LAMXO640C-3TN144E

Overview

The LAMXO640C-3TN144E is an automotive-grade Field Programmable Gate Array (FPGA) from the LA-MachXO family, qualified to AEC-Q100 standards. It features 640 Look-Up Tables (LUTs), 320 Adaptive Logic Modules (ALMs), and 80 Logic Array Blocks (LABs). The device provides 113 I/Os in a TQFP-144 package. It operates within a voltage range of 1.71 V to 3.465 V and supports frequencies up to 500 MHz. Key architectural elements include 6 kbit distributed RAM, non-volatile configuration for instant-on operation, and TransFR technology for in-field reconfiguration.

Feature Summary

• AEC-Q100 Qualified: Tested and qualified for automotive applications with extended temperature support (-40°C to +125°C).
• Non-Volatile Architecture: Provides instant-on functionality without external configuration memory, ensuring design security.
• TransFR Technology: Enables in-field logic updates while the system remains operational.
• Flexible I/O: Supports multiple interface standards including LVCMOS 3.3/2.5/1.8/1.5/1.2, LVTTL, PCI, LVDS, and LVPECL via sysIO buffers.

Applications

• Glue logic replacement in automotive control systems.
• Bus bridging and interfacing between different protocol domains.
• Power-up control and sequence management.
• Low-capacity FPGA tasks traditionally addressed by CPLDs.

Procurement Notes

Verify the specific suffix 'C' against the manufacturer's current documentation to confirm it denotes the commercial temperature grade variant within the automotive-qualified family. Confirm the '3' speed grade matches the required timing constraints for the target 500 MHz maximum frequency. Ensure the TQFP-144 package availability aligns with current manufacturing status, as lead times may vary based on production cycles.

Selection Notes

Select this component when AEC-Q100 qualification is mandatory for the application environment. The 640 LUT density is suitable for moderate complexity logic designs requiring instant-on capabilities. Consider the 113 I/O count against interface requirements; if more I/Os are needed, larger devices like the LAMXO1200C or LAMXO2280E should be evaluated. Verify that the 1.2V core voltage requirement is compatible with the system power rails.

Part Context

This part belongs to the LA-MachXO Automotive Family, which combines CPLD-like instant-on security with FPGA flexibility. It is designed to replace traditional PLDs in automotive environments. The MachXO series utilizes non-volatile SRAM technology, allowing for infinite reconfiguration and background programming via JTAG, distinguishing it from volatile SRAM FPGAs that require external boot memory.

Replacement Considerations

Direct pin-compatible replacements within the same package are limited due to the specific automotive qualification. For higher density needs, the LAMXO1200C or LAMXO2280E offer increased resources but may require schematic adjustments. Non-automotive equivalents like the LCMXO640C lack the AEC-Q100 certification and must be validated for environmental suitability.