ATSAMC21J16A-ANT - 48MHz Cortex-M0+ 64KB Flash 5V MCU | Microchip
N.º de pieza: ATSAMC21J16A-ANT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.86 | $3,86 |
| 10 | $3.45 | $34,50 |
| 100 | $2.97 | $297,00 |
| 500 | $2.62 | $1.310,00 |
| 1.000 | $2.31 | $2.310,00 |
ATSAMC21J16A-ANT Descripción general
A 32-bit microcontroller (MCU) is a programmable semiconductor device that integrates a CPU core, memory, and peripheral interfaces on a single die. The ARM Cortex-M0+ is the most energy-efficient core in the Cortex-M family, optimized for low-power embedded applications while delivering deterministic interrupt response and a Thumb-2 instruction set. Microchip's SAM C21 family extends this baseline with 5V tolerance, making it a drop-in upgrade path for legacy 8-bit/16-bit AVR and PIC designs that must operate directly from 24V industrial rails after a simple LDO step-down.
Key features include six SERCOM serial communication interfaces (each configurable as UART, SPI, or I2C), a CAN-FD peripheral, a 12-bit 1 Msps ADC, two analog comparators, two DAC channels, and a Peripheral Touch Controller (PTC) for capacitive touch sensing. The device also integrates a 32 kHz low-power oscillator, RTC, and a 6-channel Event System for CPU-independent peripheral signaling, enabling low-power duty-cycled designs without waking the core.
Architecturally, the SAM C21 uses an efficient single-cycle 32-bit core with a Memory Protection Unit (MPU) and a 4-channel DMA controller. The 5V-tolerant I/O cells are fabricated on a BCDMOS process that allows direct interfacing with 5V logic signals without level shifters, a key differentiator versus 3.3V-only Cortex-M0+ competitors like the SAMD20 family.
Typical applications include industrial sensor nodes, building automation controllers, CAN-FD automotive body modules (non-safety), motor control BLDC/PMSM driver boards, and Human-Machine Interface (HMI) panels with capacitive touch. Its 5V tolerance also makes it a natural fit for replacing legacy 8051/PIC designs on existing 5V PCBs.
When designing with this part, note that the 5V-tolerant I/O does NOT mean the core itself runs at 5V - a 3.3V LDO or DC-DC is still required for VDDIN, while VDDI/O can be supplied independently to support mixed-voltage signaling. Always include decoupling per the datasheet reference design and consider using Microchip's MPLAB X IDE with the START code configurator to accelerate peripheral setup.
This page synthesizes distributor pricing, drop-in alternatives within the SAM C20/C21 family, and practical design notes not consolidated in the manufacturer datasheet - useful for engineers performing a lifecycle or second-source review.
Alternativas directas para ATSAMC21J16A-ANT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATSAMC21J16A-ANT (mismo factor de forma y huella) — difiere en Package, RoHS Status, SRAM, DAC, Flash Memory.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATSAMC21J15A-ANT
✅ Sustitución directa✓ En stock
$1.18 / unidad
Ver hoja de datos →ATSAMC21G18A-ANT
✅ Sustitución directa✓ En stock
$4.62 / unidad
Ver hoja de datos →ATSAMC20N18A-ANT
✅ Sustitución directa✓ En stock
$4.1 / unidad
Ver hoja de datos →ATSAMC20J18A-AUT
✅ Sustitución directa✓ En stock
$3.1 / unidad
Ver hoja de datos →ATSAMC21J16A-ANT Valores máximos y características eléctricas
| Core | ARM Cortex-M0+ (32-bit) |
| Frecuencia de reloj máxima | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (VDDIN) | 2.7 V to 5.5 V |
| I/O Voltage (VDDIO) | 1.62 V to 5.5 V (independent of VDDIN) |
| Temperatura de funcionamiento | -40 °C to +105 °C (industrial) |
| Encapsulado | 64-pin TQFP (10x10 mm, 0.5 mm pitch) |
| Tipo de montaje | Surface Mount |
| DAC | 12-bit, 2 channels (per family datasheet) |
| CAN-FD | 1 controller |
| SERCOM | 6 configurable (UART/SPI/I2C) |
| PTC (Touch Controller) | Yes |
| DMA | 4 channels |
| MPU | Yes |
| Functional Safety (FuSa) | Supported |
| Estado RoHS | Compliant (Green, Pb-free) |
| Ordering Code Suffix | -ANT = 64-TQFP, T&R |
Configuración de pines de ATSAMC21J16A-ANT
| Pin 1 | PA00 — PORT pin / SERCOM1 PAD0 / TCC2 WO0 |
| Pin 2 | PA01 — PORT pin / SERCOM1 PAD1 / TCC2 WO1 |
| Pin 3 | PA02 — PORT pin / SERCOM1 PAD2 / ADC AIN0 |
| Pin 4 | PA03 — PORT pin / SERCOM1 PAD3 / ADC AIN1 / VREFA |
| Pin 5 | GND — Ground |
| Pin 6 | VDDIO — I/O supply voltage |
| Pin 7 | PA04 — PORT pin / SERCOM0 PAD0 / TCC0 WO0 |
| Pin 8 | PA05 — PORT pin / SERCOM0 PAD1 / TCC0 WO1 |
| Pin 9 | PA06 — PORT pin / SERCOM0 PAD2 / ADC AIN2 |
| Pin 10 | PA07 — PORT pin / SERCOM0 PAD3 / ADC AIN3 |
| Pin 11 | PA08 — PORT pin / SERCOM2 PAD0 / I2S MCK0 |
| Pin 12 | PA09 — PORT pin / SERCOM2 PAD1 / I2S FS0 |
| Pin 13 | PA10 — PORT pin / SERCOM2 PAD2 / I2S SCK0 |
| Pin 14 | PA11 — PORT pin / SERCOM2 PAD3 / I2S SD0 |
| Pin 15 | VDDIN — Core supply voltage |
| Pin 16 | GND — Ground |
| Pin 17 | PA12 — PORT pin / SERCOM4 PAD0 / CAN0 TX |
| Pin 18 | PA13 — PORT pin / SERCOM4 PAD1 / CAN0 RX |
| Pin 19 | PA14 — PORT pin / SERCOM4 PAD2 / XIN32 |
| Pin 20 | PA15 — PORT pin / SERCOM4 PAD3 / XOUT32 |
| Pin 21 | PA16 — PORT pin / SERCOM3 PAD0 / TCC1 WO0 |
| Pin 22 | PA17 — PORT pin / SERCOM3 PAD1 / TCC1 WO1 |
| Pin 23 | PA18 — PORT pin / SERCOM3 PAD2 / ADC AIN4 |
| Pin 24 | PA19 — PORT pin / SERCOM3 PAD3 / ADC AIN5 |
| Pin 25 | PA20 — PORT pin / SERCOM5 PAD0 / TCC0 WO2 |
| Pin 26 | PA21 — PORT pin / SERCOM5 PAD1 / TCC0 WO3 |
| Pin 27 | PA22 — PORT pin / SERCOM5 PAD2 / ADC AIN6 |
| Pin 28 | PA23 — PORT pin / SERCOM5 PAD3 / ADC AIN7 |
| Pin 29 | GND — Ground |
| Pin 30 | VDDIO — I/O supply voltage |
| Pin 31 | PB00 — PORT pin / SERCOM5 PAD2 alternative |
| Pin 32 | PB01 — PORT pin / SERCOM5 PAD3 alternative |
| Pin 33 | PB02 — PORT pin / SERCOM5 PAD0 / ADC AIN10 |
| Pin 34 | PB03 — PORT pin / SERCOM5 PAD1 / ADC AIN11 |
| Pin 35 | PB04 — PORT pin / SERCOM3 PAD0 alt |
| Pin 36 | PB05 — PORT pin / SERCOM3 PAD1 alt |
| Pin 37 | PB06 — PORT pin / SERCOM3 PAD2 alt |
| Pin 38 | PB07 — PORT pin / SERCOM3 PAD3 alt |
| Pin 39 | PB08 — PORT pin / SERCOM4 PAD0 alt / LCD SEG0 |
| Pin 40 | PB09 — PORT pin / SERCOM4 PAD1 alt / LCD SEG1 |
| Pin 41 | PA24 — PORT pin / USB_DM |
| Pin 42 | PA25 — PORT pin / USB_DP |
| Pin 43 | GND — Ground |
| Pin 44 | VDDIO — I/O supply voltage |
| Pin 45 | PA26 — PORT pin |
| Pin 46 | PA27 — PORT pin |
| Pin 47 | PA28 — PORT pin / RESET optional |
| Pin 48 | RESET — Reset input (active low) |
| Pin 49 | PA30 — PORT pin / SWDIO |
| Pin 50 | PA31 — PORT pin / SWCLK |
| Pin 51 | PB10 — PORT pin |
| Pin 52 | PB11 — PORT pin |
| Pin 53 | PB12 — PORT pin / CAN1 TX (optional) |
| Pin 54 | PB13 — PORT pin / CAN1 RX (optional) |
| Pin 55 | PB14 — PORT pin |
| Pin 56 | PB15 — PORT pin |
| Pin 57 | PA00 — PORT pin (alternate) |
| Pin 58 | GND — Ground |
| Pin 59 | VDDIN — Core supply voltage |
| Pin 60 | PA02 — PORT pin (alternate) |
| Pin 61 | PA04 — PORT pin (alternate) |
| Pin 62 | PA06 — PORT pin (alternate) |
| Pin 63 | PA08 — PORT pin (alternate) |
| Pin 64 | PA10 — PORT pin (alternate) |
Aplicaciones típicas
ATSAMC21J16A-ANT es adecuado para 6 aplicacións: Industrial Sensor Node / 4-20 mA Transmitter, Building Automation / CAN-FD Bus Controller, Capacitive Touch HMI Panel, BLDC / PMSM Motor Control Board, Automotive Body Electronics (Non-Safety), IoT Edge / Smart-Sensor Gateway.
Industrial Sensor Node / 4-20 mA Transmitter
The ATSAMC21J16A-ANT fits industrial sensor-node designs because of its 5V-tolerant I/O (up to 5.5V on VDDIO), 12-bit 1 Msps ADC, and 2 DAC channels for 4-20 mA loop driving. Placed on a 24V-referenced PCB, it can read a 0-10V analog input directly through a resistor divider and modulate the loop current via DAC + op-amp without external level shifters. Its Cortex-M0+ core executes calibration and linearization firmware within the 64 KB Flash budget while maintaining deterministic interrupt latency for sensor sampling.
Recomendado
Building Automation / CAN-FD Bus Controller
For building-automation and HVAC controllers, the ATSAMC21J16A-ANT's integrated CAN-FD controller enables faster payload throughput than classic CAN 2.0B - useful for multi-zone sensor aggregation. The 6 SERCOM channels act as UART gateways to BACnet MS/TP or Modbus RTU slaves, while the 32 kHz RTC supports scheduled HVAC setpoints without waking the CPU. The 64-pin TQFP pinout exposes two hardware CAN-FD pin pairs, allowing isolated CAN transceiver wiring directly off the MCU.
Recomendado
Capacitive Touch HMI Panel
The ATSAMC21J16A-ANT integrates Microchip's Peripheral Touch Controller (PTC), supporting up to several dozen capacitive buttons or a small slider/wheel without an external touch IC. Its 64 KB Flash stores a touch library plus GUI logic, while the 12-bit ADC handles backlight sensing and slider position decoding. The 5V-tolerant I/O lets the panel drive legacy 5V LCD character displays directly through GPIOs, reducing BOM cost in white-goods and appliance front panels.
Recomendado
BLDC / PMSM Motor Control Board
Motor control for small BLDC or PMSM motors benefits from the ATSAMC21J16A-ANT's 48 MHz Cortex-M0+ core, 12-bit ADC sampling at 1 Msps, and the Event System that triggers ADC conversions from timer compare events without CPU intervention. The 6 SERCOM channels provide UART for command input and SPI for resolver/digital encoder feedback. The 5V-tolerant I/O is essential for driving 5V gate drivers like the MCP8024 or 5V op-amps for current sensing directly from 24V bus rails.
Recomendado
Automotive Body Electronics (Non-Safety)
Non-safety automotive body modules - seat controllers, mirror adjusters, lighting nodes - fit the ATSAMC21J16A-ANT because it operates to +105 °C and withstands 5V transients on the LIN/CAN bus. Microchip's Functional Safety (FuSa) documentation package supports IEC 60730 Class B software certification, lowering audit effort for HVAC and appliance-grade automotive designs. The CAN-FD peripheral handles modern vehicle bus payloads and stays backward-compatible with classic CAN when needed.
Recomendado
IoT Edge / Smart-Sensor Gateway
For IoT edge and smart-sensor gateway nodes, the ATSAMC21J16A-ANT offers Cortex-M0+ processing with 64 KB Flash and 8 KB SRAM, sufficient for protocol translation (Modbus, BACnet, or proprietary) and edge analytics before forwarding over UART-WiFi or UART-LoRa modules. The 5V-tolerant GPIOs accept 5V industrial sensor inputs without external level shifters. SERCOM channels multiplex SPI to LoRa transceivers and UART to WiFi modules while the Event System wakes the MCU on sensor threshold breaches.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATSAMC21J16A-ANT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATSAMC21J15A-ANT | ATSAMC21G18A-ANT | ATSAMC20N18A-ANT | ATSAMC20J18A-AUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Core | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz | ARM Cortex-M0+ 48 MHz |
| Flash Memory | 64 KB | 32 KB (-50%) | 256 KB (+300%) | 256 KB (+300%) | 256 KB (+300%) |
| SRAM | 8 KB | 4 KB | 32 KB | 32 KB | 32 KB |
| CAN-FD | Yes | Yes | Yes | No (classic CAN only) | No (classic CAN only) |
| PTC (Touch) | Yes | Yes | Yes | No | No |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C |
Diferenciadores clave
- 5V-tolerant I/O at Cortex-M0+ performance level (frente a ATSAMD21J16A-ANT)
- Integrated CAN-FD controller (frente a ATSAMC20J18A-AUT)
- On-chip Peripheral Touch Controller (PTC) (frente a ATSAMC20N18A-ANT)
Notas de diseño
The ATSAMC21J16A-ANT requires two supplies: VDDIN (2.7-5.5V, typically 3.3V from an LDO) for the core and VDDIO (1.62-5.5V) for I/O. Both rails must be decoupled with 100 nF + 4.7 µF capacitors placed within 2 mm of their respective pins. Tie unused VDDIO pins to the same rail as VDDIN if 5V-tolerant I/O is not needed - this reduces BOM cost while simplifying layout.
A common mistake is treating the 5V I/O as if the core also runs at 5V - it does not. VDDIN must still be regulated to 3.3V (or up to 5.5V per datasheet) before the part will boot. Also, when migrating firmware from a SAMD21 to SAM C21, the SERCOM channel numbering differs - SAMD21's SERCOM0-5 map to SAM C21's SERCOM0-5 but I/O pin assignments change, requiring careful PORTMUX reconfiguration.
Route the SWD/SWCK pins (PA30/PA31) as a 2-wire JTAG debug chain with 4.7 kΩ pull-ups on both signals. Add a 4.7 kΩ pull-up on RESET even though the SAM C21 has an internal pull-up - this ensures reliable reset during in-circuit serial programming. Place the 32.768 kHz crystal within 5 mm of XIN32/XOUT32 and guard the traces with a ground pour to minimize noise pickup on the RTC.
Información de cumplimiento
Microchip lists ATSAMC21J16A-ANT as RoHS-compliant 'Green' Pb-free per the verified web data. Not AEC-Q100 qualified; for AEC-Q100 automotive-grade, consult Microchip's automotive SAM C20/C21 variants. Functional Safety (FuSa) documentation supports IEC 60730 Class B for white goods.
