GAL20RA10B-20LP

Programmable Logic Device Pld Overview

The GAL20RA10B-20LP is a Complex Programmable Logic Device (CPLD) belonging to the GAL20Vx series, manufactured by Lattice Semiconductor. It utilizes E2CMOS technology for high-speed operation and non-volatile programmability. The device features a 20-pin package with 10 input/output pins and 8 general-purpose inputs. Key electrical parameters include a maximum propagation delay of 20 ns and an operating voltage range typically spanning 4.5 V to 5.5 V. It supports standard logic functions suitable for replacing discrete TTL/CMOS logic in digital systems.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: Combines the speed of CMOS with the non-vatility of EEPROM, allowing in-system reprogramming without UV erasure.
• High-Speed Performance: Guaranteed 20 ns maximum propagation delay for fast logic switching applications.
• Flexible I/O Architecture: Provides 10 registered or combinational outputs and 8 dedicated inputs within a compact 20-pin DIP or PLCC package.
• Direct TTL/CMOS Compatibility: Designed to interface directly with standard logic families without requiring level shifting.

Programmable Logic Device Pld Applications

• State Machine Implementation: Replacing complex discrete flip-flop and gate networks in control logic.
• Address Decoding: Simplifying memory and I/O address decoding in microprocessor-based systems.
• Bus Arbitration: Managing data flow between multiple components in embedded controllers.
• Logic Replacement: Consolidating multiple small-scale integration (SSI) and medium-scale integration (MSI) chips into a single component.

Programmable Logic Device Pld Procurement Notes

Verify the specific suffix 'LP' against the manufacturer's current datasheet to confirm package type (e.g., Plastic DIP vs. Ceramic PLCC) and temperature grade. As this is a mature legacy component, availability may be limited through primary distributors; authorized surplus partners like Rochester Electronics often supply these parts. Ensure the design accounts for the specific pinout compatibility if substituting older GAL variants.

Programmable Logic Device Pld Selection Notes

Select the GAL20RA10B-20LP when a design requires 10 output lines with registered functionality and 8 inputs. Compare the 20 ns speed grade against system timing requirements; faster variants (e.g., -15) are available if higher performance is needed. Confirm that the power supply voltage matches the 5V standard required by this family. Consider the GAL22V10 if additional inputs are necessary for future expansion.

Programmable Logic Device Pld Part Context

This part belongs to the GAL20Vx family, which succeeded earlier GAL16V8 designs by offering more I/O resources. It is part of Lattice's broader CPLD portfolio, bridging the gap between simple PALs and larger FPGAs. While newer Lattice MachXO or CrossLink families offer greater density, the GAL20Vx series remains relevant for cost-sensitive, low-complexity logic replacement tasks where proven reliability is critical.

Programmable Logic Device Pld Replacement Considerations

Direct pin-to-pin replacements include other GAL20RA10B variants with different speed grades (e.g., GAL20RA10B-15). Generic equivalents from other manufacturers such as AMD/Atmel GAL20V10 may require verification of pinout and electrical characteristics. Always consult the specific datasheet for the substitute to ensure functional equivalence in terms of output configuration and power consumption.