AT94K05AL-25AJC

Overview

The AT94K05AL-25AJC is a Field Programmable System Level Integrated Circuit (FPSLIC) combining an Atmel AT40K SRAM-based FPGA with an embedded AVR 8-bit RISC microcontroller. It features 5,000 FPGA gates, up to 36 Kbytes of dynamically allocated dual-port SRAM, and JTAG ICE support for on-chip debugging. The device operates at 3.0V to 3.6V with a maximum frequency of 33 MHz. Key specifications include a 25 ns propagation delay, 5V I/O tolerance, and a comprehensive peripheral set including two UARTs, timers, and a hardware multiplier.

Feature Summary

• Monolithic FPSLIC architecture integrating 5K-gate AT40K FPGA with high-performance AVR RISC core
• Up to 36 Kbytes of shared dual-port SRAM for flexible program and data allocation
• On-chip JTAG ICE support compliant with IEEE std. 1149.1 for extensive debug capabilities
• Cache Logic capability allowing dynamic partial reconfiguration without data loss

Applications

• Video compression and decompression systems requiring DSP functions
• Adaptive finite impulse response (FIR) filters and fast Fourier transforms (FFT)
• Portable and handheld applications due to low static and dynamic power consumption
• Encryption and convolution algorithms utilizing the hardware multiplier

Procurement Notes

Verify the presence of JTAG ICE support by checking the date code suffix 'J' on the component marking. Confirm the operating voltage range is strictly maintained between 3.0V and 3.6V. Ensure PCB layout supports split power supply requirements for the FPGA and AVR cores as specified in the design guidelines.

Selection Notes

Select this model for designs requiring 5,000 usable FPGA gates and integrated microcontroller functionality. The AT94K05AL variant provides 4 Kbytes dedicated program SRAM and 4 Kbytes dedicated data SRAM, plus configurable memory partitions. Choose this part over larger gate counts if board space and power efficiency are primary constraints.

Part Context

This component belongs to the AT94KAL Series FPSLIC family, which merges Atmel's AT40K FPGA technology with AVR microcontrollers. The series includes variants with 5K, 10K, and 40K gates. The 'AL' suffix denotes the 3.0V-3.6V operating voltage range, while 'J' indicates JTAG ICE support. The device is fabricated using a 0.35µm five-layer metal CMOS process.

Replacement Considerations

Direct replacements within the same package and pinout include other AT94KAL series devices such as the AT94K10AL or AT94K40AL, provided the gate count and memory requirements are met. Verify that the substitute part also carries the 'J' suffix if JTAG ICE functionality is required.