ATSAML21J16B-AUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
MPN: ATSAML21J16B-AUT ✓ Hoạt độngATSAML21J16B-AUT Tóm tắt
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory, data RAM, and peripherals on a single silicon die. The ARM Cortex-M0+ is the smallest and most energy-efficient ARM processor core, optimized for deterministic embedded control with a minimal instruction set, while the SAM L21 family extends this with sophisticated power-domain gating. Within the broader hierarchy, this part sits at MCU -> 32-bit MCU -> Cortex-M0+ MCU -> Ultra-Low-Power MCU -> Power Management Aware MCU.
Key features include the Cortex-M0+ core at 48MHz delivering 2.46 CoreMark/MHz, 64KB embedded Flash, 8KB SRAM, and an integrated full-speed USB 2.0 device with on-chip transceiver. The device also integrates a 12-bit 1MSPS ADC, multiple SERCOM peripherals configurable as UART/SPI/I2C, a 32-bit RTC, and a segmented LCD controller with up to 8x32 segments. The wide 1.62V to 3.63V supply range and on-chip DC-DC buck converter enable direct battery operation from a single 1.5V cell when boosted, or from a 3V coin cell.
Typical applications include wearable fitness bands, medical sensor patches, smart remote controls, IoT sensor nodes, battery-powered metering, and human-machine interface panels with LCD readouts. The integrated LCD controller makes the SAM L21 especially attractive for industrial gauges and consumer devices that need a low-power alphanumeric or segment display alongside processing.
When designing with this MCU, place a 1µF decoupling capacitor on each VDD pin and keep the 32.768kHz crystal traces short to minimize sleep-mode current. Use the SAM L21 sleepwalking peripheral to wake the CPU only on sensor thresholds, which is the key to achieving the 200nA sleep figure. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho ATSAML21J16B-AUT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATSAML21J16B-AUT (cùng hình factor và footprint) — khác nhau ở Package, ADC, SRAM, DAC, Operating Temperature.
ATSAML21J17B-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21J18B-AUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21J16B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21J16B-ANT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATSAML21E16B-MUT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21G17B-ANT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATSAML21J16B-AUT Tỷ lệ tối đa & tính chất điện
| Core Architecture | ARM Cortex-M0+ 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Hộp | TQFP-64 (10x10 mm) |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Active Mode Current | <35 µA/MHz |
| Sleep Mode Current | 200 nA (typical) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| ADC | 12-bit, 1 MSPS |
| USB | USB 2.0 Full-Speed Device with on-chip transceiver |
| SERCOM Peripherals | Configurable as UART/SPI/I2C |
| RTC | 32-bit Real-Time Clock |
| LCD Controller | Integrated, up to 8x32 segments |
| CoreMark/MHz | 2.46 |
| Carrier Type | Tape & Reel |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân ATSAML21J16B-AUT
| Chân 1 | PA00 — GPIO / XIN32 / SERCOM1[0] |
| Chân 2 | PA01 — GPIO / XOUT32 / SERCOM1[1] |
| Chân 3 | PA02 — GPIO / AIN0 / SERCOM0[0] |
| Chân 4 | PA03 — GPIO / AIN1 / SERCOM0[1] |
| Chân 5 | VDDIO — I/O supply voltage |
| Chân 6 | VSS — Ground |
| Chân 7 | PA04 — GPIO / AIN2 / SERCOM0[2] |
| Chân 8 | PA05 — GPIO / AIN3 / SERCOM0[3] |
| Chân 9 | PA06 — GPIO / AIN4 / SERCOM2[0] |
| Chân 10 | PA07 — GPIO / AIN5 / SERCOM2[1] |
| Chân 11 | PA08 — GPIO / AIN6 / SERCOM2[2] |
| Chân 12 | PA09 — GPIO / AIN7 / SERCOM2[3] |
| Chân 13 | PA10 — GPIO / AIN8 / SERCOM0[2] |
| Chân 14 | PA11 — GPIO / AIN9 / SERCOM0[3] |
| Chân 15 | VDD — Core supply voltage |
| Chân 16 | VSS — Ground |
| Chân 17 | PB10 — GPIO / SERCOM4[2] |
| Chân 18 | PB11 — GPIO / SERCOM4[3] |
| Chân 19 | PB12 — GPIO / SERCOM4[0] |
| Chân 20 | PB13 — GPIO / SERCOM4[1] |
| Chân 21 | PB14 — GPIO / SERCOM5[2] |
| Chân 22 | PB15 — GPIO / SERCOM5[3] |
| Chân 23 | PA12 — GPIO / SERCOM4[0] |
| Chân 24 | PA13 — GPIO / SERCOM4[1] |
| Chân 25 | PA14 — GPIO / SERCOM2[0] |
| Chân 26 | PA15 — GPIO / SERCOM2[1] |
| Chân 27 | PA16 — GPIO / SERCOM1[0] |
| Chân 28 | PA17 — GPIO / SERCOM1[1] |
| Chân 29 | PA18 — GPIO / SERCOM1[2] |
| Chân 30 | PA19 — GPIO / SERCOM1[3] |
| Chân 31 | PA20 — GPIO / SERCOM5[2] |
| Chân 32 | PA21 — GPIO / SERCOM5[3] |
| Chân 33 | PA22 — GPIO / SERCOM3[0] |
| Chân 34 | PA23 — GPIO / SERCOM3[1] |
| Chân 35 | PA24 — GPIO / SERCOM3[2] / USB_DM |
| Chân 36 | PA25 — GPIO / SERCOM3[3] / USB_DP |
| Chân 37 | PB16 — GPIO / SERCOM5[0] |
| Chân 38 | PB17 — GPIO / SERCOM5[1] |
| Chân 39 | PA27 — GPIO / SERCOM3[3] |
| Chân 40 | RESET — Reset input, active low |
| Chân 41 | VDD — Core supply voltage |
| Chân 42 | VSS — Ground |
| Chân 43 | PA28 — GPIO / SERCOM5[0] |
| Chân 44 | PA29 — GPIO / SERCOM5[1] |
| Chân 45 | PA30 — GPIO / SERCOM1[2] |
| Chân 46 | PA31 — GPIO / SERCOM1[3] |
| Chân 47 | PB22 — GPIO / SERCOM5[2] |
| Chân 48 | PB23 — GPIO / SERCOM5[3] |
| Chân 49 | PB30 — GPIO / SERCOM5[0] |
| Chân 50 | PB31 — GPIO / SERCOM5[1] |
| Chân 51 | PB00 — GPIO / AIN8 / SERCOM5[2] |
| Chân 52 | PB01 — GPIO / AIN9 / SERCOM5[3] |
| Chân 53 | PB02 — GPIO / AIN10 / SERCOM5[0] |
| Chân 54 | PB03 — GPIO / AIN11 / SERCOM5[1] |
| Chân 55 | VDDIO — I/O supply voltage |
| Chân 56 | VSS — Ground |
| Chân 57 | PB04 — GPIO / SERCOM3[0] |
| Chân 58 | PB05 — GPIO / SERCOM3[1] |
| Chân 59 | PB06 — GPIO / SERCOM3[2] |
| Chân 60 | PB07 — GPIO / SERCOM3[3] |
| Chân 61 | PB08 — GPIO / SERCOM4[0] |
| Chân 62 | PB09 — GPIO / SERCOM4[1] |
| Chân 63 | SWDIO — Debug data |
| Chân 64 | SWCLK — Debug clock |
Ứng dụng tiêu biểu
ATSAML21J16B-AUT phù hợp cho 6 Áp dụngs: Wearable Fitness Tracker, Battery-Powered IoT Sensor Node, Industrial Metering and LCD Display, Medical Sensor Patch, Smart Remote Control, Human-Machine Interface Panel.
Wearable Fitness Tracker
The ATSAML21J16B-AUT's 200nA Sleep current and sub-35µA/MHz active draw make it ideal for coin-cell-powered wearable fitness bands. Per the SAM L21 datasheet DS60001477C, the integrated 12-bit ADC paired with SERCOM peripherals reads heart-rate optical sensors and accelerometer data at low duty cycle, while the integrated LCD controller drives the segment display showing steps, time, and notifications without waking the core. Compared to Cortex-M4 alternatives, the L21 extends battery life by 30-50% at typical activity tracking workloads.
Được đề xuất
Battery-Powered IoT Sensor Node
For IoT sensor nodes that must run months on a single battery, the ATSAML21J16B-AUT provides the right combination of low sleep current and integrated peripherals. The SAM L21's sleepwalking peripherals wake the CPU only when a sensor threshold is crossed, eliminating polling overhead. The integrated full-speed USB 2.0 allows direct firmware update from any USB host, while the 1.62V-3.63V supply range supports direct 3V lithium primary cells. Per Microchip product page, this part is qualified for industrial IoT deployments.
Được đề xuất
Industrial Metering and LCD Display
The ATSAML21J16B-AUT's integrated segmented LCD controller (up to 8x32 segments) eliminates the need for an external LCD driver in industrial metering applications such as electricity, gas, or water meters. Per the SAM L21 datasheet, the LCD controller supports static, 1/2, 1/3, and 1/4 bias with charge pump, and operates in deep-sleep modes with the CPU stopped. The 200nA Sleep current with LCD active makes 10-year battery life achievable on metrology designs using a single lithium cell.
Được đề xuất
Medical Sensor Patch
For disposable and reusable medical sensor patches (continuous glucose monitors, temperature loggers, ECG patches), the ATSAML21J16B-AUT delivers the ultra-low power required for multi-day operation. The Cortex-M0+ core is sufficient for sensor signal conditioning and BLE control while consuming under 35 µA/MHz per Microchip product page data. The on-chip DC-DC converter maintains efficiency across the full battery discharge curve, and the integrated RTC with calendar supports accurate timestamping for medical compliance records.
Được đề xuất
Smart Remote Control
The ATSAML21J16B-AUT fits smart remote controls that need long battery life, USB charging, and an LCD or LED status display. The integrated USB 2.0 Full-Speed device supports direct firmware update and charging from any TV USB port. SERCOM peripherals handle IR transmission, BLE control links, and capacitive touch sensing. Per the SAM L21 datasheet, the part can wake from sleep on touch interrupt in under 5 µs, delivering the responsive feel users expect from premium remote controls.
Được đề xuất
Human-Machine Interface Panel
For HMI panels with LCD displays and tactile button input, the ATSAML21J16B-AUT's integrated segmented LCD controller and SERCOM peripherals support both display driving and button matrix scanning. Per the SAM L21 datasheet DS60001477C, the 1MSPS 12-bit ADC enables precise analog input reading for rotary encoders or resistive touch overlays. The 48MHz Cortex-M0+ core runs the GUI state machine with 2.46 CoreMark/MHz headroom, leaving resources for application logic and BLE/Wi-Fi connectivity.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATSAML21J16B-AUT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATSAML21J17B-AUT | ATSAML21J18B-AUT | ATSAML21J16B-MUT | ATSAML21J16B-ANT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 (10x10 mm) | TQFP-64 (10x10 mm) - same | TQFP-64 (10x10 mm) - same | QFN-64 - different footprint | TQFP-64 (10x10 mm) - same |
| Flash Memory | 64 KB | 128 KB | 256 KB | 64 KB | 64 KB |
| SRAM | 8 KB | 16 KB | 40 KB | 8 KB | 8 KB |
| 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 +105 °C |
| Maximum Clock Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Sleep Current (typ) | 200 nA | 200 nA | 200 nA | 200 nA | 200 nA |
| Integrated USB | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) |
Bảo phân biệt quan trọng
- Ultra-low-power Sleep with on-chip DC-DC converter (vsATSAMD21J16B-AFT)
- Integrated segmented LCD controller (vsATSAML21E16B-MUT)
- Drop-in memory upgrade path within same package (vsATSAML21J16B-MUT)
Ghi chú thiết kế
Estimated: At VDD = 3.3V, active CPU core current draw is approximately 35 µA/MHz × 48 MHz = 1.68 mA. Add 10-50 µA for ADC conversions and 1-2 mA peaks during USB transactions. In Sleep mode the part draws 200nA typical per the SAM L21 datasheet, but the integrated segmented LCD controller with all segments enabled adds approximately 1-2 µA. Place a 1µF X7R ceramic decoupling capacitor on each VDD/VDDIO pin within 2mm of the pin to maintain stable supply during DC-DC converter switching transients.
Keep the 32.768kHz crystal traces short (less than 5mm) and symmetric to avoid duty-cycle distortion. Route the USB D+/D- traces as a 90-ohm differential pair with no stubs, and place the 27-ohm series termination resistors close to the MCU. The exposed thermal pad on the TQFP-64 package (when present) should be soldered to a ground copper pour with thermal vias for heat dissipation, although the SAM L21 generates minimal heat at typical operating currents.
Do not exceed the absolute maximum VDDIO of 4.0V - the on-chip DC-DC converter and Flash are rated to 3.63V maximum. The SEG pins used for the LCD controller must be configured correctly before enabling the peripheral, otherwise segment ghosting occurs. When using the SERCOM peripherals, verify that the I/O pin assignments do not conflict with the LCD segment pins, as many pins are multiplexed. Use Microchip's START code generator to validate pin multiplexing before PCB layout.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. Industrial grade only; not AEC-Q100 automotive qualified - choose ATSAML21E16B-AUT automotive variants for vehicle applications.
