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Technical Data Sheet
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74ACT646SC — 74ACT646SC

✓ Government record, cited
NATIONAL SEMICONDUCTOR CORPORATION · COMPONENT
PRODUCT OVERVIEW

74ACT646SC: 74ACT646SC.

The 74ACT646SC is a NATIONAL SEMICONDUCTOR CORPORATION industrial component. This part is cataloged in the U.S. Government catalog under NSN 5962-01-453-7649, 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
74ACT646SC
NSN: 5962-01-453-7649
FSC: 5962 — Microcircuits, Electronic
CAGE: 27014 — NATIONAL SEMICONDUCTOR CORPORATION (USA)
SPECIFICATIONS
Part Number74ACT646SC
ManufacturerNATIONAL SEMICONDUCTOR CORPORATION
NSN5962-01-453-7649
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: NATIONAL SEMICONDUCTOR CORPORATION 74ACT646SC TITLE COMPONENT PN 74ACT646SC MFR NATIONAL SEMICONDUCTOR CORPORATION 74ACT646SC
KEY FEATURES
•
DESIGN FUNCTION AND QUANTITY: 8 REGISTER AND 8 TRANSCEIVER
•
INCLOSURE CONFIGURATION: DUAL-IN-LINE
•
OUTPUT LOGIC FORM: TRANSISTOR-TRANSISTOR LOGIC
•
VOLTAGE RATING AND TYPE PER CHARACTERISTIC: 5.0 VOLTS NOMINAL INPUT
•
OPERATING TEMP RANGE: -40.0 TO 85.0 CELSIUS DEGC
•
TERMINAL TYPE AND QUANTITY: 24 GULLWING
TECHNICAL CHARACTERISTICS
DESIGN FUNCTION AND QUANTITY8 REGISTER AND 8 TRANSCEIVER
INCLOSURE CONFIGURATIONDUAL-IN-LINE
OUTPUT LOGIC FORMTRANSISTOR-TRANSISTOR LOGIC
SPECIAL FEATURESSMALL OUTLINE PACKAGE: QUIET SERIES
VOLTAGE RATING AND TYPE PER CHARACTERISTIC5.0 VOLTS NOMINAL INPUT
OPERATING TEMP RANGE-40.0 TO 85.0 CELSIUS DEGC
END ITEM IDENTIFICATIONKOK-22 E/I FSCM 27014
TERMINAL TYPE AND QUANTITY24 GULLWING
SUBSTITUTES & CROSS-REFERENCES 1
MC74ACT646DWReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 74ACT646SC?
74ACT646SC is a 74ACT646SC manufactured by NATIONAL SEMICONDUCTOR CORPORATION.
What parts can replace 74ACT646SC?
There is 1 known substitute for 74ACT646SC: MC74ACT646DW. Substitute compatibility should be verified for your specific system.
What is the NSN for 74ACT646SC?
74ACT646SC is cataloged in the U.S. Government catalog under NSN 5962-01-453-7649. 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.