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639855-02 — MICROCIRCUIT,MEMORY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

639855-02: MICROCIRCUIT,MEMORY.

The MICROCIRCUIT,MEMORY is a the manufacturer memory module engineered for enterprise server and workstation platforms requiring validated, high-reliability memory. Key specifications include special_features: ALTERED ITEM PROGRAMMED USING GENERIC PART 636725-03, features_provided: ELECTROSTATIC SENSITIVE, memory_device_type: PROM, end_item_identification: PACER DAWN, criticality_code_justification: CBBL, part_name_assigned_by_controlling_agency: MICROCIRCUIT,DIGITAL,2K X 8 PRODUCTION IOP MICROCODE MSH PROM. This part is cataloged in the U.S.

Government catalog under NSN 5962-01-421-0888, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
639855-02
NSN: 5962-01-421-0888
FSC: 5962 — Microcircuits, Electronic
CAGE: 07690 — BAE SYSTEMS CONTROLS INC (USA)
SPECIFICATIONS
special_featuresALTERED ITEM PROGRAMMED USING GENERIC PART 636725-03
features_providedELECTROSTATIC SENSITIVE
memory_device_typePROM
end_item_identificationPACER DAWN
criticality_code_justificationCBBL
part_name_assigned_by_controlling_agencyMICROCIRCUIT,DIGITAL,2K X 8 PRODUCTION IOP MICROCODE MSH PROM
NSN5962-01-421-0888
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MICROCIRCUIT,MEMORY TITLE COMPONENT PN 639855-02 MFR MICROCIRCUIT,MEMORY
KEY FEATURES
•
CRITICALITY CODE JUSTIFICATION: CBBL
•
FEATURES PROVIDED: ELECTROSTATIC SENSITIVE
•
MEMORY DEVICE TYPE: PROM
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONCBBL
FEATURES PROVIDEDELECTROSTATIC SENSITIVE
MEMORY DEVICE TYPEPROM
SPECIAL FEATURESALTERED ITEM PROGRAMMED USING GENERIC PART 636725-03
PART NAME ASSIGNED BY CONTROLLING AGENCYMICROCIRCUIT,DIGITAL,2K X 8 PRODUCTION IOP MICROCODE MSH PROM
END ITEM IDENTIFICATIONPACER DAWN
OTHER ITEMS IN FSC 5962 — Microcircuits, Electronic
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5962-00-001-1861 5962-00-001-1901 5962-00-001-1902 5962-00-001-1905 5962-00-001-1906 5962-00-001-1907 5962-00-001-1908 5962-00-001-1909
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 639855-02?
639855-02 is a MICROCIRCUIT,MEMORY.
What is the NSN for 639855-02?
639855-02 is cataloged in the U.S. Government catalog under NSN 5962-01-421-0888. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.