ISPLSI 1048E-90LQ

Complex Programmable Logic Devices Overview

The ispLSI 1048E-90LQ is a high-density, in-system programmable logic device (PLD) from Lattice Semiconductor. It features 8,000 PLD gates, 288 registers, and 96 universal I/O pins within a 128-pin PQFP package. Built on E²CMOS technology, it operates at a maximum frequency of 90 MHz with a propagation delay of 10 ns. The device supports 5V non-volatile programming, TTL-compatible inputs/outputs, and includes four dedicated clock pins and two global output enable pins for flexible system integration.

Complex Programmable Logic Devices Feature Summary

• High Density: 8,000 PLD gates, 288 registers, and 96 I/O pins.
• Performance: 90 MHz max operating frequency with 10 ns propagation delay.
• In-System Programmability: ISP capability allows reprogramming soldered devices using only 5V power.
• Flexible Architecture: Includes 48 Generic Logic Blocks (GLBs), Global Routing Pool, and programmable output slew rate control.

Complex Programmable Logic Devices Applications

• Complex glue logic replacement
• Address decoding systems
• State machine implementations
• Fast counter designs

Complex Programmable Logic Devices Procurement Notes

Verify the specific speed grade suffix '90' corresponds to the required 90 MHz performance and 10 ns tpd. Confirm the 'LQ' suffix indicates the 128-pin PQFP package type. Ensure the design utilizes the recommended ispLSI 1048EA for new developments if available, as the datasheet notes this preference.

Complex Programmable Logic Devices Selection Notes

Select the -90 speed grade when a 90 MHz maximum operating frequency is sufficient, offering a balance between performance and potentially lower power consumption compared to faster variants. The 128-pin PQFP package is suitable for through-hole or standard surface mount applications requiring extensive I/O connectivity. Verify thermal requirements for the specific logic configuration.

Complex Programmable Logic Devices Part Context

The ispLSI 1048E series serves as a functional superset to the earlier ispLSI 1048 architecture, adding dedicated global output enable pins and additional inputs. It is pin-out compatible with the ispLSI 1048C, facilitating upgrades. The device combines the ease of use of PLDs with the density of FPGAs, utilizing a non-volatile E²CMOS process for instant-on functionality.

Complex Programmable Logic Devices Replacement Considerations

The ispLSI 1048EA is recommended for new designs as a functional equivalent or upgrade path. For legacy replacements, the ispLSI 1048C is pin-out compatible but lacks the enhanced features of the E series. Ensure voltage levels and timing constraints match the target application when substituting.