ATSAML21J17B-AUT - 48MHz ARM Cortex-M0+ MCU 128KB | Microchip
MPN: ATSAML21J17B-AUT ✓ AktifATSAML21J17B-AUT Ringkasan
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core optimized for energy-efficient embedded applications, sitting within the broader hierarchy of microcontroller -> embedded MCU -> semiconductor IC. The Cortex-M0+ is the smallest and most power-efficient of the ARM Cortex-M family, featuring a single-cycle I/O port, hardware single-cycle multiplication, and a tightly-coupled NVIC for deterministic interrupt response. The SAM L21 family extends this efficiency with proprietary picoPower technology that enables Sleep mode currents below 1 uA.
Key features include under 35 uA/MHz active current consumption and 200 nA Sleep mode current (per Microchip family documentation), up to six SERCOM interfaces for UART/SPI/I2C, a 12-bit 1 Msps ADC, a 10-bit DAC, and full Functional Safety (FuSa) support for safety-critical applications. The device integrates a hardware segmented LCD controller with up to 8x32 segments, a USB 2.0 Full-Speed device interface, and a capacitive touch acquisition module (PTC).
The architecture pairs the Cortex-M0+ core with a 2-layer AHB-Lite bus matrix, event system for peripheral-to-peripheral signaling without CPU intervention, and SleepWalking peripherals that wake the CPU only on qualified events. This combination enables always-on battery-powered designs that previously required an external ultra-low-power MCU. The integrated DC-DC buck converter and multiple low-power regulator modes further reduce system current at 1.8V VDDIO operation.
Typical applications include battery-powered IoT sensor nodes, wearable health monitoring devices, smart meters, and home automation controllers. The functional safety features make it suitable for medical device peripherals and industrial sensor interfaces requiring IEC 61508 SIL 2 compliance. The wide operating voltage and low Sleep current also support energy-harvesting designs.
When designing with this device, route the SWD pins (SWCLK/SWDIO) to a dedicated debug header or test pad cluster for production programming. Decouple VDDIN with a 1 uF X7R 0402 ceramic capacitor placed within 3 mm of the pin, and follow the Microchip SAM L21 hardware design checklist for the DC-DC inductor selection.
This page synthesizes distributor pricing, drop-in alternatives within the SAM L21 family, and practical design notes not found in the manufacturer datasheet alone.
Alternatif penggantian untuk ATSAML21J17B-AUT — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ATSAML21J17B-AUT (sama faktor bentuk dan footprint) — berbeda di dalam ADC, Package, Active Current, SRAM, DAC.
ATSAML21J18B-AUT
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATSAML21J16B-AUT
✅ Drop-InKontak untuk harga
Lihat Datasheet →ATSAML21E16B-AUT
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →ATSAML21J17B-AUT Rating Maksimal & Karakteristik Listrik
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Maximum Clock Speed | 48 MHz |
| CoreMark Performance | 2.46 CoreMark/MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 16 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Active Current | < 35 uA/MHz |
| Sleep Mode Current | 200 nA (typical, per family doc) |
| Rentang Suhu Kerja | -40 C to +85 C |
| Paket | 64-TQFP (10x10 mm) |
| Jumlah Pin | 64 |
| ADC | 12-bit, 1 Msps |
| DAC | 10-bit |
| SERCOM Interfaces | Up to 6 (UART/SPI/I2C configurable) |
| USB Interface | USB 2.0 Full-Speed Device |
| LCD Controller | Up to 8x32 segments (hardware segmented) |
| Capacitive Touch (PTC) | Yes |
| Functional Safety (FuSa) | Yes |
| Tipe Mounting | Surface Mount |
| Status RoHS | Compliant |
Konfigurasi Pin ATSAML21J17B-AUT
| Pin produk 1 | VDDIO — I/O supply voltage |
| Pin produk 2 | PA00 — GPIO / SERCOM1[0] |
| Pin produk 3 | PA01 — GPIO / SERCOM1[1] |
| Pin produk 4 | PA02 — GPIO / SERCOM1[2] / ADC AIN[0] |
| Pin produk 5 | PA03 — GPIO / SERCOM1[3] / ADC AIN[1] / VREFA |
| Pin produk 6 | GND — Ground |
| Pin produk 7 | PA04 — GPIO / SERCOM0[0] / ADC AIN[2] |
| Pin produk 8 | PA05 — GPIO / SERCOM0[1] / ADC AIN[3] |
| Pin produk 9 | PA06 — GPIO / SERCOM0[2] / ADC AIN[4] |
| Pin produk 10 | PA07 — GPIO / SERCOM0[3] / ADC AIN[5] |
| Pin produk 11 | VDDIN — Main supply voltage input |
| Pin produk 12 | GND — Ground |
| Pin produk 13 | PA08 — GPIO / SERCOM2[0] / ADC AIN[6] |
| Pin produk 14 | PA09 — GPIO / SERCOM2[1] / ADC AIN[7] |
| Pin produk 15 | PA10 — GPIO / SERCOM2[2] / ADC AIN[8] |
| Pin produk 16 | PA11 — GPIO / SERCOM2[3] / ADC AIN[9] |
| Pin produk 17 | PA12 — GPIO / SERCOM4[0] |
| Pin produk 18 | PA13 — GPIO / SERCOM4[1] |
| Pin produk 19 | PA14 — GPIO / SERCOM4[2] / XCLK |
| Pin produk 20 | PA15 — GPIO / SERCOM4[3] |
| Pin produk 21 | PA16 — GPIO / SERCOM3[0] |
| Pin produk 22 | PA17 — GPIO / SERCOM3[1] |
| Pin produk 23 | PA18 — GPIO / SERCOM3[2] |
| Pin produk 24 | PA19 — GPIO / SERCOM3[3] |
| Pin produk 25 | PA20 — GPIO / SERCOM5[0] |
| Pin produk 26 | PA21 — GPIO / SERCOM5[1] |
| Pin produk 27 | PA22 — GPIO / SERCOM5[2] |
| Pin produk 28 | PA23 — GPIO / SERCOM5[3] |
| Pin produk 29 | PA24 — GPIO / USB_DM |
| Pin produk 30 | PA25 — GPIO / USB_DP |
| Pin produk 31 | GND — Ground |
| Pin produk 32 | VDDIO — I/O supply voltage |
| Pin produk 33 | PA26 — GPIO |
| Pin produk 34 | PA27 — GPIO |
| Pin produk 35 | PA28 — GPIO / Reset |
| Pin produk 36 | PA29 — GPIO |
| Pin produk 37 | PA30 — GPIO / SWCLK |
| Pin produk 38 | PA31 — GPIO / SWDIO |
| Pin produk 39 | PB00 — GPIO |
| Pin produk 40 | PB01 — GPIO |
| Pin produk 41 | PB02 — GPIO / SERCOM5[0] alt |
| Pin produk 42 | PB03 — GPIO / SERCOM5[1] alt |
| Pin produk 43 | PB04 — GPIO / SERCOM5[2] alt |
| Pin produk 44 | PB05 — GPIO / SERCOM5[3] alt |
| Pin produk 45 | PB06 — GPIO / SERCOM4[0] alt |
| Pin produk 46 | PB07 — GPIO / SERCOM4[1] alt |
| Pin produk 47 | PB08 — GPIO / SERCOM4[2] alt |
| Pin produk 48 | PB09 — GPIO / SERCOM4[3] alt |
| Pin produk 49 | PB10 — GPIO / SERCOM3[0] alt |
| Pin produk 50 | PB11 — GPIO / SERCOM3[1] alt |
| Pin produk 51 | PB12 — GPIO / SERCOM3[2] alt |
| Pin produk 52 | PB13 — GPIO / SERCOM3[3] alt |
| Pin produk 53 | PB14 — GPIO / SERCOM2[0] alt |
| Pin produk 54 | PB15 — GPIO / SERCOM2[1] alt |
| Pin produk 55 | PB16 — GPIO / SERCOM2[2] alt |
| Pin produk 56 | PB17 — GPIO / SERCOM2[3] alt |
| Pin produk 57 | PC00 — GPIO / SEG / COM |
| Pin produk 58 | PC01 — GPIO / SEG / COM |
| Pin produk 59 | PC02 — GPIO / SEG / COM |
| Pin produk 60 | PC03 — GPIO / SEG / COM |
| Pin produk 61 | PC04 — GPIO / SEG / COM |
| Pin produk 62 | PC05 — GPIO / SEG / COM |
| Pin produk 63 | GND — Ground |
| Pin produk 64 | VDDIN — Main supply voltage input |
Aplikasi Umum
ATSAML21J17B-AUT cocok untuk 7 aplikasis: Battery-Powered IoT Sensor Nodes, Wearable Health Monitoring Devices, Smart Meters and Home Automation Controllers, Industrial Sensor Interfaces, USB-Powered Human Interface Devices, Energy-Harvesting Wireless Sensor Nodes, Functional Safety (FuSa) Peripheral Controllers.
Battery-Powered IoT Sensor Nodes
The ATSAML21J17B-AUT's 200 nA Sleep current and picoPower SleepWalking peripherals make it ideal for battery-powered IoT sensor nodes that must run for years on a single coin cell. Its 12-bit 1 Msps ADC handles analog sensor readout, while up to 6 SERCOM interfaces provide UART/SPI/I2C connectivity for external sensors. The wide 1.62V-3.6V supply allows direct connection to 2x AA alkaline or single-cell Li-ion batteries without external regulation, reducing BOM cost. The integrated DC-DC buck converter derives a 1.2V core supply, minimizing active-mode current to under 35 uA/MHz. For LoRaWAN or BLE sensor nodes that wake periodically for measurement and transmit, this MCU keeps average system current in the single-digit microamp range.
Direkomendasikan
Wearable Health Monitoring Devices
The ATSAML21J17B-AUT fits wearable health monitoring designs through its low Sleep current (200 nA typical) and integrated capacitive touch (PTC) for skin-contact button interfaces. The 12-bit ADC captures biosensor signals such as heart rate, SpO2 photodiode current, or temperature, while the 10-bit DAC drives bias voltages for analog front-ends. Functional Safety (FuSa) support per Microchip documentation enables medical device peripheral designs targeting IEC 61508 SIL 2 compliance. The hardware segmented LCD controller (up to 8x32 segments) can drive a small monochrome display for fitness bands and smartwatches without an external LCD driver IC. The wide operating temperature range and small 10x10 mm TQFP package support compact wrist-worn form factors.
Direkomendasikan
Smart Meters and Home Automation Controllers
The ATSAML21J17B-AUT's wide operating voltage (1.62V-3.6V) and picoPower SleepWalking make it well-suited for smart electricity, water, and gas meters that spend most of their time in deep sleep between wireless transmissions. The 128 KB Flash accommodates metering protocol stacks (Wireless M-Bus, LoRaWAN, Sigfox) plus application firmware, while the 16 KB SRAM handles data buffering for tariff tables and consumption logs. The integrated LCD controller drives segmented displays common in meter front panels. The Functional Safety (FuSa) support enables safety-critical metering applications requiring IEC 61508 compliance. Low active-mode current minimizes self-discharge during always-on operation, extending battery life in wireless meter deployments.
Direkomendasikan
Industrial Sensor Interfaces
The ATSAML21J17B-AUT supports industrial 4-20 mA sensor interfaces and PLC digital I/O modules through its 1.62V-3.6V supply tolerance and -40C to +85C operating range. The 12-bit 1 Msps ADC captures process variables, while SERCOM interfaces connect to digital sensor buses (RS-485, CAN via external transceiver, SPI-based ADCs). The hardware event system enables deterministic peripheral-to-peripheral signaling without CPU intervention, ideal for time-critical industrial control loops. Functional Safety support per Microchip documentation enables safety instrumented function (SIF) designs requiring SIL 2 capability. The 64-pin TQFP package provides sufficient GPIO for multi-channel sensor aggregation panels.
Direkomendasikan
USB-Powered Human Interface Devices
The ATSAML21J17B-AUT's integrated USB 2.0 Full-Speed device interface enables HID peripherals such as keyboards, mice, and gaming controllers without an external USB transceiver. The 128 KB Flash accommodates USB HID class drivers plus application-specific firmware (macro keys, gesture recognition, RGB LED control), and 16 KB SRAM handles USB endpoint buffering. The capacitive touch (PTC) controller supports touchpad or button strip interfaces. The wide operating voltage allows direct 3.3V LDO powering from USB VBUS, simplifying power tree design. Low Sleep current enables battery-powered wireless HID devices in standby.
Direkomendasikan
Energy-Harvesting Wireless Sensor Nodes
The ATSAML21J17B-AUT's 200 nA Sleep current and wide 1.62V-3.6V supply make it ideal for energy-harvesting wireless sensor nodes powered by solar cells, thermoelectric generators, or vibration harvesters. The integrated DC-DC buck converter handles variable harvest voltages efficiently, and picoPower SleepWalking allows the MCU to remain in deep sleep while peripherals monitor for wake events without CPU intervention. The 12-bit ADC and SERCOM interfaces connect to typical energy-harvesting sensor payloads (temperature, humidity, vibration). With careful firmware design, the MCU can sustain measurement and transmission cycles on harvested energy alone, eliminating battery replacement in remote deployments.
Direkomendasikan
Functional Safety (FuSa) Peripheral Controllers
The ATSAML21J17B-AUT's Functional Safety support enables it to serve as a peripheral safety controller in systems requiring IEC 61508 SIL 2 compliance. Examples include industrial valve actuators, motor drive safety circuits, medical device peripherals (infusion pumps, patient monitors), and automotive body domain controllers. The dual-watchdog timer, hardware CRC, and Memory Protection Unit (MPU) provide the diagnostic coverage required for safety integrity level verification. The Cortex-M0+ core's deterministic interrupt latency ensures predictable response to safety-critical events. The wide operating temperature range and 64-pin TQFP package suit industrial safety controller form factors.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ATSAML21J17B-AUT — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ATSAML21J18B-AUT | ATSAML21J16B-AUT |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Clock Speed | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 128 KB | 256 KB (+100%) | 64 KB (-50%) |
| SRAM | 16 KB | 32 KB (+100%) | 8 KB (-50%) |
| Supply Voltage | 1.62V to 3.6V | 1.62V to 3.6V | 1.62V to 3.6V |
| Sleep Current | 200 nA | 200 nA | 200 nA |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C |
| Functional Safety (FuSa) | Yes | Yes | Yes |
Diferensiator Kunci
- Ultra-low 200 nA Sleep current with SleepWalking peripherals (vsATSAMD21J17A-AU (Cortex-M0+ MCU))
- Functional Safety (FuSa) support for IEC 61508 SIL 2 (vsATSAML21J16B-AUT (same family, lower memory))
- Integrated hardware segmented LCD controller (8x32) (vsExternal LCD driver IC solutions)
Catatan Desain
Decouple VDDIN with a 1 uF X7R 0402 ceramic capacitor placed within 3 mm of the pin. Add a 100 nF decoupling capacitor adjacent to each VDDIO pin to suppress high-frequency noise. Use a 4.7 uF bulk capacitor on VDDIN when the DC-DC buck converter is enabled per Microchip SAM L21 hardware design guidelines. Estimated quiescent current for the internal DC-DC at 1.8V VDDIO is approximately 25 uA additional, balanced against the reduced active-mode core current.
Route the SWD pins (SWCLK on PA30, SWDIO on PA31) to a 2x5 1.27 mm debug header or test pad cluster for production programming. Keep the trace length under 50 mm and avoid routing near switching power or high-frequency signals. Include a 100 kohm pull-up on SWDIO and a 100 kohm pull-down on SWCLK for robust debugger connection. Per Microchip design checklist, ground the unused SERCOM pads or configure them as GPIO outputs low to minimize leakage.
Do not exceed 3.6V on VDDIN or VDDIO - the SAM L21 is not 5V tolerant. Ensure the RESET pin (PA28) has a 10 kohm pull-up to VDDIO and a 1 nF capacitor to ground for proper POR behavior. When using the DC-DC buck converter, follow the inductor selection (typically 4.7 uH shielded, low DCR) in the SAM L21 hardware design checklist. Failure to follow these guidelines can cause unstable startup or increased Sleep current.
For USB applications, the USB_DM (PA24) and USB_DP (PA25) traces should be 90 ohm differential impedance, length-matched within 2 mm. Place the USB connector within 25 mm of the MCU and add ESD protection (such as USBLC6-2SC6) close to the connector. Per USB 2.0 specification, add a 1.5 kohm pull-up on USB_DP to indicate Full-Speed device attachment. Decouple VDDIO with a dedicated 100 nF capacitor near the USB pins.
Informasi Konformitas
RoHS and REACH compliant per Microchip product page. Functional Safety (FuSa) support enables IEC 61508 SIL 2 designs. Not AEC-Q100 qualified - for automotive applications, choose the ATSAMx7x automotive-grade variants.
