What is a cross-reference page for AT28HC256-12JU?
This page groups mapped replacement options for AT28HC256-12JU so buyers and engineers can compare alternatives before requesting a quote or approving a substitute.
Alternative part analysis
AT28HC256-12JU replacements, alternatives, and cross reference
Compare mapped replacement and alternative options for AT28HC256-12JU, then verify package, specifications, and application fit before approval.
Compare AT28HC256-12JU against mapped replacement options
Review package, lifecycle, stock, and MOQ in one view
Move from engineering screening to RFQ without leaving the page
No mapped replacement parts yet
This product currently does not show a published cross-reference list. Use RFQ support if your team needs an alternative part review.
Specification view
Parameter Comparison Chart
A side-by-side view of the source part and its mapped alternatives so buyers and engineers can screen package, availability, lifecycle, and key descriptors before RFQ.
swipe Swipe or scroll horizontally to compare more part numbers
The left column stays visible so buyers can keep the spec label in view while scanning multiple alternatives.
| Parameter Comparison Chart | Current part AT28HC256-12JU Microchip Technology |
|---|---|
| Part Number | AT28HC256-12JU |
| Manufacturer | Microchip Technology |
| Category | Integrated Circuits (ICs) |
| Subcategory | Memory |
| Package | LCC |
| Series | - |
| Key Attributes | - |
| Description | IC EEPROM 256K PARALLEL 32PLCC |
| Lifecycle | - |
| Stock | 21,086 |
| Available | 58,410 |
| Min Order | 1 |
| Datasheet | Available |
| Part Status | Active |
| REACH Status | REACH Unaffected |
| ECCN | EAR99 |
| Lead Free | Lead Free |
| Packaging | Tube |
| Mounting Type | Surface Mount |
| Factory Lead Time | 8 Weeks |
| Published | 1997 |
| Categories | Integrated Circuits (ICs) |
| Supply Voltage | 5V |
| Technology | CMOS |
| Terminal Position | QUAD |
| Peak Reflow Temperature (Cel) | 245 |
| Manufacturer | Microchip Technology |
| Screening Level | MIL-STD-883 |
| Nominal Supply Current | 80mA |
| Output Characteristics | 3-STATE |
| Number of Functions | 1 |
| Operating Supply Voltage | 5V |
| Contact Plating | Tin |
| Radiation Hardening | No |
| Reflow Temperature-Max (s) | 40 |
| Mount | Surface Mount |
| Pbfree Code | yes |
| Terminal Pitch | 1.27mm |
| Length | 13.97mm |
| Memory Type | Non-Volatile |
| Number of Terminations | 32 |
| Number of Pins | 32 |
| Width | 11.43mm |
| Data Polling | YES |
| Memory Interface | Parallel |
| Sub-Categories | Memory |
| Frequency | 5MHz |
| Toggle Bit | YES |
| Operating Temperature | -40°C~85°C TC |
| Memory Width | 8 |
| Memory Format | EEPROM |
| Package / Case | 32-LCC (J-Lead) |
| Write Cycle Time-Max (tWC) | 10ms |
| Write Cycle Time - Word, Page | 10ms |
| Standby Current-Max | 0.0003A |
| Command User Interface | NO |
| Additional Feature | AUTOMATIC WRITE |
| Base Part Number | AT28HC256 |
| Endurance | 10000 Write/Erase Cycles |
| Manufacturer's Part No. | AT28HC256-12JU |
| Density | 256 kb |
| Power Supplies | 5V |
| Voltage - Supply | 4.5V~5.5V |
| Programming Voltage | 5V |
| Access Time | 120ns |
| Memory Size | 256Kb 32K x 8 |
| Page Size | 64words |
| JESD-609 Code | e3 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| HTSUS | 8542.32.0051 |
| Height Seated (Max) | 3.556mm |
| Actions |
Cross-reference FAQ
Replacement Part Questions
Short answers for teams reviewing AT28HC256-12JU replacement and equivalent-part options.
Does a mapped alternative mean a guaranteed drop-in replacement for AT28HC256-12JU?
Not automatically. Cross-reference mapping helps shortlist candidates, but package, electrical behavior, qualification scope, and approval rules still need to be checked before release.
Which parameters should teams compare first for AT28HC256-12JU alternatives?
Start with package, series, key attributes, lifecycle status, stock position, datasheet access, and the mapped pin-to-pin or cross-reference note. Then confirm application-specific requirements in the datasheet and RFQ stage.
Can I request a quote for an alternative to AT28HC256-12JU?
Yes. Use the product links or RFQ actions on this page to request pricing, availability, documentation, and sourcing support for any listed alternative part.
Is AT28HC256-12JU obsolete, and what replacement should buyers review first?
Check the lifecycle row on this page first. If buyers need a fast starting point, the strongest mapped replacement currently surfaced here is , followed by the other alternatives shown in the comparison table.
Engineering support
Need help validating the replacement path?
If your team is unsure whether a mapped alternative to AT28HC256-12JU from Microchip Technology is really usable, contact us for help on package fit, pin compatibility, key parameter gaps, and qualification-facing review questions.
Contact a hardware engineer
Email our engineering support contact at [email protected], or use the contact page if the question should be routed across sourcing, engineering, and support.
developer_board
Package and pin compatibility
Review whether the alternate path looks credible from package, footprint, and pin-level perspectives.
tune
Parameter and function gaps
Surface the electrical, interface, or application-fit questions that still need confirmation before approval.
task_alt
Qualification and approval prep
Organize the documentation, datasheet evidence, and validation checkpoints your internal team may still require.