AT94S40AL-25BQI

Overview

The AT94S40AL-25BQI is a Secure Field Programmable System Level Integrated Circuit (FPSLIC) combining an AT40K SRAM-based FPGA, an AVR microcontroller core, and 1 Mbit of secure configuration EEPROM. It features 40,000 usable gates, up to 36 Kbytes of dynamically allocated SRAM, and a hardware multiplier. The device operates at 3.0V to 3.6V with 5V tolerant I/O and supports In-System Programming (ISP). Key interfaces include JTAG for debugging and two serial UARTs.

Feature Summary

• Integrated AT40K FPGA with 40,000 gates and distributed SRAM
• Embedded high-performance AVR RISC microcontroller core
• 1 Mbit secure configuration EEPROM with ISP capability
• JTAG (IEEE Std. 1149.1) interface for on-chip debugging

Applications

• Portable and handheld applications requiring low power consumption
• DSP-based systems utilizing the hardware multiplier
• Secure embedded control systems with in-system programming needs

Procurement Notes

Verify package type LQFP-144 and operating voltage range 3.0V-3.6V against system requirements. Confirm temperature grade compatibility for industrial or commercial environments. Ensure design accounts for 5V tolerant I/O specifications if interfacing with higher voltage logic.

Selection Notes

Select this model for designs requiring 40,000 FPGA gates and significant on-chip memory. Compare gate counts and SRAM sizes against AT94S05AL and AT94S10AL variants if resource requirements are lower. Verify that the LQFP-144 package fits the PCB layout constraints.

Part Context

This component belongs to the AT94S Secure FPSLIC family, which integrates Atmel's AT40K FPGA technology with AVR microcontrollers. It serves as a multi-chip module solution designed to reduce board space and simplify system design by combining programmable logic and processing on a single die.

Replacement Considerations

Compatible alternatives within the same family include AT94S05AL and AT94S10AL, offering lower gate counts (5K and 10K respectively) but similar architectural features. Ensure pinout and package compatibility when substituting.