ATSAMD21G17L-MNT - SAM D21G Cortex-M0+ MCU 128KB Flash 48-QFN | Microchip
N.º da peça: ATSAMD21G17L-MNT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.69 | $2,69 |
| 10 | $2.42 | $24,20 |
| 100 | $2.15 | $215,00 |
| 500 | $1.85 | $925,00 |
| 1.000 | $1.65 | $1.650,00 |
| 3.000 | $1.45 | $4.350,00 |
ATSAMD21G17L-MNT Visão geral
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals such as timers, communication interfaces and ADCs. Within the broader taxonomy, an MCU belongs to the semiconductor category, then to microcontrollers, then to ARM Cortex-M class devices, and finally to the Cortex-M0+ sub-class - the smallest, most energy-efficient ARM core designed for deterministic real-time control. The ATSAMD21G17L sits at the entry point of the SAM D20/D21 family, balancing memory, pin count, and peripheral mix for cost-sensitive applications.
The device features 128 KB of in-system programmable Flash with 4 KB read-while-write (RWW) capability, 16 KB SRAM, a 12-bit 350 ksps ADC with up to 20 channels, two analog comparators, six SERCOM modules configurable as UART/SPI/I2C, a USB 2.0 Full-Speed device (no PHY needed), up to 38 GPIO, a 24-bit PWM timer counter, and a hardware peripheral touch controller supporting capacitive buttons, sliders, and wheel sensing. The integrated PTC enables touch-driven UI without an external touch IC, lowering BOM cost in HMI applications.
Architecturally, the ATSAMD21G17L uses Microchip's event system for inter-peripheral signaling without CPU intervention, a 6-channel DMA controller to offload data movement, and an interrupt controller supporting up to 16 priority levels. The USB module integrates a 3.3 V regulator and transceiver, allowing direct bus-powered designs. Cryptographic accelerators are not present on the 'G17' part - those are reserved for the D21 'E' and 'J' variants - which keeps pricing low for lighting and metering applications that do not require on-chip crypto.
Typical applications include LED lighting controllers with capacitive touch dimmers, USB-CDC virtual COM-port bridges, smart-home sensor hubs, IoT end nodes using UART/SPI peripherals, and consumer devices requiring small form-factor MCUs. The wide 1.62 V to 3.63 V operating range lets the same part work from a single Li-ion cell, two AA cells, or a regulated 3.3 V rail. Combined with 105 C maximum junction temperature support (L-suffix), the MNT suffix (tape-and-reel, matte-Sn finish) is qualified for high-volume manufacturing.
When designing with this device, pay close attention to PCB layout of the exposed pad (EP) - it must be soldered to a continuous ground plane for thermal dissipation and electrical reference, and decoupling must use at least 100 nF + 4.7 uF per VDD pin. For USB applications, the D+/D- traces require 90-ohm differential impedance, and the 48 MHz core must be sourced from a 32.768 kHz crystal via the DFLL or from the internal 8 MHz oscillator trimmed to +/- 2%. This page synthesizes distributor pricing from DigiKey, Mouser, LCSC and Heisener, drop-in same-brand SAM D21 alternatives, and practical design notes not aggregated elsewhere.
Alternativas drop-in para ATSAMD21G17L-MNT — 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 ATSAMD21G17L-MNT (mesmo formato e footprint) — diferindo em Operating Temperature, Package, ADC, USB, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAMD21G17L-MN
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMD21G17L-MUT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMD21G18L-MNT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMD21G16L-MUT
✅ Drop-In✓ Em estoque
$2.55 / unidade
Ver ficha técnica →ATSAMD21E17L-MN
✅ Drop-In✓ Em estoque
$1.85 / unidade
Ver ficha técnica →ATSAMD21G17D-MU
✅ Drop-In✓ Em estoque
$2.1 / unidade
Ver ficha técnica →ATSAMD21G17A-MFT
✅ Drop-In✓ Em estoque
$2.4 / unidade
Ver ficha técnica →ATSAMD21G17L-MNT Classificações máximas e características elétricas
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Family | SAM D21G |
| Series | ATSAMD21 |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 16 KB |
| Read-While-Write Flash Partition | 4 KB |
| Supply Voltage (VDD) | 1.62 V to 3.63 V |
| I/O Voltage | 1.62 V to 3.63 V (same as VDD) |
| GPIO Count | Up to 38 |
| ADC | 12-bit, up to 20 channels, 350 ksps |
| Analog Comparators | 2 |
| SERCOM Modules | 6 (configurable as UART/SPI/I2C) |
| USB | USB 2.0 Full-Speed Device, integrated transceiver |
| Peripheral Touch Controller (PTC) | Yes (capacitive touch sensing) |
| DMA Channels | 6 |
| Timers/Counters | TC0..TC5 + TCC0..TCC1, multiple PWM outputs |
| Temperatura de operação | -40C to +105C (L-suffix, industrial) |
| Encapsulamento | 48-QFN (7x7 mm) with exposed pad |
| Tipo de montagem | Surface Mount, Tape and Reel (MNT suffix) |
| Lead Finish | Matte tin (lead-free, GREEN) |
| Status RoHS | Compliant |
Configuração de pinos do ATSAMD21G17L-MNT
| Pino 1 | PA00 — PORTA GPIO / XIN32 reference clock input |
| Pino 2 | PA01 — PORTA GPIO / XOUT32 reference clock output |
| Pino 3 | PA02 — PORTA GPIO / ADC AIN0 / PTC Y0 |
| Pino 4 | PA03 — PORTA GPIO / ADC AIN1 / PTC Y1 |
| Pino 5 | PA04 — PORTA GPIO / VREF / ADC reference |
| Pino 6 | PA05 — PORTA GPIO / PTC Y3 |
| Pino 7 | PA06 — PORTA GPIO / PTC Y5 |
| Pino 8 | PA07 — PORTA GPIO / PTC Y7 |
| Pino 9 | PA08 — PORTA GPIO / PTC X0 / I2S SCK |
| Pino 10 | PA09 — PORTA GPIO / PTC X2 / I2S MCK |
| Pino 11 | PA10 — PORTA GPIO / PTC X4 / I2S FS |
| Pino 12 | PA11 — PORTA GPIO / PTC X6 / I2S SDO |
| Pino 13 | PA12 — PORTA GPIO / PTC X8 / I2S SDI |
| Pino 14 | PA13 — PORTA GPIO / PTC X10 |
| Pino 15 | PA14 — PORTA GPIO / PTC X12 |
| Pino 16 | PA15 — PORTA GPIO / PTC X14 / SERCOM3 PAD1 |
| Pino 17 | PA16 — PORTA GPIO / SERCOM1 PAD0 / I2C SDA |
| Pino 18 | PA17 — PORTA GPIO / SERCOM1 PAD1 / I2C SCL |
| Pino 19 | PA18 — PORTA GPIO / SERCOM3 PAD2 |
| Pino 20 | PA19 — PORTA GPIO / SERCOM3 PAD3 |
| Pino 21 | PA20 — PORTA GPIO / SERCOM5 PAD2 |
| Pino 22 | PA21 — PORTA GPIO / SERCOM5 PAD3 |
| Pino 23 | PA22 — PORTA GPIO / SERCOM3 PAD0 / I2C SDA |
| Pino 24 | PA23 — PORTA GPIO / SERCOM3 PAD1 / I2C SCL |
| Pino 25 | PA24 — PORTA GPIO / USB D- |
| Pino 26 | PA25 — PORTA GPIO / USB D+ |
| Pino 27 | PA26 — PORTA GPIO |
| Pino 28 | PA27 — PORTA GPIO |
| Pino 29 | PA28 — PORTA GPIO / RESET (after fuse) |
| Pino 30 | PA29 — PORTA GPIO |
| Pino 31 | PA30 — PORTA GPIO / SWCLK (programming) |
| Pino 32 | PA31 — PORTA GPIO / SWDIO (programming) |
| Pino 33 | PB00 — PORTB GPIO |
| Pino 34 | PB01 — PORTB GPIO |
| Pino 35 | PB02 — PORTB GPIO / SERCOM5 PAD0 |
| Pino 36 | PB03 — PORTB GPIO / SERCOM5 PAD1 |
| Pino 37 | PB04 — PORTB GPIO |
| Pino 38 | PB05 — PORTB GPIO |
| Pino 39 | PB06 — PORTB GPIO / SERCOM4 PAD0 |
| Pino 40 | PB07 — PORTB GPIO / SERCOM4 PAD1 |
| Pino 41 | PB08 — PORTB GPIO / SERCOM4 PAD2 |
| Pino 42 | PB09 — PORTB GPIO / SERCOM4 PAD3 |
| Pino 43 | PB10 — PORTB GPIO / SERCOM4 PAD2 alt |
| Pino 44 | PB11 — PORTB GPIO / SERCOM4 PAD3 alt |
| Pino 45 | PB12 — PORTB GPIO / PTC Y14 |
| Pino 46 | PB13 — PORTB GPIO / PTC Y16 |
| Pino 47 | PB14 — PORTB GPIO / PTC Y18 |
| Pino 48 | PB15 — PORTB GPIO / PTC Y20 |
| Pino 49 | EP — Exposed pad - must be soldered to GND plane for thermal and electrical reference |
Aplicações típicas
ATSAMD21G17L-MNT é adequado para 6 aplicaçãos: LED Lighting Controller with Touch Dimming, USB CDC Virtual COM-Port Bridge, Smart Home Sensor Hub, Industrial Motor Control (BLDC/PMSM), Consumer Wearable / Fitness Tracker, Home Automation Bridge / Metering.
LED Lighting Controller with Touch Dimming
The ATSAMD21G17L-MNT is purpose-built for LED lighting with integrated peripheral touch controller (PTC) eliminating the need for an external touch IC, reducing BOM by $0.50-1.00 per fixture. The 12-bit 350 ksps ADC reads ambient light sensors for daylight-compensated dimming, while TCC0/TCC1 generate up to 24-bit PWM for flicker-free color mixing and smooth dimming curves below 1% perceived brightness. Six SERCOMs handle UART control (DMX, DALI, Casambi, BLE bridge), I2C sensor expansion, and SPI LED driver daisy-chaining. At 48 MHz the Cortex-M0+ executes adaptive thermal foldback algorithms while maintaining <2 mA active current, and the L-suffix 105 C rating ensures reliability inside sealed luminaires.
Recomendado
USB CDC Virtual COM-Port Bridge
The ATSAMD21G17L-MNT's integrated USB 2.0 Full-Speed device with on-chip transceiver lets designers implement a CDC virtual COM port with zero external PHY components, just D+/D- lines, ESD diode array, and 90-ohm differential routing. The 48 MHz Cortex-M0+ handles USB protocol stack and UART-to-USB conversion at line speeds up to 1 Mbaud while leaving headroom for application firmware inside the 128 KB Flash window. Six DMA channels offload USB endpoint handling from the CPU, keeping ISR latency predictable. The 48-QFN package with exposed pad simplifies routing on 2-layer PCBs, and 1.62-3.63 V VDD lets the same firmware run from 3.3 V regulated rails or 5 V bus-powered configurations through the internal 3.3 V LDO.
Recomendado
Smart Home Sensor Hub
IoT sensor hubs benefit from the ATSAMD21G17L-MNT's six SERCOM peripherals which handle UART (Zigbee/Matter module), SPI (environmental sensors like BME680), I2C (display + RTC), and a second UART for debug. The 12-bit ADC reads analog sensors (PIR, photocell, thermistor) at 350 ksps while the integrated PTC enables wall-mount touch buttons. At deep-sleep currents of <5 uA with RTC running, the device can sustain years of battery life on 2x AA cells, and the Cortex-M0+ wakes in <2 us to service sensor interrupts through the event system without CPU polling. The 48-QFN body fits inside standard 30x30 mm sensor PCB outlines.
Recomendado
Industrial Motor Control (BLDC/PMSM)
Field-oriented control of small BLDC and PMSM motors fits comfortably inside the ATSAMD21G17L-MNT's 128 KB Flash, with the TCC0/TCC1 timers providing complementary PWM with dead-time insertion and hardware fault shutdown. The Cortex-M0+ at 48 MHz executes simplified FOC at 4-8 kHz PWM frequency while the 12-bit ADC samples phase currents through integrated PGA. The L-suffix 105 C junction rating supports under-hood industrial motor environments, and the 48-QFN package simplifies 4-layer PCB integration with high-current FET half-bridges. Designers using Sensorless FOC can rely on the BOD and WDT peripherals for safe reset behaviour.
Recomendado
Consumer Wearable / Fitness Tracker
The ATSAMD21G17L-MNT drives wearable devices by combining the integrated PTC for touch buttons (no mechanical switches required), six SERCOMs for BLE module (UART), heart-rate sensor (I2C), accelerometer (SPI), and display (SPI), plus 12-bit ADC for battery monitoring. At 48 MHz the Cortex-M0+ executes sensor fusion within <1 mA active draw, and the 1.62-3.63 V VDD range supports direct Li-ion cell operation. The 48-QFN package (7x7 mm) is compact enough for wrist-form-factor PCBs, and the 105 C operating temperature handles body-heat ambient plus charging-induced self-heating. The 16 KB SRAM is sufficient for small sensor-fusion buffers.
Recomendado
Home Automation Bridge / Metering
Smart metering applications (water, gas, electricity sub-meters) leverage the ATSAMD21G17L-MNT's Cortex-M0+ core for low-power Modbus RTU/TCP bridging, its 12-bit ADC for analog pulse-count or 4-20 mA sensor reading, and six SERCOMs for UART, RS-485 transceiver, and I2C RTC. The 128 KB Flash holds full Modbus plus TLS-lite stacks for HTTPS reporting, and 16 KB SRAM is adequate for short TCP buffers. Industrial temperature range (L-suffix 105 C) supports outdoor meter enclosures, while the 48-QFN body simplifies integration into 35 mm DIN-rail enclosure footprints. Microchip's MPLAB Harmony framework accelerates Modbus/CAN/MQTT firmware development.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAMD21G17L-MNT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATSAMD21G17L-MN | ATSAMD21G17L-MUT | ATSAMD21G18L-MNT | ATSAMD21G16L-MUT | ATSAMD21E17L-MN | ATSAMD21G17D-MU | ATSAMD21G17A-MFT |
|---|---|---|---|---|---|---|---|---|
| Package | 48-QFN (7x7 mm) with EP | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 128 KB | 128 KB | 128 KB | 256 KB | 64 KB | 128 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 32 KB | 8 KB | 16 KB | 16 KB | 16 KB |
| CPU Clock (max) | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +85C | -40C to +85C |
| Integrated USB | Yes (Full-Speed Device) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Peripheral Touch Controller | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Principais diferenciais
- Integrated peripheral touch controller eliminates external touch IC (vs STM32G031 (cross-brand, requires PCB redesign))
- Highest temperature rating in SAM D21 G-class at 105 C (L-suffix) (vs ATSAMD21G17A-MFT (85 C A-suffix))
- 256 KB Flash upgrade path without PCB change (vs ATSAMD21G18L-MNT (same 48-QFN pinout))
Notas de projeto
The ATSAMD21G17L-MNT exposes a 7x7 mm thermal pad on the bottom of the QFN package which MUST be soldered to a continuous ground plane with at least 8 thermal vias (0.3 mm drill, 0.6 mm pitch) for heat extraction. Without proper EP soldering the part will operate ~15 C hotter, potentially derating the 105 C specification. Estimated: at 48 MHz active and 1.3 mA/MHz IDD, total die dissipation is roughly 60 mW - well within QFN thermal limits when EP is soldered correctly.
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of every VDD pin (typically pins 16, 28, 40) plus a bulk 4.7 uF X5R within 5 mm. The 48-QFN land pattern requires NSMD pads with 0.4 mm pitch and 0.2-0.3 mm pad width. Keep USB D+/D- traces at 90-ohm differential impedance with no stubs longer than 0.5 mm, and route them over a continuous ground plane to satisfy USB 2.0 Full-Speed signal-integrity requirements per the SAM D21 datasheet routing guidance.
Do not connect the RESET pin (PA28 by default) directly to VDD - always include a 10 kOhm pull-up and a 1 nF capacitor to ground for noise immunity, or use the internal pull-up via NVM fuse. Avoid enabling the USB peripheral before configuring the GCLK_USB; incorrect GCLK settings cause enumeration failures that look like hardware faults. The PTC touch controller needs calibration per Microchip ASF touch library to avoid false triggers in noisy environments - do not skip calibration even in production.
When running from a single Li-ion cell (3.0-4.2 V), use the internal 3.3 V regulator to derive VDD from VDDIN. When running from a regulated 3.3 V supply, VDDIN can be tied directly to VDD but the regulator must be disabled via SUPC->VREG.bit.ENABLE to save quiescent current. In deep-sleep with RTC, total quiescent current drops below 5 uA - sufficient for years of battery life on a CR2032 in sensor applications.
Informações de conformidade
RoHS and GREEN compliant per Microchip product page. MNT suffix denotes matte-tin lead-free finish. Not AEC-Q100 qualified - automotive applications require ATSAMD21G17D-MU (D = automotive grade) or ATSAMD21G17L-MNT for industrial only.
