ATV2500BL-20JI

Complex Programmable Logic Devices Overview

The ATV2500BL-20JI is a high-density, UV-erasable programmable logic device (PLD) manufactured by Atmel (Microchip Technology). It features a fully connected logic array with 416 product terms and 24 flexible macrocells containing 48 flip-flops. The device operates at a maximum frequency of 40 MHz with a typical pin-to-pin delay of 20 ns. It utilizes a 5V power supply and offers low standby current of 2 mA in the 'L' variant. The component is housed in a 44-lead Plastic J-leaded Chip Carrier (PLCC) package and supports industrial temperature ranges from -40°C to +85°C.

Complex Programmable Logic Devices Feature Summary

• High-performance UV EPROM process with 7 ns typical pin-to-pin delay for faster variants; 20 ns delay for this specific grade.
• Flexible macrocell architecture allowing individual D- or T-type flip-flop configuration and selectable clocking sources.
• Low-power option providing 2 mA standby current, significantly reducing system power consumption compared to standard versions.
• Backward compatible with ATV2500H/L software and JEDEC files, facilitating direct replacement or speed upgrades.

Complex Programmable Logic Devices Applications

• Complex digital logic replacement in industrial control systems requiring reprogrammability.
• State machine implementations utilizing independent clocking for each flip-flop.
• Bi-directional I/O designs leveraging dedicated input paths and feedback terms.
• Prototyping and low-volume production where UV erasure allows design iteration.

Complex Programmable Logic Devices Procurement Notes

Verify the ordering suffix matches the required package and temperature range. The 'J' indicates a 44-lead PLCC package, while 'I' denotes the Industrial temperature range (-40°C to +85°C). Confirm that the design accounts for UV erasure requirements if the device will be exposed to sunlight or fluorescent lighting without an opaque cover. Ensure programming equipment supports the specific voltage levels for preload and observability modes.

Complex Programmable Logic Devices Selection Notes

Select the ATV2500BL-20JI when low standby power is critical, as the 'L' variant draws only 2 mA compared to 110 mA for the standard 'B' version. Choose the 20 ns speed grade if the application requires a maximum external feedback frequency of 40 MHz. Ensure the design utilizes the 44-lead PLCC footprint. Consider the ATV2500BQ variant if a 40-lead package is preferred, noting that pin connections differ for Q versions.

Complex Programmable Logic Devices Part Context

The ATV2500B series represents the highest density PLDs available in 40- or 44-lead packages from Atmel. The ATV2500BL-20JI is part of the low-power subset, designed for applications sensitive to total system power. It shares the same logical structure as the standard ATV2500B but optimizes power consumption through CMOS technology enhancements while maintaining high-speed performance capabilities.

Complex Programmable Logic Devices Replacement Considerations

The ATV2500BL-20JI can replace the ATV2500B-20JI directly if lower power is desired, provided the PCB accommodates the same 44-lead PLCC package. For backward compatibility with older designs using ATV2500H/L, the ATV2500B series can be programmed using ATV2500H/L JEDEC files, acting as a speed upgrade. Note that additional GND connections may be required when emulating H/L functionality.