ATSAMC21E17A-ANT - 48MHz Cortex-M0+ MCU, 128KB Flash, 32-TQFP
N.º da peça: ATSAMC21E17A-ANT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.74 | $3,74 |
| 10 | $3.45 | $34,50 |
| 100 | $2.99 | $299,00 |
| 500 | $2.68 | $1.340,00 |
| 1.000 | $2.41 | $2.410,00 |
ATSAMC21E17A-ANT Visão geral
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core designed by ARM Holdings for embedded applications where low power consumption, deterministic interrupt handling, and a small silicon footprint are critical. The Cortex-M0+ sits at the low end of the Cortex-M hierarchy and uses the Thumb-2 instruction set; it is widely used in automotive body, sensor, and HMI subsystems as well as in industrial control and IoT edge nodes. The part belongs to the broader category of microcontrollers (MCUs), which integrate CPU core, program memory, data memory, and peripherals into a single chip.
Key features of the ATSAMC21E17A-ANT include six SERCOM channels that can each be configured as UART, SPI, or I2C, a CAN-FD controller for high-bandwidth in-vehicle networking, a 12-bit 1 Msps ADC with up to 16 channels, a 10-bit DAC, and the Peripheral Touch Controller supporting capacitive-touch key, slider, and wheel sensing. The device also integrates a 32-bit real-time counter, a watchdog timer, multiple sleep modes, and a single-cycle hardware multiplier for efficient DSP-like operations.
Architecturally, the ATSAMC21E17A-ANT uses the Cortex-M0+ core paired with a multi-layer AHB/APB bus matrix that lets DMA-driven peripheral traffic run concurrently with CPU execution. The flash subsystem uses an embedded 128 KB NVM with hardware ECC, and the SRAM includes parity checking for functional-safety diagnostics. An integrated 5 V-tolerant I/O ring allows direct interfacing with legacy industrial transceivers without external level shifters.
Typical applications include automotive body and comfort modules using CAN-FD, industrial sensor hubs and PLC I/O, capacitive-touch human-machine interfaces, building automation controllers, and battery-powered IoT edge nodes that benefit from the low-power sleep modes and the 5 V-tolerant I/O. The wide 5 V tolerance also makes the part attractive for retrofit designs that must coexist with 3.3 V MCUs and 5 V transceivers on the same board.
When designing with this part, ensure the 32-pin TQFP land pattern is used and that the EIC, SERCOM, and ADC routing requirements from the datasheet are followed to avoid signal-integrity issues on the analog inputs. The AEC-Q100 Grade 1 qualification allows direct use in cabin and under-hood automotive subsystems without additional derating. For designs targeting lower flash densities or smaller packages, the same SAM C21 family provides compatible pinouts at 32-, 48-, and 64-pin TQFP variants.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including recommendations for cross-brand MCUs from STMicroelectronics and NXP that offer comparable functionality in the same 32-pin TQFP footprint.
Alternativas drop-in para ATSAMC21E17A-ANT — 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 ATSAMC21E17A-ANT (mesmo formato e footprint) — diferindo em Package, ADC, RoHS Status, SRAM, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAMC21E16A-AUT
✅ Drop-In✓ Em estoque
$2.78 / unidade
Ver ficha técnica →ATSAMC20E18A-MUT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$1.92 / unidade
Ver ficha técnica →ATSAMC20E17A-MNT
✅ Drop-In✓ Em estoque
$2.43 / unidade
Ver ficha técnica →ATSAMC21N17A-ANT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMC21E17A-AUT
✅ Drop-In✓ Em estoque
$2.45 / unidade
Ver ficha técnica →STM32G031K8T6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAMC21E17A-ANT Classificações máximas e características elétricas
| Core | ARM Cortex-M0+ |
| Bit Width | 32-bit |
| Frequência máxima de clock | 48 MHz |
| Program Memory (Flash) | 128 KB |
| SRAM | 16 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| DAC | 10-bit |
| CAN | CAN-FD |
| SERCOM | Up to 6 (each configurable as UART / SPI / I2C) |
| Peripheral Touch Controller | Yes (PTC, supporting capacitive touch) |
| Faixa de temperatura de operação | -40 °C to +125 °C |
| Encapsulamento | 32-pin TQFP (7x7 mm) |
| AEC-Q100 Grade | Grade 1 |
| Functional Safety | Yes (FuSa) |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Lead-Free | Yes |
Configuração de pinos do ATSAMC21E17A-ANT
| Pino 1 | PA02/AIN0 — General IO / ADC input channel 0 |
| Pino 2 | PA03/AREF — Analog reference voltage pin / general IO |
| Pino 3 | GND — Ground reference |
| Pino 4 | VDDIO — Digital IO supply voltage |
| Pino 5 | VDD — Core supply voltage |
| Pino 6 | PA04 — General IO |
| Pino 7 | PA05 — General IO |
| Pino 8 | PA06 — General IO |
| Pino 9 | PA07 — General IO |
| Pino 10 | PA08 — General IO |
| Pino 11 | PA09 — General IO |
| Pino 12 | PA10 — General IO |
| Pino 13 | PA11 — General IO |
| Pino 14 | PA12 — General IO |
| Pino 15 | PA13 — General IO |
| Pino 16 | PA14 — General IO |
| Pino 17 | PA15 — General IO |
| Pino 18 | PA16 — General IO |
| Pino 19 | PA17 — General IO / SERCOM |
| Pino 20 | PA18 — General IO |
| Pino 21 | PA19 — General IO |
| Pino 22 | PA20 — General IO |
| Pino 23 | PA21 — General IO |
| Pino 24 | PA22 — General IO |
| Pino 25 | PA23 — General IO |
| Pino 26 | PA24 — General IO |
| Pino 27 | PA25 — General IO |
| Pino 28 | PA27 — General IO |
| Pino 29 | VDDIO — Digital IO supply voltage |
| Pino 30 | GND — Ground reference |
| Pino 31 | RESET — Reset input (active low) |
| Pino 32 | SWDIO — SWD debug data |
Aplicações típicas
ATSAMC21E17A-ANT é adequado para 6 aplicaçãos: Automotive Body and Comfort Modules, Industrial Sensor Hubs and PLC I/O, Capacitive-Touch HMI Panels, Building Automation Controllers, IoT Edge Nodes with Field Bus Connectivity, Industrial AC Motor Driver BLDC Commutator.
Automotive Body and Comfort Modules
The ATSAMC21E17A-ANT powers automotive body controllers for door modules, seat controllers, and HVAC controls where its AEC-Q100 Grade 1 qualification, 5 V-tolerant I/O, and 48 MHz Cortex-M0+ performance provide the right balance of cost and robustness. Its integrated CAN-FD controller allows seamless connection to vehicle networks at up to 1 Mbit/s, reducing bus utilization for diagnostics and reflash traffic. The device's 128 KB Flash accommodates typical body-control firmware plus CANopen or UDS stacks, while the 16 KB SRAM handles real-time scheduling buffers. Engineers place the part near the CAN bus transceiver and tie its VDDIO rail directly to a 5 V regulated supply, eliminating external level shifters that designers of conventional 3.3 V MCUs must add.
Recomendado
Industrial Sensor Hubs and PLC I/O
The ATSAMC21E17A-ANT serves as the compute element in industrial sensor hubs and PLC I/O modules that aggregate 4-20 mA, digital IO, and field-bus data into a host controller. Its six SERCOM ports, each configurable as UART, SPI, or I2C, simplify multi-sensor interfacing without external glue logic, while the 12-bit ADC with hardware sequencer handles analog inputs directly. The 5 V tolerance means digital IO survives the full 24 V industrial bus voltage range with resistive dividers and TVS protection. The AEC-Q100 Grade 1 over-temperature range makes the module reliable in factory-floor enclosures where ambient temperatures easily reach 85 °C. Pair the part with a 5 V LDO such as the LM317 to deliver clean VDD, and use external TVS diodes on each industrial bus pin for surge protection.
Recomendado
Capacitive-Touch HMI Panels
The ATSAMC21E17A-ANT drives 32-key or slider capacitive-touch human-machine interfaces in appliances, building automation, and industrial controls. Its integrated Peripheral Touch Controller offloads charge-sharing scans from the CPU, consuming under 5 µA in deep-sleep and enabling wake-on-touch operation from a coin cell. Designers pair the part with a self-capacitance or mutual-capacitance overlay PCB, route the PTC lines with guard traces, and connect the CAN-FD peripheral for upstream communication with the building controller. The MCU's 128 KB Flash supports a full QTouch library plus custom UI logic, while the SERCOM peripherals handle display SPI and audio feedback. Compared with external touch controllers, this integrated solution reduces BOM cost and PCB area.
Recomendado
Building Automation Controllers
The ATSAMC21E17A-ANT operates building automation controllers that drive lighting, blinds, and HVAC actuators through wired or wireless networks. Its 48 MHz Cortex-M0+ core combined with the 12-bit ADC handles sensor data and run-time control loops, while its 5 V-tolerant IO links directly to legacy industrial transceivers found in building installations without external level shifters. The integrated CAN-FD controller is well suited to BACnet over CAN or Honeywell-style proprietary BMS wiring, making the part a useful upgrade from older 8051-based designs. Designers build dual-MCU systems with a main ARM host plus this C21 peripheral MCU that aggregates sensor data and drives relay matrices. The AEC-Q100 Grade 1 qualification provides headroom for installation environments subject to wide temperature swings.
Recomendado
IoT Edge Nodes with Field Bus Connectivity
The ATSAMC21E17A-ANT anchors IoT edge nodes that bridge legacy industrial sensors to cloud networks using MQTT over Wi-Fi or LTE-M modules. Its six SERCOM ports multiplex SPI to a wireless module, UART to a GPS receiver, and I2C to a temperature sensor, while the CAN-FD controller gathers data from upstream industrial devices. The 5 V tolerance is particularly important when the edge node must interface with installed 24 V industrial bus hardware through resistive dividers. Low-power sleep modes below 5 µA and wake-on-touch or RTC wake sources allow battery-powered installations to last multiple years on a single pack. The MCU executes TLS 1.2 cryptographic stacks for cloud authentication in 128 KB Flash with spare room for OTA update buffers.
Recomendado
Industrial AC Motor Driver BLDC Commutator
The ATSAMC21E17A-ANT executes brushless DC motor commutation in small industrial drives such as fans, pumps, and conveyor rollers. Its 48 MHz Cortex-M0+ core sustains trapezoidal and field-oriented control loops within tens of microseconds, while its 12-bit ADC samples phase currents synchronously with the PWM module. The 5 V tolerance allows direct connection to 5 V Hall-effect position sensors without external comparators, and the wide operating temperature range supports under-cabinet installations where ambient temperatures easily climb above 70 °C. The CAN-FD peripheral exposes drive telemetry to upstream PLCs or HMIs without adding a dedicated gateway. Engineers typically pair the MCU with gate drivers like the MCP8025 or TC78B027 for trapezoidal control of low-power BLDC motors up to several hundred watts.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAMC21E17A-ANT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ATSAMC21E16A-AUT | ATSAMC20E18A-MUT | ATSAMC20E17A-MNT | ATSAMC21N17A-ANT | ATSAMC21E17A-AUT | STM32G031K8T6 |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) | QFP (TQFP family) | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) |
| Core / Frequency | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 48 MHz | Cortex-M0+ / 64 MHz |
| Flash Memory | 128 KB | 64 KB | 256 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| SRAM | 16 KB | 16 KB | 32 KB | 16 KB | 16 KB | 16 KB | 8 KB |
| CAN-FD | Yes | Yes | No (CAN 2.0B only) | No (CAN 2.0B only) | Yes | Yes | No |
| Peripheral Touch Controller | Yes | Yes | No | No | Yes | Yes | No |
| Operating Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.0 V to 3.6 V |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Grade 1 | Not AEC-Q100 |
| Approx. Unit Price (1 pc) | $3.74 | lower cost | similar | similar | similar | similar | lower cost |
Principais diferenciais
- 5 V-tolerant I/O eliminates external level shifters vs typical 3.3 V MCUs (vs STM32G031K8T6)
- Higher Flash density for firmware-heavy automotive nodes (vs ATSAMC21E16A-AUT)
- Better automotive grade and CAN-FD vs industrial-grade predecessors (vs ATSAMC20E17A-MNT)
Notas de projeto
The ATSAMC21E17A-ANT integrates a 5 V to 1.2 V core LDO that draws directly from VDD. Place a 1 µF X7R decoupling capacitor at the VDD pin and a 100 nF at every VDDIO pin to suppress switching transients from the SERCOM, CAN-FD, and ADC blocks. Estimated: with 4 active SERCOMs and CAN-FD at 500 kbit/s, the core LDO dissipates roughly 60 mW at 5 V VDDIO with 48 MHz clock, leaving a thermal margin of more than 100 °C in the 32-TQFP package. Always operate the part within the datasheet VDD slope (max 1 V/µs) and respect VDDIO ≥ VDD at all times during power sequencing.
Estimated: at the 48 MHz maximum clock with all six SERCOMs active and CAN-FD running at 1 Mbit/s, the 32-TQFP (7x7 mm) dissipates approximately 90 mW of core power. The package's θJA of about 39 °C/W (per JEDEC EIA/JESD51-2 still-air PCB conditions) implies a junction-to-ambient temperature rise of only 3.5 °C above room temperature, well inside the AEC-Q100 Grade 1 -40 °C to +125 °C operating window. When mounting the part on a small two-layer board, ensure the center copper pour is at least 200 mm² to keep the junction below 100 °C in industrial cabinet installations.
Place the 32-TQFP decoupling capacitors as close as possible to the VDD and VDDIO pins, ideally within 100 mils. Add a ground guard ring around each ADC input trace to reduce digital-noise coupling into the analog channels, and route the CAN-H/CAN-L differential pair in a matched 100 Ω impedance matched length under 100 mm to keep reflections under CAN-FD timing tolerance. Use PCB microstrip or stripline for the SWDIO/SWDCLK debug signals and avoid routing them over the analog inputs to prevent coupling. Mirror the package-datasheet land pattern (IPC-7351 nominal density) and add NSMD pads for 8-mil trace plus 8-mil space to support hand rework.
When designing with the ATSAMC21E17A-ANT's CAN-FD controller, ensure the CAN bus termination is 120 Ω on each end of the segment and that stub lengths stay below 30 mm to avoid reflections above 1 Mbit/s. The CAN-FD controller expects a transceiver with TXD dominant timeout such as the MCP2562FD, so do not use legacy MCP2551 transceivers that lack this protection. For SERCOM SPI, keep the SCK trace under 50 mm and place a 33 Ω series resistor at the SCK driver if the bus runs above 20 MHz to dampen ringing.
Avoid using early ATSAM C20 silicon revisions if your design depends on CAN-FD - the C20 family supports only CAN 2.0B and reports an error if CAN-FD frames are sent. Do not exceed the 5.5 V absolute maximum on VDDIO, even during hot-plug events; add a TVS diode such as SMBJ5.0CA across VDDIO to ground. Leave the bootloader fuse at the datasheet default unless you have a validated programming path, because erasing it without a backup loader can brick the device. The 32-TQFP 32-pin package shares its peripheral mapping with the 32-pin SAM D20/D21, but pin multiplexing for SERCOM3 differs at two positions, so always re-validate multiplexing in Atmel START before finalizing the BOM.
Informações de conformidade
RoHS compliant per Microchip product page; AEC-Q100 Grade 1 qualification confirmed for the SAM C21 family; lead-free and halogen-free as required by Microchip automotive grade packaging; conflict-minerals reporting compliant per Microchip supplier statement.
