As embedded systems continue to shrink in size while growing in complexity, choosing the right microcontroller becomes critical. The AT91SAM7S64C-AU, part of Microchip’s AT91SAM7S series, offers an excellent blend of performance, efficiency, and integrated peripherals in a compact package. Based on the widely adopted ARM7TDMI® core, this microcontroller is ideal for industrial automation, consumer electronics, portable instrumentation, and more.
At DRex Electronics, we support global sourcing needs for embedded developers, OEMs, and contract manufacturers — including hard-to-find microcontrollers like the AT91SAM7S64C-AU.
What is the AT91SAM7S64C-AU?
The AT91SAM7S64C-AU is a 32-bit ARM7TDMI-based microcontroller, offering 64KB of Flash memory and a wide array of built-in peripherals. It’s part of the AT91SAM7S family, designed for low-to-medium complexity applications that demand reliable processing, real-time control, and USB connectivity.
🔎 Key Part Info:
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Part Number: AT91SAM7S64C-AU
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Core: ARM7TDMI
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Manufacturer: Microchip Technology
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Package: 64-pin LQFP (AU suffix)
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Operating Temp: –40°C to +85°C (Industrial Grade)
AT91SAM7S64C-AU Technical Specifications
| Feature | Details |
|---|---|
| Core Architecture | ARM7TDMI (32-bit RISC) |
| Max Operating Frequency | 55 MHz |
| Flash Memory | 64 KB |
| SRAM | 16 KB |
| Embedded ROM | 8 KB (BootROM) |
| I/O Lines | Up to 32 GPIOs |
| Timers | 3 x 16-bit timers |
| USARTs | 2 (for RS-232/RS-485 communication) |
| SPI Interfaces | 1 |
| TWI (I²C) | 1 |
| USB Interface | USB 2.0 Full-Speed Device |
| ADC | 8-channel, 10-bit ADC |
| Watchdog Timer | Yes |
| Voltage Range | 1.65V – 1.95V (Core), 3.0V – 3.6V (I/O) |
| Package | LQFP-64 (AU) |
📄 For a complete breakdown, refer to the official AT91SAM7S64 datasheet (external link).
Key Features and Advantages
The AT91SAM7S64C-AU is tailored for applications requiring fast execution, reliable serial communication, and USB functionality — all without the overhead of high-end SoCs.
✅ Benefits Overview:
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ARM7TDMI Core
Delivers efficient, low-power 32-bit processing with wide industry support. -
Full-Speed USB 2.0
Integrated USB device support enables plug-and-play connectivity for data acquisition systems, portable devices, and PC-interfacing applications. -
Rich Analog Features
On-chip 10-bit ADC supports up to 8 channels for sensor-rich or analog-input-heavy systems. -
Multiple Communication Interfaces
Includes USART, SPI, TWI (I²C), ideal for multi-protocol industrial systems. -
Flexible GPIO and Timer Configuration
Suitable for control loops, signal measurement, and I/O expansion in real-time environments.
Browse more ARM-based microcontrollers from Microchip, NXP, and Texas Instruments at DRex Electronics.
Applications of AT91SAM7S64C-AU
Thanks to its mix of performance, peripherals, and ease of development, the AT91SAM7S64C-AU is widely adopted in:
1. Industrial Automation
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Real-time data loggers
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Control panels and HMIs
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Smart sensors and I/O modules
2. Consumer Electronics
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USB-powered smart gadgets
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IR remotes and display modules
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Media control and interface devices
3. Medical Equipment
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Portable diagnostic tools
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Wearable health monitors
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USB interface for patient data logging
4. Test & Measurement
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Oscilloscopes, logic analyzers
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USB communication tools
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Embedded calibration and diagnostics
Need components with extended life and low power for long-term embedded systems? Explore our curated range of microcontrollers and SoCs built for industrial environments.
Comparison: AT91SAM7S64C-AU vs Similar MCUs
| Feature | AT91SAM7S64C-AU | LPC2148 (NXP) | STM32F103C8T6 (ST) |
|---|---|---|---|
| Architecture | ARM7TDMI | ARM7TDMI | ARM Cortex-M3 |
| Max Speed | 55 MHz | 60 MHz | 72 MHz |
| Flash | 64 KB | 512 KB | 64 KB |
| USB Support | USB Device | USB Device | USB Device |
| ADC Channels | 8 x 10-bit | 14 x 10-bit | 10 x 12-bit |
| Package | LQFP-64 | LQFP-64 | LQFP-48 |
While newer Cortex-M3-based MCUs offer more raw performance, the AT91SAM7S64C-AU remains a dependable choice for legacy support, mature toolchains, and ultra-stable applications.
Development Tools and Ecosystem
Microchip and third-party vendors offer comprehensive tools for easy development with the AT91SAM7S64C-AU.
🔧 Recommended Tools:
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MPLAB X IDE – Microchip’s integrated development environment
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Atmel Studio (legacy support) – Full-featured IDE for ARM7
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SAM-ICE Debugger – JTAG/SWD interface for debugging and programming
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GCC ARM Toolchain – Open-source compiler support
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CMSIS – ARM standard peripheral libraries
💡 You can explore open-source projects and libraries on GitHub to jumpstart development using the AT91SAM7S platform.
Why Source AT91SAM7S64C-AU from DRex Electronics?
At DRex Electronics, we empower OEMs and system designers with reliable component sourcing, even for niche or legacy MCUs like the AT91SAM7S64C-AU.
✅ Why choose DRex?
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🌍 Global inventory access — EOL and allocated parts available
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🕒 Fast turnaround and delivery
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🔐 ISO 9001-certified supply chain
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📞 Expert support for sourcing, technical compatibility, and logistics
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💼 Bulk order support for industrial and long-lifecycle applications
Looking for ARM7 or Cortex-M series MCUs? Check out our Microchip MCU inventory or contact us directly for tailored sourcing solutions.
Final Thoughts
The AT91SAM7S64C-AU remains a reliable and efficient choice for embedded systems that require solid USB capability, flexible analog/digital I/O, and mature ARM7 performance. Its continued use across industrial, consumer, and medical sectors speaks to its stability, support ecosystem, and development simplicity.
📦 Ready to bring the AT91SAM7S64C-AU into your design?
Request a quote from DRex Electronics — your trusted partner for efficient, global component sourcing.
