AT75C220-C256

Microprocessors Overview

The AT75C220 is a Smart Internet Appliance Processor (SIAP) featuring an ARM7TDMI core running at 40 MIPS and an OakDSPCore co-processor operating at 60 MIPS. It integrates dual Ethernet 10/100 Mbps MAC interfaces, 88K bytes of fast RAM, and a 256 x 32-bit boot ROM. The device includes an on-chip SDRAM controller, three 16-bit timers/counters, two USARTs with FIFO, and an SPI interface. Power requirements are 2.5V for the core and PLL pins, and 3.3V for I/O. It is available in a 208-lead PQFP package.

Microprocessors Feature Summary

• Dual Ethernet 10/100 Mbps MAC interface with voice priority
• Integrated OakDSPCore for autonomous voice processing
• On-chip SDRAM controller and flexible external bus interface
• Comprehensive peripheral set including USARTs, SPI, and timers

Microprocessors Applications

• Ethernet IP phones
• Professional internet appliance applications
• VoIP protocol stack implementation
• Voice compression and acoustic echo cancellation systems

Microprocessors Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors or official channels. Confirm datasheet revision and package type match project specifications. Ensure supply chain integrity to avoid counterfeit components. Check for specific ordering suffixes that may indicate package variations or temperature ranges. Validate compliance with relevant industry standards before integration.

Microprocessors Selection Notes

Select this processor for applications requiring simultaneous high-performance control and digital signal processing. The dual-core architecture allows the ARM7TDMI to manage system tasks while the OakDSPCore handles voice algorithms. Consider the integrated dual MAC for network redundancy or separate voice/data traffic handling. Evaluate software support availability for Linux and DSP libraries during the design phase.

Microprocessors Part Context

The AT75C220 belongs to Atmel's Smart Internet Appliance Processor family, designed specifically for professional internet appliances. It combines a standard ARM7TDMI microcontroller with a specialized DSP subsystem to address VoIP requirements efficiently. This integration reduces component count and board space compared to discrete solutions.

Microprocessors Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.