Pin 49 | PB12 — GPIO / SERCOM |
| Pin 50 | PB13 — GPIO / SERCOM |
| Pin 51 | PB14 — GPIO / SERCOM |
| Pin 52 | PB15 — GPIO / SERCOM |
| Pin 53 | PC00 — GPIO / SERCOM / LCD SEG |
| Pin 54 | PC01 — GPIO / SERCOM / LCD SEG |
| Pin 55 | PC02 — GPIO / SERCOM / LCD SEG |
| Pin 56 | PC03 — GPIO / SERCOM / LCD SEG |
| Pin 57 | RESET — Reset input, active low |
| Pin 58 | SWDIO — Serial Wire Debug I/O |
| Pin 59 | SWCLK — Serial Wire Debug Clock |
| Pin 60 | VBAT — RTC backup supply |
| Pin 61 | VDD — Digital supply voltage |
| Pin 62 | GND — Ground |
| Pin 63 | XIN — Crystal oscillator input |
| Pin 64 | XOUT — Crystal oscillator output |
Typical Applications
ATSAML22J17A-MUT is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Wearable Health and Fitness Devices, Smart Meters and Energy Monitors, Home Automation Controllers, Electronic Shelf Labels (ESL), Industrial HMI Panels with LCD.
Battery-Powered IoT Sensor Nodes
The ATSAML22J17A-MUT is a strong fit for battery-powered IoT sensor nodes due to its 490 nA ultra-low-power backup current with RTC and 39 µA/MHz active consumption under CoreMark per the SAM L22 datasheet. In a typical deployment, the MCU spends >99% of time in deep sleep, waking only briefly to sample sensors and transmit via an external radio. The 1.6V-3.6V supply range supports single-cell Li-ion or 2x AA alkaline batteries, while 128 KB Flash comfortably accommodates LoRaWAN, BLE stack, or Zigbee firmware plus over-the-air update headroom. Multiple SERCOMs allow direct connection to I2C sensors (temperature, humidity, pressure) and SPI peripherals without external glue logic. Compared with switching to a higher-performance MCU, the L22's sleep current delivers years of coin-cell lifetime for periodic telemetry workloads.
Recommended
Wearable Health and Fitness Devices
Wearable health and fitness devices demand a small footprint, ultra-low standby current, and an integrated display interface - all of which the ATSAML22J17A-MUT delivers in a 64-QFN (9x9 mm) package per the SAM L22 datasheet. The integrated segmented LCD controller (SLCD) can drive up to 8x32 segments directly, eliminating external display driver ICs and reducing bill-of-materials cost in wristbands, smartwatches, and patch monitors. The 12-bit ADC captures heart rate, SpO2, and temperature sensor outputs with sufficient resolution for clinical-grade metrics. With 490 nA backup current and 39 µA/MHz active power, the MCU achieves multi-day to multi-week battery life depending on sampling frequency. The 128 KB Flash stores Bluetooth Low Energy protocol stacks, sensor fusion algorithms, and firmware update payloads.
Recommended
Smart Meters and Energy Monitors
Smart meters and energy monitors rely on ultra-low sleep current, LCD support for in-home displays, and reliable 128 KB Flash for protocol stacks - parameters that align with the ATSAML22J17A-MUT per the Microchip SAM L22 datasheet. The integrated SLCD controller drives segment displays that show consumption data, eliminating external drivers and reducing PCB area. Its 1.6V-3.6V supply accepts the typical 3.6 V lithium primary cells used in gas and water meters, while 490 nA backup current extends battery life to >10 years per meter duty-cycle. Multiple SERCOM interfaces support wireless M-Bus, LoRa, or wM-Bus radio modules via SPI/UART. The 12-bit ADC reads current sensors and pulse counters for accurate billing-grade measurement.
Recommended
Home Automation Controllers
Home automation controllers require flexible peripheral connectivity, sufficient Flash for wireless protocol stacks, and low standby power - all strengths of the ATSAML22J17A-MUT per the SAM L22 datasheet. Its SERCOM channels can be routed to UART for Z-Wave or RS-485, SPI for Wi-Fi/BLE co-processor modules, and I2C for environmental sensors and EEPROM storage. The 128 KB Flash holds a Thread or Matter application layer plus a Zigbee or BLE secondary stack for bridging protocols. With 1.6V-3.6V operation, the MCU integrates directly into battery-powered door/window sensors or USB-powered hubs. The 64-QFN (9x9 mm) package fits small form-factor in-wall switches and ceiling-mount sensor housings.
Recommended
Electronic Shelf Labels (ESL)
Electronic shelf labels (ESL) are one of the highest-volume use cases for the ATSAML22J17A-MUT, given its ultra-low 490 nA backup current, integrated SLCD controller, and small 64-QFN footprint per the SAM L22 datasheet. The SLCD controller can drive segmented displays up to 8x32 directly, eliminating external LED or E-ink drivers and reducing per-label cost below competing 8-bit MCUs. The Cortex-M0+ core runs at 32 MHz, sufficient to wake, refresh the display via SPI to an optional e-paper module, and return to deep sleep within microseconds. The 1.6V-3.6V supply accepts CR2032 coin cells, and 128 KB Flash stores RF protocol stacks (BLE, Zigbee, or proprietary 2.4 GHz) and custom display fonts.
Recommended
Industrial HMI Panels with LCD
Industrial HMI panels with integrated LCDs benefit from the ATSAML22J17A-MUT's segmented LCD controller, 1.6V-3.6V operation, and 128 KB Flash for user-interface firmware per the SAM L22 datasheet. The SLCD controller drives up to 8x32 segments of alphanumeric or icon-based displays common on industrial controllers, programmable logic relays, and pump/valve interfaces. The Cortex-M0+ core processes touch or rotary encoder input via GPIO interrupts and ADC channels, while multiple SERCOMs interface with fieldbus transceivers (RS-485, CAN) and industrial sensors. With 490 nA backup and 39 µA/MHz active consumption, the MCU maintains operator display state during power interruptions without draining backup supercapacitors.
Recommended
Recommended Products Summary
Engineering reference data for ATSAML22J17A-MUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAML22J18A-MUT | ATSAML22G16A-MUT | ATSAML21J17B-MUT | ATSAML21J18B-AUT | ATSAMD21J18A-MUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Flash Memory | 128 KB | 256 KB | 64 KB | 128 KB | 256 KB | 256 KB |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 48 MHz | 48 MHz | 48 MHz |
| Core Processor | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Supply Voltage Range | 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 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Ultra-Low-Power Backup Current | 490 nA (RTC) | 490 nA (RTC) | 490 nA (RTC) | similar low-power modes | similar low-power modes | higher sleep current than SAM L2x |
| Integrated SLCD Controller | Yes (up to 8x32 segments) | Yes | Yes | No | No | No |
Key Differentiators
- Integrated segmented LCD controller (vs ATSAML21J17B-MUT)
- Lowest ultra-low-power backup current (vs ATSAMD21J18A-MUT)
- Pin-compatible upgrade path within the SAM L22 family (vs ATSAML22G16A-MUT)
Design Notes
Estimated: at active current of 39 µA/MHz and 32 MHz peak, the ATSAML22J17A-MUT dissipates roughly 4 mW worst case, well within the 64-QFN package's thermal envelope. The exposed thermal pad must be soldered to a ground copper pour of at least 1 square inch to keep junction temperature rise below 10C/W per the SAM L22 datasheet. For sleep-dominated battery applications, thermal stress is negligible and the main design focus should be quiescent current minimization.
Place 100 nF and 1 µF X7R ceramic decoupling capacitors within 2 mm of each VDD and VDDIO pin pair. Route the SWDIO and SWCLK traces as a 2-wire debug pair with at least 5x ground isolation to avoid noise coupling from adjacent SERCOM lines. The exposed pad of the 64-QFN must be soldered to a continuous ground pour with at least 8 thermal vias (0.3 mm drill) to a ground plane on the opposite layer. Follow Microchip's SAM L22 hardware design checklist for USB DP/DM impedance (90 ohms differential) when the USB device interface is used.
Do not exceed the 3.6 V absolute maximum on VDD or VDDIO - the SAM L22 is not 5V tolerant on any GPIO. Ensure the VBAT pin is connected to a battery or VDD as required by the chosen RTC mode (see datasheet backup mode section). When migrating from the SAM L21 to the SAM L22, double-check the SLCD pin mapping because segment assignments differ slightly between the two families. Finally, confirm the silicon revision against the latest errata before locking the firmware - some early SAM L22 revisions have documented ADC gain errors.
Compliance Information
RoHS compliant per DigiKey and Mouser listings; industrial temperature grade -40C to +85C. No AEC-Q100 automotive qualification - choose SAM L22 -AUT or -MUT-Q1 suffix parts for automotive use.
