GAL20V8B-15QP

Programmable Logic Device Pld Overview

The GAL20V8B-15QP is a discontinued Generic Array Logic (GAL) device from Lattice Semiconductor, utilizing high-performance E2CMOS technology. It features 20 inputs and 8 outputs with reconfigurable Output Logic Macrocells (OLMCs). The part supports registered, complex, and simple modes, emulating various PAL architectures. Key electrical parameters include a maximum propagation delay of 15 ns, a typical operating supply current of 45 mA for the Quarter Power variant, and an industrial temperature range of -40°C to +85°C. The device offers 100 erase/write cycles and over 20 years of data retention.

Programmable Logic Device Pld Feature Summary

• E2CMOS Technology: High-speed electrical erasure (<100ms), 100 erase/write cycles, and >20-year data retention.
• Reconfigurable OLMCs: Supports Registered, Complex, and Simple modes with programmable output polarity and I/O configuration.
• PAL Emulation: Functionally compatible with standard 24-pin PAL devices including 20R8, 20L8, and 16P6 architectures.
• Low Power Options: Available in Low Power (75mA typ) and Quarter Power (45mA typ) variants.

Programmable Logic Device Pld Applications

• DMA Control
• State Machine Control
• High Speed Graphics Processing
• Standard Logic Speed Upgrade

Programmable Logic Device Pld Procurement Notes

This component is officially discontinued per Product Change Notification (PCN) #13-10. No new production units are available from Lattice Semiconductor. Verification of existing inventory or second-source availability requires direct contact with authorized distributors or lifecycle management partners such as Rochester Electronics. Designers must assess long-term supply risks before implementation.

Programmable Logic Device Pld Selection Notes

Select this device only for legacy system maintenance where specific pinout and logic emulation compatibility with older PAL designs is required. For new designs, consider modern CPLD alternatives that offer higher density, improved power efficiency, and active manufacturing status. Ensure compiler software supports the specific GAL20V8 device type mapping for the desired OLMC mode.

Programmable Logic Device Pld Part Context

The GAL20V8 series represents Lattice's entry into the Electrically Erasable Programmable Logic Device market, bridging the gap between mask-programmed PALs and field-programmable gate arrays. The 'B' suffix denotes the Industrial Grade version, while 'Q' indicates the Quarter Power consumption option. This family was pivotal in enabling rapid prototyping and design iterations before the dominance of modern FPGA technologies.

Programmable Logic Device Pld Replacement Considerations

No direct functional substitutes are listed in the official documentation. Designers should evaluate modern Lattice CPLDs or FPGAs that support equivalent logic capacity and I/O counts, ensuring pin-to-pin compatibility if board space is constrained.

Programmable Logic Device Pld FAQ

["What does the 'QP' suffix indicate in the part number?","The 'Q' indicates a Quarter Power variant with a typical supply current of 45 mA, and 'P' denotes a Plastic DIP package."]

["Can the GAL20V8B-15QP be used to emulate a 20R8 PAL?","Yes, when configured in Registered Mode (SYN=0, AC0=1), it provides architecture similar to the 20R8 device."]

["What is the maximum clock frequency for this device?","The maximum clock frequency depends on the feedback configuration; for example, with internal feedback, it is approximately 62.5 MHz for the -15 speed grade."]