AT91SAM7S64-AU Microchip Integrated Circuit (Quad Flat Packages) In Stock
AT91SAM7S64-AU is a 32-bit ARM7TDMI-based microcontroller from Microchip (formerly Atmel) featuring 64 KB Flash and 16 KB SRAM running at up to 55 MHz in a compact LQFP-64 package. It integrates USB 2.0 full-speed device, SPI, USART, and TWI peripherals for versatile embedded connectivity. Available from stock worldwide with same-day shipping options.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 64
- Lifecycle
- ACTIVE
- Datasheet
- AT91SAM7S64-AU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32-bit ARM7TDMI-S core running at up to 55 MHz with a 16-bit Thumb instruction set for code-density savings
- 64 KB embedded Flash with single-cycle access at full speed enabling fast program execution without wait states
- USB 2.0 full-speed device controller with on-chip transceiver eliminating the need for an external USB PHY
- Rich peripheral set including SPI, 2x USART, TWI, and 10-bit ADC with 8 channels in a 64-pin LQFP package
Applications
The AT91SAM7S64-AU is well suited for USB peripheral device designs such as HID controllers, virtual COM port adapters, and data loggers that require 64 KB Flash and an on-chip USB 2.0 full-speed interface at 55 MHz. Its compact LQFP-64 package and integrated analog and digital peripherals make it a practical choice for industrial sensor nodes, handheld instruments, and consumer electronics. The device is also used in legacy embedded designs that benefit from the ARM7 ISA and Atmel SAM architecture ecosystem.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the core and memory specifications of the AT91SAM7S64-AU microcontroller?
The AT91SAM7S64-AU integrates a 32-bit ARM7TDMI-S processor core operating at up to 55 MHz, 64 KB of embedded Flash memory with single-cycle access, and 16 KB of on-chip SRAM. These specifications provide sufficient throughput and storage for USB device firmware stacks, communication protocol handlers, and embedded control applications without external memory.
Does the AT91SAM7S64-AU include USB support and how does it simplify board design?
Yes, the AT91SAM7S64-AU integrates a USB 2.0 full-speed device controller with an on-chip transceiver operating at 12 Mbps, which eliminates the need for an external USB PHY chip. This reduces component count by at least 1 to 2 ICs per design, simplifying the PCB layout and reducing the BOM cost for USB-connected embedded products such as measurement devices and HID interfaces.
What communication interfaces are available on the AT91SAM7S64-AU for sensor and peripheral connectivity?
The AT91SAM7S64-AU provides 2 USART channels, 1 SPI bus, and a TWI (I2C-compatible) interface, alongside an 8-channel 10-bit ADC and USB 2.0. This peripheral combination allows simultaneous connection to RS-232 or RS-485 serial devices, SPI sensors such as accelerometers, I2C EEPROMs, and analog transducers within a single 64-pin LQFP package.
When should designers choose the AT91SAM7S64-AU over a newer Cortex-M0 based device?
The AT91SAM7S64-AU is a valid choice for designs that must maintain software compatibility with existing ARM7TDMI codebases or where the SAM7S peripheral register map is already qualified in a certified product. Its 55 MHz speed, 64 KB Flash, and on-chip USB 2.0 full-speed device meet the requirements of many embedded applications without redesigning firmware for a Cortex-M0 or M3 architecture.
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