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SN74LS40N — DIP-14/16 package (representative)
DIP-14/16
Representative of package type
Texas Instruments Inc

SN74LS40N

NAND Gate · PDIP-14 · Logic
Part Status: Obsolete In demand
Data last refreshed Jul 28, 2026
Manufacturer
Texas Instruments Inc
Mfr Part #
SN74LS40N
Series
74LS
Category
NAND Gate
Datasheet
View datasheet ↗
Availability & Pricing
Unit PriceRequest a Quote
Sourcing channels11
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Product Attributes

Electrical & Parametric
Logic Family74LS
Supply Voltage4.75 V ~ 5.25 V
Physical & Thermal
Package / CasePDIP-14
Mounting TypeThrough Hole
Series74LS
Operating Temperature0°C ~ 70°C
Classification & Lifecycle
CategoryNAND Gate
TypeLogic
Part StatusObsolete

Dual 4-input positive-NAND gates, TTL LS family

Availability & Sourcing

11 sources
SourceMfrQtyDate CodeConditionStatus
Market MOTOROLA 12940 — — Available RFQ
Market — 1028 — — Available RFQ
Market TI 905 74+ — Available RFQ
Market MOT 643 86+ — Available RFQ
Market TI 275 81 — Available RFQ
Market TI 182 — — Available RFQ
Market MOTOROLA 75 — — Available RFQ
Market MOTOROLA 29 77/35 — Available RFQ
Market MOTOROLA TI 27 7401 773 — Available RFQ
Market TI 26 76+ — Available RFQ
Market Motorola Corp 16 7733 — Available RFQ

ZDI Stock — in our warehouse · Market — offers available through our sourcing network · Live — recent offers from our sourcing network.

Part Activity

recent searches, RFQs & offers
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SN74LS40N viewed on the web · Web User
SN74LS40N viewed on the web · Web User
SN74LS40N viewed on the web · Web User

Recent search and sourcing activity for SN74LS40N.

Engineering FAQ

SN74LS40N is marked Obsolete — how does ZDI assure authenticity?
Obsolete and end-of-life parts carry elevated counterfeit risk, which is exactly why ZDI routes every lot through the full EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with source-country supplier vetting and full lot traceability before release.
What are the key specifications of SN74LS40N?
Logic Family: 74LS; Supply Voltage: 4.75 V ~ 5.25 V.
What package is SN74LS40N supplied in?
SN74LS40N is supplied in the PDIP-14 package, through hole, rated 0°C ~ 70°C.
Can ZDI source SN74LS40N beyond the quantities shown?
Yes — ZD Integrated Circuits specializes in sourcing hard-to-find, obsolete, and excess electronic components through its global network, with counterfeit-avoidance inspection on every lot. Submit an RFQ with your target quantity for availability and pricing.

Documents & Media

Quality & Counterfeit Avoidance

ISO 9001 ERAI Member ESD Certified GIDEP Participant ZDI EQuality Process CAGE Code 1V8K2

ZD Integrated Circuits operates an ISO 9001-certified quality system incorporating JEDEC-standard process-control elements. In an era of global sourcing and internet procurement, standards compliance alone no longer assures component authenticity — so ZDI pioneered a multi-layered counterfeit-avoidance program: supplier analysis at the source-country level, detailed component analysis, defined inspection standards for all incoming devices, and stringent supplier rating and review. These programs let ZDI guarantee the integrity and the source of every component it ships.

Every lot moves through ZDI's EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with Quality-Manager disposition before release. Nonconforming material is quarantined; conforming material is warehoused or shipped.

✓Multi-stage EQuality Process™ inspection (QI-1 · QI-2/camera · QI-3)
✓Source-country supplier analysis, rating & review
✓Incoming inspection, RoHS verification, bake, full lot traceability
✓ESD-controlled handling · authentic parts guaranteed

SN74LS40N is marked Obsolete. Obsolete and end-of-life parts carry elevated counterfeit risk — exactly why ZDI routes them through the full EQuality Process™ with source-country supplier vetting, inspection, and traceability.

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