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AT89LS51-16A1 — TQFP/LQFP-32/44 package (representative)
TQFP/LQFP-32/44
Representative of package type
Atmel

AT89LS51-16A1

Microcontroller · TQFP-44 · Microcontroller
Part Status: Obsolete
Data last refreshed Jul 28, 2026
Manufacturer
Atmel
Mfr Part #
AT89LS51-16A1
Series
AT89LS51
Category
Microcontroller
Datasheet
View datasheet ↗
Availability & Pricing
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Product Attributes

Electrical & Parametric
Core8051
Program Memory4 KB Flash
Data Ram128 B
Max Clock16 MHz
Supply2.7-6 V
Physical & Thermal
Package / CaseTQFP-44
Mounting TypeSurface Mount
SeriesAT89LS51
Operating Temperature-40°C ~ 85°C
Classification & Lifecycle
CategoryMicrocontroller
TypeMicrocontroller
Part StatusObsolete

8-bit 8051 MCU, 4KB Flash, 128B RAM, 32 I/O, UART, 16 MHz

Part Activity

recent searches, RFQs & offers
AT89LS51-16A1 viewed on the web · Web User
AT89LS51-16A1 viewed on the web · Web User
AT89LS51-16A1 viewed on the web · Web User
AT89LS51-16A1 viewed on the web · Web User
AT89LS51-16A1 viewed on the web · Web User
AT89LS51-16A1 viewed on the web · Web User
Specifications reviewed & updated · ZDI

Recent search and sourcing activity for AT89LS51-16A1.

Engineering FAQ

AT89LS51-16A1 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 AT89LS51-16A1?
Core: 8051; Program Memory: 4 KB Flash; Data Ram: 128 B; Max Clock: 16 MHz; Supply: 2.7-6 V.
What package is AT89LS51-16A1 supplied in?
AT89LS51-16A1 is supplied in the TQFP-44 package, surface mount, rated -40°C ~ 85°C.
Can ZDI source AT89LS51-16A1 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

AT89LS51-16A1 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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