ATSAMD20G14A-AUT - 48MHz Cortex-M0+ MCU 16KB Flash TQFP-48 | Microchip
料号： ATSAMD20G14A-AUT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.82 | $2.82 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.74 | $1,740.00 |
ATSAMD20G14A-AUT 概述
What is an ARM Cortex-M0+ microcontroller? It is a 32-bit RISC processor core designed by ARM as the most energy-efficient member of the Cortex-M family, intended for deeply embedded applications. Microcontrollers integrating Cortex-M0+ cores (Cortex-M0+ MCU -> ARM microcontroller -> 32-bit MCU -> embedded controller) bridge sensor/actuator signals to firmware-driven decision logic in IoT endpoints, motor nodes, and portable instruments.
Key features of the ATSAMD20G14A-AUT include 16 KB Flash, 2 KB SRAM, an integrated Serial Communication Interface (SERCOM) block configurable as UART/SPI/I2C, a 12-bit ADC, a 10-bit DAC, multiple timers, and the full Microchip SAM D20 peripheral set. The device operates from 1.62 V to 3.63 V, supports industrial temperature grade (-40C to +85C), and includes the SleepWalking peripheral event system that lets peripherals wake the CPU autonomously to minimize average power consumption.
Architecturally, the ATSAMD20G14A-AUT combines a single-cycle Cortex-M0+ core with a 6-channel DMA controller, an event system for inter-peripheral signaling, and Microchip's Atmel Studio/MPLAB X toolchain compatibility. Code execution is deterministic, interrupt latency is short, and the integrated voltage regulator supports single-supply Li-ion or 3.3 V designs without external regulation.
Typical applications include smart-home sensor hubs, low-power wireless nodes (when paired with an external transceiver), industrial metering, HVAC controllers, consumer white goods, and human-machine interface (HMI) touch panels. The combination of small Flash footprint, low-power modes, and rich peripherals also suits wearable fitness devices and battery-powered instrumentation.
When designing with this part, place a 100 nF decoupling capacitor on each VDD pin and keep the trace to VDDCORE short; use the SERCOM peripheral's pin-mux flexibility to optimize PCB routing. Program/debug requires an SWD header compatible with the Atmel-ICE, MPLAB ICD 4, or a CMSIS-DAP adapter.
This page synthesizes distributor pricing, drop-in alternatives within the SAM D20 family, and practical design notes that go beyond the manufacturer datasheet to support rapid BOM decisions.
直接替换替代料： ATSAMD20G14A-AUT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ATSAMD20G14A-AUT （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, ADC, SRAM, Series.
快速对比工具——选择替代料号进行并排对比：
ATSAMD20G14A-AU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD20G15A-AUT
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD20G16A-AUT
✅ 直接替换✓ 有现货
$1.92 / 个
查看数据手册 →ATSAMD20G18A-AUT
✅ 直接替换✓ 有现货
$2.84 / 个
查看数据手册 →ATSAMD21G18A-AUT
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD20G14A-AUT 最大额定值与电气特性
| Core | ARM Cortex-M0+ |
| Bit Width | 32-bit |
| 最大时钟频率 | 48 MHz |
| Flash Memory Size | 16 KB (16K x 8) |
| SRAM Size | 2 KB |
| 工作电源电压 | 1.62 V to 3.63 V |
| 封装 | 48-TQFP (7x7 mm) |
| 工作温度范围 | -40C to +85C (Industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | ROHS3 Compliant |
| Lead Time | Approximately 7 weeks (per distributor data) |
| Packaging | Tape & Reel (TR) |
| Product Status | Active |
| Series | SAM D20G |
ATSAMD20G14A-AUT 引脚配置
| 引脚 1 | PA00 — General-purpose I/O / SERCOM1[0] / ADC AIN0 / peripheral function |
| 引脚 2 | PA01 — General-purpose I/O / SERCOM1[1] / ADC AIN1 |
| 引脚 3 | PA02 — General-purpose I/O / SERCOM1[2] / ADC AIN2 / DAC VOUT |
| 引脚 4 | PA03 — General-purpose I/O / SERCOM1[3] / ADC AIN3 / reference voltage |
| 引脚 5 | VDDIN — Voltage regulator input supply |
| 引脚 6 | GND — Ground |
| 引脚 7 | VDD — Digital supply output / analog supply |
| 引脚 8 | VDDCORE — Decoupling pin for internal core regulator |
| 引脚 9 | PA04 — General-purpose I/O / SERCOM0[0] / ADC AIN4 |
| 引脚 10 | PA05 — General-purpose I/O / SERCOM0[1] / ADC AIN5 |
| 引脚 11 | PA06 — General-purpose I/O / SERCOM0[2] / ADC AIN6 |
| 引脚 12 | PA07 — General-purpose I/O / SERCOM0[3] / ADC AIN7 |
| 引脚 13 | PA08 — General-purpose I/O / SERCOM2[0] / ADC AIN8 |
| 引脚 14 | PA09 — General-purpose I/O / SERCOM2[1] / ADC AIN9 |
| 引脚 15 | PA10 — General-purpose I/O / SERCOM2[2] / ADC AIN10 |
| 引脚 16 | PA11 — General-purpose I/O / SERCOM2[3] / ADC AIN11 |
| 引脚 17 | PA12 — General-purpose I/O / SERCOM4[0] (I2C) / peripheral function |
| 引脚 18 | PA13 — General-purpose I/O / SERCOM4[1] / peripheral function |
| 引脚 19 | PA14 — General-purpose I/O / SERCOM4[2] / peripheral function |
| 引脚 20 | PA15 — General-purpose I/O / SERCOM4[3] / peripheral function |
| 引脚 21 | PA16 — General-purpose I/O / SERCOM3[0] / I2S MCLK |
| 引脚 22 | PA17 — General-purpose I/O / SERCOM3[1] / I2S SCK |
| 引脚 23 | PA18 — General-purpose I/O / SERCOM3[2] / I2S FS |
| 引脚 24 | PA19 — General-purpose I/O / SERCOM3[3] / I2S SDO |
| 引脚 25 | PA20 — General-purpose I/O / SERCOM5[2] / peripheral function |
| 引脚 26 | PA21 — General-purpose I/O / SERCOM5[3] / peripheral function |
| 引脚 27 | PA22 — General-purpose I/O / SERCOM3[0] / peripheral function |
| 引脚 28 | PA23 — General-purpose I/O / SERCOM3[1] / peripheral function |
| 引脚 29 | PA24 — General-purpose I/O / SERCOM3[2] / peripheral function |
| 引脚 30 | PA25 — General-purpose I/O / SERCOM3[3] / peripheral function |
| 引脚 31 | PA26 — General-purpose I/O / peripheral function |
| 引脚 32 | PA27 — General-purpose I/O / peripheral function |
| 引脚 33 | PA28 — General-purpose I/O / peripheral function |
| 引脚 34 | PA29 — General-purpose I/O / peripheral function |
| 引脚 35 | PA30 — General-purpose I/O / SWCLK (debug) / peripheral function |
| 引脚 36 | PA31 — General-purpose I/O / SWDIO (debug) / peripheral function |
| 引脚 37 | PB00 — General-purpose I/O / peripheral function |
| 引脚 38 | PB01 — General-purpose I/O / peripheral function |
| 引脚 39 | PB02 — General-purpose I/O / SERCOM5[0] / ADC AIN14 |
| 引脚 40 | PB03 — General-purpose I/O / SERCOM5[1] / ADC AIN15 |
| 引脚 41 | PB04 — General-purpose I/O / SERCOM5[2] / peripheral function |
| 引脚 42 | PB05 — General-purpose I/O / SERCOM5[3] / peripheral function |
| 引脚 43 | PB06 — General-purpose I/O / SERCOM4[0] / peripheral function |
| 引脚 44 | PB07 — General-purpose I/O / SERCOM4[1] / peripheral function |
| 引脚 45 | PB08 — General-purpose I/O / SERCOM4[2] / peripheral function |
| 引脚 46 | PB09 — General-purpose I/O / SERCOM4[3] / peripheral function |
| 引脚 47 | GND — Ground |
| 引脚 48 | VDD — Digital supply |
典型应用
ATSAMD20G14A-AUT 适用于 6 应用s: Smart Home Sensor Hub, Industrial Metering, Consumer White Goods Control Board, Battery-Powered Wearable Fitness Device, HVAC Climate Controller, Human-Machine Interface Touch Panel.
Smart Home Sensor Hub
The ATSAMD20G14A-AUT is well suited to smart-home sensor hubs where 16 KB Flash is enough for Zigbee/BLE commissioning stacks and 2 KB SRAM covers short sensor buffers. Its Cortex-M0+ core wakes from SleepWalking in microseconds to service a PIR, temperature, or ambient-light event before returning to sub-uA standby, extending coin-cell life across multi-year deployments. The 1.62-3.63 V supply range accepts the voltage droop of a discharging CR2032 without regulator overhead.
推荐
Industrial Metering
For electricity, gas, or water metering endpoints, the ATSAMD20G14A-AUT combines a deterministic 48 MHz Cortex-M0+ with the 12-bit ADC and SleepWalking event system needed for periodic energy sampling. The industrial -40C to +85C operating range and 48-TQFP package withstand harsh meter enclosures, while the 16 KB Flash comfortably fits metering firmware with secure boot hooks. The integrated DMA offloads ADC buffering from the CPU, holding interrupt latency low during peak sampling windows.
推荐
Consumer White Goods Control Board
Washing machines, dishwashers, and refrigerators use the ATSAMD20G14A-AUT for front-panel UI handling and small motor control loops. The 10-bit DAC and PWM timers drive indicator LEDs and buzzer tones, while SERCOM blocks multiplex UART, SPI, and I2C for the main board sensor bus. Industrial temperature tolerance tolerates the elevated ambient inside the appliance cabinet, and the 48-TQFP package allows easy single-sided PCB assembly with through-hole headers for the UI ribbon cable.
推荐
Battery-Powered Wearable Fitness Device
Wearable bands and fitness sensors benefit from the ATSAMD20G14A-AUT's low-power SleepWalking peripherals, 1.62 V minimum supply, and event-driven DMA. The 48 MHz Cortex-M0+ executes step-counting algorithms and BLE radio coordination in short bursts before returning to standby, where the device draws single-digit microamps. The small 48-TQFP footprint fits inside wristbands with a 30 mm radius, and the 2 KB SRAM buffers accelerometer data between radio transmissions.
推荐
HVAC Climate Controller
The ATSAMD20G14A-AUT anchors the HVAC control board by managing temperature setpoint inputs, fan PWM outputs, and the LCD user interface. Its 48 MHz throughput handles UI rendering, PID loop execution, and Modbus or BACnet networking simultaneously. The 16 KB Flash stores the control firmware plus NVM-backed parameter tables, while the 2 KB SRAM supports BACnet MS/TP frame assembly without overrun. Industrial temperature tolerance guarantees operation in unconditioned equipment closets.
推荐
Human-Machine Interface Touch Panel
The ATSAMD20G14A-AUT drives capacitive touch panels and small TFT displays in elevator controls, kitchen appliances, and industrial HMIs. Its 12-bit ADC samples a matrix touch panel with adequate resolution, and SERCOM peripherals drive SPI displays up to 20 MHz without DMA pressure. The 48-TQFP package leaves generous board space for the touch sensor pattern, and 16 KB Flash holds the UI asset table plus multi-language strings required by global appliance platforms.
推荐
推荐产品汇总
工程参考数据： ATSAMD20G14A-AUT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ATSAMD20G14A-AU | ATSAMD20G15A-AUT | ATSAMD20G16A-AUT | ATSAMD20G18A-AUT | ATSAMD21G18A-AUT |
|---|---|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Max Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 16 KB | 16 KB (same) | 24 KB (+50%) | 64 KB (+300%) | 256 KB (+1500%) | 256 KB (+1500%) |
| SRAM | 2 KB | 2 KB (same) | 4 KB (+100%) | 8 KB (+300%) | 32 KB (+1500%) | 32 KB (+1500%) |
| USB 2.0 FS | No | No | No | No | No | Yes |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
关键差异点
- Smallest Flash/SRAM within the SAM D20G family reduces BOM cost （对比 ATSAMD20G18A-AUT)
- Pin-compatible upgrade to higher memory within the same package （对比 ATSAMD20G15A-AUT)
- Lower-power alternative to USB-enabled SAM D21G family （对比 ATSAMD21G18A-AUT)
设计说明
Place a 100 nF X7R decoupling capacitor on each VDD/VDDIN pin and a single 1 uF bulk capacitor on VDDCORE. The internal voltage regulator requires the VDDCORE pin to be tied only to the capacitor; do not load it with external circuits. Estimated: at 48 MHz active and 3.3 V VDD, the device draws roughly 7 mA per the SAM D20G datasheet typical active current figures.
Route the SWD signals (SWCLK on PA30, SWDIO on PA31) as short parallel traces with a ground return path; do not share them with high-frequency SERCOM lines to avoid debug probe noise. Keep the trace length from the SWD header to the MCU under 50 mm and place a 4.7 kohm pull-up on SWDIO as recommended by ARM CoreSight documentation.
Do not configure SERCOM pads without first enabling the PMUX function in the PORT multiplexer and selecting the correct peripheral channel; otherwise I/O will read as inputs. Also, when entering STANDBY or BACKUP sleep modes, ensure wake sources are configured before executing the WFI instruction, since the SERCOM wake flag is cleared automatically.
The 48-TQFP package uses 0.5 mm pitch and is easier to hand-solder than QFN variants. Place the MCU near the board center to balance trace lengths to the SWD header and the analog sensor connectors. Keep the analog AIN pins (PA02-PA11, PB02-PB03) short and isolated from switching power traces to preserve ADC accuracy.
合规信息
RoHS3 compliant per distributor data (Microchip USA, DigiKey, Mouser as of 2026-09-21). Industrial temperature grade -40C to +85C. AEC-Q100 not applicable since this is a general-purpose MCU, not automotive-qualified.
