Status: | Active |
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Series: | AT28HC256 |
RoHS: | Compliant |
The Microchip AT28HC256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 70ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 5mA. Accessed like static RAM for the read or write cycle without external components, it contains a 64-byte page register to allow writing of up to 64 bytes simultaneously. Features an internal Error Correction Circuit for extended endurance and improved data retention, in Military version. Optional Software Data Protection mechanism guards against inadvertent writes; and an extra 64 bytes of EEPROM enables device identification or tracking.
The AT28HC256 is also available DUAL MARKED where applicable with the appropriate Standard Military Drawing Number - 5962-886340xxx. See the datasheet for exact MIL product availability.
32 Kbits x 8 (256 Kbit) |
5V ± 10% Supply |
Parallel Interface |
AT28HC256E - High Endurance 100K Write Cycles Option |
AT28HC256F - 3 ms Fast Write Option |
70ns access time |
Self-Timed Erase and Write Cycles (10 ms max) |
Page Write and Byte Write |
Data Polling for end of write detection |
Low Power Consumption |
Read / Write current 80 mA (Max) |
Standby current TTL 3 mA (Max), CMOS 300 µA (Max) |
Write-Protection |
Hardware Protection |
Software Data Protect |
Data retention > 10 years |
Temperature Ranges |
Standard Temperature Range: -40°C to 85°C |
Military Temperature Range: -55°C to 125°C |
Available in Green (Pb/Halide-free) Packaging |
32-lead, Plastic J-leaded Chip Carrier (PLCC) |
28-lead, 0.300" Wide, Plastic Gull Wing Small Outline (SOIC) |
28-lead, Plastic Thin Small Outline Package (TSOP) |
Available in Dual marked (5962-886340xxx) CERAMIC Hermetic Packaging |
28-Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline (Cerdip) |
28-Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack) |
32-Pad, Non-windowed, Ceramic, Leadless Chip Carrier (LCC) |
Density (Organization) | 256Kb |
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Operating Voltage Min. (V) | 4.5 |
Oper Voltage Max (V) | 5.5 |
Read Access Speed (Par Flash) | 70/90/120ns |
Page Size (bytes) | 0 |
Write Protected | False |
Endurance | 10k Cycles |
Data Retention (Years) | 10 |
Battery Backup | False |
Pins | Packaging | 32 | PLCC |
Temp Range | -40C to +85C |
Packing Media | Tube (32) |
Data Sheets |
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AT28HC256 Industrial Grade 256-Kbit (32,768 x 8) High-Speed Parallel EEPROM |
AT28HC256 - Military Grade 256-Kbit (32,768 x 8) High-Speed Parallel EEPROM |
Application Notes |
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AN_3317 - Support for Third Party Memory Devices Programmer Sources |
AN_0543 - EEPROM Data Protection |
AN_0545 - Programmer Support for Parallel EEPROMs |
AN_0544 - Software Chip Erase |
Miscellaneous |
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Standard Microcircuit Drawings Product Offering |
Supporting Collateral |
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Parallel EEPROM Die Products |
JEDEC Indicator | e3 |
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ROHS | Compliant |
China EFUP | Compliant |
Device Weight (g) | 1.129 |
Shipping Weight (kg) | 2.333333 |
Lead Count | 32 |
Package Type | PLCC |
Package Width or Size | 11.5x14x3.37mm |
Soldering Composition | Matte Tin |
70NS, PLCC, IND TEMP, GREEN | Microchip Technology |
70Ns, Plcc, Ind Temp, Green Rohs Compliant: Yes |Microchip AT28HC256-70JU | Newark Electronics |
EEPROM Parallel 256K-bit 32K x 8 5V 32-Pin PLCC | Avnet America |
Where can I find additional details, specifications and documents for a AT28HC256-70JU?
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Is the AT28HC256-70JU RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by Microchip Technology.
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