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Technical Data Sheet
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MM74HC221AM — MM74HC221AM

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

MM74HC221AM: MM74HC221AM.

The MM74HC221AM is a NATIONAL SEMICONDUCTOR CORPORATION industrial component. This part is cataloged in the U.S. Government catalog under NSN 5962-01-453-8144, 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
MM74HC221AM
NSN: 5962-01-453-8144
FSC: 5962 — Microcircuits, Electronic
CAGE: 27014 — NATIONAL SEMICONDUCTOR CORPORATION (USA)
SPECIFICATIONS
Part NumberMM74HC221AM
ManufacturerNATIONAL SEMICONDUCTOR CORPORATION
NSN5962-01-453-8144
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: NATIONAL SEMICONDUCTOR CORPORATION MM74HC221AM TITLE COMPONENT PN MM74HC221AM MFR NATIONAL SEMICONDUCTOR CORPORATION MM74HC221AM
KEY FEATURES
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INCLOSURE MATERIAL: PLASTIC
•
DESIGN FUNCTION AND QUANTITY: 2 MULTIVIBRATOR, MONOSTABLE
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FEATURES PROVIDED: SCHOTTKY
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INCLOSURE CONFIGURATION: DUAL-IN-LINE
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OUTPUT LOGIC FORM: COMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC
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VOLTAGE RATING AND TYPE PER CHARACTERISTIC: 4.0 VOLTS MAXIMUM INPUT
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OPERATING TEMP RANGE: -40.0 TO 85.0 CELSIUS DEGC
TECHNICAL CHARACTERISTICS
INCLOSURE MATERIALPLASTIC
DESIGN FUNCTION AND QUANTITY2 MULTIVIBRATOR, MONOSTABLE
FEATURES PROVIDEDSCHOTTKY
INCLOSURE CONFIGURATIONDUAL-IN-LINE
OUTPUT LOGIC FORMCOMPLEMENTARY-METAL OXIDE-SEMICONDUCTOR LOGIC
VOLTAGE RATING AND TYPE PER CHARACTERISTIC4.0 VOLTS MAXIMUM INPUT
OPERATING TEMP RANGE-40.0 TO 85.0 CELSIUS DEGC
PART NAME ASSIGNED BY CONTROLLING AGENCYDUAL NON-TRIGGERABLE MONOSTABLE MULTIVIBRATOR
TERMINAL TYPE AND QUANTITY16 PRINTED CIRCUIT
SUBSTITUTES & CROSS-REFERENCES 1
MM74HC221AMXReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is MM74HC221AM?
MM74HC221AM is a MM74HC221AM manufactured by NATIONAL SEMICONDUCTOR CORPORATION.
What parts can replace MM74HC221AM?
There is 1 known substitute for MM74HC221AM: MM74HC221AMX. Substitute compatibility should be verified for your specific system.
What is the NSN for MM74HC221AM?
MM74HC221AM is cataloged in the U.S. Government catalog under NSN 5962-01-453-8144. 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.