ATSAML21J17B-AUT - 48MHz ARM Cortex-M0+ MCU 128KB | Microchip
Référence : ATSAML21J17B-AUT ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour ATSAML21J17B-AUT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATSAML21J17B-AUT (même facteur de forme et même empreinte) — différant par ADC, Package, Active Current, SRAM, DAC.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAML21J18B-AUT
✅ Remplacement direct✓ En stock
$4.55 / unité
Voir la fiche technique →ATSAML21J16B-AUT
✅ Remplacement direct✓ En stock
$4.25 / unité
Voir la fiche technique →ATSAML21E16B-AUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.65 / unité
Voir la fiche technique →ATSAML21J17B-AUT Valeurs maximales et caractéristiques électriques
| 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) |
| Plage de température de fonctionnement | -40 C to +85 C |
| Boîtier | 64-TQFP (10x10 mm) |
| Nombre de broches | 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 |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de ATSAML21J17B-AUT
| Broche 1 | VDDIO — I/O supply voltage |
| Broche 2 | PA00 — GPIO / SERCOM1[0] |
| Broche 3 | PA01 — GPIO / SERCOM1[1] |
| Broche 4 | PA02 — GPIO / SERCOM1[2] / ADC AIN[0] |
| Broche 5 | PA03 — GPIO / SERCOM1[3] / ADC AIN[1] / VREFA |
| Broche 6 | GND — Ground |
| Broche 7 | PA04 — GPIO / SERCOM0[0] / ADC AIN[2] |
| Broche 8 | PA05 — GPIO / SERCOM0[1] / ADC AIN[3] |
| Broche 9 | PA06 — GPIO / SERCOM0[2] / ADC AIN[4] |
| Broche 10 | PA07 — GPIO / SERCOM0[3] / ADC AIN[5] |
| Broche 11 | VDDIN — Main supply voltage input |
| Broche 12 | GND — Ground |
| Broche 13 | PA08 — GPIO / SERCOM2[0] / ADC AIN[6] |
| Broche 14 | PA09 — GPIO / SERCOM2[1] / ADC AIN[7] |
| Broche 15 | PA10 — GPIO / SERCOM2[2] / ADC AIN[8] |
| Broche 16 | PA11 — GPIO / SERCOM2[3] / ADC AIN[9] |
| Broche 17 | PA12 — GPIO / SERCOM4[0] |
| Broche 18 | PA13 — GPIO / SERCOM4[1] |
| Broche 19 | PA14 — GPIO / SERCOM4[2] / XCLK |
| Broche 20 | PA15 — GPIO / SERCOM4[3] |
| Broche 21 | PA16 — GPIO / SERCOM3[0] |
| Broche 22 | PA17 — GPIO / SERCOM3[1] |
| Broche 23 | PA18 — GPIO / SERCOM3[2] |
| Broche 24 | PA19 — GPIO / SERCOM3[3] |
| Broche 25 | PA20 — GPIO / SERCOM5[0] |
| Broche 26 | PA21 — GPIO / SERCOM5[1] |
| Broche 27 | PA22 — GPIO / SERCOM5[2] |
| Broche 28 | PA23 — GPIO / SERCOM5[3] |
| Broche 29 | PA24 — GPIO / USB_DM |
| Broche 30 | PA25 — GPIO / USB_DP |
| Broche 31 | GND — Ground |
| Broche 32 | VDDIO — I/O supply voltage |
| Broche 33 | PA26 — GPIO |
| Broche 34 | PA27 — GPIO |
| Broche 35 | PA28 — GPIO / Reset |
| Broche 36 | PA29 — GPIO |
| Broche 37 | PA30 — GPIO / SWCLK |
| Broche 38 | PA31 — GPIO / SWDIO |
| Broche 39 | PB00 — GPIO |
| Broche 40 | PB01 — GPIO |
| Broche 41 | PB02 — GPIO / SERCOM5[0] alt |
| Broche 42 | PB03 — GPIO / SERCOM5[1] alt |
| Broche 43 | PB04 — GPIO / SERCOM5[2] alt |
| Broche 44 | PB05 — GPIO / SERCOM5[3] alt |
| Broche 45 | PB06 — GPIO / SERCOM4[0] alt |
| Broche 46 | PB07 — GPIO / SERCOM4[1] alt |
| Broche 47 | PB08 — GPIO / SERCOM4[2] alt |
| Broche 48 | PB09 — GPIO / SERCOM4[3] alt |
| Broche 49 | PB10 — GPIO / SERCOM3[0] alt |
| Broche 50 | PB11 — GPIO / SERCOM3[1] alt |
| Broche 51 | PB12 — GPIO / SERCOM3[2] alt |
| Broche 52 | PB13 — GPIO / SERCOM3[3] alt |
| Broche 53 | PB14 — GPIO / SERCOM2[0] alt |
| Broche 54 | PB15 — GPIO / SERCOM2[1] alt |
| Broche 55 | PB16 — GPIO / SERCOM2[2] alt |
| Broche 56 | PB17 — GPIO / SERCOM2[3] alt |
| Broche 57 | PC00 — GPIO / SEG / COM |
| Broche 58 | PC01 — GPIO / SEG / COM |
| Broche 59 | PC02 — GPIO / SEG / COM |
| Broche 60 | PC03 — GPIO / SEG / COM |
| Broche 61 | PC04 — GPIO / SEG / COM |
| Broche 62 | PC05 — GPIO / SEG / COM |
| Broche 63 | GND — Ground |
| Broche 64 | VDDIN — Main supply voltage input |
Applications typiques
ATSAML21J17B-AUT convient pour 7 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAML21J17B-AUT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
