800-219-9001 RFQ
74LS645N — DIP-24/28/40 package (representative)
DIP-24/28/40
Representative of package type

74LS645N

Bus Transceiver · DIP-20 · Logic
Part Status: Obsolete In demand
Data last refreshed Jul 22, 2026
Mfr Part #
74LS645N
Series
74LS
Category
Bus Transceiver
Datasheet
View datasheet ↗
Availability & Pricing
Unit PriceRequest a Quote
Sourcing channels12
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Specifications

Physical & Thermal
Package / CaseDIP-20
Mounting TypeThrough Hole
Series74LS
Classification & Lifecycle
CategoryBus Transceiver
TypeLogic
Part StatusObsolete

Octal bus transceiver, non-inverting, 3-state outputs, TTL

Availability & Sourcing

12 sources
SourceMfrQtyDate CodeConditionStatus
Market SIGNETICS 241 8350 862 — Available RFQ
Market SIGNET 196 90+ — Available RFQ
Market SIG 155 — — Available RFQ
Market SIGNETICS 125 86 — Available RFQ
Market SIGNETICS 115 382 — Available RFQ
Market Monolithic Memo 82 8852 — Available RFQ
Market MMI 73 — — Available RFQ
Market SIGNETICS 72 — — Available RFQ
Market SIG 62 89 86 — Available RFQ
Market MOTRL 49 — — Available RFQ
Market SIG 24 86 — Available RFQ
Market SIGNETICS 23 — — 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
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User
74LS645N viewed on the web · Web User

Recent search and sourcing activity for 74LS645N.

Engineering FAQ

74LS645N 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 package is 74LS645N supplied in?
74LS645N is supplied in the DIP-20 package, through hole.
Can ZDI source 74LS645N 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

74LS645N 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.

Related Parts

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