ATSAMD09C13A-SSUT - ARM Cortex-M0+ 48MHz 8KB Flash MCU | Microchip
MPN: ATSAMD09C13A-SSUT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.48 | $148.00 |
| 500 | $1.34 | $670.00 |
| 1,000 | $1.21 | $1,210.00 |
| 3,000 | $1.08 | $3,240.00 |
ATSAMD09C13A-SSUT Overview
What is a Cortex-M0+ microcontroller? A microcontroller (MCU) is a single-chip computer integrating a CPU core, memory, and peripherals. The Cortex-M0+ is ARM's smallest and most energy-efficient application processor core, optimized for deterministic embedded control. Within the SAM family it sits below Cortex-M3/M23/M4 parts, giving designers the simplest path to 32-bit performance at 8-bit pricing. The ATSAMD09C13A-SSUT belongs to the SAM D09 sub-family of low-pin-count, USB-equipped Cortex-M0+ devices that target human-interface and consumer products.
Key features include a 48 MHz core, single-cycle multiplier, hardware divide, an 8-channel 10-bit 350 ksps ADC, four SERCOM-configurable serial interfaces (usable as UART, SPI, or I2C), and a full-speed USB 2.0 device controller. The peripheral event system and Sleepwalking peripherals enable low-power operation while maintaining fast wake-up, which is essential for battery-powered or energy-harvesting applications.
From an architecture perspective, the device uses the standard SAM D0 peripheral set with a 32-bit AHB bus matrix and separate AHB/APB bridges. The Flash controller supports in-application programming and a 512-byte user row for EEPROM emulation. The 8 KB Flash / 4 KB SRAM split matches typical small-form-factor IoT nodes, and the USB device stack can share the same 4 KB SRAM with the application thanks to dedicated DMA.
Typical applications include USB HID peripherals such as keyboards, mice, and touch panels; smart-home sensor endpoints; low-cost consumer toys and wearables; metering and home-automation nodes; and industrial control buttons and LED drivers. The combination of a tiny 14-pin footprint with USB and capacitive touch support makes it especially attractive for human-interface devices.
When designing with the ATSAMD09C13A-SSUT, ensure the 1.62 V-3.63 V supply is well decoupled and that VBUS routing for the USB D+/D- lines follows USB 2.0 high-speed layout rules (90 ohm differential impedance, common-mode choke optional). The boot ROM supports bootloader entry via the BOOT pin, enabling field firmware updates without an external programmer.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design considerations beyond the manufacturer datasheet to accelerate component evaluation.
Drop-in alternatives for ATSAMD09C13A-SSUT — 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 ATSAMD09C13A-SSUT (same form factor and footprint) — differing in ADC, MSL Level, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAMD11C14A-SSUT
✅ Drop-In✓ In Stock
$1.8 / Unit
View Datasheet →ATSAMD09C13A-SSNT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD09C13A-MUT
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAMD09C13A-SSUT Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0+ (32-bit) |
| Family | SAM D09 |
| Maximum CPU Frequency | 48 MHz |
| Flash Memory | 8 KB (8K x 8) |
| SRAM | 4 KB |
| Operating Voltage Range | 1.62 V to 3.63 V |
| GPIO Count | Up to 12 |
| Package | 14-SOIC (150 mil) |
| Mounting Type | Surface Mount |
| USB Interface | USB 2.0 Full-Speed Device |
| ADC | 10-bit, up to 350 ksps |
| Serial Communication | Up to 4 SERCOM (UART/SPI/I2C configurable) |
| Operating Temperature Range | -40C to +85C |
| RoHS Status | Compliant |
| MSL Level | 1 |
ATSAMD09C13A-SSUT Pin Configuration
| Pin 1 | PA00/XIN — GPIO PA00 / external clock input |
| Pin 2 | PA01/XOUT — GPIO PA01 / external clock output |
| Pin 3 | PA02/AIN0 — GPIO PA02 / ADC input channel 0 |
| Pin 4 | PA03/AIN1 — GPIO PA03 / ADC input channel 1 |
| Pin 5 | GND — Ground |
| Pin 6 | VDD — Power supply |
| Pin 7 | PA04/SWDIO — GPIO PA04 / programming data (SWDIO) |
| Pin 8 | PA05/SWCLK — GPIO PA05 / programming clock (SWCLK) |
| Pin 9 | PA06/USB_DP — GPIO PA06 / USB D+ |
| Pin 10 | PA07/USB_DM — GPIO PA07 / USB D- |
| Pin 11 | RESET — Reset (active low) |
| Pin 12 | PA08 — GPIO PA08 |
| Pin 13 | PA09 — GPIO PA09 |
| Pin 14 | PA10 — GPIO PA10 |
Typical Applications
ATSAMD09C13A-SSUT is suitable for 7 applications: USB HID Peripherals (Keyboard/Mouse/Touchpad), Home Automation Sensor Nodes, Wearable Fitness Bands, Industrial Control Buttons and LED Drivers, Smart Consumer Toys and Appliances, Capacitive Touch Buttons and Sliders, IoT Sensor Hubs.
USB HID Peripherals (Keyboard/Mouse/Touchpad)
The ATSAMD09C13A-SSUT integrates a full-speed USB 2.0 device controller and 12 GPIO pins in a 14-SOIC, making it ideal for USB HID peripherals such as keyboards, mice, touch panels, and consumer remote controls. The 48 MHz Cortex-M0+ runs the USB HID stack inside 4 KB SRAM, while 8 KB Flash holds application firmware, HID report descriptors, and bootloader code. Designers benefit from Microchip's free ASF4 USB stack and the SAM D09's low pin count, which simplifies PCB layout for space-constrained human-interface products. Sleep modes and the peripheral event system let the device enter idle between user inputs, extending battery life in wireless HID dongles.
Recommended
Home Automation Sensor Nodes
The ATSAMD09C13A-SSUT suits low-power sensor endpoints such as temperature, humidity, and occupancy nodes used in home-automation and metering networks. Its 1.62-3.63 V supply range lets it run from a single CR2032 coin cell or 2xAA alkaline pack without a boost converter, and the 10-bit ADC reads analog sensors directly. SERCOM channels can be configured as I2C for digital sensor front-ends, while the peripheral event system wakes the CPU only on threshold crossings, reducing average current to a few microamps. The Cortex-M0+ executes Atmel/Microchip's certified Zigbee or LoRa stacks inside 8 KB Flash when paired with an external radio.
Recommended
Wearable Fitness Bands
Wearables such as fitness bands, smart watches, and step-counter bracelets leverage the ATSAMD09C13A-SSUT's low active current and tiny footprint. The 14-SOIC consumes roughly 70 microamps per MHz at full clock, so a 1 MHz sampling mode draws under 100 microamps while reading an accelerometer or optical heart-rate sensor. Its Cortex-M0+ core drives simple BLE radio co-processors over UART or SPI, with the SERCOM peripheral reassigning pins as needed. The 4 KB SRAM is sufficient for short sensor buffers, while 8 KB Flash accommodates BLE controller AT commands and motion-processing firmware.
Recommended
Industrial Control Buttons and LED Drivers
Industrial control panels benefit from the ATSAMD09C13A-SSUT's wide 1.62-3.63 V tolerance, which handles 24 V bus rails when paired with a simple linear regulator. Its 12 GPIO can drive up to 12 LEDs directly via PWM, allowing multi-segment indicator lamps, fault annunciators, or button backlighting without an external driver. The Cortex-M0+ executes debouncing and button-matrix scanning algorithms with deterministic latency, making the part suitable for safety-related human-machine interface (HMI) terminals. The 8 KB Flash supports MODBUS RTU or proprietary industrial protocols over UART.
Recommended
Smart Consumer Toys and Appliances
Consumer toys, kitchen appliances, and small gadgets use the ATSAMD09C13A-SSUT for cost-sensitive 32-bit performance. Its 8 KB Flash stores motor-control firmware, BLE command sets, and audio sample tables, while the Cortex-M0+ handles button decoding, PWM-driven motors, and simple audio effects. The integrated USB 2.0 FS device lets the same hardware serve as both the production MCU and the field-update target, eliminating external programmers and reducing BOM cost. With hobbyist-friendly tools such as Arduino Zero bootloaders and CircuitPython firmware, the SAM D09 also accelerates prototyping for educators.
Recommended
Capacitive Touch Buttons and Sliders
The ATSAMD09C13A-SSUT integrates Microchip's QTouch capacitive-touch peripheral, supporting up to 12 self-cap or mutual-cap touch channels via 12 GPIO. Designers can implement touch buttons, sliders, and wheels without an external touch controller, reducing BOM cost in kitchen appliances, automotive center consoles, and consumer electronics. The peripheral event system wakes the CPU only on touch events, allowing sub-10 microamp standby current in battery-powered touch remotes. Combined with the 14-SOIC's small footprint, this enables single-chip touch interfaces for space-constrained industrial controls.
Recommended
IoT Sensor Hubs
IoT sensor hubs that aggregate data from environmental, motion, and proximity sensors use the ATSAMD09C13A-SSUT as a low-cost aggregator. The four SERCOM peripherals allow simultaneous I2C, SPI, and UART connectivity to multiple sensors, while the 10-bit ADC reads analog sources such as gas sensors or strain gauges. With a Cortex-M0+ running at 48 MHz, the device executes lightweight edge-processing algorithms such as moving averages or peak detection before forwarding data over UART to a gateway. The wide 1.62-3.63 V range simplifies power-tree design in solar-powered or energy-harvesting nodes.
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Recommended Products Summary
Engineering reference data for ATSAMD09C13A-SSUT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAMD11C14A-SSUT | ATSAMD09C13A-SSNT | ATSAMD09C13A-MUT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Package | 14-SOIC | 14-SOIC - same | 14-SOIC - same | 20-QFN |
| Core | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit |
| Maximum CPU Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 8 KB | 16 KB (+100%) | 8 KB (same) | 8 KB (same) |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Voltage Range | 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 | -40C to +85C | -40C to +85C | -40C to +105C | -40C to +85C |
| USB Interface | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device |
Key Differentiators
- Higher Flash in same 14-SOIC footprint (vs ATSAMD11C14A-SSUT)
- Wider operating temperature for harsh environments (vs ATSAMD09C13A-SSNT)
- QFN option for tighter PCB layouts (vs ATSAMD09C13A-MUT)
Design Notes
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the supply pin, plus a bulk 4.7 uF capacitor to handle USB inrush events. The ATSAMD09C13A-SSUT internally regulates the digital core from VDD, so no external core voltage rail is required. If the design runs from USB VBUS, include a 4.7 uF tantalum or ceramic bypass and verify that VBUS remains above 4.0 V during enumeration.
Route the USB D+ and D- pair as a 90 ohm differential impedance match on a continuous ground reference plane. Keep the pair length-matched within 2 mm, and place the common-mode choke and series ferrite beads close to the connector. For the 14-SOIC package, route the SWDIO/SWCLK signals away from switching power nodes to avoid programming glitches.
Do not load GPIO pins beyond the datasheet absolute maximum of 10 mA per pin or 80 mA total across all GPIO. When driving multiple LEDs, place a series resistor on each GPIO and verify cumulative dissipation does not exceed 200 mW. Also, ensure the BOOT and RESET pins are pulled high with at least 10 kohm at power-up to enter normal application mode.
Compliance Information
RoHS compliant per Microchip product page; ECCN 3A991.a.2 export classification. SAM D09 family is not AEC-Q100 qualified; choose ATSAMC20/C21 for automotive grade.
