AT94K40AL-25BQI

Overview

The AT94K40AL-25BQI is a monolithic Field Programmable System Level Integrated Circuit (FPSLIC) combining an Atmel AT40K SRAM-based FPGA with an embedded AVR 8-bit RISC microcontroller. It features 40,000 usable FPGA gates and up to 32 Kbytes of programmable instruction/data SRAM. The device operates at a maximum frequency of 25 MHz within a 3.0V to 3.6V supply range. Key specifications include a hardware multiplier, JTAG ICE support, two UARTs, and multiple timer/counters. Fabricated on a 0.35µm CMOS process, it supports dynamic reconfiguration via Cache Logic and provides extensive I/O capabilities for complex digital applications.

Feature Summary

• Integrated AT40K FPGA core with 40,000 gates and distributed FreeRAM
• Embedded high-performance AVR 8-bit RISC microcontroller with hardware multiplier
• Up to 32 Kbytes of shared dual-port SRAM for program and data storage
• JTAG (IEEE 1149.1) interface for in-system debugging and programming

Applications

• Video compression and decompression systems
• Adaptive finite impulse response (FIR) filters and FFT implementations
• Encryption and convolution algorithms
• Multimedia processing applications requiring dynamic logic reconfiguration

Procurement Notes

Verify the specific suffix 'BQI' against official Microchip documentation to confirm package type and temperature grade. Ensure compatibility with the System Designer software suite for development. Confirm power supply requirements align with the 3.0V to 3.6V operating range specified for the AL series.

Selection Notes

Select this component when both high-density FPGA logic and a powerful microcontroller are required on a single die. The AT94K40AL offers 40K gates, suitable for complex arithmetic functions like DCT and FFT. Consider the split power supply layout requirement for optimal performance and noise isolation between the FPGA and AVR cores during PCB design.

Part Context

This part belongs to the AT94KAL Series FPSLIC family, which integrates SRAM-based FPGAs with AVR cores. It shares architectural similarities with the AT94K05AL and AT94K10AL but provides significantly higher gate counts (40K vs 5K/10K) and larger SRAM capacities. The device utilizes the patented AT40K architecture with FreeRAM and Cache Logic capabilities.

Replacement Considerations

Direct replacements within the same family include the AT94K10AL or AT94K05AL if lower gate counts are acceptable. For non-FPSLIC FPGA needs, the standalone AT40K series may be considered, though it lacks the integrated AVR core. Verify pinout compatibility as pin locations are consistent across the FPSLIC family for easy migration.