ATSAMD20E14B-AUT - 48MHz Cortex-M0+ MCU, 16KB Flash, 32-TQFP | Microchip
料号： ATSAMD20E14B-AUT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.42 | $24.20 |
| 100 | $1.95 | $195.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.38 | $1,380.00 |
| 2,500 | $1.21 | $3,025.00 |
ATSAMD20E14B-AUT 概述
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) MCU designed for ultra-low power embedded applications. It belongs to the broader ARM Cortex-M processor family, which sits inside the hierarchy: ARM Cortex-M -> 32-bit MCU -> microcontroller -> embedded IC. The M0+ core uses the Thumb/Thumb-2 instruction set, a single-cycle multiplier, and a tightly coupled NVIC interrupt controller. Compared with 8-bit MCUs such as the PIC16F series, the M0+ offers higher code density, modern toolchain support, deterministic interrupt latency, and far better DMIPs/mW efficiency, while still consuming minimal power.
Key features of the ATSAMD20E14B-AUT include: ARM Cortex-M0+ core with Single-cycle multiplier, hardware divide, and debug access via SWD; 16 KB Flash and 2 KB SRAM with in-application programmable flash; 6 SERCOM (configurable serial communication) interfaces supporting I2C, SPI, and USART simultaneously; 12-bit ADC with up to 350 ksps throughput and 10 channels; up to 14 touch-channel support via the Peripheral Touch Controller (PTC); and 1.62V to 3.63V single-supply operation with on-chip voltage regulator.
Technically, the SAM D20E integrates an 8-channel Event System, 6-channel DMA controller, Real-Time Counter (RTC), and multiple 16-bit Timer/Counters (TC). Memory protection is provided through a configurable flash access window, and security is enhanced by a 128-bit unique chip ID. The part supports Sleep, Idle, Standby, and Backup sleep modes with fast wake-up, drawing as little as a few microamps in deep-sleep, which is critical for battery-powered IoT endpoints.
Typical applications include IoT sensor nodes, smart-home wireless controllers (when paired with an ATWINC1500 Wi-Fi module), industrial motor control boards (using the TC/PWM channels), battery-powered metering devices such as water/gas meters, consumer HMI products with touch-button UIs, and low-cost wearable electronics. The SERCOM flexibility lets the MCU speak multiple protocols concurrently without external glue logic.
When designing with this part, allocate the 32-pin TQFP's VDD/GND pair to a star-ground layout with 100 nF + 1 uF decoupling close to each supply pin. Use the SERCOM pins thoughtfully because pin mapping to each SERCOM is multiplexed across the 32 TQFP pins, and choosing early avoids PCB rework. For low-power battery designs, leverage the integrated PTC for cap-touch wake-up, avoiding external wake controllers.
This page synthesizes distributor pricing, validated drop-in alternatives (same Microchip family), and engineering notes for the ATSAMD20E14B-AUT in one place - data not consolidated in the manufacturer datasheet.
直接替换替代料： ATSAMD20E14B-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： ATSAMD20E14B-AUT （相同外形与封装尺寸） ——差异在于 ADC, Package, Flash Memory, MSL Level, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
ATSAMD20E14B-AU
✅ 直接替换✓ 有现货
$1.45 / 个
查看数据手册 →ATSAMD20E15B-AUT
✅ 直接替换✓ 有现货
$2.52 / 个
查看数据手册 →ATSAMD20E16B-AUT
✅ 直接替换✓ 有现货
$2.45 / 个
查看数据手册 →ATSAMD20E14B-AZT
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD20E14A-AN
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →ATSAMD20E14B-MUT
✅ 直接替换✓ 有现货
$0.95 / 个
查看数据手册 →ATSAMD20E14B-AUT 最大额定值与电气特性
| Core | ARM Cortex-M0+ (32-bit, single-core) |
| Maximum Clock Speed | 48 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| 电源电压 | 1.62 V to 3.63 V |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 32-TQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Number of I/O Pins | 26 |
| SERCOM Interfaces | 6 (configurable: I2C/SPI/USART) |
| ADC | 12-bit, up to 350 ksps, 10 channels |
| DAC | 10-bit, 1 channel |
| Timers/Counters | Multiple 16-bit TC, 1 RTC |
| Touch Channels (PTC) | Up to 14 |
| DMA | 6 channels |
| Event System | 8 channels |
| Watchdog Timer | Yes (window mode) |
| MSL 等级 | MSL3 |
| RoHS 状态 | Compliant |
| AEC-Q100 | Not qualified (industrial grade only) |
ATSAMD20E14B-AUT 引脚配置
| 引脚 1 | PA00 — GPIO/SERCOM1[0]/EIC/TC2 |
| 引脚 2 | PA01 — GPIO/SERCOM1[1]/EIC/TC2 |
| 引脚 3 | PA02 — GPIO/SERCOM0[0]/ADC0[0] |
| 引脚 4 | PA03 — GPIO/SERCOM0[1]/ADC0[1] |
| 引脚 5 | GND — Ground |
| 引脚 6 | VDD — Digital supply voltage |
| 引脚 7 | PA04 — GPIO/SERCOM0[2]/ADC0[4]/TC0 |
| 引脚 8 | PA05 — GPIO/SERCOM0[3]/ADC0[5]/TC0 |
| 引脚 9 | PA06 — GPIO/SERCOM0[4]/ADC0[6]/TC1 |
| 引脚 10 | PA07 — GPIO/SERCOM0[5]/ADC0[7]/TC1 |
| 引脚 11 | PA08 — GPIO/SERCOM1[2]/TC2/PTC |
| 引脚 12 | PA09 — GPIO/SERCOM1[3]/TC2/PTC |
| 引脚 13 | PA10 — GPIO/SERCOM2[2]/TC3/PTC |
| 引脚 14 | PA11 — GPIO/SERCOM2[3]/TC3/PTC |
| 引脚 15 | PA12 — GPIO/SERCOM2[0]/PTC |
| 引脚 16 | PA13 — GPIO/SERCOM2[1]/PTC |
| 引脚 17 | PA14 — GPIO/SERCOM3[2]/TC4 |
| 引脚 18 | PA15 — GPIO/SERCOM3[3]/TC4 |
| 引脚 19 | PA16 — GPIO/SERCOM3[0]/I2S-SD |
| 引脚 20 | PA17 — GPIO/SERCOM3[1]/I2S-MCK |
| 引脚 21 | PA18 — GPIO/SERCOM3[2]/I2S-FS |
| 引脚 22 | PA19 — GPIO/SERCOM3[3]/I2S-BCK |
| 引脚 23 | PA20 — GPIO/SERCOM5[2]/TC5 |
| 引脚 24 | PA21 — GPIO/SERCOM5[3]/TC5 |
| 引脚 25 | PA22 — GPIO/SERCOM3[0]/TC6 |
| 引脚 26 | PA23 — GPIO/SERCOM3[1]/TC6 |
| 引脚 27 | PA24 — GPIO/SERCOM5[0]/USB_DM |
| 引脚 28 | PA25 — GPIO/SERCOM5[1]/USB_DP |
| 引脚 29 | RESET — Reset input (active low) |
| 引脚 30 | VDD — Digital supply voltage |
| 引脚 31 | GND — Ground |
| 引脚 32 | PA30 — GPIO/SERCOM1[0]/SWDIO (programming data) |
典型应用
ATSAMD20E14B-AUT 适用于 6 应用s: IoT Wireless Sensor Nodes, Smart Home Hubs and Appliance Controllers, Industrial Metering and Sensor Conditioning, Consumer Wearable Devices, Touch Button Interfaces (Capacitive HMI), Battery-Powered Wireless Remote Controls.
IoT Wireless Sensor Nodes
The ATSAMD20E14B-AUT fits wireless IoT sensor nodes thanks to its 48 MHz Cortex-M0+ core, 6 SERCOM interfaces for SPI-based radios, and ultra-low deep-sleep current. The 16 KB flash holds small IoT protocol stacks or custom firmware, while the 2 KB SRAM supports sensor buffers and network queues. Placed as the main MCU beside an ATWINC1500 Wi-Fi or SAM R34 LoRa module, the M0+ runs network housekeeping in <1 mA active while the radio handles RF. The 12-bit ADC with 10 channels reads temperature, humidity, and analog sensors without an external ADC, and the 14-channel PTC supports cap-touch wake-up, eliminating an external wake controller.
推荐
Smart Home Hubs and Appliance Controllers
Smart-home and appliance controllers leverage the ATSAMD20E14B-AUT's 6 SERCOMs to talk simultaneously to Wi-Fi/BLE modules, sensors, and human-interface peripherals. The 12-bit ADC monitors analog inputs from potentiometers or temperature probes, while the 16-bit Timer/Counter channels drive PWM-controlled motor speeds in fans, blenders, or HVAC dampers. With 26 GPIO pins exposed on the 32-TQFP, the design can host LED drivers, keypad matrices, and LCD interfaces without expanding. The Cortex-M0+ easily runs capacitive touch button decoding and BLE command handling for appliances like air purifiers and washing-machine controls.
推荐
Industrial Metering and Sensor Conditioning
The ATSAMD20E14B-AUT is widely used in industrial water, gas, and electricity meters because of its low-power Cortex-M0+ core, integrated 12-bit ADC, and reliable RTC. The 16-bit Timer/Counters precisely measure pulse trains from flow sensors, while the DMA engine copies ADC sample blocks to SRAM without CPU intervention, reducing CPU load to <5%. The 1.62V to 3.63V supply range supports direct connection to single-cell Li-ion or 3.6V alkaline battery stacks, and the deep-sleep current extends battery life to 10+ years in low-duty metering applications. The 8-channel Event System and SERCOM interfaces support communication with metering radio modules such as SAM R34 or external MBus modules.
推荐
Consumer Wearable Devices
The ATSAMD20E14B-AUT powers cost-sensitive wearables like fitness bands, smartwatches (with companion BLE), and pulse-oximetry bands. Its Cortex-M0+ core delivers the responsiveness needed for sensor fusion while consuming minimal power, enabling weeks of runtime on small Li-Po batteries. The 6 SERCOMs connect the M0+ to a BLE radio, a heart-rate sensor (like the MAX30102), a 6-axis IMU (LSM6DSO), and an OLED display over SPI or I2C. The integrated PTC provides cap-touch buttons for user interaction without adding mechanical switches. The compact 32-TQFP (7x7 mm) footprint fits inside thin watch-style enclosures.
推荐
Touch Button Interfaces (Capacitive HMI)
The ATSAMD20E14B-AUT's Peripheral Touch Controller (PTC) supports up to 14 capacitive touch channels, which is sufficient to build a fully featured touch-button user interface on a single MCU without external touch ICs. The internal hardware auto-calibrates for drift compensation, freeing the Cortex-M0+ from continuous scan servicing. Typical designs include kitchen appliances, induction cooktops, audio volume sliders, and automotive cabin controls. The M0+ core can also drive an LED or LCD display next to the touch pads, providing visual feedback. Power consumption is minimized by auto-scanning PTC during deep-sleep.
推荐
Battery-Powered Wireless Remote Controls
The ATSAMD20E14B-AUT is ideal for handheld remote controls, including RF remote controls for industrial cranes, garage-door openers, and BLE gaming controllers. The Cortex-M0+ executes button-debouncing, battery voltage monitoring via the 12-bit ADC, and a low-power RF transmit protocol, all within the 16 KB flash budget. Deep-sleep current of a few microamps yields years of battery life on two AAA cells; the 1.62V supply floor supports operation down to battery exhaustion. The integrated RTC provides periodic wake-up for button polling, and the SERCOM USART drives an inexpensive 433/868 MHz transmitter like the SAM R34.
推荐
推荐产品汇总
工程参考数据： ATSAMD20E14B-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 | ATSAMD20E14B-AU | ATSAMD20E15B-AUT | ATSAMD20E16B-AUT | ATSAMD20E14B-AZT | ATSAMD20E14A-AN |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-TQFP (7x7) | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same | 32-TQFP (7x7) - same |
| Core | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz | Cortex-M0+ 48 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB | 64 KB | 16 KB | 16 KB |
| SRAM | 2 KB | 2 KB | 4 KB | 8 KB | 2 KB | 2 KB |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (AEC-Q100) | -40C to +85C |
| SERCOM Interfaces | 6 | 6 | 6 | 6 | 6 | 6 |
| AEC-Q100 Qualified | No | No | No | No | Yes | No |
| Approx. Price (qty 1) | $2.85 | $2.85 (similar) | $3.40 | $3.95 | $3.65 (auto grade) | $2.85 (similar) |
关键差异点
- Industrial temperature grade with full Cortex-M0+ performance （对比 ATSAMD20E14B-AZT (automotive grade))
- Upgradable memory without PCB changes （对比 ATSAMD20E15B-AUT (32 KB flash))
- Lowest-cost entry into ARM Cortex-M0+ 32-TQFP family （对比 ATSAMD20E16B-AUT (64 KB flash))
设计说明
Place a 100 nF decoupling capacitor within 5 mm of each VDD pin (pins 6 and 30 on the 32-TQFP) and a bulk 4.7 uF near the chip. Use separate analog and digital grounds tied at a single point near the IC. For battery-powered designs, leverage the SAM D20's deep-sleep mode (~3 uA with RTC running) and peripheral wake-on-touch to maximize battery life to multi-year spans on two AAA cells.
Route the SWD signals (SWDIO on PA30, SWCLK on PA31) away from high-frequency switching nodes and keep them under 10 cm to maintain debug reliability. The 32-TQFP at 0.8 mm pitch can be routed on a 4-layer board with 0.2 mm traces; for 2-layer designs, place the MCU on the top side with the SERCOM SPI signals going straight down to pads. Maintain continuous ground pour on the bottom layer for EMI reduction.
When the SERCOM peripherals are configured for SPI at high speeds (>10 MHz) or for I2C Fast-Mode Plus (1 MHz), series-terminate clock lines with 22-33 ohm resistors to suppress ringing. Keep SERCOM trace lengths matched within 5 mm across the 32-TQFP package. The integrated DMA controller offloads high-speed data transfers without CPU intervention, freeing clock cycles for application logic.
Estimated: never tie RESET directly to VDD - always use an external pull-up (typically 10 kohm) and a 1 nF capacitor for clean power-on reset behavior. The brown-out detector (BOD) must be enabled in the FUSE settings or the MCU may behave erratically at supply voltages below 1.62 V. When migrating from ATSAMD20E14A revision to revision B, review the errata document for ADC calibration differences.
合规信息
RoHS compliant per Microchip product page. Industrial grade only (-40C to +85C); for AEC-Q100 automotive choose ATSAMD20E14B-AZT instead. Lead-free and halogen-free per Microchip environmental compliance documentation.
