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AT28C256-20PC — DIP-24/28/40 package drawing (representative)
DIP-24/28/40
Representative of package type
Atmel Corp

AT28C256-20PC

Memory · PDIP-28 · Parallel EEPROM
In stock at ZDI Part Status: Active In demand
Data last refreshed Sep 9, 2026
Manufacturer
Atmel Corp
Mfr Part #
AT28C256-20PC
Category
Memory
Datasheet
View datasheet ↗
Availability & Pricing
ZDI Stock8 pcs
Date Code0127/0131
PackagingTubed
ZDI Price$5.00
Last transacted2008-01-14
Market range$5.00 – $7.00
Sourcing channels14
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Live pricing on request · most quotes same business day

Product Attributes

Electrical & Parametric
Memory Size256 Kbit (32768 x 8)
Access Time200 ns
Supply Voltage4.5 V to 5.5 V
Operating Temperature (Commercial)0°C to +70°C
Page Write Size64 bytes
Page Write Cycle Time3 ms or 10 ms max
Active Current50 mA max
Standby Current (Cmos)200 µA max
Endurance10,000 or 100,000 cycles
Data Retention10 years
Data PollingYes
Hardware/Software Data ProtectionYes
Pin Count28
Mounting TypeThrough Hole
Physical & Thermal
Package / CasePDIP-28
Classification & Lifecycle
CategoryMemory
TypeParallel EEPROM
Part StatusActive

256 Kbit (32,768 x 8) Paged Parallel EEPROM

Availability & Sourcing

15 sources
SourceMfrQtyDate CodeConditionStatus
ZDI Stock Atmel Corp 8 0127/0131 New In Stock RFQ
Market Atmel Corp 8 9504 — Available RFQ
Market Atmel Corp 225 — — Available RFQ
Market Atmel Corp 62 0235 — Available RFQ
Market — 46 — — Available RFQ
Market AT 44 + — Available RFQ
Market Atmel Corp 42 9524 — Available RFQ
Market Atmel Corp 38 0035 — Available RFQ
Market Atmel Corp 26 9505 — Available RFQ
Market ATM 20 93 — Available RFQ
Market ALTERA 14 — — Available RFQ
Market Atmel Corp 10 0013' — Available RFQ
Market ATMEL 92+ 10 — — Available RFQ
Market Atmel Corp 9 95 — Available RFQ
Market Atmel Corp 8 0127/013 — Available 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$7.00
Low$5.00
Last$5.00
Price as of2008-01-14

ZDI Transaction

Last ZDI price$5.00
As of2008-01-14
Active offers14

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

Part Activity

recent searches, RFQs & offers
AT28C256-20PC viewed on the web · Web User
AT28C256-20PC viewed on the web · Web User
AT28C256-20PC viewed on the web · Web User
AT28C256-20PC viewed on the web · Web User
AT28C256-20PC viewed on the web · Web User
Part record updated by grok_grounded enrichment — manufacturer, description, category, package, specs, lifecycle, datasheet · ZDI
Specifications reviewed & updated · ZDI
AT28C256-20PC viewed on the web · Web User

Recent search and sourcing activity for AT28C256-20PC.

Engineering FAQ

What quantity and packaging is AT28C256-20PC in ZDI stock?
ZDI holds 8 pcs, packaged as Tubed, date code(s) 0127/0131. Request a quote for confirmed quantity, lead time, and pricing.
What are the key specifications of AT28C256-20PC?
Memory Size: 256 Kbit (32768 x 8); Access Time: 200 ns; Supply Voltage: 4.5 V to 5.5 V; Operating Temperature (Commercial): 0°C to +70°C; Page Write Size: 64 bytes; Page Write Cycle Time: 3 ms or 10 ms max.
What package is AT28C256-20PC supplied in?
AT28C256-20PC is supplied in the PDIP-28 package.
Can ZDI source AT28C256-20PC 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

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