ATSAMD20J16A-MU - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
Référence : ATSAMD20J16A-MU ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour ATSAMD20J16A-MU — 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 ATSAMD20J16A-MU (même facteur de forme et même empreinte) — différant par Package, Operating Temperature, Program Memory (Flash), SRAM, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ATSAMD20J18A-MU
✅ Remplacement direct✓ En stock
$2.69 / unité
Voir la fiche technique →ATSAMD20J15A-MU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMD20J14B-MU
✅ Remplacement direct✓ En stock
$2.05 / unité
Voir la fiche technique →ATSAMD21J18A-MU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATSAMC20J18A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.3 / unité
Voir la fiche technique →ATSAMD11D14A-MUT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATSAMD20J16A-MU Valeurs maximales et caractéristiques électriques
| 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 |
| Boîtier | 64-QFN (9x9 mm) with Exposed Pad |
| Température de fonctionnement | -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 |
| Statut RoHS | Compliant |
| Niveau MSL | 3 (168 hours) |
| Type de montage | Surface Mount |
| Series | SAM D20J |
Configuration des broches de ATSAMD20J16A-MU
| Broche 1 | PA00 — Port A GPIO 0 (XIN) |
| Broche 2 | PA01 — Port A GPIO 1 (XOUT) |
| Broche 3 | PA02 — Port A GPIO 2 (ADC AIN0) |
| Broche 4 | PA03 — Port A GPIO 3 (ADC AIN1, VREFA) |
| Broche 5 | PA04 — Port A GPIO 4 (ADC AIN2, VREFB) |
| Broche 6 | PA05 — Port A GPIO 5 (ADC AIN3) |
| Broche 7 | PA06 — Port A GPIO 6 (ADC AIN4) |
| Broche 8 | PA07 — Port A GPIO 7 (ADC AIN5) |
| Broche 9 | PA08 — Port A GPIO 8 (ADC AIN6) |
| Broche 10 | PA09 — Port A GPIO 9 (ADC AIN7) |
| Broche 11 | PA10 — Port A GPIO 10 (ADC AIN8) |
| Broche 12 | PA11 — Port A GPIO 11 (ADC AIN9) |
| Broche 13 | VDDIO — I/O supply voltage |
| Broche 14 | GND — Ground |
| Broche 15 | PA12 — Port A GPIO 12 |
| Broche 16 | PA13 — Port A GPIO 13 |
| Broche 17 | PA14 — Port A GPIO 14 |
| Broche 18 | PA15 — Port A GPIO 15 |
| Broche 19 | PA16 — Port A GPIO 16 |
| Broche 20 | PA17 — Port A GPIO 17 |
| Broche 21 | PA18 — Port A GPIO 18 |
| Broche 22 | PA19 — Port A GPIO 19 |
| Broche 23 | PA20 — Port A GPIO 20 |
| Broche 24 | PA21 — Port A GPIO 21 |
| Broche 25 | PA22 — Port A GPIO 22 |
| Broche 26 | PA23 — Port A GPIO 23 |
| Broche 27 | PA24 — Port A GPIO 24 (USB D-) |
| Broche 28 | PA25 — Port A GPIO 25 (USB D+) |
| Broche 29 | GND — Ground |
| Broche 30 | VDDIO — I/O supply voltage |
| Broche 31 | PA26 — Port A GPIO 26 |
| Broche 32 | PA27 — Port A GPIO 27 |
| Broche 33 | PA28 — Port A GPIO 28 |
| Broche 34 | PA29 — Port A GPIO 29 |
| Broche 35 | PA30 — Port A GPIO 30 (SWCLK) |
| Broche 36 | PA31 — Port A GPIO 31 (SWDIO) |
| Broche 37 | PB00 — Port B GPIO 0 |
| Broche 38 | PB01 — Port B GPIO 1 |
| Broche 39 | PB02 — Port B GPIO 2 (ADC AIN10) |
| Broche 40 | PB03 — Port B GPIO 3 (ADC AIN11) |
| Broche 41 | PB04 — Port B GPIO 4 (ADC AIN12) |
| Broche 42 | PB05 — Port B GPIO 5 (ADC AIN13) |
| Broche 43 | PB06 — Port B GPIO 6 (ADC AIN14) |
| Broche 44 | PB07 — Port B GPIO 7 (ADC AIN15) |
| Broche 45 | PB08 — Port B GPIO 8 (ADC AIN16) |
| Broche 46 | PB09 — Port B GPIO 9 (ADC AIN17) |
| Broche 47 | PB10 — Port B GPIO 10 |
| Broche 48 | PB11 — Port B GPIO 11 |
| Broche 49 | PB12 — Port B GPIO 12 |
| Broche 50 | PB13 — Port B GPIO 13 |
| Broche 51 | PB14 — Port B GPIO 14 |
| Broche 52 | PB15 — Port B GPIO 15 |
| Broche 53 | PB16 — Port B GPIO 16 |
| Broche 54 | PB17 — Port B GPIO 17 |
| Broche 55 | PB18 — Port B GPIO 18 |
| Broche 56 | PB19 — Port B GPIO 19 |
| Broche 57 | PB20 — Port B GPIO 20 |
| Broche 58 | PB21 — Port B GPIO 21 |
| Broche 59 | GND — Ground |
| Broche 60 | VDDIN — Voltage regulator input |
| Broche 61 | VDDCORE — Internal core voltage output (decouple) |
| Broche 62 | VDDIO — I/O supply voltage |
| Broche 63 | RESETn — Reset input (active low) |
| Broche 64 | GND — Ground (Exposed Pad) |
Applications typiques
ATSAMD20J16A-MU convient pour 7 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATSAMD20J16A-MU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Balanced memory density with abundant Flash for typical IoT workloads (vs ATSAMD20J14B-MU)
- Lower cost than SAM D21 while sharing the same pinout (vs ATSAMD21J18A-MU)
- Higher pin count and more peripherals than SAM D20E variants (vs ATSAMD20E16A-MU)
- Industrial-grade vs AEC-Q100 of SAMC20 (vs ATSAMC20J18A-MUT)
Notes de conception
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.
Informations de conformité
Industrial temperature grade -40C to +85C. RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose ATSAMC20 family for automotive.
