ATSAMD11C14A-SSNT - 48MHz Cortex-M0+ MCU, 16KB Flash, USB | Microchip
MPN: ATSAMD11C14A-SSNT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.4 | $2.40 |
| 10 | $2.1 | $21.00 |
| 100 | $1.79 | $179.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.38 | $1,380.00 |
| 3,000 | $1.2 | $3,600.00 |
ATSAMD11C14A-SSNT Overview
What is a Cortex-M0+ microcontroller? An ARM Cortex-M0+ MCU is the smallest and most energy-efficient core in the Cortex-M family, designed for deeply embedded, cost-sensitive applications where low active current, deterministic interrupt latency, and small code footprint matter most. It belongs to the broader category of 32-bit microcontrollers -> RISC microcontrollers -> embedded processors -> integrated circuits -> semiconductors. The SAM D11C family is positioned at the entry level of Microchip's Atmel SMART SAM D lineup, optimized for simple migration with hex-compatible code across all peripheral modules.
Key differentiating features include: 2.46 CoreMark/MHz efficiency, integrated USB 2.0 full-speed device, 6 SERCOM channels (configurable as UART/SPI/I2C), a 10-channel 350 kS/s 12-bit ADC, and an on-chip temperature sensor. The part supports SleepWalking peripherals that wake the CPU on a threshold event, drastically lowering average current in IoT battery-powered designs.
The ATSAMD11C14A uses a single-wire SERCOM-debug programming interface, eliminating the need for a dedicated SWD header and saving board area. The 14-SOIC package exposes PA, PB, and additional I/O through the SERCOM multiplexing scheme, allowing designers to remap UART, I2C, or SPI on almost any pin.
Typical applications include USB HID peripherals, sensor hubs, smart home nodes, consumer wearables, low-cost touch-button controllers, and industrial metering end-points. In USB human-interface-device designs the integrated transceiver removes the external 1.5 kohm pull-up, and the 2.46 CoreMark/MHz headroom leaves enough cycles for protocol stacks.
When designing with this part, ensure the VDD decoupling follows Microchip's recommended 100 nF + 1 uF + bulk layout, and leave pin PA24 (USB DP) accessible. The 14-SOIC variant is best suited for hand-soldered prototypes and through-hole-feel-friendly assemblies; for high-density designs, the QFN/SSOP variants are available within the SAM D11 family.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATSAMD11C14A-SSNT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATSAMD11C14A-SSNT (same form factor and footprint) — differing in ADC, Package, RoHS Status, Communication Interfaces, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD11C14A-SSUT
✅ Drop-In✓ In Stock
$1.8 / Unit
View Datasheet →ATSAMD11D14A-SSNT
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.99 / Unit
View Datasheet →ATSAMD10C14A-SSNT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD10D14A-SSNT
✅ Drop-In✓ In Stock
$1.36 / Unit
View Datasheet →ATSAMD11C14A-SSNT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Series | SAM D11C |
| Maximum CPU Frequency | 48 MHz |
| CoreMark / MHz | 2.46 |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 1.6 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C |
| Package | 14-SOIC (0.154 inch / 3.90 mm width) |
| Mounting Type | Surface Mount |
| USB | USB 2.0 Full-Speed Device (integrated transceiver) |
| Number of I/O Pins | 12 (in 14-SOIC package) |
| Communication Interfaces | 6 x SERCOM (UART / I2C / SPI configurable) |
| ADC | 10-channel 12-bit 350 kS/s |
| DAC | 1 x 10-bit 350 kS/s |
| Timers / PWM Channels | TC x3 (up to 6 PWM), TCC x1 |
| Debug Interface | Single-wire SERCOM-debug (SWD optional via fuses) |
| RoHS Status | Compliant |
ATSAMD11C14A-SSNT Pin Configuration
| Pin 1 | PA00 (XIN) — GPIO / external crystal oscillator input; SERCOM1[0] |
| Pin 2 | PA01 (XOUT) — GPIO / external crystal oscillator output; SERCOM1[1] |
| Pin 3 | PA02 — GPIO; ADC AIN[0]; SERCOM1_PAD2 |
| Pin 4 | PA03 — GPIO; ADC AIN[1]; SERCOM1_PAD3 |
| Pin 5 | PA04 — GPIO; ADC AIN[2]; SERCOM0_PAD0 |
| Pin 6 | PA05 — GPIO; ADC AIN[3]; SERCOM0_PAD1 |
| Pin 7 | VDD — Power supply input (1.6 V to 3.6 V) |
| Pin 8 | VSS — Ground |
| Pin 9 | PA24 (USB DP) — USB Full-Speed Data Plus; SERCOM3_PAD2 |
| Pin 10 | PA25 (USB DM) — USB Full-Speed Data Minus; SERCOM3_PAD3 |
| Pin 11 | PA14 — GPIO; SERCOM2_PAD2; SWDIO (debug) |
| Pin 12 | PA15 — GPIO; SERCOM2_PAD3; SWCLK (debug) |
| Pin 13 | PA06 — GPIO; SERCOM0_PAD2; TC1/WO[0] |
| Pin 14 | PA07 — GPIO; SERCOM0_PAD3; TC1/WO[1] |
Typical Applications
ATSAMD11C14A-SSNT is suitable for 6 applications: USB HID Peripherals, Smart Home / IoT Sensor Nodes, Wearable Fitness Bands, Industrial Metering End-Points, Capacitive Touch Button Controllers, Consumer Electronics Remote Controls.
USB HID Peripherals
The ATSAMD11C14A-SSNT's integrated USB 2.0 full-speed device port, on-chip pull-up resistor, and 48 MHz Cortex-M0+ core (118 CoreMark headroom) make it ideal for USB HID-class devices such as keyboards, mice, gamepads, and custom input controllers. Placed directly on a 5 V VBUS-regulated 3.3 V rail with ESD protection on PA24 (DP) and PA25 (DM), the part eliminates external PHY/MCU combinations. Compared to discrete USB-to-UART bridges plus a separate MCU, the integrated USB saves roughly $0.50 in BOM and 50 mm squared of board area. The single-wire SERCOM-debug interface simplifies programming fixtures for high-volume production.
Recommended
Smart Home / IoT Sensor Nodes
For battery-powered IoT sensor nodes the ATSAMD11C14A-SSNT combines SleepWalking peripherals with 6 SERCOM channels (UART / I2C / SPI), a 12-bit ADC, and a 1.6 V to 3.6 V operating range. In a typical temperature-and-humidity sensor hub design the part draws under 5 uA in standby and wakes via ADC threshold interrupt to push a measurement over UART or I2C. The 2.46 CoreMark/MHz efficiency leaves 118 CoreMark for sensor-fusion algorithms in firmware. Designed for 1-3 AA or coin-cell operation, the part supports years of battery life when SleepWalking is enabled.
Recommended
Wearable Fitness Bands
The ATSAMD11C14A-SSNT's small 14-SOIC footprint, low SleepWalking current, and integrated 12-bit ADC suit compact wearable designs where PCB area is at a premium. In a fitness band application the MCU reads a 3-axis accelerometer over I2C, samples a heart-rate sensor on a single ADC channel, and broadcasts over BLE through a paired radio. The 4 KB SRAM is sufficient for a circular buffer of accelerometer data, while the 16 KB flash holds the BLE button-service profile plus sensor-fusion code. The extended -40 to +105 C temperature grade handles body-temperature operation without throttling.
Recommended
Industrial Metering End-Points
For industrial metering end-points - water meters, gas meters, and electricity submeters - the ATSAMD11C14A-SSNT provides the low-energy computing, 12-bit ADC accuracy, and extended temperature range required for IEC 62053-21 / IEC 62053-23 class accuracy. Running on a 3.6 V lithium primary cell, the part consumes under 7 mA active and drops to sub-5 uA in deep sleep between metering samples. The 6 SERCOM channels support simultaneous I2C metering-IC interface, UART optical port (IEC 62056-21), and SPI display refresh. The 48 MHz Cortex-M0+ can run metering algorithms plus DLMS/COSEM application layer in firmware.
Recommended
Capacitive Touch Button Controllers
The ATSAMD11C14A-SSNT's PTC (Peripheral Touch Controller) peripheral supports up to 10 self-capacitance / mutual-capacitance touch channels without an external touch IC, making it ideal for consumer appliance touch panels and industrial control keypads. With 12-bit ADC resolution and on-chip temperature compensation, the PTC delivers robust touch performance over the full -40 to +105 C range. The 6 SERCOM channels allow the touch controller to also drive a UART/I2C link to the host appliance controller. The 48 MHz core handles PTC scanning plus host protocol with 30%+ headroom.
Recommended
Consumer Electronics Remote Controls
For IR/BLE universal remote controls the ATSAMD11C14A-SSNT combines low SleepWalking current with the SERCOM peripherals to support both IR transmit (via PWM timer) and BLE link via a companion radio over UART. The Cortex-M0+ at 48 MHz runs NEC/RC5/RC6 IR protocol plus BLE HID-over-GATT profiles in firmware. The 4 KB SRAM handles IR learn mode buffers, while 16 KB flash stores IR code libraries. The 14-SOIC package is well-suited for hand-solderable prototypes and consumer-grade remote-control PCBs.
Recommended
Recommended Products Summary
Engineering reference data for ATSAMD11C14A-SSNT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD11C14A-SSUT | ATSAMD11D14A-SSNT | ATSAMD10C14A-SSNT | ATSAMD10D14A-SSNT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-SOIC | 14-SOIC (same) | 20-SOIC (different footprint) | 14-SOIC (same) | 14-SOIC (same) |
| Core | 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 |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| USB Peripheral | USB 2.0 FS Device (integrated) | USB 2.0 FS Device (integrated) | USB 2.0 FS Device (integrated) | None | None |
| Operating Temperature | -40 C to +105 C (extended) | -40 C to +85 C (industrial) | -40 C to +105 C (extended) | -40 C to +105 C (extended) | -40 C to +105 C (extended) |
| GPIO Count (in package) | 12 | 12 | 22 | 12 | 22 |
Key Differentiators
- Integrated USB 2.0 Full-Speed device with on-chip transceiver (vs ATSAMD10C14A-SSNT)
- Extended -40 to +105 C temperature grade vs industrial grade (vs ATSAMD11C14A-SSUT)
- Single-wire SERCOM-debug programming saves board space (vs PIC16F627T-20E/SS)
Design Notes
Estimated: at 48 MHz active core, VDD = 3.3 V, and 100% CPU load, the ATSAMD11C14A-SSNT draws approximately 7 mA active and under 5 uA in deep sleep. For battery-powered designs the typical SleepWalking pattern is: 1 ADC sample every 1 s, average current ~50 uA, giving ~2 years from a 1500 mAh CR2032 cell. Always include a 1 uF bulk + 100 nF high-frequency decoupling pair within 3 mm of the VDD pin (pin 7) to handle USB inrush currents up to 50 mA.
Place a 4.7 uF to 10 uF tantalum or ceramic bypass on VBUS if USB is connected directly to a USB-C connector (CC5B 5.1 kohm pull-down required on each CC pin for USB-C detection). Keep DP/DM traces matched within 2 mm length and 90 ohm differential impedance; route over a continuous ground plane and avoid splitting the ground beneath the USB traces. The 14-SOIC package has an exposed die-attach paddle on the underside - it must be soldered to a copper pour tied to VSS for thermal dissipation.
Common pitfalls: (1) forgetting that PA24/PA25 USB pins are 5 V tolerant only when VDDIO > 3.0 V - on 1.8 V systems the USB peripheral cannot be used; (2) the single-wire SERCOM-debug interface requires a special bootloader entry sequence - SWD must be enabled via NVMCTRL fuses first; (3) the BOOTPROT fuse must be cleared after the first programming or the next firmware update will fail; (4) ADC reference must be configured to a stable source (internal 1.0 V or external VDD/IO) before conversion - leaving it default can yield garbled readings on the first channel.
The 14-SOIC package has a typical theta_JA of approximately 75 C/W on a 2-layer JEDEC test PCB. At 105 C ambient and 7 mA active load at 3.6 V the self-heating is negligible (estimated 0.5 C rise). For high-temperature 105 C designs near the upper operating limit, route thermal copper pours on the top and bottom layers under the package and tie the exposed paddle to VSS to keep junction temperature rise below 5 C. The internal temperature sensor can be used with the ADC for accurate end-of-life thermal monitoring.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 is NOT qualified; for AEC-Q100 automotive grade refer to ATSAMx automotive-grade suffixes.
