ATSAML21J16B-AUT - 48MHz Cortex-M0+ MCU 64KB Flash | Microchip
N.º da peça: ATSAML21J16B-AUT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.1 | $7,10 |
| 10 | $6.4 | $64,00 |
| 100 | $5.5 | $550,00 |
| 500 | $4.85 | $2.425,00 |
| 1.000 | $4.25 | $4.250,00 |
ATSAML21J16B-AUT Visão geral
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.
Alternativas drop-in para ATSAML21J16B-AUT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ATSAML21J16B-AUT (mesmo formato e footprint) — diferindo em Package, ADC, SRAM, DAC, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ATSAML21J17B-AUT
✅ Drop-In✓ Em estoque
$2.98 / unidade
Ver ficha técnica →ATSAML21J18B-AUT
✅ Drop-In✓ Em estoque
$4.55 / unidade
Ver ficha técnica →ATSAML21J16B-MUT
✅ Drop-In✓ Em estoque
$2.18 / unidade
Ver ficha técnica →ATSAML21J16B-ANT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ATSAML21E16B-MUT
✅ Drop-In✓ Em estoque
$2.3 / unidade
Ver ficha técnica →ATSAML21G17B-ANT
✅ Drop-In✓ Em estoque
$2.71 / unidade
Ver ficha técnica →ATSAML21J16B-AUT Classificações máximas e características elétricas
| Core Architecture | ARM Cortex-M0+ 32-bit |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 8 KB |
| Encapsulamento | 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) |
| Faixa de temperatura de operação | -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 |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do ATSAML21J16B-AUT
| Pino 1 | PA00 — GPIO / XIN32 / SERCOM1[0] |
| Pino 2 | PA01 — GPIO / XOUT32 / SERCOM1[1] |
| Pino 3 | PA02 — GPIO / AIN0 / SERCOM0[0] |
| Pino 4 | PA03 — GPIO / AIN1 / SERCOM0[1] |
| Pino 5 | VDDIO — I/O supply voltage |
| Pino 6 | VSS — Ground |
| Pino 7 | PA04 — GPIO / AIN2 / SERCOM0[2] |
| Pino 8 | PA05 — GPIO / AIN3 / SERCOM0[3] |
| Pino 9 | PA06 — GPIO / AIN4 / SERCOM2[0] |
| Pino 10 | PA07 — GPIO / AIN5 / SERCOM2[1] |
| Pino 11 | PA08 — GPIO / AIN6 / SERCOM2[2] |
| Pino 12 | PA09 — GPIO / AIN7 / SERCOM2[3] |
| Pino 13 | PA10 — GPIO / AIN8 / SERCOM0[2] |
| Pino 14 | PA11 — GPIO / AIN9 / SERCOM0[3] |
| Pino 15 | VDD — Core supply voltage |
| Pino 16 | VSS — Ground |
| Pino 17 | PB10 — GPIO / SERCOM4[2] |
| Pino 18 | PB11 — GPIO / SERCOM4[3] |
| Pino 19 | PB12 — GPIO / SERCOM4[0] |
| Pino 20 | PB13 — GPIO / SERCOM4[1] |
| Pino 21 | PB14 — GPIO / SERCOM5[2] |
| Pino 22 | PB15 — GPIO / SERCOM5[3] |
| Pino 23 | PA12 — GPIO / SERCOM4[0] |
| Pino 24 | PA13 — GPIO / SERCOM4[1] |
| Pino 25 | PA14 — GPIO / SERCOM2[0] |
| Pino 26 | PA15 — GPIO / SERCOM2[1] |
| Pino 27 | PA16 — GPIO / SERCOM1[0] |
| Pino 28 | PA17 — GPIO / SERCOM1[1] |
| Pino 29 | PA18 — GPIO / SERCOM1[2] |
| Pino 30 | PA19 — GPIO / SERCOM1[3] |
| Pino 31 | PA20 — GPIO / SERCOM5[2] |
| Pino 32 | PA21 — GPIO / SERCOM5[3] |
| Pino 33 | PA22 — GPIO / SERCOM3[0] |
| Pino 34 | PA23 — GPIO / SERCOM3[1] |
| Pino 35 | PA24 — GPIO / SERCOM3[2] / USB_DM |
| Pino 36 | PA25 — GPIO / SERCOM3[3] / USB_DP |
| Pino 37 | PB16 — GPIO / SERCOM5[0] |
| Pino 38 | PB17 — GPIO / SERCOM5[1] |
| Pino 39 | PA27 — GPIO / SERCOM3[3] |
| Pino 40 | RESET — Reset input, active low |
| Pino 41 | VDD — Core supply voltage |
| Pino 42 | VSS — Ground |
| Pino 43 | PA28 — GPIO / SERCOM5[0] |
| Pino 44 | PA29 — GPIO / SERCOM5[1] |
| Pino 45 | PA30 — GPIO / SERCOM1[2] |
| Pino 46 | PA31 — GPIO / SERCOM1[3] |
| Pino 47 | PB22 — GPIO / SERCOM5[2] |
| Pino 48 | PB23 — GPIO / SERCOM5[3] |
| Pino 49 | PB30 — GPIO / SERCOM5[0] |
| Pino 50 | PB31 — GPIO / SERCOM5[1] |
| Pino 51 | PB00 — GPIO / AIN8 / SERCOM5[2] |
| Pino 52 | PB01 — GPIO / AIN9 / SERCOM5[3] |
| Pino 53 | PB02 — GPIO / AIN10 / SERCOM5[0] |
| Pino 54 | PB03 — GPIO / AIN11 / SERCOM5[1] |
| Pino 55 | VDDIO — I/O supply voltage |
| Pino 56 | VSS — Ground |
| Pino 57 | PB04 — GPIO / SERCOM3[0] |
| Pino 58 | PB05 — GPIO / SERCOM3[1] |
| Pino 59 | PB06 — GPIO / SERCOM3[2] |
| Pino 60 | PB07 — GPIO / SERCOM3[3] |
| Pino 61 | PB08 — GPIO / SERCOM4[0] |
| Pino 62 | PB09 — GPIO / SERCOM4[1] |
| Pino 63 | SWDIO — Debug data |
| Pino 64 | SWCLK — Debug clock |
Aplicações típicas
ATSAML21J16B-AUT é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ATSAML21J16B-AUT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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) |
Principais diferenciais
- Ultra-low-power Sleep with on-chip DC-DC converter (vs ATSAMD21J16B-AFT)
- Integrated segmented LCD controller (vs ATSAML21E16B-MUT)
- Drop-in memory upgrade path within same package (vs ATSAML21J16B-MUT)
Notas de projeto
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.
Informações de conformidade
RoHS and REACH compliance per Microchip product page. Industrial grade only; not AEC-Q100 automotive qualified - choose ATSAML21E16B-AUT automotive variants for vehicle applications.
