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DS87C520-ENL
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Dallas Semiconductor

DS87C520-ENL

Microcontroller · TQFP-44 · Microcontroller
Part Status: Obsolete In demand
Data last refreshed Jul 30, 2026
Manufacturer
Dallas Semiconductor
Mfr Part #
DS87C520-ENL
Series
DS87C520
Category
Microcontroller
Datasheet
View datasheet ↗
Availability & Pricing
Unit PriceRequest a Quote
Sourcing channels20
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Product Attributes

Electrical & Parametric
Cpu8051
Data Bus Width8-bit
Max Clock33MHz
Rom Size16KB
Ram Size1KB
Physical & Thermal
Package / CaseTQFP-44
Mounting TypeSurface Mount
SeriesDS87C520
Classification & Lifecycle
CategoryMicrocontroller
TypeMicrocontroller
Part StatusObsolete

High-speed 8051-compatible microcontroller, 16KB ROM, 1KB SRAM, 33MHz, TQFP-44

Availability & Sourcing

20 sources
SourceMfrQtyDate CodeConditionStatus
Live DS 4 NON-ROHS — Live RFQ
Live — 4 — — Live RFQ
Live Dallas Semiconductor Corp 2 0525 — Live RFQ
Live DALLAS 2 9852 — Live RFQ
Live MAXIM 336 — — Live RFQ
Live Analog Devices 12291 — — Live RFQ
Live MAXIM 1000 06+ — Live RFQ
Live MAXIM 345 06+ — Live RFQ
Live MAXIM 286 06+ — Live RFQ
Live Dallas 2 200525 — Live RFQ
Market DS 4 NON-ROHS — Available RFQ
Market DS 4 — — Available RFQ
Market Dallas Semicond 2 0525 — Available RFQ
Market DALLAS 2 9852 — Available RFQ
Market MAXIM 336 — — Available RFQ
Market Analog Devices 12291 — — Available RFQ
Market MAXIM 1000 06+ — Available RFQ
Market MAXIM 345 06+ — Available RFQ
Market MAXIM 286 06+ — Available RFQ
Market Dallas 2 200525 — 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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DS87C520-ENL viewed on the web · Web User
DS87C520-ENL viewed on the web · Web User
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Specifications reviewed & updated · ZDI

Recent search and sourcing activity for DS87C520-ENL.

Engineering FAQ

DS87C520-ENL 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 DS87C520-ENL?
Cpu: 8051; Data Bus Width: 8-bit; Max Clock: 33MHz; Rom Size: 16KB; Ram Size: 1KB.
What package is DS87C520-ENL supplied in?
DS87C520-ENL is supplied in the TQFP-44 package, surface mount.
Can ZDI source DS87C520-ENL 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

DS87C520-ENL 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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