AT94S40AL-25DGI

Overview

The AT94S40AL-25DGI is a Secure Field Programmable System Level Integrated Circuit (FPSLIC) from Microchip Technology, housed in a 256-pin CABGA package. It integrates an AT40K SRAM-based FPGA with 40,000 usable gates and an embedded AVR 8-bit RISC microcontroller. The device includes 1 Mbit of secure configuration EEPROM memory with security protection and In-System Programming (ISP) capabilities. Operating at a supply voltage of 3.0V to 3.6V, it supports up to 162 maximum FPGA user I/O lines and provides up to 32 Kbytes of dynamically allocated instruction and data SRAM.

Feature Summary

• Integrates 40,000-gate AT40K SRAM-based FPGA with an embedded high-performance AVR 8-bit RISC microcontroller
• Includes 1 Mbit of secure configuration EEPROM memory supporting In-System Programming (ISP)
• Features up to 32 Kbytes of dynamically allocated Instruction and Data SRAM
• Supports JTAG (IEEE Std. 1149.1) interface for extensive on-chip debug support

Applications

• Portable and handheld applications requiring low static and dynamic power consumption
• DSP-based systems utilizing the hardware multiplier and Cache Logic designs
• Secure embedded control systems requiring protected configuration memory

Procurement Notes

Verify the specific ordering suffix 'DG' corresponds to the 256-pin CABGA package and industrial temperature range (-40°C to +85°C) as defined in the manufacturer's part number structure. Confirm that the '25' speed grade meets the timing requirements for the target clock frequency. Ensure compatibility with the required programming tools for ISP and JTAG debugging.

Selection Notes

Select this component when a combined FPGA and microcontroller solution is needed within a single package. The AT94S40AL variant provides 40,000 FPGA gates, suitable for complex logic designs. Consider the 256-pin CABGA package if high I/O density (up to 162 FPGA I/Os) is required. Verify that the system design can accommodate the 3.0V to 3.6V operating voltage range and 5V tolerant I/O requirements.

Part Context

The AT94S40AL-25DGI belongs to the AT94S Secure FPSLIC family, which combines Atmel's AT40K FPGA technology with AVR microcontrollers and AT17 series configuration memories. This multi-chip module (MCM) architecture allows for dynamic reconfiguration and secure booting. The 'AT94S' designation indicates the secure version with protected configuration memory, distinguishing it from the standard AT94K series.

Replacement Considerations

Direct replacements within the same package and pinout include other members of the AT94S40AL family with different speed grades or temperature ranges, such as AT94S40AL-15DGI or AT94S40AL-25DI. For lower gate counts, the AT94S10AL-25DGI offers 10,000 gates in the same package. Cross-family migration to newer Microchip FPSLIC devices may require schematic and software redesign.