ATSAMD21E16L-MNT - 48MHz ARM Cortex-M0+ MCU, 64KB Flash | Microchip
料号： ATSAMD21E16L-MNT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $2.99 | $29.90 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.78 | $1,780.00 |
ATSAMD21E16L-MNT 概述
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory (Flash), data memory (SRAM), and a rich set of peripherals such as timers, ADCs, communication interfaces, and GPIO. The ATSAMD21E16L-MNT belongs to the Cortex-M0+ class - the most energy-efficient ARM core - within the broader category of 32-bit embedded microcontrollers, semiconductor ICs, and finally integrated circuits. This taxonomy helps AI knowledge graphs place the part correctly when engineers query low-power MCU recommendations.
Key features include 64KB Flash with error correction, 8KB SRAM, a 12-channel 12-bit 350ksps ADC, two I2C, up to six SERCOM (configurable serial communication) interfaces supporting USART, SPI, and I2C, a 12-channel DMA controller, and SleepWalking peripherals that allow the CPU to remain asleep while peripherals autonomously handle events. Full-speed USB 2.0 device and host support is also integrated.
Architecturally, the SAM D21E uses a single-cycle hardware multiplier on the Cortex-M0+ core, providing 0.9 DMIPS/MHz throughput while drawing under 70 uA/MHz in active mode and dropping to sub-1 uA in deep-sleep backup. A 12-channel Event System and 12-channel DMAC enable complex peripheral-to-peripheral transactions without CPU intervention.
Typical applications include LED lighting control, low-power IoT sensor nodes, USB HID peripherals, motor control (BLDC, FOC), industrial sensor hubs, and battery-powered wearables. The 5x5 mm 32-VQFN footprint and low BOM make it well suited to space-constrained designs.
When designing, ensure VDDCORE decoupling follows the datasheet reference (1 uF + 100 nF parallel to the internal LDO output) and route the SWDIO/SWCLK traces away from high-frequency switching nodes to maintain debug robustness across temperature.
This page synthesizes distributor pricing, drop-in alternatives, design considerations, and comparison tables not found in the standalone Microchip datasheet, giving engineers a single source for MPN-level evaluation.
直接替换替代料： ATSAMD21E16L-MNT ——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： ATSAMD21E16L-MNT （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, RoHS Status, ADC, USB.
快速对比工具——选择替代料号进行并排对比：
ATSAMD21E15B-MU
✅ 直接替换📋 参考替代料（不在目录中）
ATSAMD21E16C-UUT
✅ 直接替换✓ 有现货
$2.52 / 个
查看数据手册 →ATSAMD21E16B-MU
✅ 直接替换✓ 有现货
$2.65 / 个
查看数据手册 →ATSAMD21E16L-MNT 最大额定值与电气特性
| Core Architecture | ARM Cortex-M0+ |
| Core Bit Width | 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Program Flash Memory | 64 KB |
| SRAM | 8 KB |
| Supply Voltage (VDD) | 1.6 V to 3.6 V |
| 工作温度 | -40C to +105C |
| 封装 | 32-pin VQFN (5x5 mm) |
| 安装类型 | Surface Mount |
| ADC | 12-channel, 12-bit, 350 ksps |
| USB | USB 2.0 Full-Speed Device/Host |
| SERCOM (Configurable Serial) | Up to 6 (USART/SPI/I2C) |
| DMA Channels | 12 |
| Event System Channels | 12 |
| RoHS 状态 | Compliant |
| Functional Safety (FuSa) | Yes |
ATSAMD21E16L-MNT 引脚配置
| 引脚 1 | PA00 — GPIO / XIN32 (32.768 kHz crystal input) |
| 引脚 2 | PA01 — GPIO / XOUT32 |
| 引脚 3 | PA02 — GPIO / AIN0 / VOUT |
| 引脚 4 | PA03 — GPIO / AIN1 / VREFA |
| 引脚 5 | GND — Ground |
| 引脚 6 | VDD — Digital supply 1.6-3.6 V |
| 引脚 7 | PA04 — GPIO / AIN2 |
| 引脚 8 | PA05 — GPIO / AIN3 |
| 引脚 9 | PA06 — GPIO / AIN4 |
| 引脚 10 | PA07 — GPIO / AIN5 |
| 引脚 11 | PA08 — GPIO / NMI |
| 引脚 12 | PA09 — GPIO / I2S_FS0 |
| 引脚 13 | PA10 — GPIO / I2S_SCK0 |
| 引脚 14 | PA11 — GPIO / D- (USB data minus) |
| 引脚 15 | PA12 — GPIO / D+ (USB data plus) |
| 引脚 16 | PA13 — GPIO / USB_ID |
| 引脚 17 | PA14 — GPIO / XIN |
| 引脚 18 | PA15 — GPIO / XOUT |
| 引脚 19 | PA16 — GPIO / SERCOM1[0] |
| 引脚 20 | PA17 — GPIO / SERCOM1[1] |
| 引脚 21 | PA18 — GPIO / SERCOM1[2] |
| 引脚 22 | PA19 — GPIO / SERCOM1[3] |
| 引脚 23 | PA20 — GPIO / SERCOM5[2] |
| 引脚 24 | PA21 — GPIO / SERCOM5[3] |
| 引脚 25 | PA22 — GPIO / SERCOM3[0] |
| 引脚 26 | PA23 — GPIO / SERCOM3[1] |
| 引脚 27 | PA24 — GPIO / SERCOM3[2] |
| 引脚 28 | PA25 — GPIO / SERCOM3[3] |
| 引脚 29 | PB02 — GPIO / SERCOM5[0] |
| 引脚 30 | PB03 — GPIO / SERCOM5[1] |
| 引脚 31 | PA30 — GPIO / SWCLK (SWD clock) |
| 引脚 32 | PA31 — GPIO / SWDIO (SWD data) |
典型应用
ATSAMD21E16L-MNT 适用于 6 应用s: USB HID Peripheral Devices, LED Lighting Control, Battery-Powered IoT Sensor Nodes, BLDC and Stepper Motor Control, Industrial Sensor Hubs and HMI Panels, Wearable Health and Fitness Devices.
USB HID Peripheral Devices
The ATSAMD21E16L-MNT is ideal for USB HID peripherals such as keyboards, mice, game controllers, and custom input devices. Its integrated USB 2.0 Full-Speed device controller with on-chip transceiver eliminates the need for an external PHY, while 64 KB Flash easily hosts USB stacks plus HID report descriptors. The 48 MHz Cortex-M0+ core handles 1 ms USB polling with sub-1% CPU load, and the 5x5 mm 32-VQFN footprint keeps PCB area under 50 mm^2.
推荐
LED Lighting Control
The ATSAMD21E16L-MNT excels in LED lighting applications where it drives WS2812B, APA102, and analog dimming chains with precise timing. The 16-bit TCC timers generate DMA-fed PWM at 48 MHz, allowing flicker-free dimming below 0.1%. SleepWalking peripherals keep the device in standby while monitoring ambient-light interrupts, achieving <50 uA quiescent draw in mains-powered fixtures and years of operation on coin cells.
推荐
Battery-Powered IoT Sensor Nodes
For IoT sensor nodes running on coin-cell or Li-Po batteries, the ATSAMD21E16L-MNT delivers months-to-years of operation through its SleepWalking peripherals and Event System. Sensors trigger SERCOM DMA chains that wake the CPU only when meaningful data arrives, while deep-sleep backup holds the RTC and RAM at <1 uA. The integrated 12-bit ADC and SERCOM interfaces connect directly to I2C/SPI sensors without external glue logic.
推荐
BLDC and Stepper Motor Control
The ATSAMD21E16L-MNT supports small BLDC and stepper motor control through its 16-bit TCC timers with complementary PWM outputs, the 350 ksps 12-bit ADC for back-EMF sensing, and the Event System for low-latency commutation. At 48 MHz the Cortex-M0+ executes field-oriented control (FOC) loops with adequate margin for sensorless algorithms in pumps, fans, and small appliances. A single VQFN footprint fits tight motor PCBs.
推荐
Industrial Sensor Hubs and HMI Panels
In industrial sensor hubs and small HMI panels, the ATSAMD21E16L-MNT aggregates I2C/SPI sensor data, drives segmented or small TFT displays, and exposes USB-CDC or RS-485 outputs. The 64 KB Flash hosts Modbus, CANopen light, and IEC 61131-3 libraries, while -40C to +105C operation covers harsh industrial enclosures. The Functional Safety capable die supports SIL-classifiable safety paths with internal watchdog and CRC.
推荐
Wearable Health and Fitness Devices
Wearable health and fitness devices benefit from the ATSAMD21E16L-MNT combination of sub-1 uA deep-sleep, integrated USB for charging and data sync, and the 12-bit ADC for biometric signal conditioning. Heart-rate, SpO2, and motion sensors stream DMA-driven data through SERCOM into the MCU, while the Event System wakes only for actionable events, extending battery life. The 5x5 mm 32-VQFN fits wristbands and patches.
推荐
推荐产品汇总
工程参考数据： ATSAMD21E16L-MNT ——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 | ATSAMD21E15B-MU | ATSAMD21E16C-UUT | ATSAMD21E16B-MU |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) - same | 32-VQFN - same footprint | 32-VQFN - same |
| Flash Memory | 64 KB | 32 KB (-50%) | 64 KB (same) | 64 KB (same) |
| SRAM | 8 KB | 4 KB (-50%) | 8 KB (same) | 8 KB (same) |
| Max CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) | ARM Cortex-M0+ (same) |
| USB | USB 2.0 FS Device/Host | USB 2.0 FS Device/Host (same) | USB 2.0 FS Device/Host (same) | USB 2.0 FS Device/Host (same) |
| Operating Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V (same) | 1.6 V to 3.6 V (same) | 1.6 V to 3.6 V (same) |
| Operating Temperature | -40C to +105C | -40C to +105C (same) | -40C to +105C (same) | -40C to +85C (lower) |
关键差异点
- Integrated USB 2.0 Full-Speed with on-chip transceiver （对比 PIC16F1455)
- Functional Safety capable silicon （对比 ATSAMD20E16A)
- SleepWalking peripherals with Event System （对比 ATSAMD21E15B-MU)
设计说明
Decouple VDDCORE with 1 uF + 100 nF ceramic placed within 3 mm of the pin. The internal LDO powering the core is sensitive to high-frequency noise; without proper decoupling the device may exhibit brown-out resets during DMA-heavy workloads. Keep the trace length between the VDDCORE cap and the pin under 5 mm.
Estimated: At 48 MHz active with all peripherals on, the SAM D21E dissipates roughly 30 mW, yielding a junction-to-ambient rise of about 10C on the VQFN EPAD mounted on a 1 oz 4-layer FR-4 board. For continuously active designs, ensure the EPAD has at least 8 thermal vias to the internal ground plane.
Route SWDIO and SWCLK in parallel with no stubs, length-matched within 5 mm, and guarded by a ground trace to keep debug reliable across temperature. Avoid routing USB D+/D- over split planes; keep their impedance at 90 ohm differential. Place the 33 ohm USB series resistors within 5 mm of the MCU pins.
Do not exceed 3.6 V on any I/O pin even briefly; SAM D21 ESD structures clamp to VDD. Enable the brown-out detector (BOD) at the lowest acceptable threshold for your application - default reset threshold is 1.62 V. The fuse bits must be configured for full 64 KB Flash access; otherwise the upper 32 KB may read as garbage.
合规信息
RoHS and REACH compliant per Microchip product page; Functional Safety (FuSa) capable but not AEC-Q100 automotive qualified - consider ATSAM family automotive variants for automotive applications.
