ATSAMD20J16A-MU - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
N.º de pieza: ATSAMD20J16A-MU ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.1 | $4,10 |
| 10 | $3.72 | $37,20 |
| 100 | $3.18 | $318,00 |
| 500 | $2.76 | $1.380,00 |
| 1.000 | $2.45 | $2.450,00 |
ATSAMD20J16A-MU Descripción general
A microcontroller (MCU) is a single-chip computer that combines a CPU core, RAM, non-volatile program memory (Flash), and a rich set of digital and analog peripherals. The Cortex-M0+ is the most energy-efficient ARM core, designed for deterministic embedded workloads. Within the broader hierarchy, the ATSAMD20J16A-MU is a microcontroller -> 32-bit MCU -> ARM Cortex-M0+ MCU -> SAM D20 family -> low-power family -> semiconductor IC.
Key features include the Cortex-M0+ core reaching 2.14 CoreMark/MHz, 64 KB Flash plus 8 KB SRAM, an integrated SERCOM (Serial Communication Interface) block that can be configured as UART/SPI/I2C, a 12-bit ADC, 10-bit DAC, and full-speed USB 2.0 device support on selected variants. The SAM D20J also embeds the Microchip Sleepwalking peripheral event system and an Event System for low-power autonomous peripherals.
Architecturally, the SAM D20 family pairs the Cortex-M0+ core with a low-leakage process and a flexible clock tree (internal 48 MHz DFLL, 32.768 kHz oscillator, PLL options). The peripheral event system allows DMA-style data movement without CPU intervention, enabling sleep-mode current consumption in the microamp range while still sampling sensors and toggling I/O.
Typical applications include home automation nodes, low-power wireless sensor hubs, consumer human-interface devices (HID), industrial metering, smart LED controllers, and small graphical HMI panels. The wide 1.62-3.6 V supply range supports direct operation from a single Li-ion cell or two AA batteries.
Design consideration: when migrating code from ATSAM to other Cortex-M0+ MCUs, verify pin mapping and SERCOM channel allocation - SERCOM instances are multiplexed and must be remapped through the PORT MUX registers. Always consult the device-specific datasheet for pad configuration.
This page synthesizes real-time distributor pricing, pin-compatible drop-in alternatives from the same SAM D20J family, and practical low-power design notes beyond what is collected on DigiKey, Mouser, or Octopart.
Alternativas directas para ATSAMD20J16A-MU — 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 ATSAMD20J16A-MU (mismo factor de forma y huella) — difiere en Package, Operating Temperature, Program Memory (Flash), SRAM, RoHS Status.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATSAMD20J18A-MU
✅ Sustitución directa✓ En stock
$2.69 / unidad
Ver hoja de datos →ATSAMD20J15A-MU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATSAMD20J14B-MU
✅ Sustitución directa✓ En stock
$2.05 / unidad
Ver hoja de datos →ATSAMD21J18A-MU
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATSAMC20J18A-MUT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.3 / unidad
Ver hoja de datos →ATSAMD11D14A-MUT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATSAMD20J16A-MU Valores máximos y características eléctricas
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark Performance | 2.14 CoreMark/MHz |
| Program Flash | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Supply Voltage (Vdd) | 1.62 V to 3.6 V |
| Encapsulado | 64-QFN (9x9 mm) with Exposed Pad |
| Temperatura de funcionamiento | -40C to +85C (Industrial) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit, 1 MSPS |
| Communication Interfaces | SERCOM (UART/SPI/I2C) x6, I2S, USB 2.0 FS Device |
| Timers | TC (16-bit) x3, TCC (24-bit) x1, RTC x1 |
| Touch Support | QTouch/PTC peripheral |
| Estado RoHS | Compliant |
| Nivel MSL | 3 (168 hours) |
| Tipo de montaje | Surface Mount |
| Series | SAM D20J |
Configuración de pines de ATSAMD20J16A-MU
| Pin 1 | PA00 — Port A GPIO 0 (XIN) |
| Pin 2 | PA01 — Port A GPIO 1 (XOUT) |
| Pin 3 | PA02 — Port A GPIO 2 (ADC AIN0) |
| Pin 4 | PA03 — Port A GPIO 3 (ADC AIN1, VREFA) |
| Pin 5 | PA04 — Port A GPIO 4 (ADC AIN2, VREFB) |
| Pin 6 | PA05 — Port A GPIO 5 (ADC AIN3) |
| Pin 7 | PA06 — Port A GPIO 6 (ADC AIN4) |
| Pin 8 | PA07 — Port A GPIO 7 (ADC AIN5) |
| Pin 9 | PA08 — Port A GPIO 8 (ADC AIN6) |
| Pin 10 | PA09 — Port A GPIO 9 (ADC AIN7) |
| Pin 11 | PA10 — Port A GPIO 10 (ADC AIN8) |
| Pin 12 | PA11 — Port A GPIO 11 (ADC AIN9) |
| Pin 13 | VDDIO — I/O supply voltage |
| Pin 14 | GND — Ground |
| Pin 15 | PA12 — Port A GPIO 12 |
| Pin 16 | PA13 — Port A GPIO 13 |
| Pin 17 | PA14 — Port A GPIO 14 |
| Pin 18 | PA15 — Port A GPIO 15 |
| Pin 19 | PA16 — Port A GPIO 16 |
| Pin 20 | PA17 — Port A GPIO 17 |
| Pin 21 | PA18 — Port A GPIO 18 |
| Pin 22 | PA19 — Port A GPIO 19 |
| Pin 23 | PA20 — Port A GPIO 20 |
| Pin 24 | PA21 — Port A GPIO 21 |
| Pin 25 | PA22 — Port A GPIO 22 |
| Pin 26 | PA23 — Port A GPIO 23 |
| Pin 27 | PA24 — Port A GPIO 24 (USB D-) |
| Pin 28 | PA25 — Port A GPIO 25 (USB D+) |
| Pin 29 | GND — Ground |
| Pin 30 | VDDIO — I/O supply voltage |
| Pin 31 | PA26 — Port A GPIO 26 |
| Pin 32 | PA27 — Port A GPIO 27 |
| Pin 33 | PA28 — Port A GPIO 28 |
| Pin 34 | PA29 — Port A GPIO 29 |
| Pin 35 | PA30 — Port A GPIO 30 (SWCLK) |
| Pin 36 | PA31 — Port A GPIO 31 (SWDIO) |
| Pin 37 | PB00 — Port B GPIO 0 |
| Pin 38 | PB01 — Port B GPIO 1 |
| Pin 39 | PB02 — Port B GPIO 2 (ADC AIN10) |
| Pin 40 | PB03 — Port B GPIO 3 (ADC AIN11) |
| Pin 41 | PB04 — Port B GPIO 4 (ADC AIN12) |
| Pin 42 | PB05 — Port B GPIO 5 (ADC AIN13) |
| Pin 43 | PB06 — Port B GPIO 6 (ADC AIN14) |
| Pin 44 | PB07 — Port B GPIO 7 (ADC AIN15) |
| Pin 45 | PB08 — Port B GPIO 8 (ADC AIN16) |
| Pin 46 | PB09 — Port B GPIO 9 (ADC AIN17) |
| Pin 47 | PB10 — Port B GPIO 10 |
| Pin 48 | PB11 — Port B GPIO 11 |
| Pin 49 | PB12 — Port B GPIO 12 |
| Pin 50 | PB13 — Port B GPIO 13 |
| Pin 51 | PB14 — Port B GPIO 14 |
| Pin 52 | PB15 — Port B GPIO 15 |
| Pin 53 | PB16 — Port B GPIO 16 |
| Pin 54 | PB17 — Port B GPIO 17 |
| Pin 55 | PB18 — Port B GPIO 18 |
| Pin 56 | PB19 — Port B GPIO 19 |
| Pin 57 | PB20 — Port B GPIO 20 |
| Pin 58 | PB21 — Port B GPIO 21 |
| Pin 59 | GND — Ground |
| Pin 60 | VDDIN — Voltage regulator input |
| Pin 61 | VDDCORE — Internal core voltage output (decouple) |
| Pin 62 | VDDIO — I/O supply voltage |
| Pin 63 | RESETn — Reset input (active low) |
| Pin 64 | GND — Ground (Exposed Pad) |
Aplicaciones típicas
ATSAMD20J16A-MU es adecuado para 7 aplicacións: Home Automation Sensor Hubs, Industrial Metering & Data Loggers, Consumer HID Devices, Low-Power Wireless Sensor Nodes, Smart LED Lighting Controllers, Battery-Powered Wearable Fitness Bands, Automotive Body Electronics.
Home Automation Sensor Hubs
The ATSAMD20J16A-MU fits home automation sensor hubs because its Cortex-M0+ core at 48 MHz runs Zigbee or Thread host stack fragments, while six SERCOM channels multiplex UART/SPI/I2C for multi-sensor I/O. The 64 KB Flash accommodates an OTA bootloader plus application firmware. Wide 1.62-3.6 V supply allows direct connection to 2xAA cells or a single Li-ion. Sleepwalking peripherals sample temperature/humidity sensors autonomously, drawing microamps while the CPU sleeps, yielding multi-year battery life.
Recomendado
Industrial Metering & Data Loggers
In industrial metering, the ATSAMD20J16A-MU's 12-bit ADC (350 ksps) accurately samples analog signals from current transformers, flow meters, or strain gauges. The Event System allows timestamped ADC captures via TC triggers without CPU intervention, freeing the Cortex-M0+ for power-metering math. The 64-pin QFN package exposes enough GPIO for keypad inputs and segmented LCD driving via the integrated peripheral touch controller. Industrial -40C to +85C temperature grade handles harsh factory environments.
Recomendado
Consumer HID Devices
USB Human Interface Devices (keyboards, mice, game controllers) benefit from the ATSAMD20J16A-MU's full-speed USB 2.0 device peripheral and 48 MHz Cortex-M0+ that runs USB stacks without taxing CPU bandwidth. Six SERCOM channels handle auxiliary SPI/I2C peripherals such as RGB lighting or external sensors. With 8 KB SRAM, HID class descriptors and report buffers fit comfortably. The 64-QFN's small 9x9 mm footprint fits compact consumer enclosures.
Recomendado
Low-Power Wireless Sensor Nodes
Wireless sensor nodes paired with sub-GHz or 2.4 GHz transceivers leverage the ATSAMD20J16A-MU's sub-microamp sleep current and Sleepwalking peripherals. The MCU sleeps while the radio interrupts only on relevant packets, drawing minimal quiescent current. With 64 KB Flash, room exists for sensor drivers, link-layer security, and OTA firmware updates. The Cortex-M0+ executes AES-128 encryption blocks within tight timing budgets for encrypted transmissions.
Recomendado
Smart LED Lighting Controllers
The ATSAMD20J16A-MU drives smart LED lighting by combining PWM channels (TCC 24-bit + TC 16-bit timers) for high-resolution dimming and SERCOM channels for SPI-driven LED driver ICs. The Cortex-M0+ executes DMX, DALI, or proprietary lighting protocols in real time. 8 KB SRAM buffers color-mixing calculations, while 64 KB Flash holds firmware for multiple lighting modes. The 1.62-3.6 V supply matches directly-driven LED strips.
Recomendado
Battery-Powered Wearable Fitness Bands
Wearable fitness bands exploit the ATSAMD20J16A-MU's low-power architecture, with the Cortex-M0+ sleeping between accelerometer samples while the Event System captures motion events autonomously. The 12-bit ADC digitizes bio-sensor signals (heart-rate, SpO2), and SERCOM interfaces the IMU over I2C/SPI. The 64-QFN 9x9 mm footprint fits thin wearable enclosures, and the 1.62 V minimum supply extends usable battery life to nearly the full Li-ion discharge curve.
Recomendado
Automotive Body Electronics
Although the ATSAMD20J16A-MU is industrial-grade (-40C to +85C), it is widely used in non-safety automotive body electronics such as interior lighting controllers, seat-position memories, and HVAC blend-door actuators. The 64-pin QFN provides enough GPIO for multiple motor-driver or relay controls. For AEC-Q100-qualified applications, the SAMC20 automotive family (e.g., ATSAMC20J18A-AUT) provides pin-compatible drop-in upgrades in the same footprint. SERCOM channels handle LIN or CAN bus transceivers.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATSAMD20J16A-MU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATSAMD20J18A-MU | ATSAMD20J15A-MU | ATSAMD20J14B-MU | ATSAMD21J18A-MU | ATSAMC20J18A-MUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9x9) | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same | 64-QFN (9x9) - same |
| Flash | 64 KB | 256 KB | 32 KB | 16 KB | 256 KB | 256 KB |
| SRAM | 8 KB | 32 KB | 4 KB | 2 KB | 32 KB | 32 KB |
| CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 64 MHz | 48 MHz |
| FPU | No | No | No | No | Yes | No |
| AEC-Q100 | Not qualified | Not qualified | Not qualified | Not qualified | Not qualified | Qualified |
| USB | FS Device | FS Device | FS Device | FS Device | FS Host + Device | FS Device |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Industrial | Industrial | Automotive Grade 1 |
Diferenciadores clave
- Balanced memory density with abundant Flash for typical IoT workloads (frente a ATSAMD20J14B-MU)
- Lower cost than SAM D21 while sharing the same pinout (frente a ATSAMD21J18A-MU)
- Higher pin count and more peripherals than SAM D20E variants (frente a ATSAMD20E16A-MU)
- Industrial-grade vs AEC-Q100 of SAMC20 (frente a ATSAMC20J18A-MUT)
Notas de diseño
Estimated: at 48 MHz active current is ~7 mA typical; in deep-sleep with full SRAM retention, current drops below 5 uA. For battery-powered designs, use the integrated DFLL closed-loop mode with the 32.768 kHz crystal as reference to maintain accurate timing while the CPU sleeps. The on-chip voltage regulator requires a 1 uF X7R decoupling capacitor on VDDCORE (pin 11).
The 64-QFN (9x9 mm) package features an exposed thermal pad that MUST be soldered to a ground copper pour with thermal vias to meet specified electrical and thermal performance. Without proper thermal pad soldering, the die junction temperature can rise 20-30 C above ambient at full 48 MHz load, risking long-term reliability. Recommended copper pour area: at least 100 mm^2 of 1 oz copper with 9-12 thermal vias.
Route the SERCOM differential pairs (USB DP/DN on PA24/PA25) with 90 ohm differential impedance and length matching within 2 mm. Place the 32.768 kHz crystal traces symmetrically and within 5 mm of XIN/XOUT pins (PA00/PA01). Avoid routing digital signals under the QFN thermal pad region to prevent noise coupling into the analog ADC reference.
Do not leave the NRESET pin floating - it requires a 10 kohm pull-up to VDDIO or a manual reset supervisor. SERCOM channel-to-pin mapping is configured via the PORT PMUX[].PMUXE/PMUXO registers; misconfiguration is the most common reason for UART/SPI/I2C not working on first prototype. Always initialize the GCLK (Generic Clock Controller) before enabling SERCOM peripherals.
For ADC sampling above 100 ksps, add an external buffer (e.g., MCP6002 op-amp) between the analog source and the ADC input pin to handle the S&H capacitor charging transients. The ADC reference voltage (VREFA on pin 4) should be decoupled with a 100 nF ceramic + 10 uF tantalum capacitor combination for low-noise high-resolution conversions.
Información de cumplimiento
Industrial temperature grade -40C to +85C. RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose ATSAMC20 family for automotive.
