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SN74AS646NT — DIP-24/28/40 package (representative)
DIP-24/28/40
Representative of package type
Texas Instruments Inc

SN74AS646NT

Registered Bus Transceiver · PDIP-24 · Logic
Part Status: Obsolete
Data last refreshed Jul 28, 2026
Manufacturer
Texas Instruments Inc
Mfr Part #
SN74AS646NT
Series
74AS
Category
Registered Bus Transceiver
Datasheet
View datasheet ↗
Availability & Pricing
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Product Attributes

Electrical & Parametric
Vcc4.5V ~ 5.5V
I Ol48mA
I Oh-15mA
Physical & Thermal
Package / CasePDIP-24
Mounting TypeThrough Hole
Series74AS
Operating Temperature0°C ~ 70°C
Classification & Lifecycle
CategoryRegistered Bus Transceiver
TypeLogic
Part StatusObsolete

Octal bus transceiver/register, 3-state outputs, TTL

Part Activity

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Recent search and sourcing activity for SN74AS646NT.

Engineering FAQ

SN74AS646NT 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 SN74AS646NT?
Vcc: 4.5V ~ 5.5V; I Ol: 48mA; I Oh: -15mA.
What package is SN74AS646NT supplied in?
SN74AS646NT is supplied in the PDIP-24 package, through hole, rated 0°C ~ 70°C.
Can ZDI source SN74AS646NT 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

SN74AS646NT 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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