AT94K40AL-25DQI

Overview

The AT94K40AL-25DQI is a monolithic Field Programmable System Level Integrated Circuit (FPSLIC) combining an Atmel AT40K SRAM-based FPGA with an embedded high-performance AVR 8-bit RISC microcontroller. It features 40,000 usable FPGA gates and up to 36 Kbytes of dynamically allocated instruction and data SRAM. The device operates at a maximum frequency of 25 MHz with a supply voltage range of 3.0V to 3.6V. 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 designs.

Feature Summary

• Monolithic FPSLIC architecture integrating 40K-gate AT40K FPGA with AVR RISC core
• Up to 36 Kbytes of shared dual-port SRAM for program and data storage
• JTAG (IEEE 1149.1) interface for on-chip debugging and boundary-scan
• Dynamic reconfigurable logic (Cache Logic) allowing in-system FPGA updates
• Embedded peripherals including two UARTs, three timers/counters, and 2-wire serial interface

Applications

• Video compression and decompression systems requiring DSP functions
• Adaptive finite impulse response (FIR) filters and fast Fourier transforms (FFT)
• Encryption and convolution algorithms for multimedia applications
• Portable and handheld devices due to low static and dynamic power consumption
• Systems requiring custom peripheral integration via FPGA macro libraries

Procurement Notes

Verify the specific ordering suffix 'DQI' against the manufacturer's official documentation to confirm package type (Quad Flat Package) and industrial temperature range (-40°C to +85°C). Confirm that the 'J' designation for JTAG ICE support is included in the full part number or date code marking as per the datasheet guidelines. Ensure split power supply layout requirements are addressed during PCB design.

Selection Notes

Select this component when a system requires both high-density programmable logic and a dedicated microcontroller on a single die. The AT94K40AL variant provides 40,000 gates, suitable for complex arithmetic functions like DCT and FFT. Consider the 25MHz speed grade if real-time processing constraints exist within the 3.0V-3.6V operating window. Verify SRAM allocation needs, as up to 36Kbytes can be partitioned between program and data memory.

Part Context

This device belongs to the AT94KAL Series FPSLIC family, which pairs the AT40K FPGA core with the AVR Enhanced RISC architecture. The series includes variants with 5K, 10K, and 40K gates. The AT94K40AL represents the highest density option in this specific generation, offering 2,304 FPGA core cells and 2862 registers. It shares architectural features with the AT94SAL series but utilizes SRAM-based technology rather than flash.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Design migration within the same package footprint is supported by other members of the AT94KAL family (e.g., AT94K10AL), though gate counts and SRAM sizes will differ. Consult the manufacturer for current product lifecycle status and alternative recommendations.