Device class of FLEX10K: FLEX10K devices (from Altera) are generally classified as which type of programmable logic?

Introduction / Context:
Altera’s FLEX series (including FLEX10K) preceded many of today’s high-density families and provided LUT-based, fine-grained programmable logic. Understanding whether FLEX10K fits the FPGA or CPLD category helps when selecting tools, IP, and design methods.

Given Data / Assumptions:

• FLEX10K devices are LUT/routing fabric based.
• They support large numbers of logic elements compared with SPLDs/CPLDs.
• They are typically configured from external memory (volatile), consistent with FPGA flows.

Concept / Approach:
Key distinctions include granularity (LUT-based vs. product-term), configuration (bitstream vs. fuse/EEPROM product terms), and scale. FLEX10K’s fabric, density, and configuration flow align with the FPGA class rather than the macrocell-centric CPLD class.

Step-by-Step Solution:

Verification / Alternative check:
Historic product briefs and development boards for FLEX10K feature FPGA-oriented flows and IP usage.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing Altera CPLD lines (for example, MAX series) with FPGA lines (for example, FLEX, Stratix, Cyclone).

Final Answer:
FPGAs