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STMicroelectronics

M29F040B-120JC

Flash Memory · PLCC-32 · Memory
In stock at ZDI Part Status: Obsolete
Data last refreshed Aug 7, 2026
Manufacturer
STMicroelectronics
Mfr Part #
M29F040B-120JC
Series
M29F040B
Category
Flash Memory
Datasheet
View datasheet ↗
Availability & Pricing
ZDI Stock34 pcs
PackagingBags
Est. market range$2.00 – $8.00
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Cross Reference for M29F040B-120JC

Alliance Memory published cross-reference · M29F040 family

ZD Integrated Circuits is an authorized distributor of Alliance Memory. Alliance Memory publishes the part below as cross-reference for the M29F040 family, which includes M29F040B-120JC. Confirm speed grade, temperature range and package against the datasheet before substituting.

Alliance Memory partFamilyTechnologyDensityOrganizationMatch
AS29CF040-55CCIN AS29CF040-55CCIN Parallel 5V NOR Flash4Mb512K x 8 Family Quote →
Source: Alliance Memory published cross-reference data · alliancememory.com ↗

Product Attributes

Electrical & Parametric
Memory Size4 Mb
Organization512K x 8
Supply Voltage5 V
Access Time120 ns
Physical & Thermal
Package / CasePLCC-32
Mounting TypeSurface Mount
SeriesM29F040B
Operating Temperature0°C ~ 70°C
Classification & Lifecycle
CategoryFlash Memory
TypeMemory
Part StatusObsolete

4 Mbit (512K x 8) 5 V Flash memory, 120 ns access time

Environmental & Export Classifications

RoHS Status
Non-Compliant

Availability & Sourcing

1 source
SourceMfrQtyDate CodeConditionStatus
ZDI Stock STMicroelectronics 34 — New In Stock RFQ

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

Price History & Market Reference

Market Price Range

High$8.00
Low$2.00
Last$5.00
Price as of2026-08-07

ZDI Transaction

ZDI priceQuote on request

Pricing reflects ZDI's transaction and market-reference data. Firm pricing confirmed per RFQ against current availability.

Part Activity

recent searches, RFQs & offers
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Recent search and sourcing activity for M29F040B-120JC.

Engineering FAQ

Is there an Alliance Memory cross-reference for M29F040B-120JC?
Alliance Memory publishes 1 cross-reference for the M29F040 family, which includes M29F040B-120JC: AS29CF040-55CCIN. ZD Integrated Circuits is an authorized distributor of Alliance Memory — confirm speed grade, temperature range and package against the datasheet, then request a quote for pricing and lead time.
M29F040B-120JC 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 quantity and packaging is M29F040B-120JC in ZDI stock?
ZDI holds 34 pcs, packaged as Bags. Request a quote for confirmed quantity, lead time, and pricing.
What are the key specifications of M29F040B-120JC?
Memory Size: 4 Mb; Organization: 512K x 8; Supply Voltage: 5 V; Access Time: 120 ns.
What package is M29F040B-120JC supplied in?
M29F040B-120JC is supplied in the PLCC-32 package, surface mount, rated 0°C ~ 70°C.

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

M29F040B-120JC 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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