ATSAMC20J16A-MUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAMC20J16A-MUT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.15 | $315.00 |
| 500 | $2.66 | $1,330.00 |
| 1,000 | $2.25 | $2,250.00 |
ATSAMC20J16A-MUT Overview
What is a microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripherals such as timers, communication interfaces, and analog blocks. The SAM C20 family uses the Cortex-M0+ core, the smallest and most energy-efficient ARM core, which offers deterministic interrupt response and a Thumb-2 instruction subset. Positioned in the product hierarchy, an MCU sits between simple microprocessors (MPUs without on-chip memory) and full System-on-Chips (SoCs). The C20 sub-family adds 5V-tolerant I/O and CAN-FD, distinguishing it from lower-voltage SAM D20 cousins.
Key features include the Peripheral Touch Controller (PTC) supporting capacitive touch sensing up to 256 buttons via the QTouch library, a 12-bit ADC with up to 12 channels and 1 MSPS conversion rate, a 10-bit DAC, up to six SERCOM (serial communication) interfaces configurable as UART/SPI/I2C, and a full-speed USB 2.0 device interface. The Event System allows inter-peripheral signaling without CPU intervention, lowering latency and power. Hardware AES and True Random Number Generator (TRNG) provide security primitives for connected nodes. The Cortex-M0+ core consumes only 50 uA/MHz active and supports Sleep, Standby, and Backup modes down to 1.5 uA typical, enabling battery-friendly operation.
Typical applications include automotive body electronics (HVAC panels, seat controllers, lighting, CAN nodes), industrial sensor hubs (4-20 mA loops, Modbus bridges), capacitive touch keypads and sliders for appliances, low-cost HMI with segment LCD or TFT up to small WVGA, and CAN-FD industrial automation nodes. The integrated PTC eliminates the need for an external touch controller, reducing BOM cost in white-goods and IoT devices.
When designing with this MCU, allocate at least one SERCOM for each required protocol, since each SERCOM is software-configurable but only runs one interface at a time. For CAN-FD, add a CAN transceiver such as the MCP2562FD on the CANH/CANL lines. Place decoupling capacitors (100 nF plus 4.7 uF bulk) within 2 mm of the VDDCORE and VDDIO pins, and route the exposed pad to a continuous ground plane for thermal dissipation.
Drop-in alternatives for ATSAMC20J16A-MUT β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMC20J16A-MUT (same form factor and footprint) β differing in Package, ADC, I/O Pins, Program Memory (Flash), Operating Temperature.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATSAMC20G16A-MNT
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$2.21 / Unit
View Datasheet βATSAMC20G18A-ANT
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$2.34 / Unit
View Datasheet βATSAMC20G15A-MUT
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$1.55 / Unit
View Datasheet βATSAMC20J16A-AUT
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$1.82 / Unit
View Datasheet βATSAMC20E16A-MNT
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.85 / Unit
View Datasheet βATSAMC20E15A-MUT
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.61 / Unit
View Datasheet βATSAMC20J16A-MUT Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Max CPU Clock | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) |
| I/O Pins | 52 |
| Package | 64-pin QFN (9x9 mm) with EP |
| Communication | 6x SERCOM (UART/SPI/I2C), 1x CAN-FD, USB 2.0 FS |
| ADC | 12-bit, up to 12 channels, 1 MSPS |
| DAC | 10-bit, 1 channel |
| Touch Controller | PTC (up to 256 buttons via QTouch) |
| Timers | TC (16-bit), TCC (24-bit), RTC |
| Security | AES-128, TRNG |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
| Packaging | Tape & Reel |
ATSAMC20J16A-MUT Pin Configuration
| Pin 1 | VDDIO β I/O supply voltage (2.7V-5.5V) |
| Pin 2 | PA00 β GPIO / SERCOM0 PAD0 |
| Pin 3 | PA01 β GPIO / SERCOM0 PAD1 |
| Pin 4 | PA02 β GPIO / AIN0 (ADC input) |
| Pin 5 | PA03 β GPIO / AIN1 / VREFA |
| Pin 6 | GND β Ground |
| Pin 7 | PA04 β GPIO / AIN2 |
| Pin 8 | PA05 β GPIO / AIN3 |
| Pin 9 | PA06 β GPIO / AIN4 |
| Pin 10 | PA07 β GPIO / AIN5 |
| Pin 11 | PA08 β GPIO / SERCOM2 PAD0 / I2S |
| Pin 12 | PA09 β GPIO / SERCOM2 PAD1 / I2S |
| Pin 13 | PA10 β GPIO / SERCOM2 PAD2 |
| Pin 14 | PA11 β GPIO / SERCOM2 PAD3 |
| Pin 15 | PA12 β GPIO / SERCOM4 PAD0 |
| Pin 16 | PA13 β GPIO / SERCOM4 PAD1 |
| Pin 17 | PA14 β GPIO / SERCOM4 PAD2 / XIN32 |
| Pin 18 | PA15 β GPIO / SERCOM4 PAD3 / XOUT32 |
| Pin 19 | PA16 β GPIO / SERCOM3 PAD0 / I2S |
| Pin 20 | PA17 β GPIO / SERCOM3 PAD1 / I2S |
| Pin 21 | PA18 β GPIO / SERCOM3 PAD2 |
| Pin 22 | PA19 β GPIO / SERCOM3 PAD3 |
| Pin 23 | PA20 β GPIO / SERCOM5 PAD2 |
| Pin 24 | PA21 β GPIO / SERCOM5 PAD3 |
| Pin 25 | PA22 β GPIO / SERCOM3 PAD0 |
| Pin 26 | PA23 β GPIO / SERCOM3 PAD1 / USB ID |
| Pin 27 | PA24 β GPIO / USB D- |
| Pin 28 | PA25 β GPIO / USB D+ |
| Pin 29 | PA26 β GPIO |
| Pin 30 | PA27 β GPIO |
| Pin 31 | PA28 β GPIO |
| Pin 32 | PA29 β GPIO / CAN-TX |
| Pin 33 | PA30 β GPIO / CAN-RX |
| Pin 34 | PA31 β GPIO |
| Pin 35 | PB00 β GPIO / SERCOM5 PAD0 |
| Pin 36 | PB01 β GPIO / SERCOM5 PAD1 |
| Pin 37 | PB02 β GPIO / SERCOM5 PAD2 / AIN10 |
| Pin 38 | PB03 β GPIO / SERCOM5 PAD3 / AIN11 |
| Pin 39 | PB04 β GPIO / SERCOM4 PAD0 |
| Pin 40 | PB05 β GPIO / SERCOM4 PAD1 |
| Pin 41 | PB06 β GPIO / SERCOM4 PAD2 |
| Pin 42 | PB07 β GPIO / SERCOM4 PAD3 |
| Pin 43 | PB08 β GPIO / SERCOM4 PAD0 / TC4 |
| Pin 44 | PB09 β GPIO / SERCOM4 PAD1 / TC5 |
| Pin 45 | PB10 β GPIO / SERCOM4 PAD2 / TC6 |
| Pin 46 | PB11 β GPIO / SERCOM4 PAD3 / TC7 |
| Pin 47 | PB12 β GPIO / SERCOM4 PAD0 / TCC0 |
| Pin 48 | PB13 β GPIO / SERCOM4 PAD1 / TCC0 |
| Pin 49 | PB14 β GPIO / SERCOM4 PAD2 / TCC0 |
| Pin 50 | PB15 β GPIO / SERCOM4 PAD3 / TCC0 |
| Pin 51 | PB16 β GPIO / SERCOM5 PAD0 / TCC1 |
| Pin 52 | PB17 β GPIO / SERCOM5 PAD1 / TCC1 |
| Pin 53 | PB18 β GPIO / SERCOM3 PAD2 / TCC1 |
| Pin 54 | PB19 β GPIO / SERCOM3 PAD3 / TCC1 |
| Pin 55 | PB20 β GPIO / SERCOM3 PAD0 |
| Pin 56 | PB21 β GPIO / SERCOM3 PAD1 |
| Pin 57 | VBAT β RTC battery supply |
| Pin 58 | VDDCORE β Core voltage (1.62V internal LDO) |
| Pin 59 | GND β Ground |
| Pin 60 | VDDIO β I/O supply |
| Pin 61 | VDDANA β Analog supply |
| Pin 62 | GNDANA β Analog ground |
| Pin 63 | XIN β Crystal oscillator input |
| Pin 64 | XOUT β Crystal oscillator output |
Typical Applications
ATSAMC20J16A-MUT is suitable for 6 applications: Automotive Body Electronics (HVAC, Lighting, Seat Control), Capacitive Touch Keypads and Sliders, Industrial Sensor Hubs and 4-20 mA Loops, Low-Cost HMI with TFT or Segment LCD, IoT Edge Nodes with USB and CAN, Battery-Operated Sensor Aggregators.
Automotive Body Electronics (HVAC, Lighting, Seat Control)
The ATSAMC20J16A-MUT fits automotive body modules thanks to its 5V-tolerant I/O, integrated CAN-FD controller, and PTC for capacitive touch panels. At 48 MHz it runs LIN, CAN-FD, and sensor conditioning tasks concurrently, while the 64 KB Flash accommodates HVAC control loops, lighting sequences, and seat-position memory. The 12-bit ADC with 1 MSPS samples multiple position and temperature sensors per cycle. Power consumption under 3.5 mA active makes it suitable for body modules that remain on even when ignition is off. For AEC-Q100 compliance, designers must select the -AUT automotive suffix variant instead.
Recommended
Capacitive Touch Keypads and Sliders
The on-chip Peripheral Touch Controller (PTC) enables the ATSAMC20J16A-MUT to scan up to 256 capacitive buttons or a 4x4 matrix slider without external analog front ends. Each touch event requires only a single SERCOM line for I2C communication with a host, freeing pins for backlight PWM via the TCC peripheral. The 5V tolerance simplifies integration with 5V-driven LED ring indicators and piezo buzzers. With 8 KB SRAM, the device stores touch-baseline calibration and gesture state without external memory. QTouch library support cuts firmware development time to weeks instead of months.
Recommended
Industrial Sensor Hubs and 4-20 mA Loops
The ATSAMC20J16A-MUT consolidates multiple analog and digital sensor inputs in industrial hubs via its 12-bit ADC and 6 SERCOM channels. It reads 4-20 mA current-loop sensors through a low-side shunt, runs Modbus RTU over RS-485, and forwards data to a PLC or cloud gateway. Industrial -40C to +85C rating permits deployment in unheated cabinets, while 5V tolerance accepts 24V-bus-derived rails after regulation. With 64 KB Flash, the device stores both sensor-conditioning firmware and a Modbus mapping table on-chip. The CAN-FD controller also supports CANopen DS301 profiles for factory automation.
Recommended
Low-Cost HMI with TFT or Segment LCD
The 48 MHz Cortex-M0+ core drives small TFT displays up to 320x240 (QVGA) using the integrated SERCOM peripherals as SPI interfaces, while the TCC timer generates PWM backlight control. Segment LCD support via the on-chip SLCD controller is available on related SAM C20 variants but requires firmware changes here. 64 KB Flash holds fonts, icons, and a simple LVGL-style UI library, while 8 KB SRAM provides framebuffer space for partial-screen updates. The 5V-tolerant GPIO directly drives LCD bias voltages, reducing external level shifters.
Recommended
IoT Edge Nodes with USB and CAN
The ATSAMC20J16A-MUT serves as a USB-CAN gateway or a USB-sensor bridge in IoT edge nodes. Its USB 2.0 Full-Speed device interface enumerates as a CDC-ACM virtual COM port or a vendor-specific class, while the CAN-FD controller connects to a CAN bus carrying sensor data. AES-128 hardware acceleration secures over-the-air firmware updates, and TRNG provides entropy for TLS handshake nonces. With 64 KB Flash and 8 KB SRAM, the device can host a lightweight MQTT-SN or CoAP stack alongside CAN parsing. Low standby current below 1.5 uA enables battery-powered deployments.
Recommended
Battery-Operated Sensor Aggregators
In battery-powered sensor aggregators, the ATSAMC20J16A-MUT spends most of its time in Standby mode with the RTC running at 1.5 uA typical, waking on RTC match, SERCOM match, or ADC threshold interrupt. Active current of 50 uA/MHz at 48 MHz means a short 5 ms wake-and-transmit window only consumes 12 uA average per minute, allowing CR2032 cells to last years. The integrated ADC and PTC eliminate external analog ICs, reducing quiescent draw to a single supply. The 5V tolerance permits direct connection to multi-cell battery packs without LDO overhead.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMC20J16A-MUT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMC20G16A-MNT | ATSAMC20G18A-ANT | ATSAMC20G15A-MUT | ATSAMC20J16A-AUT | ATSAMC20E16A-MNT | ATSAMC20E15A-MUT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin QFN (9x9) | 64-pin QFN (9x9) | 64-pin QFN (9x9) | 64-pin QFN (9x9) | 64-pin TQFP (10x10) | 32-pin QFN | 32-pin QFN |
| Flash Memory | 64 KB | 48 KB | 256 KB | 32 KB | 64 KB | 64 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| Max CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| GPIO Count | 52 | 52 | 52 | 52 | 52 | 26 | 26 |
| Operating Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| CAN-FD | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- 5V-tolerant I/O with integrated CAN-FD (vs ATSAMD20J16A-MUT)
- Integrated PTC eliminates external touch controller (vs External AT42QT1010 chain)
- Same-family scalability without PCB rework (vs Cross-brand STM32G031 or XMC1100)
- AES-128 and TRNG hardware security (vs Software AES on Cortex-M0)
Design Notes
The ATSAMC20J16A-MUT has separate VDDCORE, VDDIO, and VDDANA pins. According to the SAM C20 datasheet, VDDIO and VDDANA must be tied to the same 2.7-5.5V supply, while VDDCORE is supplied by the internal 1.62V LDO. Place a 100 nF ceramic decoupling capacitor within 2 mm of each VDD pin and a 4.7 uF bulk capacitor near VDDCORE. If the application draws more than 50 mA, add a ferrite bead between VDDIO and VDDANA to isolate analog noise from switching digital current. For battery-powered designs, disable the Brown-Out Detector (BOD33) in Standby mode to minimize quiescent current.
The 64-pin QFN has an exposed thermal pad (EP) on pin 65 (not counted in the 64 numbered pins) that must be soldered to the ground plane for thermal and electrical performance. Estimated: at 48 MHz with all peripherals active at 3.3V, typical power dissipation is 17 mW, so the thermal pad carries about 2 C/W to a 4-layer FR4 board. For industrial -40C to +85C operation, this provides 50 C of margin. If the design enters high-temperature enclosures, route multiple thermal vias under the EP to spread heat into inner copper layers.
Route the XIN/XOUT crystal traces as a short, symmetric differential pair within 5 mm of the device. Use a guard ground trace around the crystal and keep digital signals at least 3 mm away to avoid coupling. According to Microchip application note AN00027, the load capacitors for the crystal must be sized per the crystal manufacturer's CL specification divided by 2, with stray PCB capacitance accounted for. For USB designs, route D+/D- as a 90-ohm differential pair with no stubs, and place the USB connector within 25 mm of the MCU pins.
Do not enable CAN-FD without first configuring the CAN transceiver's STBY pin; otherwise the bus remains recessive and no acknowledgement is generated. Common pitfall: forgetting to write the GCLK configuration before peripheral initialization, which causes SERCOM baud-rate errors. The SERCOM pads must be multiplexed via the PORT group before peripheral clock enables. Per the SAM C20 errata (DS80000810), revision A parts have a USB suspend current anomaly fixed by setting the VREG.SUPPLY bit in the SUPC controller. Always check the errata document during board bring-up.
For capacitive touch using the PTC, route the touch electrodes with a solid ground hatch plane below them, but leave the electrode area clear of copper for 5 mm. Per Microchip AN0067, ground fill near touch electrodes increases parasitic capacitance and reduces sensitivity. Keep the touch electrode traces short (less than 50 mm) and identical length where possible. Use 0.1 mm trace width on 0.5 mm pitch to maintain signal integrity. Twisted pair or shielded cables are not recommended; the PTC expects direct PCB electrodes.
Compliance Information
RoHS and REACH compliant per Microchip product page. The standard -MUT suffix is industrial grade and not AEC-Q100 qualified; for AEC-Q100 automotive applications, choose the -AUT auto-grade suffix variant.
