Device identification — what is the EPM7128S? Identify the correct description of the part number “EPM7128S” commonly encountered in digital logic labs and CPLD development kits.

Introduction / Context:
Part-number literacy is crucial when selecting programmable logic for a project or when reading reference designs. The EPM7128S appears in many educational boards and older industrial designs and belongs to a well-known CPLD family from Altera (now Intel PSG).

Given Data / Assumptions:

• The identifier begins with “EPM,” which typically denotes Altera MAX-series CPLDs.
• “7128” suggests approximately 128 macrocells or a comparable density class within the family.
• “S” denotes the MAX7000S variant with in-system programmability improvements and other features.

Concept / Approach:
Altera’s MAX7000/7000S families are non-volatile CPLDs popular for deterministic timing, instant-on behavior, and ease of use. The EPM7128S sits squarely in this family and is recognized by toolchains such as MAX+Plus II and Quartus for classic flows. It is not a development board (UP2) or a generic educational SoC; it is the CPLD device itself.

Step-by-Step Solution:

Verification / Alternative check:
Legacy datasheets and lab manuals list EPM7128S as a MAX7000S family CPLD used on training boards.

Why Other Options Are Wrong:

• UP2 is a development board that may include programmable logic, not the CPLD part name itself.
• DeVry eSOC / BSR PL DT-2 are not standard part-number identifications for this device.

Common Pitfalls:
Confusing a board SKU with the actual programmable logic device part number on the board.

Final Answer:
An Altera MAX7000S CPLD