ATSAM4SD32CA-AN - 120MHz Cortex-M4 MCU, 2MB Flash | Microchip
MPN: ATSAM4SD32CA-AN ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.2 | $132.00 |
| 100 | $11.85 | $1,185.00 |
| 500 | $10.6 | $5,300.00 |
| 1,000 | $9.45 | $9,450.00 |
ATSAM4SD32CA-AN Overview
An ARM Cortex-M4 microcontroller is a 32-bit core that combines Thumb-2 instruction efficiency with single-cycle MAC DSP extensions and an optional single-precision FPU. Within the Microchip SAM4S family hierarchy, the part belongs to the Cortex-M4 Flash MCU class and extends upward to the broader category of 32-bit embedded microcontrollers and ultimately to integrated circuits. Designers choose Cortex-M4 for deterministic real-time control with DSP capability at lower power and cost than Cortex-M7 parts.
Key features that differentiate the ATSAM4SD32CA-AN include 2 MB Flash (2M x 8) for ample code and data storage, 160 KB SRAM for stack and buffers, 79 programmable I/O lines, and the SAM4S peripheral set. The 100-pin LQFP footprint exposes the full peripheral set while remaining hand-solderable, and the 1.62V to 3.6V supply range allows single-Li-ion or 3.3V system-rail operation. A 120 MHz core clock plus the Cortex-M4 DSP extensions enable signal processing in firmware without an external DSP.
Typical applications include industrial control nodes, consumer appliances with USB device interfaces, smart metering, point-of-sale terminals, and PC peripherals. The combination of 2 MB Flash, USB, and the SAM4S peripheral mix makes the part a fit for connected embedded designs that previously required a separate MCU and memory-expansion device.
When designing with this device, ensure the LQFP-100 PCB land pattern matches the standard 14x14 mm body with 0.5 mm pitch. Provide a 1 uF plus 100 nF decoupling pair close to each VDDCORE and VDDIO pin, and follow the SAM4S errata sheet for any specific revision workarounds. Software development is supported through MPLAB X IDE, Atmel Studio, and ASF drivers.
This page combines verified distributor pricing, parametric cross-reference data, and application guidance for engineers evaluating the ATSAM4SD32CA-AN against SAM4S family siblings and competitor Cortex-M4 MCUs.
Drop-in alternatives for ATSAM4SD32CA-AN — 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 ATSAM4SD32CA-AN (same form factor and footprint) — differing in Package, Core, ADC, Operating Temperature, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ATSAM4SD32CA-ANR
✅ Drop-In✓ In Stock
$7.95 / Unit
View Datasheet →ATSAM4SD32BA-AU
✅ Drop-In✓ In Stock
$9.45 / Unit
View Datasheet →ATSAM4SD16CA-AN
✅ Drop-In✓ In Stock
$7.95 / Unit
View Datasheet →ATSAM4SA16CA-ANR
✅ Drop-In✓ In Stock
$5.38 / Unit
View Datasheet →ATSAM4S8CA-AU
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →ATSAM4SD32CA-AN Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit |
| Maximum Clock Speed | 120 MHz |
| Program Memory Size | 2 MB (2M x 8) Flash |
| RAM Size | 160 KB |
| Supply Voltage Range | 1.62 V to 3.6 V |
| Number of I/O | 79 |
| Package | 100-pin LQFP |
| Mounting Type | Surface Mount |
| Terminal Pitch | 0.50 mm |
| Connectivity | EBI/EMI, I2C, IrDA, Memory Card, SPI, SSC, UART/USART, USB |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
| Moisture Sensitivity Level | 3 |
ATSAM4SD32CA-AN 100-pin lqfp Pin Configuration Guide
Pin configuration for ATSAM4SD32CA-AN (100-pin lqfp 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 ATSAM4SD32CA-AN.
Refer to the datasheet for full pin configuration.
Typical Applications
ATSAM4SD32CA-AN is suitable for 6 applications: Industrial USB Device Controller, Smart Metering and Energy Monitoring, Consumer Appliance Control Board, Point-of-Sale Terminal, Connected Sensor Hub / IoT Gateway, PC Peripheral Device.
Industrial USB Device Controller
The ATSAM4SD32CA-AN suits industrial USB device designs thanks to its 2 MB Flash for USB stacks and class drivers plus its integrated USB 2.0 Full-Speed peripheral. With 160 KB SRAM buffering incoming isochronous or bulk transfers and 79 I/O for sensor or actuator interfaces, the MCU can host vendor-specific or HID-class firmware without an external memory device. The 1.62V to 3.6V supply allows direct 3.3V bus operation, and the Cortex-M4 120 MHz core delivers deterministic USB interrupt response for real-time HIDs. Estimated: a full USB CDC + vendor stack typically fits under 1.2 MB Flash, leaving room for application code.
Recommended
Smart Metering and Energy Monitoring
For smart electricity, water, or gas metering, the ATSAM4SD32CA-AN provides 2 MB Flash for secure firmware, metering libraries, and communication stacks plus the SAM4S ADC and timer peripherals for accurate measurement. The Cortex-M4 MAC unit accelerates FFT-based harmonic analysis on load current and voltage waveforms, while the SSC interface drives an isolated PLC or wireless M-Bus link. Its 1.62V to 3.6V range supports battery-backed meter operation, and the 100-pin LQFP simplifies layout for split energy/communication PCB sections. Estimated: a metering stack with DLMS/COSEM fits under 1 MB Flash.
Recommended
Consumer Appliance Control Board
The ATSAM4SD32CA-AN fits appliance control boards (washing machines, induction cookers, HVAC controllers) by combining a 120 MHz Cortex-M4 with PWM timers, DMA, and 79 I/O for motor control panels, user interfaces, and sensor inputs. The 2 MB Flash supports graphical HMI assets, multi-language strings, and field-updatable firmware, while the Cortex-M4 DSP extensions handle real-time motor control loops. SSC and UART peripherals drive Bluetooth or Wi-Fi connectivity modules, and the 1.62V to 3.6V supply accepts 3.3V or single-cell battery backup rails. Estimated: a graphical UI typically consumes 600-900 KB Flash.
Recommended
Point-of-Sale Terminal
Point-of-sale terminals need USB device connectivity, secure key storage, and a fast application processor, all of which the ATSAM4SD32CA-AN provides. Its 2 MB Flash accommodates payment-application libraries, EMV stacks, and display drivers, and the Cortex-M4 MAC extensions accelerate cryptographic primitives (AES, SHA) used in payment flows. The 79 I/O lines support a thermal printer, NFC card reader, keypad, and LCD panel, while the SSC interface drives an external audio prompt DAC. Estimated: an EMV stack with display graphics typically fits in 1.4 MB Flash, comfortably within 2 MB.
Recommended
Connected Sensor Hub / IoT Gateway
The ATSAM4SD32CA-AN serves as an IoT gateway MCU by aggregating multiple sensor buses (I2C, SPI, UART) and relaying data over Wi-Fi, Bluetooth, or LoRa modules via its SSC and USART peripherals. The 2 MB Flash fits TLS libraries, MQTT or CoAP stacks, and OTA update images for firmware longevity, and the Cortex-M4 DSP extensions perform on-device analytics such as vibration FFT or audio event detection. The 100-pin LQFP exposes enough I/O for multi-bus sensor arrays, and the 1.62V to 3.6V supply supports battery-powered sensors. Estimated: TLS 1.2 + MQTT stack typically consumes 400-700 KB Flash.
Recommended
PC Peripheral Device
PC peripherals such as high-end keyboards, USB audio interfaces, and docking stations leverage the ATSAM4SD32CA-AN's USB Full-Speed device, SSC (I2S), and 2 MB Flash for HID, audio class, and vendor-specific drivers. The Cortex-M4 120 MHz core handles audio sample buffering and HID polling at USB frame rates without jitter, while 79 I/O expose GPIOs for buttons, LEDs, and external codecs. The 100-pin LQFP allows the entire peripheral to fit on a 2-layer PCB, and the 1.62V to 3.6V range accepts USB bus-powered 3.3V rails directly. Estimated: USB audio class driver plus HID fits well under 1 MB Flash.
Recommended
Recommended Products Summary
Engineering reference data for ATSAM4SD32CA-AN — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATSAM4SD32CA-ANR | ATSAM4SD32BA-AU | ATSAM4SD16CA-AN | ATSAM4SA16CA-ANR | ATSAM4S8CA-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | LQFP-100 (0.50 mm pitch) | LQFP-100 - same | LQFP-100 - same | LQFP-100 - same | LQFP-100 - same | LQFP-100 - same |
| Core | ARM Cortex-M4 120 MHz | ARM Cortex-M4 120 MHz | ARM Cortex-M4 120 MHz | ARM Cortex-M4 120 MHz | ARM Cortex-M4 120 MHz | ARM Cortex-M4 120 MHz |
| Flash | 2 MB | 2 MB | 2 MB | 1 MB | 1 MB | 512 KB |
| SRAM | 160 KB | 160 KB | 160 KB | 160 KB | 160 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 | 1.62 V to 3.6 V |
| USB | Yes (Full-Speed) | Yes | Yes | Yes | Yes | Yes |
| I/O Count | 79 | 79 | 79 | 79 | 79 | 79 |
Key Differentiators
- Largest Flash in the SAM4S LQFP-100 family at 2 MB (vs ATSAM4SD16CA-AN)
- Drop-in pin compatibility with all SAM4S LQFP-100 siblings (vs ATSAM4S8CA-AU)
- Cortex-M4 DSP extensions in a single-chip 2 MB Flash MCU (vs ATSAM4SD32BA-AU)
Design Notes
Provide a 1 uF bulk plus 100 nF ceramic decoupling capacitor as close as possible to every VDDCORE and VDDIO pin pair. The SAM4S family datasheet (60001419B) recommends short, wide power traces to minimize transients during USB enumeration bursts. Estimated: a typical SAM4S design draws 60-90 mA active at 120 MHz with USB active, so the 3.3V regulator must source at least 150 mA with adequate thermal margin.
Maintain a continuous ground plane under the LQFP-100 footprint and route the 79 I/O signals on outer layers to avoid via stubs. The 0.50 mm pitch LQFP package benefits from 0.20 mm trace/space design rules; place series-termination resistors within 8 mm of output pins for SPI and SSC signals above 25 MHz. Reference the SAM4S-EK2 evaluation board layout as a starting point for USB DP/DN routing.
Always check the latest SAM4S errata sheet before locking the schematic. Common pitfalls include USB DP/DN pull-resistor placement, NRST reset-circuit RC values, and the 32.768 kHz crystal load capacitor selection for the RTC. The part ships in a 100-pin LQFP that is hand-solderable but requires a hot-air rework station for prototype swaps. Estimated: a wrong NRST cap value can cause intermittent reset failures at cold temperatures.
Compliance Information
RoHS and lead-free status per Microchip product page. Not AEC-Q100 qualified - choose SAM automotive variants for automotive designs. Halogen-free status not explicitly stated in verified data.
