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Description
MICROCHIP AT28C256-15SU EEPROM, Parallel, 256 Kbit, 32K x 8bit, 5 MHz, WSOIC, 28 PinsThe AT28C256 15SU 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 AT28C256-15SU 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 200µA. 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 | 28Pins |
| Memory Size | 256Kbit |
| Product Range | 256Kbit Serial Parallel EEPROMs |
| Memory Case Style | WSOIC |
| 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 | AT28C256-15SU |
| Quantity | Each |
| Technical Data Sheet EN | |
| Product Change Notice EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
As advertised and didn't splinter with gnawing!
Color: 2PC-Bacon-Green, Color: 2PC-Bacon-Green
This toy is definitely made for major dog toy-destroyers! The dog bones are made of a hard nylon/plastic that is very different from the standard dog toy. The toy is rigid, bumpy, and has knobs on both ends to simulate the bone shape. One of the dog toys, out of the box, had an odd black mark along one of the knobs. It did not wipe away and had a thin piece of plastic attached to it. I did cut that away to be safe, as I don't want to risk my dogs choking, even on something small. That, to me, looked like a factory default. Maybe from when it was being molded? It was only on the one, so its very possible that its just mine. Also worth noting that the toys did NOT smell strange or like plastic as many do. That was honestly pretty refreshing.
It does not exaggerate about its durability.
The material of the toy makes it so it cannot bend or break. I honestly think it would mess up my car tires before it would mess up the toy if I ran over it in the yard. That being said, my bigger dog did put teeth marks into it immediately. Like, the second he put it in his mouth. That isn't necessarily a bad thing, since you don't want them to chip a tooth, but it is something to make note of.
The gnaw marks did not splinter, as some durable chews tend to, which is an excellent sign of a long lasting toy. The second any of our toys splinter, we take them away as they can cause a choking hazard.
We have two bulldogs and they both have played with this style of hard toy before. The smaller bully, the old man, was disappointed by my present of the nylon chew. He sat at my feet pretty pathetically until I gave him an ice cube and sent him on his way. He usually enjoys the hard chews, but I think its possible he didn't like the size of this one. Though, it is surprising.
Our larger bulldog, the puppy, loved it immediately. He took it from my hand and ran off with it to gnaw on for probably an hour. Then came back to grab his brother's to gnaw on too!
For the price, I think its worth it, as you get two of them, and the lack of splintering is game changing.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Hana approved, gold star toy
Color: Original Pack, Color: Original Pack
This is, according to Amazon, our 11th set in 3 months. According to Hana, our shiba/chi mix, this toy is immaculate. Crunch score is a 10/10 and the squeak? Don't get her started. High pitched, easy to squeak and protected by just enough crunch and fabric that it actually lasts. In fact, she will tear the toy open before the squeaker gives up. This may seem like a small feat, however most toys last 12-30 minutes before the teefies take the squeaker out of commission. Lambchops last about 15 minutes before the squeaker gives in and fluff decorates the floor. The only reason we buy so many so often is because 1. The teefies do eventually puncture and the moment that happens she guts the poor Claw instantly. And 2. She has about 11 teefies, so the mouth gets kinda icky and due to the crunch, washing these kind of sucks- retains a lot of water and cant dry. So we replace them often even if she doesn't get to the gutting.
10/10. Its her favorite toy. And we've tested a lot of toys.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
These are ADORABLE!
Color: Tropical Pack, Color: Tropical Pack
These are adorable! I got them as a gift for my in-laws pups and when I was taking pics of them my dog now wants them soooo I’m going to order more for her! They are so soft and the details are hilarious! Just be careful because the pawcohol content is pretty high so I’m sure your dog will be feeling it after just one! 🤣🤣🤣🤣🤣
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Reviewed in the United States on December 17, 2025
★★★★★ 5
Great quality
Color: Tropical Pack, Color: Tropical Pack
My dog went absolutely wild for these they crinkle but thy don’t squeak and I went wild for that! She is a stuffy destroyer and she’s had them for 20 minutes now and they are still intact great product I’ll definitely be ordering more toys from you guys
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Reviewed in the United States on December 25, 2025
★★★★★ 5
My dog loves these toys!
Color: Original Pack
My dog is obsessed with these toys! We jokingly say that he’s a “doggie alcoholic” because he seems to not destroy any toys like this. They’re very soft and each of them has a squeaker! He’s a German Shepherd so they’re a little on the small side, but he loves them none-the-less! Wouldn’t recommend for tough chewers if you’re looking for something that lasts, but they’re cute and fun either way! Love the fact that they’re made by a small business as well. Will have to update with a picture in a bit!
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Reviewed in the United States on February 17, 2025