ATSAMD20G14B-MU - 48MHz ARM Cortex-M0+ MCU 16KB Flash | Microchip
MPN: ATSAMD20G14B-MU ✓ Hoạt độngATSAMD20G14B-MU Tóm tắt
An ARM Cortex-M0+ microcontroller is a 32-bit RISC processor core implementing the Thumb/Thumb-2 instruction set, optimized for energy-efficient embedded designs. The Cortex-M0+ sits within a broader hierarchy of MCU cores (Cortex-M0 -> Cortex-M0+ -> Cortex-M3 -> Cortex-M4 -> Cortex-M7), and the SAMD20 family belongs to the larger Atmel/Microchip SAM D family of microcontrollers, which in turn is part of the embedded MCU segment of the semiconductor industry.
Key features include the Cortex-M0+ core with single-cycle hardware multiply, the SERCOM module that can be configured as UART/USART, SPI, or I2C, an 8-channel 12-bit ADC with up to 350 ksps conversion rate, a 10-bit 350 ksps DAC, and a full-speed USB 2.0 device with on-chip transceiver. The device also includes a 32 kHz RTC, multiple PWM-capable timers (TC), and an Event System for inter-peripheral signaling without CPU intervention.
The ATSAMD20G14B-MU uses an embedded Flash memory technology for program storage and SRAM for data, with hardware AES encryption accelerator (on select variants) and a true random number generator on some family members. The 48-pin QFN package offers a compact footprint, low parasitic inductance, and excellent thermal dissipation through the exposed pad, enabling dense PCB layouts in industrial control and IoT designs.
Typical applications include home-automation controllers, sensor node data loggers, low-power wireless sensor hubs, USB HID peripherals, smart metering endpoints, and industrial control modules. Compared with simple 8-bit MCUs, the Cortex-M0+ delivers a 4-5x MIPS/mW efficiency improvement, enabling longer battery life in remote sensor applications.
When designing with this part, ensure that the exposed pad on the QFN package is soldered to a properly-sized copper pour (typically 5x5 mm of 1 oz copper minimum) to keep junction temperature within the -40C to +85C industrial operating range. Decouple VDDIN and VDDIO with at least 1 uF X7R ceramic bypass capacitors placed close to the pins to avoid inrush-current glitches during SERCOM or ADC operation.
This page synthesizes distributor pricing, drop-in alternatives from the SAMD20 family, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAMD20G14B-MU — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAMD20G14B-MU (cùng hình factor và footprint) — khác nhau ở ADC, Package, Core, DAC, Flash Memory.
ATSAMD20G14A-MU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD20G15B-MU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20E14B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAMD20E14A-AU
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATSAMD20G14B-MU Tỷ lệ tối đa & tính chất điện
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 16 KB |
| SRAM | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| I/O Pins | 38 (maximum) |
| Hộp | 48-VFQFN Exposed Pad (7x7 mm) |
| SERCOM Modules | 6 (configurable UART/SPI/I2C) |
| ADC | 12-bit, up to 350 ksps |
| DAC | 10-bit, 350 ksps |
| USB | Full-speed USB 2.0 Device |
| Timers/Counters (TC) | 3x 16-bit (PWM capable) |
| RTC | 32 kHz internal RTC |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
| Lead Free / RoHS | Yes / Compliant |
Cấu hình chân ATSAMD20G14B-MU
| Chân 1 | PA00 — GPIO / XIN32K |
| Chân 2 | PA01 — GPIO / XOUT32K |
| Chân 3 | PA02 — GPIO / AIN0 / VREFA |
| Chân 4 | PA03 — GPIO / AIN1 / VREFB |
| Chân 5 | GND — Ground |
| Chân 6 | VDDIO — I/O supply voltage |
| Chân 7 | PA04 — GPIO / AIN2 |
| Chân 8 | PA05 — GPIO / AIN3 |
| Chân 9 | PA06 — GPIO / AIN4 |
| Chân 10 | PA07 — GPIO / AIN5 |
| Chân 11 | PA08 — GPIO |
| Chân 12 | PA09 — GPIO |
| Chân 13 | PA10 — GPIO |
| Chân 14 | PA11 — GPIO |
| Chân 15 | PA14 — GPIO |
| Chân 16 | PA15 — GPIO |
| Chân 17 | PA16 — GPIO / SERCOM-I2C SDA |
| Chân 18 | PA17 — GPIO / SERCOM-I2C SCL |
| Chân 19 | PA18 — GPIO / SERCOM-SPI MOSI |
| Chân 20 | PA19 — GPIO / SERCOM-SPI SCK |
| Chân 21 | PA20 — GPIO / SERCOM-I2C SDA 2 |
| Chân 22 | PA21 — GPIO / SERCOM-I2C SCL 2 |
| Chân 23 | PA22 — GPIO / SERCOM |
| Chân 24 | PA23 — GPIO / SERCOM |
| Chân 25 | PA24 — GPIO / USB-DM |
| Chân 26 | PA25 — GPIO / USB-DP |
| Chân 27 | PB00 — GPIO |
| Chân 28 | PB01 — GPIO |
| Chân 29 | PB02 — GPIO / AIN6 |
| Chân 30 | PB03 — GPIO / AIN7 |
| Chân 31 | PB04 — GPIO |
| Chân 32 | PB05 — GPIO |
| Chân 33 | PB06 — GPIO |
| Chân 34 | PB07 — GPIO |
| Chân 35 | PB08 — GPIO |
| Chân 36 | PB09 — GPIO |
| Chân 37 | PB10 — GPIO |
| Chân 38 | PB11 — GPIO |
| Chân 39 | PB12 — GPIO |
| Chân 40 | PB13 — GPIO |
| Chân 41 | PB14 — GPIO |
| Chân 42 | PB15 — GPIO |
| Chân 43 | PB16 — GPIO |
| Chân 44 | PB17 — GPIO |
| Chân 45 | NRST — External reset (active low) |
| Chân 46 | VSW — Core-regulator switch node |
| Chân 47 | VDDIN — Main supply input |
| Chân 48 | GND — Ground |
Ứng dụng tiêu biểu
ATSAMD20G14B-MU phù hợp cho 6 Áp dụngs: Home Automation Controllers, Smart Metering Endpoints, Industrial Control Modules, USB HID Peripherals, Portable Sensor Data Loggers, IoT Sensor Hubs.
Home Automation Controllers
The ATSAMD20G14B-MU is well suited for home-automation controllers thanks to its 48-MHz Cortex-M0+ core, six SERCOM modules, and 1.62 V to 3.63 V supply range. Why this part fits: the SERCOM count lets it handle multi-bus sensor networks (I2C for sensors, SPI for a wireless modem, UART for debug), while its low 1.62 V minimum supply enables operation directly from two AA cells. How it is used and trade-off: the MCU typically runs a small RTOS or bare-metal scheduler while one SERCOM acts as the host-side interface for Zigbee, Thread, or Matter modules. Compared with high-end Cortex-M4 parts, this part reduces BOM cost by 35 to 50% while retaining adequate headroom for protocol stacks under 50 MHz.
Được đề xuất
Smart Metering Endpoints
In smart-metering endpoint designs, the ATSAMD20G14B-MU provides a regulated 32 kHz RTC plus a 12-bit ADC accurate enough for power-quality monitoring. Why this part fits: low 1.62 V operation permits direct Li-ion or super-capacitor backup, and the 12-bit SAR ADC offers 350 ksps to capture voltage and current waveforms. How it is used and trade-off: the MCU samples voltage and current channels at 4 ksps, computes RMS and harmonic content, and transmits results via one SERCOM UART or a wireless module. Compared with dedicated metering DSPs, this part trades compute density for bill-of-materials cost, offloading heavy DSP to a companion or to a cloud service.
Được đề xuất
Industrial Control Modules
Industrial control modules benefit from the industrial temperature grade (-40 C to +85 C) and 48-MHz compute headroom of the ATSAMD20G14B-MU. Why this part fits: its 6 flexible SERCOM interfaces support simultaneous field-bus transceivers (RS-485, SPI sensor bus, I2C GPIO expansion) while the event system allows deterministic inter-peripheral signaling with zero CPU overhead. How it is used and trade-off: this MCU is commonly deployed in PLC sub-blocks, motor-control pre-drivers, and 4-20 mA transmitter heads. Compared with 8-bit PIC16F alternatives, the Cortex-M0+ delivers 3-5x throughput, easing the move to modern IEC 61131-3 or vendor-specific stacks.
Được đề xuất
USB HID Peripherals
The ATSAMD20G14B-MU integrates a full-speed USB 2.0 Device controller with on-chip transceiver, making it a strong choice for USB HID peripherals like custom keyboards, industrial input devices, and test probes. Why this part fits: the integrated transceiver removes the need for an external 12 MHz clock chip, while 16 KB flash plus 2 KB SRAM is sufficient for typical HID boot or HID-based vendor class firmware. How it is used and trade-off: the MCU acts as a USB device endpoint on one physical SERCOM-replacement role, with up to 6 endpoints. Compared with external USB-IC solutions, this part reduces PCB real estate by ~70% and BOM cost by ~25%.
Được đề xuất
Portable Sensor Data Loggers
For battery-powered sensor data loggers, the ATSAMD20G14B-MU combines low-power Sleep modes (as low as a few uA in deep-sleep) with 16 KB flash and 2 KB SRAM, plus a built-in RTC for timestamping. Why this part fits: the wide 1.62 V to 3.63 V supply range supports direct battery operation from a CR2032 or 2xAA cells, while the rich SERCOM + ADC integration eliminates extra chips. How it is used and trade-off: the MCU wakes on RTC alarm, scans a sensor cluster via I2C, stores data to internal flash, and re-enters sleep. Compared with discrete MCU+ADC solutions, this part cuts the BOM by ~$1 and shrinks the PCB footprint by ~60%.
Được đề xuất
IoT Sensor Hubs
IoT sensor hubs use the ATSAMD20G14B-MU to aggregate data from multiple sensors before forwarding it to a host via SPI, UART, or BLE module. Why this part fits: six SERCOM modules support an I2C sensor cluster, an SPI NVM, a UART debug, and an SPI wireless co-processor simultaneously. How it is used and trade-off: the MCU sits at the center of the hub, runs an RTOS-like scheduler, and offloads only short bursts to the Cortex-M0+ core. Compared with higher-end Cortex-M4 hubs, this MCU reduces power consumption by ~30% and BOM cost by ~40% at the expense of more conservative data-processing capabilities.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAMD20G14B-MU — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAMD20G14A-MU | ATSAMD20G15B-MU | ATSAMD20E14B-MU | ATSAMD20E14A-AU |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-VFQFN (7x7 mm) | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-VFQFN (7x7 mm) - same | 48-QFN (7x7 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ (enhanced) | ARM Cortex-M0+ (enhanced) |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Voltage Range | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| SERCOM Modules | 6 | 6 | 6 | 6 (richer pin-mux) | 6 (richer pin-mux) |
| Unit Price (qty 1) | USD 2.52 | USD ~2.50 | USD ~3.10 | USD ~3.50 | USD ~3.40 |
Bảo phân biệt quan trọng
- Lowest-cost Cortex-M0+ in 48-QFN SAMD20 family (vsATSAMD20G15B-MU)
- Silicon revision B has lower errata count than revision A (vsATSAMD20G14A-MU)
- Six SERCOM modules offer more peripheral flexibility than most ARM-M0 competitors (vsPIC16F628A-I/SO)
Ghi chú thiết kế
The 48-QFN 7x7 mm package uses an exposed pad (EP) that must be soldered to a thermal pad of at least 5x5 mm on the PCB, connected to GND via at least 6 thermal vias (0.3 mm drill, 0.6 mm pad). Estimated: with 1 oz copper pour this gives theta_JA of about 30 C/W, allowing the industrial 85 C ambient to be met under typical 30 mW active consumption. Without the thermal pad, theta_JA rises to ~85 C/W, risking T_J exceedance.
Place the 1 uF X7R ceramic decoupling capacitor within 5 mm of the VDDIN pin and the 1 uF capacitor on VDDIO within 5 mm of that pin. The 1 uH inductor on VSW must sit within 3 mm of that pin with a wide (>=20 mil) trace to minimize ripple and EMC emissions. Keep the crystal traces within 1 mm length and shield them with a grounded guard ring.
Do not leave the NRST pin floating - pull up to VDDIO via 10 kohm and provide a 1 nF decoupling cap for EMI suppression. Ensure the USB-DP/DM lines are routed as a 90-ohm differential pair on the top layer with a continuous ground reference. Avoid using PA24/PA25 (USB pins) for GPIO if you need USB Device - they become the physical D+/D- upon enabling the USB controller.
Thông tin tuân thủ
RoHS 3 compliant and lead-free per Microchip product page. Industrial-grade temperature range -40 to +85 C. AEC-Q100 automotive qualification status was not found in the verified data; choose ATSAMC21G18A-AUT or ATSAM D20 automotive-grade variant for AEC-Q100 needs.
