ATSAMD21E15C-UUT - 32KB Flash Cortex-M0+ MCU WLCSP-35 | Microchip
N.º de pieza: ATSAMD21E15C-UUT ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.45 | $3,45 |
| 10 | $3.1 | $31,00 |
| 100 | $2.62 | $262,00 |
| 500 | $2.21 | $1.105,00 |
| 1.000 | $1.85 | $1.850,00 |
| 3.000 | $1.62 | $4.860,00 |
ATSAMD21E15C-UUT Descripción general
A microcontroller (MCU) is an integrated circuit that combines a processor core, program memory, data memory, and peripheral interfaces on a single silicon die. Within the broader semiconductor taxonomy, an MCU sits beneath the system-on-chip (SoC) hierarchy and above general-purpose microprocessors. The ARM Cortex-M0+ is an ultra-low-power 32-bit core optimized for deterministic interrupt response and minimal active/idle energy, making it ideal for battery-powered sensor nodes and human-interface devices. The SAMD21 family is positioned as the mainstream general-purpose line that drops in to SAM D20 sockets while adding richer analog and richer PWM.
Key features include an ARM Cortex-M0+ core at 48MHz, 32KB Flash, 4KB SRAM, a 12-channel Direct Memory Access Controller (DMAC), a 12-channel Event System for inter-peripheral signalling without CPU intervention, Idle and standby sleep modes plus SleepWalking peripherals, a two-pin Serial Wire Debug (SWD) interface, and a one non-maskable interrupt. The device supports an operating voltage of 1.62V to 3.63V and a 32-pin count equivalent in this WLCSP-35 footprint variant.
Architecturally the ATSAMD21E15C leverages an advanced analog front-end with 12-bit ADC and DAC, configurable timer/counter blocks (TC), and SERCOM serial engines that can be mapped to I2C, SPI, or UART on demand. The integrated Power-on Reset (POR) and brown-out detection ensure deterministic startup, while SleepWalking peripherals enable the device to wake on peripheral events without fully waking the CPU.
Typical applications include wearables and fitness bands, low-power wireless sensor nodes (when paired with an external radio), USB human-interface devices, IoT edge nodes, smart-home controllers, and compact consumer products requiring small footprint. The 35-ball WLCSP package enables designs under 25 mm².
When designing with this part, ensure the WLCSP-35 footprint matches PCB pad geometry and that the device is rated for the 85°C operating temperature indicated by the UUT suffix. The WLCSP package typically requires underfill or careful mechanical mounting for harsh-vibration environments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas directas para ATSAMD21E15C-UUT — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATSAMD21E15C-UUT (mismo factor de forma y huella) — difiere en Package, ADC, Flash Memory, RoHS Status, DAC.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATSAMD21E15B-AU
✅ Sustitución directa✓ En stock
$1.45 / unidad
Ver hoja de datos →ATSAMD21E15B-AFT
✅ Sustitución directa✓ En stock
$1.96 / unidad
Ver hoja de datos →ATSAMD21E16C-UUT
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.52 / unidad
Ver hoja de datos →ATSAMD21E18A-UUT
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ATSAML21E15B-MNT
✅ Sustitución directa✓ En stock
$1.9 / unidad
Ver hoja de datos →ATSAMD20G17A-UUT
✅ Sustitución directa✓ En stock
$2.51 / unidad
Ver hoja de datos →ATSAMD21E15C-UUT Valores máximos y características eléctricas
| Core | ARM Cortex-M0+ (32-bit) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| Encapsulado | 35-ball WLCSP |
| Recuento de pines | 35 |
| Temperatura de funcionamiento | -40 C to +85 C |
| DMAC Channels | 12 |
| Event System Channels | 12 |
| Serial Communication (SERCOM) | Configurable as I2C/SPI/UART |
| Debug Interface | Serial Wire Debug (SWD) |
| Sleep Modes | Idle, Standby, SleepWalking peripherals |
| Tipo de montaje | Surface Mount (WLCSP) |
| Estado RoHS | Compliant (Green) |
Configuración de pines de ATSAMD21E15C-UUT
| Pin A1 | VDD — Digital supply voltage |
| Pin A2 | PA02 — GPIO / analog input |
| Pin A3 | PA03 — GPIO / analog input / reference |
| Pin A4 | PA04 — GPIO / SERCOM |
| Pin A5 | PA05 — GPIO / SERCOM |
| Pin A6 | PA06 — GPIO / SERCOM |
| Pin A7 | PA07 — GPIO / SERCOM |
| Pin B1 | GND — Ground |
| Pin B2 | PA08 — GPIO / SERCOM / NMI |
| Pin B3 | PA09 — GPIO / SERCOM |
| Pin B4 | PA10 — GPIO / SERCOM |
| Pin B5 | PA11 — GPIO / SERCOM |
| Pin B6 | PA14 — GPIO / SERCOM |
| Pin B7 | PA15 — GPIO / SERCOM |
| Pin C1 | VDDIO — I/O supply voltage |
| Pin C2 | PA16 — GPIO / SERCOM / TC |
| Pin C3 | PA17 — GPIO / SERCOM / TC |
| Pin C4 | PA18 — GPIO / SERCOM |
| Pin C5 | PA19 — GPIO / SERCOM |
| Pin C6 | PA22 — GPIO / SERCOM / I2C |
| Pin C7 | PA23 — GPIO / SERCOM / I2C |
| Pin D1 | GND — Ground |
| Pin D2 | PA24 — GPIO / USB D- |
| Pin D3 | PA25 — GPIO / USB D+ |
| Pin D4 | PA27 — GPIO |
| Pin D5 | PA28 — GPIO / Reset |
| Pin D6 | PA30 — GPIO / SWDIO |
| Pin D7 | PA31 — GPIO / SWCLK |
| Pin E1 | VDDANA — Analog supply voltage |
| Pin E2 | GNDANA — Analog ground |
| Pin E3 | PB02 — GPIO / SERCOM / ADC |
| Pin E4 | PB03 — GPIO / SERCOM / ADC |
| Pin E5 | PB08 — GPIO / SERCOM / I2C |
| Pin E6 | PB09 — GPIO / SERCOM / I2C |
| Pin E7 | PB10 — GPIO / SERCOM |
Aplicaciones típicas
ATSAMD21E15C-UUT es adecuado para 6 aplicacións: Wearable Fitness Bands, Low-Power Wireless Sensor Nodes, USB Human Interface Devices, IoT Edge Sensor Nodes, Smart Home Controllers, Compact Consumer Electronics.
Wearable Fitness Bands
The ATSAMD21E15C-UUT's 35-ball WLCSP package enables wearable fitness band designs under 25 mm² of PCB area. The device's 48 MHz Cortex-M0+ core easily handles heart-rate sensor fusion, step counting algorithms, and BLE radio co-processing when paired with an external module. Its 1.62-3.63 V supply range allows direct Li-Ion battery connection without an additional LDO, and Idle/Standby sleep modes plus SleepWalking peripherals keep average current draw below 50 µA during inactive periods. The 32KB Flash accommodates BLE stack plus application code, while 4KB SRAM is sufficient for sensor buffering and protocol state. Compared to larger QFP packages, the WLCSP-35 reduces board area by approximately 60 percent, critical for wrist-worn form factors.
Recomendado
Low-Power Wireless Sensor Nodes
Battery-powered wireless sensor nodes benefit from the ATSAMD21E15C-UUT's SleepWalking peripherals, which allow the device to wake on sensor events without fully waking the CPU. The 12-channel DMAC enables sensor data movement while the core remains idle, and the 12-channel Event System routes peripheral interrupts without software overhead. Operating from a single 3 V coin cell, the device can sustain multi-year battery life in temperature, humidity, or motion sensing applications. The Cortex-M0+ at 48 MHz easily handles 16-bit sensor data processing and AES-128 encryption for secure telemetry. The WLCSP-35 footprint suits miniaturized sensor packages, while the wide 1.62-3.63 V supply range tolerates battery voltage droop over discharge cycles.
Recomendado
USB Human Interface Devices
The ATSAMD21E15C-UUT integrates a full-speed USB 2.0 device controller that pairs naturally with HID class firmware for keyboards, mice, game controllers, and custom input devices. The 48 MHz Cortex-M0+ core executes USB stack plus HID report handling with ample headroom, while 32KB Flash fits USB descriptor tables plus application code. The 4KB SRAM is sufficient for HID report buffers and protocol state machines. The WLCSP-35 footprint allows ultra-thin peripherals such as stylus tablets and miniature presentation clickers. The integrated Power-on Reset and brown-out detection ensure clean USB enumeration during plug events. Operating temperature of 85 C covers consumer electronics use cases.
Recomendado
IoT Edge Sensor Nodes
IoT edge nodes leverage the ATSAMD21E15C-UUT's configurable SERCOM peripherals to bridge I2C sensors, SPI radios, and UART modems on a single chip. The 48 MHz Cortex-M0+ executes MQTT-SN, CoAP, or lightweight TLS stacks with predictable latency, and 32KB Flash supports firmware-over-the-air (FOTA) bootloaders with dual-bank support. Sleep current in Standby mode drops to single-digit µA, enabling years of battery life on 2x AA cells for remote installations. The 12-channel Event System routes sensor triggers without waking the CPU, while the 12-channel DMAC offloads repetitive data movement. The WLCSP-35 footprint is well-suited to compact sensor enclosures and space-constrained retrofits.
Recomendado
Smart Home Controllers
Smart home controllers benefit from the ATSAMD21E15C-UUT's rich peripheral set, including up to six SERCOM instances that can simultaneously drive I2C sensors, SPI displays, and UART transceivers. The 48 MHz core runs Zigbee or Thread host stacks via external radio modules, while 32KB Flash accommodates application logic and OTA update mechanisms. The integrated 12-bit ADC and DAC support analog sensor interfaces for HVAC, lighting, and security subsystems. Operating from 1.62-3.63 V permits direct USB or wall-adapter powering without intermediate regulators. The WLCSP-35 footprint enables controller designs that fit behind standard wall outlets or in ceiling fixture housings.
Recomendado
Compact Consumer Electronics
Compact consumer products such as e-reader styluses, Bluetooth earbud charging cases, and miniature remote controls benefit from the ATSAMD21E15C-UUT's small WLCSP-35 footprint and rich peripheral integration. The device's 48 MHz Cortex-M0+ core supports capacitive touch sensing through the Peripheral Touch Controller (PTC) and runs UI animations on small OLED displays. Idle/Standby sleep modes plus SleepWalking peripherals minimize power consumption between user interactions, extending battery life in always-on accessories. The integrated Power-on Reset ensures clean cold-start behavior, while the configurable SERCOM block interfaces to Bluetooth Low Energy modules, I2C sensors, and SPI flash memory. The 85 C operating temperature range covers typical consumer use cases including warm enclosed environments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATSAMD21E15C-UUT — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATSAMD21E15B-AU | ATSAMD21E16C-UUT | ATSAML21E15B-MNT | ATSAMD20G17A-UUT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | WLCSP-35 | TQFP-32 | WLCSP-35 (same) | QFN-32 | WLCSP (smaller ball count) |
| Core | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ | ARM Cortex-M0+ (ultra-low-power) | ARM Cortex-M0+ |
| Max CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 32 KB | 32 KB | 64 KB | 32 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 8 KB | 4 KB | 16 KB |
| Operating Voltage | 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 |
Diferenciadores clave
- Ultra-compact WLCSP-35 footprint under 25 mm² (frente a ATSAMD21E15B-AU (TQFP-32))
- Latest revision C silicon with full feature set (frente a ATSAMD21E15A (revision A, NRND))
- Drop-in scalability within SAM D21E family (frente a ATSAMD21E16C-UUT (WLCSP-35, 64KB Flash))
Notas de diseño
The 35-ball WLCSP package requires precise PCB land pattern geometry matching the Microchip package outline. Ball pitch is approximately 0.4 mm and ball diameter is 0.25 mm nominal. Use NSMD (non-solder mask defined) pads with a solder mask opening of approximately 0.30 mm to ensure reliable reflow. Microchip recommends a PCB surface finish of ENIG or OSP for best WLCSP solder joint reliability. Avoid placing large components or mechanical fasteners within 2 mm of the WLCSP footprint to prevent package stress during assembly.
Place decoupling capacitors as close as possible to each VDD/VDDIO/VDDANA pin pair. Use a 100 nF ceramic on each digital supply pin and a 1 µF bulk capacitor on VDDANA. The ATSAMD21E15C integrates Power-on Reset (POR) and brown-out detection (BOD) but external decoupling ensures clean supply during high-current SERCOM switching events. Connect all GND balls to a solid ground plane with multiple vias for low-impedance return paths.
Avoid using SERCOM instances 0-5 without first configuring the GCLK (Generic Clock) source. The SAM D21 clock tree requires explicit setup of GCLK generators and channel routing before SERCOM peripherals become functional. The peripheral library (ASF) or Harmony framework provides clock initialization helpers - failing to call these in startup code is the most common cause of 'dead' peripherals on first prototypes. Also note that USB D+/D- pins (PA24, PA25) require a 1.5 kΩ pull-up on D+ for full-speed USB enumeration when used in device mode.
The WLCSP-35 package has limited thermal dissipation compared to QFP/QFN variants. Estimated: at 48 MHz active with all peripherals running, junction temperature rise is below 5°C above ambient under typical indoor conditions. However, in enclosed housings without airflow, monitor for thermal shutdown at sustained 48 MHz operation. The ATSAMD21E15C silicon revision C includes thermal sensor accessible via the SUPC peripheral for software-driven thermal management.
Información de cumplimiento
Per Mouser listing, the ATSAMD21E15C-UUT is Green-compliant (RoHS + halogen-free). Not AEC-Q100 qualified - choose ATSAMD21E15C-UUT is not automotive-grade; for automotive applications use SAM V71 or SAM S70 series.
