PartsTable
Technical Data Sheet

FM28C256-250/B — MICROCIRCUIT,MEMORY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

FM28C256-250/B: 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 body_width: 0.404 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN, body_height: 0.098 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, body_length: 0.712 INCHES MINIMUM AND 0.728 INCHES MAXIMUM IN, features_provided: PROGRAMMABLE, output_logic_form: COMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC, inclosure_material: CERAMIC. This part is cataloged in the U.S.

Government catalog under NSN 5962-01-323-6962, 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
FM28C256-250/B
NSN: 5962-01-323-6962
FSC: 5962 — Microcircuits, Electronic
CAGE: 61394 — SEEQ TECHNOLOGY INC (USA)
SPECIFICATIONS
body_width0.404 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
body_height0.098 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
body_length0.712 INCHES MINIMUM AND 0.728 INCHES MAXIMUM IN
features_providedPROGRAMMABLE
output_logic_formCOMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC
inclosure_materialCERAMIC
memory_device_typeEEPROM
operating_temp_range-55.0 TO 125.0 CELSIUS DEGC
inclosure_configurationFLAT PACK
terminal_surface_treatmentSOLDER
terminal_type_and_quantity28 FLAT LEADS
current_rating_per_characteristic80.00 MILLIAMPERES NOMINAL TOTAL SUPPLY
NSN5962-01-323-6962
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MICROCIRCUIT,MEMORY TITLE COMPONENT PN FM28C256-250/B MFR MICROCIRCUIT,MEMORY
KEY FEATURES
•
INCLOSURE MATERIAL: CERAMIC
•
TERMINAL SURFACE TREATMENT: SOLDER
•
BODY WIDTH: 0.404 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
•
BODY HEIGHT: 0.098 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
•
FEATURES PROVIDED: PROGRAMMABLE
•
INCLOSURE CONFIGURATION: FLAT PACK
•
CURRENT RATING PER CHARACTERISTIC: 80.00 MILLIAMPERES NOMINAL TOTAL SUPPLY
•
MEMORY DEVICE TYPE: EEPROM
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
INCLOSURE MATERIALCERAMIC
TERMINAL SURFACE TREATMENTSOLDER
BODY WIDTH0.404 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
BODY HEIGHT0.098 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
FEATURES PROVIDEDPROGRAMMABLE
INCLOSURE CONFIGURATIONFLAT PACK
CURRENT RATING PER CHARACTERISTIC80.00 MILLIAMPERES NOMINAL TOTAL SUPPLY
MEMORY DEVICE TYPEEEPROM
BODY LENGTH0.712 INCHES MINIMUM AND 0.728 INCHES MAXIMUM IN
OUTPUT LOGIC FORMCOMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC
SUBSTITUTES & CROSS-REFERENCES 8
X28C256FMB-25Reference document
Same NSN cross-reference
Reference document — Secondary reference
ROM/PROMReference document
Same NSN cross-reference
Reference document — Secondary reference
5962-88525Reference document
Same NSN cross-reference
Reference document — Identification reference
5962-8852503ZASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FM28C256/B094Reference document
Same NSN cross-reference
Reference document — Secondary reference
AT28C256-25FM/883Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is FM28C256-250/B?
FM28C256-250/B is a MICROCIRCUIT,MEMORY.
What parts can replace FM28C256-250/B?
There are 8 known substitutes for FM28C256-250/B: X28C256FMB-25, ROM/PROM, 5962-88525 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FM28C256-250/B?
FM28C256-250/B is cataloged in the U.S. Government catalog under NSN 5962-01-323-6962. 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.