ATSAM3S2CA-CUR - 64MHz Cortex-M3 MCU 128KB Flash | Microchip
MPN: ATSAM3S2CA-CUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.01 | $6.01 |
| 10 | $5.71 | $57.10 |
| 100 | $5.41 | $541.00 |
| 500 | $5.14 | $2,570.00 |
| 1,000 | $4.89 | $4,890.00 |
ATSAM3S2CA-CUR Overview
A microcontroller (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die, sitting at the center of the embedded-system hierarchy: MCU -> embedded processor -> semiconductor device. The SAM3S family from Microchip (originally Atmel) belongs to the 32-bit ARM Cortex-M class of flash microcontrollers, which are widely used where deterministic, energy-efficient control is required.
Key features include a 1.62V to 3.6V supply range supporting both 1.8V and 3.3V rails, operation from -40C to +85C for industrial environments, and a rich peripheral set: 12-bit ADC, 12-bit DAC, UART, USART, TWI (I2C), SPI, SSC, I2S, HSMCI, IrDA, and USB Device. The 79 programmable I/O lines give designers substantial expansion flexibility in a compact 9x9 mm ball grid array.
Technically, the Cortex-M3 core implements the ARMv7-M architecture with a 3-stage pipeline and Thumb-2 instruction set, delivering approximately 1.25 DMIPS/MHz. Flash acceleration logic allows full-speed 64MHz execution from embedded flash without wait-state penalties for most code. CMOS process technology keeps active power low, while the SAM3S power-management controller offers multiple sleep and wait modes for battery-conscious designs.
Typical applications include consumer and industrial devices with TFT LCD or segmented displays, battery-powered portable instruments, USB-connected data loggers, and motor or sensor control nodes. The generous peripheral mix makes the SAM3S2 a single-chip solution that avoids external bridge ICs.
A key design consideration: the 100-TFBGA package demands careful PCB stackup; plan for via-in-pad or dogbone fanout and follow the Microchip SAM3S hardware design guidelines for decoupling all VDDIO/VDDCORE ball pairs.
This page adds value beyond the manufacturer datasheet by consolidating distributor pricing, drop-in family alternatives, and practical design notes in one structured reference.
Drop-in alternatives for ATSAM3S2CA-CUR — 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 ATSAM3S2CA-CUR (same form factor and footprint) — differing in Core Processor, Package, Supply Voltage Range, Temperature Grade, Terminal Form.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM3S2CA-CU
✅ Drop-In✓ In Stock
$3.6 / Unit
View Datasheet →ATSAM3S4CA-CUR
✅ Drop-In📋 Reference alternative (not in catalog)
ATSAM3S8CA-CUR
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →ATSAM3S2CA-AUR
✅ Drop-In ⚠️ 参数待验证✓ In Stock
Contact for price
View Datasheet →ATSAM3S2CA-CUR Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M3 (32-bit) |
| Core Size | 32-Bit |
| Maximum Clock Frequency | 64 MHz |
| Flash Program Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Supply Voltage (Typical) | 1.8 V / 3.3 V |
| Operating Temperature | -40C to +85C |
| Package | 100-TFBGA (9x9 mm) |
| Number of I/O | 79 |
| ADC Resolution | 10-bit / 12-bit |
| DAC Resolution | 12-bit |
| Connectivity | HSMCI, I2C, I2S, IrDA, SPI, SSC, TWI, UART, USART, USB |
| Mounting Type | Surface Mount |
| Core Speed (DMIPS) | ~1.25 DMIPS/MHz (ARM Cortex-M3) |
| Technology | CMOS |
| RoHS Status | Compliant (per JLCPCB listing) |
ATSAM3S2CA-CUR 100-tfbga (9x9 mm) Pin Configuration Guide
Pin configuration for ATSAM3S2CA-CUR (100-tfbga (9x9 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATSAM3S2CA-CUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM3S2CA-CUR is suitable for 6 applications: Consumer TFT and Segmented Display Products, USB Data Loggers and PC-Connected Instruments, Battery-Powered Portable Measurement Devices, Industrial Control and Sensor Nodes, Audio and Voice Peripheral Systems, IoT Edge Nodes and Smart Home Devices.
Consumer TFT and Segmented Display Products
Microchip positions the SAM3S family explicitly for consumer and industrial products with TFT or segmented displays, and the ATSAM3S2CA-CUR fits this role with its 64MHz Cortex-M3 core, 128KB flash, and rich display-oriented peripherals. The EBI/SMC external bus and parallel interface drive segment LCD controllers, while HSMCI handles removable storage for graphics assets. With 79 I/O lines and 1.62V-3.6V operation, a single chip can drive the panel, touch keys, and USB link to a host. The compact 9x9 mm TFBGA-100 saves board area versus LQFP alternatives, and the -40C to +85C range covers non-climate-controlled consumer environments.
Recommended
USB Data Loggers and PC-Connected Instruments
The integrated USB Device 2.0 full-speed peripheral plus HSMCI for SD/microSD cards makes the ATSAM3S2CA-CUR a natural single-chip data logger. Firmware can enumerate as CDC or MSC while the 12-bit ADC samples sensor channels and writes to card storage, using the 32KB SRAM as a double-buffered FIFO between the analog front end and the card interface. The 64MHz core sustains sustained throughput without DMA starvation, and the SSC/I2S ports capture external codecs when audio-grade logging is required. Operating from 1.62V-3.6V allows direct powering from the USB VBUS through a 3.3V regulator, simplifying portable designs.
Recommended
Battery-Powered Portable Measurement Devices
For handheld meters and portable instruments, the ATSAM3S2CA-CUR combines a 1.62V-3.6V supply window with the SAM3S power-management controller's sleep and wait modes, letting the device spend most of its life in low-current standby between measurement bursts. The 12-bit ADC and 12-bit DAC support sensor excitation and measurement in one chip, while TWI and SPI interfaces connect precision front ends. At 64MHz the core completes DSP-style averaging quickly and returns to sleep, maximizing battery life. The -40C to +85C industrial range plus RoHS-compliant green TFBGA-100 package suits rugged handheld form factors with dense double-sided PCBs.
Recommended
Industrial Control and Sensor Nodes
The -40C to +85C operating range, wide 1.62V-3.6V supply tolerance, and standard industrial buses (UART, USART, TWI/I2C, SPI, SSC) make the ATSAM3S2CA-CUR a solid industrial sensor and control node. USART with IrDA support and the SSC enable legacy field wiring, while TWI connects multiple slave sensors on one bus. The 79 GPIOs drive relays, indicators, and discrete inputs directly through appropriate buffers, reducing external logic. Firmware with 128KB flash accommodates MODBUS-style stacks and OTA field-update code with room to spare, and the BGA package's short bond wires support cleaner signal integrity on noisy factory floors than longer-lead packages.
Recommended
Audio and Voice Peripheral Systems
The ATSAM3S2CA-CUR integrates an I2S/SSC serial audio interface and a 12-bit DAC, enabling compact voice-record and audio-playback subsystems without an external codec controller. The 64MHz Cortex-M3 runs G.711-class codecs and sample-rate conversion in software while SSC streams I2S data to an external codec or class-D amplifier. The 12-bit DAC can output alerts and simple tones directly, and the HSMCI reads compressed audio from SD media for standalone players. With 32KB SRAM, buffering for full-speed USB audio is achievable at moderate sample rates, and the 3.3V rail simplifies codec power tree design.
Recommended
IoT Edge Nodes and Smart Home Devices
Smart-home and IoT edge products benefit from the ATSAM3S2CA-CUR's balance of performance and integration: the 64MHz Cortex-M3 handles protocol stacks over USART/SPI-connected radio modules, the 12-bit ADC reads environmental sensors, and USB enables commissioning via a PC. The 1.62V-3.6V supply range tolerates battery sag, and power-management modes keep average consumption low for always-on sensing. 128KB flash stores both the application and an update bootloader for secure field upgrades over USB or radio. The 9x9 mm TFBGA-100 footprint keeps node PCBs compact for wall switches, plugs, and sensor pucks where enclosure volume is constrained.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM3S2CA-CUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM3S2CA-CU | ATSAM3S4CA-CUR | ATSAM3S8CA-CUR | ATSAM3S2CA-AUR |
|---|---|---|---|---|---|
| Package | 100-TFBGA (9x9 mm) | 100-TFBGA (9x9 mm) - same | 100-TFBGA (9x9 mm) - same | 100-TFBGA (9x9 mm) - same | 100-TFBGA (9x9 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | ARM Cortex-M3, 64 MHz | ARM Cortex-M3, 64 MHz | ARM Cortex-M3, 64 MHz | ARM Cortex-M3, 64 MHz | ARM Cortex-M3, 64 MHz |
| Flash Memory | 128 KB | 128 KB | 256 KB | 512 KB | 128 KB |
| Supply Voltage | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V | 1.62 V to 3.6 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C (verify grade suffix per datasheet) |
| Packaging Delivery | Tape & Reel (R suffix) | Tray | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Lowest-memory (lowest-cost) TFBGA-100 member of the SAM3S family (vs ATSAM3S4CA-CUR)
- Same-footprint upgrade path to 512KB (vs ATSAM3S8CA-CUR)
- Tape-and-reel delivery for automated assembly (vs ATSAM3S2CA-CU)
Design Notes
The 100-TFBGA (9x9 mm) package uses a fine-pitch ball grid requiring a planned fanout strategy. Use either via-in-pad with fill or dogbone escapes with 0.1-0.12 mm via lasers depending on fab capability, and define the land pattern per the Microchip SAM3S datasheet mechanical drawing. Decouple every VDDIO and VDDCORE ball pair with 100nF ceramic capacitors placed on the opposite board side directly under the die, plus bulk 10uF at the supply entry. Verify ball A1 polarity marker orientation against the datasheet before releasing the footprint.
The ATSAM3S2CA-CUR runs from a single 1.62V-3.6V rail, but the SAM3S power architecture separates VDDCORE and VDDIO domains; follow the SAM3S hardware design guidelines for the VDDCORE/VDDPLL connection scheme and any required sequencing. When powered from USB VBUS (5V), regulate to 3.3V with an LDO rated for at least the MCU plus peripheral load. Budget active current per the datasheet current-consumption tables at your target clock, and exploit the power-management controller sleep modes for duty-cycled battery designs - disable unused peripheral clocks in the PMC to cut run-mode current.
Three frequent mistakes on SAM3S designs: (1) floating unused GPIOs - configure them as grounded inputs or outputs-low to avoid erratic current and EMI susceptibility; (2) omitting the NRSTB pull-up and reset RC network, causing unreliable in-circuit programming; (3) programming the flash while VDDCORE is below the datasheet minimum, corrupting flash cells. Also confirm the exact ordering-code suffix when purchasing: the 'R' in ATSAM3S2CA-CUR denotes tape-and-reel delivery while 'CU' is tray - electrically identical but packaged differently.
Compliance Information
RoHS compliant per JLCPCB listing; Mouser identifies the part as 'BGA GREEN IND' (green molding compound, industrial temperature). REACH and conflict-minerals declarations not found in provided data - request formal certificates from Microchip.
