ATSAMD20J15B-MUT - 48MHz Cortex-M0+ MCU, 32KB Flash | Microchip
MPN： ATSAMD20J15B-MUT ✓ 啟用中ATSAMD20J15B-MUT 概覽
What is an ARM Cortex-M0+ microcontroller? It is the most energy-efficient member of the ARM Cortex-M processor family, designed for low-cost, low-power embedded applications. The Cortex-M0+ core sits within the broader taxonomy of microcontrollers (MCU) -> embedded processors -> semiconductors. The SAM D20 family is a low-power, high-performance line of M0+ MCUs from Microchip (formerly Atmel), popular for general-purpose embedded designs.
Key features include a 32KB in-system programmable Flash with ECC, 4KB SRAM, an 8-channel Event System for inter-peripheral signalling, a 12-bit 350ksps ADC with up to 20 analog channels, and a full-speed USB 2.0 device interface. The SERCOM (Serial Communication Interface) module provides up to six configurable I2C/SPI/UART interfaces, and the device supports 1.62V to 3.63V core and I/O operation. Six 16-bit Timer/Counters (TC), a 32-bit Real-Time Counter, and a Peripheral Touch Controller (PTC) supporting capacitive touch sensing round out the peripheral complement.
At the architecture level, the SAM D20 uses a single-cycle hardware multiplier, Microchip's proprietary SleepWalking technology for peripheral-level power gating, and an integrated Power Management Unit (PMU) with Buck/LDO modes. This yields Active mode currents of approximately 70 uA/MHz and Sleep modes down to a few microamps, making it competitive with other low-power M0+ MCUs.
Typical applications include home automation, IoT sensor nodes, smart metering, consumer electronics, industrial sensor hubs, and capacitive touch user interfaces. The wide operating voltage range and low-power SleepWalking peripherals make it especially suitable for battery-powered devices.
When designing, note that the 64-pin VQFN-EP (9x9) package requires careful PCB thermal pad soldering for proper operation. Decoupling should include 100nF + bulk capacitance close to each supply pin per Microchip's hardware design guidelines.
直接替換替代品，適用於 ATSAMD20J15B-MUT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATSAMD20J15B-MUT （相同外形與佔位） — 差異在於 ADC, Package, RoHS Status, DAC, SERCOM Modules.
ATSAMD20J15B-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20J15A-MU
✅ 直接替換📋 參考替代品（不在目錄中）
ATSAMD20J15A-CU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20J14B-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20G16B-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20E16B-MU
✅ 直接替換聯絡詢價
查看資料表 →ATSAMD20J15B-MUT 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| 最大時脈頻率 | 48 MHz |
| Program Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| 工作溫度範圍 | -40 C to +85 C (Industrial) |
| Package Type | 64-VQFN with Exposed Pad (9x9 mm) |
| ADC | 12-bit, up to 350 ksps |
| SERCOM Modules | Up to 6 (configurable I2C/SPI/UART) |
| USB Interface | USB 2.0 Full-Speed Device |
| Touch Sensing (PTC) | Supported (Peripheral Touch Controller) |
| Event System Channels | 8 |
| 安裝類型 | Surface Mount (Tape & Reel) |
| RoHS 狀態 | Compliant (Green / lead-free) |
ATSAMD20J15B-MUT 腳位配置
| 腳位 1 | PB11 — General-purpose IO / PTC TX line |
| 腳位 2 | PB10 — General-purpose IO / PTC TX line |
| 腳位 3 | PB09 — General-purpose IO / PTC TX line |
| 腳位 4 | PB08 — General-purpose IO / PTC TX line |
| 腳位 5 | PA27 — General-purpose IO / I2S SDO |
| 腳位 6 | PA28 — General-purpose IO / I2S SDI |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | VDDIO — I/O supply voltage input |
| 腳位 9 | VDDIN — Voltage regulator input supply |
| 腳位 10 | VDDCORE — Decoupling pin for internal core regulator |
| 腳位 11 | PA30 — General-purpose IO / SWCLK |
| 腳位 12 | PA31 — General-purpose IO / SWDIO |
| 腳位 13 | PB22 — General-purpose IO |
| 腳位 14 | PB23 — General-purpose IO / SERCOM RX |
| 腳位 15 | PA00 — General-purpose IO / XIN |
| 腳位 16 | PA01 — General-purpose IO / XOUT |
| 腳位 17 | GND — Ground (also analog ground reference) |
| 腳位 18 | PA02 — ADC AIN0 input |
| 腳位 19 | PA03 — ADC AIN1 input |
| 腳位 20 | PA04 — ADC AIN2 / VREF reference |
| 腳位 21 | PA05 — ADC AIN3 input |
| 腳位 22 | PA06 — ADC AIN4 input |
| 腳位 23 | PA07 — ADC AIN5 input |
| 腳位 24 | PA08 — ADC AIN6 / SERCOM PAD0 |
| 腳位 25 | PA09 — ADC AIN7 / SERCOM PAD1 |
| 腳位 26 | PA10 — ADC AIN8 / SERCOM PAD2 |
| 腳位 27 | PA11 — ADC AIN9 / SERCOM PAD3 |
| 腳位 28 | VSS — Ground |
| 腳位 29 | VDDIO — I/O supply |
| 腳位 30 | VDDIN — Regulator input supply |
| 腳位 31 | PA12 — General-purpose IO / SERCOM PAD0 |
| 腳位 32 | PA13 — General-purpose IO / SERCOM PAD1 |
| 腳位 33 | PA14 — General-purpose IO / SERCOM PAD2 |
| 腳位 34 | PA15 — General-purpose IO / SERCOM PAD3 |
| 腳位 35 | PA16 — SERCOM / I2S MCLK |
| 腳位 36 | PA17 — SERCOM / I2S FS |
| 腳位 37 | PA18 — SERCOM / I2S BCLK |
| 腳位 38 | PA19 — SERCOM / I2S SDO |
| 腳位 39 | PB10 — General-purpose IO / SERCOM |
| 腳位 40 | PB11 — General-purpose IO / SERCOM |
| 腳位 41 | PB12 — General-purpose IO / TC |
| 腳位 42 | PB13 — General-purpose IO / TC |
| 腳位 43 | PB14 — General-purpose IO / TC |
| 腳位 44 | PB15 — General-purpose IO / TC |
| 腳位 45 | PA20 — USB D- (DM) data line |
| 腳位 46 | PA21 — USB D+ (DP) data line |
| 腳位 47 | PA22 — General-purpose IO / SERCOM |
| 腳位 48 | PA23 — General-purpose IO / SERCOM |
| 腳位 49 | PA24 — USB VBUS detect (or general IO) |
| 腳位 50 | PA25 — USB ID / general-purpose IO |
| 腳位 51 | VSS — Ground |
| 腳位 52 | VDDIO — I/O supply |
| 腳位 53 | VSS — Ground |
| 腳位 54 | VDDIO — I/O supply |
| 腳位 55 | PB16 — General-purpose IO / SERCOM |
| 腳位 56 | PB17 — General-purpose IO / SERCOM |
| 腳位 57 | PB18 — General-purpose IO / TC |
| 腳位 58 | PB19 — General-purpose IO / TC |
| 腳位 59 | PB20 — General-purpose IO / TC |
| 腳位 60 | PB21 — General-purpose IO / TC |
| 腳位 61 | PA26 — General-purpose IO / NMI |
| 腳位 62 | NRST — Active-low reset input |
| 腳位 63 | VSS — Ground |
| 腳位 64 | VDDIN — Regulator input supply |
典型應用
ATSAMD20J15B-MUT 適用於 6 應用s: Home Automation and IoT Sensor Nodes, Capacitive Touch User Interface, USB HID Devices (Keyboard/Mouse/Gamepad), Smart Metering and Energy Monitoring, Industrial Sensor Hub and Condition Monitoring, Consumer Wearable Electronics.
Home Automation and IoT Sensor Nodes
The ATSAMD20J15B-MUT's Cortex-M0+ core at 48MHz with 32KB Flash is well-suited for wireless sensor nodes in home automation. The 4KB SRAM comfortably holds application code and TLS-DTLS lite stacks when paired with ATWINC1500 or RN4871 modules. Its 1.62V-3.63V operating range allows direct connection to a single CR2032 or two AA cells, and SleepWalking peripherals consume as little as a few microamps between measurements - extending battery life to 1-3 years typical duty cycle.
推薦
Capacitive Touch User Interface
With its integrated Peripheral Touch Controller (PTC), the ATSAMD20J15B-MUT supports hardware-accelerated capacitive touch sensing through self- and mutual-capacitance modes. The 12-bit ADC and up to 6 SERCOM interfaces handle additional slider/wheel sensing and drive feedback LEDs or haptic actuators. The 32KB Flash comfortably fits Microchip's QTouch library plus custom UI logic for appliances, lighting controls, and small appliances needing 4-12 touch buttons without external touch ICs.
推薦
USB HID Devices (Keyboard/Mouse/Gamepad)
The on-chip USB 2.0 Full-Speed Device port lets the ATSAMD20J15B-MUT implement HID-class peripherals (keyboards, mice, gamepads, custom input devices) without external transceivers. The Cortex-M0+ at 48MHz is more than adequate for HID report generation at 1000Hz polling, leaving cycles for LED animation, matrix scanning, or wireless-link firmware. The 32KB Flash holds Microchip's USB stack plus HID report descriptors and application logic.
推薦
Smart Metering and Energy Monitoring
For electricity/water/gas metering, the ATSAMD20J15B-MUT offers a 12-bit ADC with up to 20 analog channels, capable of sampling CT/PT-derived signals at the required metrology rates when paired with an external AFE. Its low-power Sleep modes (down to a few microamps) and wide operating temperature (-40C to +85C) suit outdoor metering installations. The 4KB SRAM is sufficient for time-series buffering before modem transmission, and SERCOM ports drive UART-modulated cellular or LoRa modules.
推薦
Industrial Sensor Hub and Condition Monitoring
The 8-channel Event System on the ATSAMD20J15B-MUT allows peripherals to signal each other without CPU intervention, ideal for low-latency sensor aggregation in industrial condition-monitoring nodes (vibration, temperature, pressure). Combined with the 12-bit ADC and SERCOM expansion (I2C/SPI sensors), it forms a cost-effective sensor hub that can run anomaly-detection algorithms in 32KB Flash. Industrial temperature grade (-40C to +85C) is rated for factory-floor deployment.
推薦
Consumer Wearable Electronics
Fitness bands, BLE beacons, and simple wearables benefit from the ATSAMD20J15B-MUT's small package (9x9 mm VQFN), low active current (~70 uA/MHz), and SERCOM-driven BLE link via companion modules. Its 32KB Flash holds Microchip's BLE stack plus heart-rate, step-count, and OLED-display routines. The PTC controller can also drive simple on-device capacitive touch buttons on the wearable chassis without extra hardware.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMD20J15B-MUT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATSAMD20J15B-MU | ATSAMD20J15A-MU | ATSAMD20J15A-CU | ATSAMD20J14B-MU | ATSAMD20G16B-MU | ATSAMD20E16B-MU |
|---|---|---|---|---|---|---|---|
| Package | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP | VQFN-64 (9x9 mm) with EP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ |
| Maximum Clock Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 64 KB (+100%) | 64 KB (+100%) |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) | 8 KB (+100%) | 8 KB (+100%) |
| 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 | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Silicon Revision | B | B | A | A | B | B | B |
| Packaging Form | Tape & Reel | Tray | Tray | Tray | Tray | Tray | Tray |
主要差異化特點
- Full-speed USB 2.0 device on-chip (對比ATSAMD20J14B-MU)
- Capacitive touch (PTC) controller integrated (對比PIC16F684-I/SL)
- 32-bit Cortex-M0+ core vs 8-bit PIC alternatives (對比PIC16F677-I/SS)
設計說明
Solder the exposed thermal pad (pin 65/EP) of the ATSAMD20J15B-MUT to a continuous ground copper plane on the top layer. The Microchip hardware design guidelines (TB3070) recommend at least 4 thermal vias (0.3 mm drill) connecting the EP to inner-layer ground planes for proper thermal dissipation. Without proper EP soldering, the device may fail at elevated ambient temperatures due to higher junction-to-ambient thermal resistance.
Place one 100 nF 0402 ceramic decoupling capacitor as close as possible to each VDDIO pin (typically 4 instances on the 64-pin VQFN). Add a single 4.7 uF or 10 uF bulk capacitor at the VDDIN entry point. Per Microchip SAM D20 hardware guidance, VDDIN must be within 1.62V-3.63V; exceeding 3.63V will permanently damage the on-chip regulator.
Do not leave unused SERCOM pins floating if USB or external peripherals share the package footprint. Configure all unused I/O as input with internal pull-up enabled, or output low, in firmware to minimize Sleep-mode current consumption. Also, when migrating from ATSAMD20J15A (revision A) to the ATSAMD20J15B (revision B), review the latest errata document for any peripheral changes affecting your application code.
合規資訊
RoHS compliant per Microchip ATSAMD20J15 product page (Green / lead-free designation). Not AEC-Q100 qualified - automotive applications should consider ATSAMx70 or ATSAME70 automotive-grade families instead.
