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Description
MICROCHIP AT28C256F-15JU EEPROM, Parallel, 256 Kbit, 32K x 8bit, 5 MHz, PLCC, 32 PinsThe AT28C256F 15JU is a 256k high performance Electrically Erasable and Programmable Read Only Memory (EEPROM) organized as 32768 words by 8 bit. Manufactured with Atmels advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440mW. When the device is deselected, the CMOS standby current is less than 200A. The AT28C256 is accessed like a static RAM for the read or write cycle without the need for
The AT28C256F-15JU is a 256k high-performance Electrically Erasable and Programmable Read-Only Memory (EEPROM) organized as 32768 words by 8-bit. Manufactured with Atmels advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440mW. When the device is deselected, the CMOS standby current is less than 200�A. The AT28C256 is accessed like a static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writing of up to 64-byte simultaneously. During a write cycle, the addresses and 1 to 64-byte of data are internally latched, freeing the address and data bus for other operations. Following the initiation of a write cycle, the device will automatically write the latched data using an internal control timer. The end of a write cycle can be detected by DATA Polling of I/O7. Once the end of a write cycle has been detected a new access for a read or write can begin.
- Fast read access time - 150ns
- Automatic page write operation
- Internal control timer
- Fast write cycle times
- Low power dissipation
- Hardware and software data protection
- Data polling for end of write detection
- High reliability CMOS technology
- Endurance - 10? or 10? cycles
- Data retention - 10 years
- CMOS and TTL Compatible inputs and outputs
- JEDEC Approved byte-wide pinout
- Green product and no Sb/Br
Applications
Computers & Computer Peripherals, Industrial, Aerospace, Defence, Military
Product details
| Operating Temperature Min | -40�C |
| Operating Temperature Max | 85�C |
| Clock Frequency | 5MHz |
| No. of Pins | 32Pins |
| Memory Size | 256Kbit |
| Product Range | 256Kbit Serial Parallel EEPROMs |
| Memory Case Style | PLCC |
| Supply Voltage Min | 4.5V |
| IC Interface Type | Parallel |
| EEPROM Memory Configuration | 32K x 8bit |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| MSL | MSL 3 - 168 hours |
Other details
| Brand | MICROCHIP |
| Part Number | AT28C256F-15JU |
| Quantity | Each |
| Technical Data Sheet EN |
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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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- To process your return/exchange, please contact us at [email protected]
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4.2 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Wow!!!
Size: King
I couldn’t be happier with this mattress cover—it completely transformed my sleep.
I had one of the best nights of sleep I’ve had in a long time—no tossing and turning, just pure comfort. It stays in place nicely and feels high-quality and well-made. Fluffy without the bulk.
If you’re looking to upgrade your sleep without buying a whole new mattress, this is absolutely worth it. Highly recommend!
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Best sleep matress topper
Size: Queen
Ordered after running out of options to get a good night's rest. Placed Q sized mattress topper on a tempur pedic matress and 1st night slept like a baby on a cloud. Ever since then I have knocked out after sleeping and moved less at night. Restful sleep has blessed out house again. It feels like a hotel comfy mattress. Totally recommend.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
It’s like a nice hug.
Size: Queen
I find this mattress pad very comfortable to sleep on. I originally bought it because my mattress was too hard. The mattress pad solved the problem. It’s nicely quilted making it very cushy. I’m very happy with it.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Fixed my aches, real improvement in sleep
Size: Queen
It actually does make my bed feel better.
I was skeptical, but decided to try it because our mattress isnt very old but I wake up with aches in my hips/lower back. When I got it, I thought no way this works. But it does.
It goes in like a fitted sheet, super easy to put on. And I honestly havent woken up with hip or lower back aches since using it. Had it on our bed for about 2 months now.
I read some people say they sleep hotter with it, but I havent noticed that at all. Temperature feels the same as without it.
So glad I tried this before spending money on a mew mattress!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Best Mattress Pad!
Size: Queen
This is the best mattress pad you are going to find anywhere and the price is actually a bargain compared to all the other mattress pads I saw in the stores or online. Thought I needed a new mattress but all I needed was this comfy cover.
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Reviewed in the United States on April 26, 2026