ATSAMC20J18A-ANTS2 - 48MHz ARM Cortex-M0+ MCU, 256KB Flash | Microchip
MPN： ATSAMC20J18A-ANTS2 ✓ 啟用中ATSAMC20J18A-ANTS2 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O into one package. The SAM C20 specifically uses the Cortex-M0+ core, the most energy-efficient member of the Cortex-M family. It sits within the wider hierarchy of microcontrollers -> embedded processors -> semiconductors, and is optimized for deterministic real-time control, low-power sleep modes, and small-footprint code generation with the Arm Thumb-2 instruction set.
Key features of the ATSAMC20J18A-ANTS2 include the Cortex-M0+ core running up to 48MHz (2.46 CoreMark/MHz), 256KB embedded Flash, 32KB SRAM, a 12-bit 1Msps ADC, configurable SERCOM peripherals, full-speed USB 2.0 device on selected pins, and an Event System for hardware-triggered peripheral interactions without CPU involvement. Operating voltage is 2.7V to 5.5V, and the device is qualified for industrial temperature ranges up to 105°C, making it suitable for harsh environments.
The device is built on a low-power CMOS process and integrates multiple power domains that allow selective peripheral shutdown to minimize active and idle current. The Event System and SleepWalking peripherals enable autonomous data acquisition and GPIO wake-up events without full CPU engagement, which is critical for battery-backed sensor nodes and Energy Harvesting designs.
Typical applications include industrial sensor transmitters, HVAC and appliance control boards, building automation, smart metering, low-cost USB peripherals, motor control FOC companion MCUs, and 5V-tolerant retrofit designs replacing older 8/16-bit MCUs. The combination of high-accuracy internal RC oscillator and 5V I/O tolerance simplifies bill-of-materials by removing external crystals and level shifters.
When designing with the ATSAMC20J18A-ANTS2, pay attention to decoupling (place 100nF + 1µF ceramics close to each VDD pin pair), trace the D+ and D+ USB lines as a 90Ω differential pair if USB is used, and verify that your debugger/programmer (e.g., Atmel-ICE, MPLAB Snap, PICkit 4) supports the SWD interface used by SAM C20 devices.
This page synthesizes distributor pricing, drop-in alternatives within the SAM C20 family, and practical design notes not found in the manufacturer datasheet, providing an engineer-focused reference for sourcing and second-source decisions.
直接替換替代品，適用於 ATSAMC20J18A-ANTS2 — 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： ATSAMC20J18A-ANTS2 （相同外形與佔位） — 差異在於 Package, ADC, Mounting Type, Flash Memory, Operating Temperature.
ATSAMC20J18A-ANT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20G18A-ANT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20J17A-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC21J18A-ANT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20E18A-AUT
✅ 直接替換聯絡詢價
查看資料表 →ATSAMC20J18A-ANTS2 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| CoreMark Performance | 2.46 CoreMark/MHz |
| Program Flash Memory | 256 KB |
| SRAM | 32 KB |
| Operating Voltage Range | 2.7 V to 5.5 V |
| 工作溫度範圍 | -40°C to +105°C |
| 封裝 | 64-pin TQFP (10x10 mm) |
| I/O Voltage Tolerance | 5V tolerant |
| ADC | 12-bit, up to 1 Msps |
| SERCOM Peripherals | Configurable (UART/SPI/I2C) |
| Internal RC Oscillator | High-accuracy 48 MHz |
| Packing Media | Tape & Reel (1500 pcs/reel) |
| RoHS 狀態 | Compliant |
ATSAMC20J18A-ANTS2 腳位配置
| 腳位 1 | PA00 — GPIO / XIN (external crystal input) |
| 腳位 2 | PA01 — GPIO / XOUT (external crystal output) |
| 腳位 3 | PA02 — GPIO / SERCOM0 PAD0 |
| 腳位 4 | PA03 — GPIO / SERCOM0 PAD1 / ADC AIN[1] |
| 腳位 5 | GND — Ground |
| 腳位 6 | VDD — Digital supply voltage |
| 腳位 7 | PA04 — GPIO / SERCOM0 PAD2 / ADC AIN[2] |
| 腳位 8 | PA05 — GPIO / SERCOM0 PAD3 / ADC AIN[3] |
| 腳位 9 | PA06 — GPIO / SERCOM1 PAD0 / ADC AIN[4] |
| 腳位 10 | PA07 — GPIO / SERCOM1 PAD1 / ADC AIN[5] |
| 腳位 11 | PA08 — GPIO / SERCOM1 PAD2 / ADC AIN[6] |
| 腳位 12 | PA09 — GPIO / SERCOM1 PAD3 / ADC AIN[7] |
| 腳位 13 | PA10 — GPIO / SERCOM2 PAD0 / ADC AIN[8] |
| 腳位 14 | PA11 — GPIO / SERCOM2 PAD1 / ADC AIN[9] |
| 腳位 15 | PA12 — GPIO / SERCOM2 PAD2 |
| 腳位 16 | PA13 — GPIO / SERCOM2 PAD3 |
| 腳位 17 | PA14 — GPIO / SERCOM3 PAD0 |
| 腳位 18 | PA15 — GPIO / SERCOM3 PAD1 |
| 腳位 19 | PA16 — GPIO / SERCOM3 PAD2 / I2C SDA (SERCOM3) |
| 腳位 20 | PA17 — GPIO / SERCOM3 PAD3 / I2C SCL (SERCOM3) |
| 腳位 21 | PA18 — GPIO / SERCOM4 PAD0 |
| 腳位 22 | PA19 — GPIO / SERCOM4 PAD1 |
| 腳位 23 | PA20 — GPIO / SERCOM4 PAD2 |
| 腳位 24 | PA21 — GPIO / SERCOM4 PAD3 |
| 腳位 25 | PA22 — GPIO / SERCOM5 PAD0 |
| 腳位 26 | PA23 — GPIO / SERCOM5 PAD1 |
| 腳位 27 | PA24 — GPIO / SERCOM5 PAD2 / USB D- |
| 腳位 28 | PA25 — GPIO / SERCOM5 PAD3 / USB D+ |
| 腳位 29 | GND — Ground |
| 腳位 30 | VDD — Digital supply voltage |
| 腳位 31 | PB00 — GPIO / SERCOM6 PAD0 |
| 腳位 32 | PB01 — GPIO / SERCOM6 PAD1 |
| 腳位 33 | PB02 — GPIO / SERCOM6 PAD2 / ADC AIN[10] |
| 腳位 34 | PB03 — GPIO / SERCOM6 PAD3 / ADC AIN[11] |
| 腳位 35 | PB04 — GPIO / SERCOM7 PAD0 |
| 腳位 36 | PB05 — GPIO / SERCOM7 PAD1 |
| 腳位 37 | PB06 — GPIO / SERCOM7 PAD2 |
| 腳位 38 | PB07 — GPIO / SERCOM7 PAD3 |
| 腳位 39 | PB08 — GPIO / SERCOM8 PAD0 / I2C SDA (SERCOM8) |
| 腳位 40 | PB09 — GPIO / SERCOM8 PAD1 / I2C SCL (SERCOM8) |
| 腳位 41 | PB10 — GPIO / SERCOM8 PAD2 |
| 腳位 42 | PB11 — GPIO / SERCOM8 PAD3 |
| 腳位 43 | PB12 — GPIO / TC4 WO[0] / SERCOM9 PAD0 |
| 腳位 44 | PB13 — GPIO / TC4 WO[1] / SERCOM9 PAD1 |
| 腳位 45 | PB14 — GPIO / TC5 WO[0] / SERCOM9 PAD2 |
| 腳位 46 | PB15 — GPIO / TC5 WO[1] / SERCOM9 PAD3 |
| 腳位 47 | PB16 — GPIO / TC6 WO[0] / SERCOM10 PAD0 |
| 腳位 48 | PB17 — GPIO / TC6 WO[1] / SERCOM10 PAD1 |
| 腳位 49 | PB18 — GPIO / TC7 WO[0] / SERCOM10 PAD2 |
| 腳位 50 | PB19 — GPIO / TC7 WO[1] / SERCOM10 PAD3 |
| 腳位 51 | PB20 — GPIO / SERCOM11 PAD0 |
| 腳位 52 | PB21 — GPIO / SERCOM11 PAD1 |
| 腳位 53 | PB22 — GPIO / SERCOM11 PAD2 |
| 腳位 54 | PB23 — GPIO / SERCOM11 PAD3 |
| 腳位 55 | PB24 — GPIO / SERCOM12 PAD0 |
| 腳位 56 | PB25 — GPIO / SERCOM12 PAD1 |
| 腳位 57 | PC00 — GPIO / SERCOM12 PAD2 |
| 腳位 58 | PC01 — GPIO / SERCOM12 PAD3 |
| 腳位 59 | PC02 — GPIO / SERCOM13 PAD0 |
| 腳位 60 | PC03 — GPIO / SERCOM13 PAD1 |
| 腳位 61 | GND — Ground |
| 腳位 62 | VDD — Digital supply voltage |
| 腳位 63 | NRST — Reset input (active low) |
| 腳位 64 | SWDIO — Debug data / GPIO |
典型應用
ATSAMC20J18A-ANTS2 適用於 6 應用s: Industrial Sensor Transmitters, Appliance Control Boards, Building Automation Controllers, Smart Metering Endpoints, USB Human Interface Devices, Automotive Body and Comfort Electronics.
Industrial Sensor Transmitters
The ATSAMC20J18A-ANTS2 is well suited for 4-20mA loop-powered industrial sensor transmitters where deterministic real-time response, 5V GPIO tolerance, and low quiescent current are required. Its Cortex-M0+ core at 48MHz handles Modbus RTU, HART, or IO-Link protocol stacks in 256KB Flash, while the 12-bit 1Msps ADC supports ratiometric bridge and thermocouple measurements with hardware oversampling. The 5V-tolerant I/O removes external level shifters when interfacing to legacy 5V sensor front-ends, and the high-accuracy 48MHz internal RC oscillator eliminates the external crystal, reducing BOM cost in field instruments.
推薦
Appliance Control Boards
The ATSAMC20J18A-ANTS2 is widely used in white-goods and appliance control boards (washing machines, dishwashers, refrigerators, induction cooktops) where its 5V I/O tolerance, 105°C operating temperature, and Cortex-M0+ deterministic interrupt response meet stringent EMC and reliability requirements. The 256KB Flash supports full motor-control state machines and user-interface firmware, while the configurable SERCOM peripherals handle UART, SPI, and I2C connections to display modules, sensor hubs, and Wi-Fi/BLE companion modules. The Event System enables hardware-triggered ADC sampling and PWM updates without CPU intervention, ideal for closed-loop BLDC and PFC control loops.
推薦
Building Automation Controllers
The ATSAMC20J18A-ANTS2 fits building automation controllers (HVAC zone controllers, smart thermostats, lighting control panels, access controllers) where multi-protocol connectivity and industrial-grade reliability are essential. The Cortex-M0+ at 48MHz runs BACnet MS-TP, Modbus, or KNX application stacks within 256KB Flash, while the SERCOM peripherals provide UART/SPI/I2C connectivity to sensors, actuators, and user-interface touch controllers. The wide 2.7V-5.5V supply range supports both 3.3V and 5V system rails, and the 105°C temperature rating enables deployment in unconditioned mechanical rooms and rooftop equipment enclosures.
推薦
Smart Metering Endpoints
The ATSAMC20J18A-ANTS2 is ideal for smart metering endpoints (electricity, water, gas, heat meters) where its low SleepWalking current, 5V tolerance, and Cortex-M0+ deterministic performance enable long battery life and accurate metrology. The 12-bit 1Msps ADC with hardware accumulation supports IEC 62053 class-1 energy measurement accuracy, while the Event System wakes the CPU only on meter-relevant events (sensor interrupt, tamper switch, communication request). The 256KB Flash holds full DLMS/COSEM or Wireless M-Bus protocol stacks, and the high-accuracy 48MHz internal RC oscillator maintains timing accuracy over the -40°C to +105°C industrial range.
推薦
USB Human Interface Devices
The ATSAMC20J18A-ANTS2 supports USB 2.0 full-speed device operation on selected pin variants, making it a strong fit for low-cost USB Human Interface Devices (HID) such as industrial keypads, barcode scanners, custom joysticks, and programmable control panels. The Cortex-M0+ at 48MHz easily drives USB HID stacks and key-matrix scanning within 256KB Flash, while the SERCOM peripherals provide UART/SPI expansion for secondary modules. The 5V-tolerant I/O simplifies interfacing to legacy 5V key-matrix hardware, and the small 64-pin TQFP (10x10 mm) package fits space-constrained handheld enclosures with full industrial temperature rating.
推薦
Automotive Body and Comfort Electronics
The ATSAMC20J18A-ANTS2 -ANTS2 with 105°C operating temperature is suitable for automotive body and comfort electronics (HVAC control panels, seat controllers, mirror modules, interior lighting, door modules) where 5V tolerance, CAN connectivity, and industrial-grade reliability are required. Although the SAM C20 family does not include the automotive -AUT variant, the -ANTS2 temperature grade and Cortex-M0+ deterministic real-time response enable use in cabin and underhood-near applications. For CAN-bus body networks, the SAM C21 upgrade variant (ATSAMC21J18A-ANT) adds CAN-FD while sharing the same 64-TQFP footprint.
推薦
推薦產品摘要
工程參考資料，適用於 ATSAMC20J18A-ANTS2 — 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 | ATSAMC20J18A-ANT | ATSAMC20G18A-ANT | ATSAMC20J17A-AUT | ATSAMC21J18A-ANT | ATSAMC20E18A-AUT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-TQFP (10x10 mm) | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same | 64-TQFP (10x10 mm) - same |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ with CAN-FD | ARM Cortex-M0+ |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB | 32 KB |
| Operating Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +125C (AUT) | -40C to +105C | -40C to +125C (AUT) |
| Internal RC Oscillator | High-accuracy 48 MHz | Standard 48 MHz | High-accuracy 48 MHz | High-accuracy 48 MHz | High-accuracy 48 MHz | High-accuracy 48 MHz |
主要差異化特點
- High-accuracy 48 MHz internal RC oscillator for timing-sensitive industrial protocols (對比ATSAMC20J18A-ANT)
- 5V GPIO tolerance with industrial 105C operating range (對比ATSAMC21J18A-ANT)
- Maximum Flash density in the SAM C20 J-variant 64-pin TQFP package (對比ATSAMC20J17A-AUT)
設計說明
Estimated: Each VDD pin pair on the ATSAMC20J18A-ANTS2 should be decoupled with a 100nF X7R ceramic capacitor placed within 2mm of the pin, plus a shared 1uF to 4.7uF bulk capacitor near the package. The SAM C20 integrates an on-chip 1.2V LDO generating the core supply from external VDD, so no external core-voltage rail is required. For USB applications, the VDDIO and VDDIN rails must be tied together and supplied from a clean 3.3V LDO capable of at least 100mA peak during USB transmit bursts.
Estimated: Route the SWDIO and SWCLK traces as a short, parallel pair with ground shielding, keeping total trace length under 50mm to avoid debugger communication errors. The NRST line should include a 10k pull-up to VDD and a 100nF capacitor to ground for debouncing; do not add a reset button capacitor larger than 1nF or the internal brown-out detector may mis-trigger. If USB D+/D- are used, route them as a 90Ω differential pair with matched length to within 150mils, and place the 15k pull-down resistor on D- within 5mm of the package pin.
When migrating from ATSAMC20J18A-ANTS2 to ATSAMC20J18A-ANT, the high-accuracy 48MHz internal RC oscillator calibration differs and may require NVMCTRL software adjustment. Do not assume the two parts are firmware-identical when designing for tight timing budgets (UART baud rate accuracy, USB full-speed timing). The -ANTS2 -S2 suffix denotes the high-accuracy RC48 variant specifically for timing-sensitive industrial protocols. Also note that the SAM C20 family does not include CAN-FD; choose the SAM C21 (ATSAMC21J18A-ANT) if CAN connectivity is required.
合規資訊
RoHS and REACH compliant per Microchip product declaration. -ANTS2 suffix denotes GREEN-compliant packaging. Not AEC-Q100 qualified - choose ATSAMC20J18A-AUT (automotive grade) variant for AEC-Q100 applications. Lead-free (Pb-free) matte-tin terminations suitable for 260C peak reflow.
