MAX7000S EPM7128S package pin count: An Altera EPM7128S device packaged in a PQFP with the stated I/O breakout (12 I/O per LAB plus 4 additional input-only pins) results in a total of how many package pins?

Difficulty: Easy

Correct Answer: 100-pin

Explanation:


Introduction / Context:
EPM7128S belongs to Altera’s MAX7000S CPLD family. When selecting a device, designers must match I/O requirements to package options. The problem references a specific breakout pattern that totals to a well-known package size for this part.



Given Data / Assumptions:

  • EPM7128S = MAX7000S family CPLD.
  • The package is described as PQFP (plastic quad flat pack).
  • Stated I/O mapping yields a total pin count commonly associated with a 100-pin package option.


Concept / Approach:
The question provides enough hints to identify the package size. MAX7000S devices, including EPM7128S, were widely available in 100-pin PQFP configurations suitable for mid-range I/O counts while maintaining manageable PCB footprint and pitch.



Step-by-Step Solution:

Recognize the device family and typical packages offered.Relate the stated I/O breakout to common pin-count options.Select the standard option that matches: 100-pin PQFP.Confirm that this aligns with catalog listings for EPM7128S.


Verification / Alternative check:
Historic datasheets and distributor listings show EPM7128S availability in a 100-pin PQFP among other packages, validating the total pin count.



Why Other Options Are Wrong:

120-pin / 140-pin / 160-pin: Larger packages offered on other families/parts but not the one implied by the stated breakout.


Common Pitfalls:
Assuming pin count scales directly with macrocell count across families; overlooking vendor-specific package availability.


Final Answer:
100-pin

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