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Product Detailed Parameters
- Description：IC USB MCU W/HUB,ADC,PWM 64LQFP
- Series：AVR®
- Mfr：Microchip Technology
- Package：Tray
- Applications：USB Microcontroller
- Core Processor：AVR
- Program Memory Type：SRAM (24kB)
- Controller Series：AT43USB
- RAM Size：1K x 8
- Interface：SPI, 3-Wire Serial
- Number of I/O：27
- Voltage - Supply：4.4V ~ 5.25V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：64-LQFP
- Supplier Device Package：64-LQFP (10x10)
- Grade：-
- Qualification：-
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Overview
The AT43USB355E-AU is a full-speed USB AVR-based microcontroller featuring an embedded USB 1.1 compliant hub, designed primarily for game controller applications. It integrates a high-performance AVR RISC core with 24K bytes of downloadable SRAM program memory and 1K byte internal SRAM. The device provides 27 programmable I/O pins, a 12-channel 10-bit ADC, and two PWM outputs. It operates at 5V with on-chip 3.3V regulators and utilizes a 64-lead LQFP package.
Feature Summary
- Integrated USB 1.1 Hub Controller with 3 downstream ports (2 external, 1 attached)
- Full-Speed USB Function Controller with 4 endpoints
- AVR RISC Microcontroller with 24K Bytes Downloadable SRAM and 1K Byte Internal SRAM
- 12-Channel 10-bit A-to-D Converter and Dual PWM Outputs
Applications
- Game controllers
- Joysticks
- Racing wheels
- Gamepads
Procurement Notes
Verify the component manufacturer as Atmel Corporation based on the provided datasheet documentation. Confirm that the 'E' suffix denotes the version with downloadable SRAM program memory loaded from external serial Flash/EEPROM during power-on reset. Ensure compatibility with standard AVR development tools such as C compilers and in-circuit emulators.
Selection Notes
Select the AT43USB355E-AU when firmware flexibility via downloadable SRAM is required, as opposed to the masked ROM version (AT43USB355M). This part supports 5V operation with integrated 3.3V regulation. Consider the 64-lead LQFP package dimensions and the availability of specific development kits for common USB application firmware source code.
Part Context
The AT43USB355 belongs to the AT43USB series of USB AVR microcontrollers. The AT43USB355E variant is functionally and pin-compatible with the AT43USB355M, which differs only in having firmware stored in masked ROM rather than downloadable SRAM. Both versions share the same hardware architecture and peripheral set.
Replacement Considerations
The AT43USB355M is a pin and function compatible alternative within the same family, distinguished by its masked ROM program memory instead of downloadable SRAM.
