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SN54LS256J — Technical Data Sheet

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— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include BODY WIDTH: 0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN, BODY HEIGHT: 0.185 INCHES MAXIMUM IN, BODY LENGTH: 0.840 INCHES MAXIMUM IN, FEATURES PROVIDED: HERMETICALLY SEALED AND BURN IN AND W/ENABLE AND W/CLEAR AND EXPANDABLE, OUTPUT LOGIC FORM: TRANSISTOR-TRANSISTOR LOGIC, INCLOSURE MATERIAL: CERAMIC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-291-3076, 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
SN54LS256J
NSN: 5331-00-291-3076
FSC: 5331 — O-RING
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
BODY WIDTH0.220 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN
BODY HEIGHT0.185 INCHES MAXIMUM IN
BODY LENGTH0.840 INCHES MAXIMUM IN
FEATURES PROVIDEDHERMETICALLY SEALED AND BURN IN AND W/ENABLE AND W/CLEAR AND EXPANDABLE
OUTPUT LOGIC FORMTRANSISTOR-TRANSISTOR LOGIC
INCLOSURE MATERIALCERAMIC
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 125.0 CELSIUS DEGC
INPUT CIRCUIT PATTERN6 INPUT
INCLOSURE CONFIGURATIONDUAL-IN-LINE
TERMINAL SURFACE TREATMENTSOLDER
NSN5331-00-291-3076
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SN54LS256J MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
OUTSIDE DIAMETER: 3.851 INCHES MINIMUM AND 3.923 INCHES MAXIMUM IN
•
TEMP RATING: -70.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
CENTER HOLE DIAMETER3.594 INCHES MINIMUM AND 3.624 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OUTSIDE DIAMETER3.851 INCHES MINIMUM AND 3.923 INCHES MAXIMUM IN
TEMP RATING-70.0 FAHRENHEIT AND 180.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
J221P239Interchangeable
interchangeable cross-reference
interchangeable
B-631-12505-40Interchangeable
interchangeable cross-reference
interchangeable
5331PL1673263Interchangeable
interchangeable cross-reference
interchangeable
TA15M04HR1Interchangeable
interchangeable cross-reference
interchangeable
30-020Interchangeable
interchangeable cross-reference
interchangeable
30-020-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SN54LS256J?
SN54LS256J is a MICROCIRCUIT,DIGITAL.
What parts can replace SN54LS256J?
There are 31 known substitutes for SN54LS256J: J221P239, B-631-12505-40, 5331PL1673263 and 28 more. Substitute compatibility should be verified for your specific system.
Is SN54LS256J still available?
SN54LS256J is currently cancelled.
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Last verified: September 2026