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PartsTable / COMPONENT / WS57C291B-45TMB
WS57C291B-45TMB ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

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: 0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, body_height: 0.185 INCHES MAXIMUM IN, body_length: 1.280 INCHES MAXIMUM IN, special_features: 2K X 8UV ERASABLE PROM, features_provided: BURN IN AND ELECTROSTATIC SENSITIVE AND MONOLITHIC AND PROGRAMMED AND ULTRAVIOLET ERASABLE, output_logic_form: COMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5962-01-354-4135, 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
WS57C291B-45TMB
NSN: 5962-01-354-4135
FSC: 5962
CAGE: 66579 — WAFERSCALE INTEGRATION INC (USA)
SPECIFICATIONS
body_width0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
body_height0.185 INCHES MAXIMUM IN
body_length1.280 INCHES MAXIMUM IN
special_features2K X 8UV ERASABLE PROM
features_providedBURN IN AND ELECTROSTATIC SENSITIVE AND MONOLITHIC AND PROGRAMMED AND ULTRAVIOLET ERASABLE
output_logic_formCOMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC
inclosure_materialCERAMIC
memory_device_typeEPROM
storage_temp_range-65.0 TO 150.0 CELSIUS DEGC
test_data_document96906-MIL-STD-883 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
operating_temp_range-55.0 TO 150.0 CELSIUS DEGC
input_circuit_pattern13 INPUT
NSN5962-01-354-4135
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available MICROCIRCUIT,MEMORY TITLE COMPONENT PN WS57C291B-45TMB MFR MICROCIRCUIT,MEMORY
KEY FEATURES
•
INCLOSURE MATERIAL: CERAMIC
•
MAXIMUM POWER DISSIPATION RATING: 550.0 MILLIWATTS
•
FEATURES PROVIDED: BURN IN AND ELECTROSTATIC SENSITIVE AND MONOLITHIC AND PROGRAMMED AND ULTRAVIOLET ERASABLE
•
TEST DATA DOCUMENT: 96906-MIL-STD-883 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
•
VOLTAGE RATING AND TYPE PER CHARACTERISTIC: -0.6 VOLTS MINIMUM POWER SOURCE AND 7.0 VOLTS MAXIMUM POWER SOURCE
•
MEMORY DEVICE TYPE: EPROM
•
TIME RATING PER CHACTERISTIC: 45.00 NANOSECONDS MAXIMUM ACCESS NS
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 (FLIS)
INCLOSURE MATERIALCERAMIC
MAXIMUM POWER DISSIPATION RATING550.0 MILLIWATTS
FEATURES PROVIDEDBURN IN AND ELECTROSTATIC SENSITIVE AND MONOLITHIC AND PROGRAMMED AND ULTRAVIOLET ERASABLE
TEST DATA DOCUMENT96906-MIL-STD-883 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
VOLTAGE RATING AND TYPE PER CHARACTERISTIC-0.6 VOLTS MINIMUM POWER SOURCE AND 7.0 VOLTS MAXIMUM POWER SOURCE
SPECIAL FEATURES2K X 8UV ERASABLE PROM
MEMORY DEVICE TYPEEPROM
TIME RATING PER CHACTERISTIC45.00 NANOSECONDS MAXIMUM ACCESS NS
TERMINAL SURFACE TREATMENTSOLDER
TERMINAL TYPE AND QUANTITY24 PRINTED CIRCUIT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
5962-87650Interchangeable
interchangeable cross-reference
interchangeable
5962-87650033BXInterchangeable
interchangeable cross-reference
interchangeable
5962-87650033AInterchangeable
interchangeable cross-reference
interchangeable
1335606G1Interchangeable
interchangeable cross-reference
interchangeable
5962-8765004LAInterchangeable
interchangeable cross-reference
interchangeable
CY7C291-50TMBInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WS57C291B-45TMB?
WS57C291B-45TMB is a MICROCIRCUIT,MEMORY.
What parts can replace WS57C291B-45TMB?
There are 17 known substitutes for WS57C291B-45TMB: 5962-87650, 5962-87650033BX, 5962-87650033A and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WS57C291B-45TMB?
WS57C291B-45TMB is cataloged in the Federal Logistics Information System (FLIS) under NSN 5962-01-354-4135. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026