ATSAML21J17B-AUT - 48MHz ARM Cortex-M0+ MCU 128KB | Microchip
N.º da peça: ATSAML21J17B-AUT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.65 | $4,65 |
| 10 | $4.18 | $41,80 |
| 100 | $3.72 | $372,00 |
| 500 | $3.35 | $1.675,00 |
| 1.000 | $2.98 | $2.980,00 |
ATSAML21J17B-AUT Visão geral
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.
Alternativas drop-in para ATSAML21J17B-AUT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAML21J17B-AUT (mesmo formato e footprint) — diferindo em ADC, Package, Active Current, SRAM, DAC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAML21J18B-AUT
✅ Drop-In✓ Em estoque
$4.55 / unidade
Ver ficha técnica →ATSAML21J16B-AUT
✅ Drop-In✓ Em estoque
$4.25 / unidade
Ver ficha técnica →ATSAML21E16B-AUT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$2.65 / unidade
Ver ficha técnica →ATSAML21J17B-AUT Classificações máximas e características elétricas
| 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) |
| Faixa de temperatura de operação | -40 C to +85 C |
| Encapsulamento | 64-TQFP (10x10 mm) |
| Contagem de pinos | 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 |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do ATSAML21J17B-AUT
| Pino 1 | VDDIO — I/O supply voltage |
| Pino 2 | PA00 — GPIO / SERCOM1[0] |
| Pino 3 | PA01 — GPIO / SERCOM1[1] |
| Pino 4 | PA02 — GPIO / SERCOM1[2] / ADC AIN[0] |
| Pino 5 | PA03 — GPIO / SERCOM1[3] / ADC AIN[1] / VREFA |
| Pino 6 | GND — Ground |
| Pino 7 | PA04 — GPIO / SERCOM0[0] / ADC AIN[2] |
| Pino 8 | PA05 — GPIO / SERCOM0[1] / ADC AIN[3] |
| Pino 9 | PA06 — GPIO / SERCOM0[2] / ADC AIN[4] |
| Pino 10 | PA07 — GPIO / SERCOM0[3] / ADC AIN[5] |
| Pino 11 | VDDIN — Main supply voltage input |
| Pino 12 | GND — Ground |
| Pino 13 | PA08 — GPIO / SERCOM2[0] / ADC AIN[6] |
| Pino 14 | PA09 — GPIO / SERCOM2[1] / ADC AIN[7] |
| Pino 15 | PA10 — GPIO / SERCOM2[2] / ADC AIN[8] |
| Pino 16 | PA11 — GPIO / SERCOM2[3] / ADC AIN[9] |
| Pino 17 | PA12 — GPIO / SERCOM4[0] |
| Pino 18 | PA13 — GPIO / SERCOM4[1] |
| Pino 19 | PA14 — GPIO / SERCOM4[2] / XCLK |
| Pino 20 | PA15 — GPIO / SERCOM4[3] |
| Pino 21 | PA16 — GPIO / SERCOM3[0] |
| Pino 22 | PA17 — GPIO / SERCOM3[1] |
| Pino 23 | PA18 — GPIO / SERCOM3[2] |
| Pino 24 | PA19 — GPIO / SERCOM3[3] |
| Pino 25 | PA20 — GPIO / SERCOM5[0] |
| Pino 26 | PA21 — GPIO / SERCOM5[1] |
| Pino 27 | PA22 — GPIO / SERCOM5[2] |
| Pino 28 | PA23 — GPIO / SERCOM5[3] |
| Pino 29 | PA24 — GPIO / USB_DM |
| Pino 30 | PA25 — GPIO / USB_DP |
| Pino 31 | GND — Ground |
| Pino 32 | VDDIO — I/O supply voltage |
| Pino 33 | PA26 — GPIO |
| Pino 34 | PA27 — GPIO |
| Pino 35 | PA28 — GPIO / Reset |
| Pino 36 | PA29 — GPIO |
| Pino 37 | PA30 — GPIO / SWCLK |
| Pino 38 | PA31 — GPIO / SWDIO |
| Pino 39 | PB00 — GPIO |
| Pino 40 | PB01 — GPIO |
| Pino 41 | PB02 — GPIO / SERCOM5[0] alt |
| Pino 42 | PB03 — GPIO / SERCOM5[1] alt |
| Pino 43 | PB04 — GPIO / SERCOM5[2] alt |
| Pino 44 | PB05 — GPIO / SERCOM5[3] alt |
| Pino 45 | PB06 — GPIO / SERCOM4[0] alt |
| Pino 46 | PB07 — GPIO / SERCOM4[1] alt |
| Pino 47 | PB08 — GPIO / SERCOM4[2] alt |
| Pino 48 | PB09 — GPIO / SERCOM4[3] alt |
| Pino 49 | PB10 — GPIO / SERCOM3[0] alt |
| Pino 50 | PB11 — GPIO / SERCOM3[1] alt |
| Pino 51 | PB12 — GPIO / SERCOM3[2] alt |
| Pino 52 | PB13 — GPIO / SERCOM3[3] alt |
| Pino 53 | PB14 — GPIO / SERCOM2[0] alt |
| Pino 54 | PB15 — GPIO / SERCOM2[1] alt |
| Pino 55 | PB16 — GPIO / SERCOM2[2] alt |
| Pino 56 | PB17 — GPIO / SERCOM2[3] alt |
| Pino 57 | PC00 — GPIO / SEG / COM |
| Pino 58 | PC01 — GPIO / SEG / COM |
| Pino 59 | PC02 — GPIO / SEG / COM |
| Pino 60 | PC03 — GPIO / SEG / COM |
| Pino 61 | PC04 — GPIO / SEG / COM |
| Pino 62 | PC05 — GPIO / SEG / COM |
| Pino 63 | GND — Ground |
| Pino 64 | VDDIN — Main supply voltage input |
Aplicações típicas
ATSAML21J17B-AUT é adequado para 7 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAML21J17B-AUT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Ultra-low 200 nA Sleep current with SleepWalking peripherals (vs ATSAMD21J17A-AU (Cortex-M0+ MCU))
- Functional Safety (FuSa) support for IEC 61508 SIL 2 (vs ATSAML21J16B-AUT (same family, lower memory))
- Integrated hardware segmented LCD controller (8x32) (vs External LCD driver IC solutions)
Notas de projeto
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.
Informações de conformidade
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.
