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Description
MICROCHIP 25LC640A-E/SN EEPROM, SPI, 64 Kbit, 8K x 8bit, 10 MHz, SOIC, 8 PinsThe 25LC640A E SN is a 64kb SPI Bus Serial EEPROM memory accessed via a simple serial peripheral interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the
The 25LC640A-E/SN is a 64kb SPI Bus Serial EEPROM memory accessed via a simple serial peripheral interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of chip select allowing the host to service higher priority interrupts.
- Low-power CMOS technology
- 8192 x 8-bit organization
- 32-byte page
- Self-timed erase and write cycles (5ms maximum)
- Block write protection - Protect none, 1/4, 1/2 or all of array
- Built-in write protection - Power-on/off data protection circuitry
- Sequential read
- 1000000 erase/write cycles endurance
- >200-year Data retention
- >4000V ESD protection
Applications
Communications & Networking, Automotive
Warnings
ESD sensitive device, take proper precaution while handling the device.
Product details
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 125°C |
| Clock Frequency | 10MHz |
| No. of Pins | 8Pins |
| Memory Size | 64Kbit |
| Product Range | 64Kbit Serial SPI EEPROMs |
| Memory Case Style | SOIC |
| Supply Voltage Min | 2.5V |
| IC Interface Type | SPI |
| EEPROM Memory Configuration | 8K x 8bit |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| MSL | MSL 1 - Unlimited |
Other details
| Brand | MICROCHIP |
| Part Number | 25LC640A-E/SN |
| Quantity | Each |
| Technical Data Sheet EN | |
| Miscellaneous 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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- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.2 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 4
Just Right!
The material is sports wear - light, breezy and silky to the touch.
Pattern/Design came out as expected from the image, no errors and I tend to choose 1 size up so Medium - Large are my go to's.
Fit well with spare room to fill.
Worth the money.
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Reviewed in the United States on October 18, 2023
★★★★★ 5
Well Padded, good zipper compartments
Size: 14 Inch, Style: 1-pack
This is a really basic case but it fits and looks amazingly great. This one fit my 15" laptop without any issues. The padded interior provides a bit of protection. The zipper side pockets are perfect. I use this to visit different campuses and holds just enough for field work. The price is right and compared to the name bags, this is a great bargain for a quality case.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Basic & Great
Size: 17.3 Inch, Style: 1-pack
Heavy duty, spacious, & basic. Great price for a great item.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Great no-frills bag. Slim and compact, but still holds plenty.
Size: 17.3 Inch, Style: 1-pack
I needed a case for my new HP Pavilion 17" laptop.
I didn't need anything fancy or with all kinds of special features. I didn't need one with a lot of extra storage space beyond what was required for the laptop, its power adapter and cord, and a small mouse. And above all I didn't want one with a large, bulky profile, one that would feel like I was carrying--or rolling--a small suitcase.
Turns out this AmazonBasics bag was just what I was looking for.
It is indeed slim and compact, and it's lightweight to boot (only weighing about 1 lb.). And even when it's filled to the brim and weighs a good bit more, it STILL looks slim and compact.
For its economical price point, it is constructed very well, and thus should be quite durable for light to moderate use. The stitching is very tight and clean, with even strong, "zipper-stay" stitching being included on this inexpensive bag. The zippers themselves (which I tend to be picky about) are of very good quality, and open and close without much effort. The zipper pulls are ample in size and weight, and are very strong and sturdy. In other words, they're NOT cheap.
I appreciate the case's simple yet thoughtful design. I especially like the single, large, zippered pocket on the front "face" of the bag, where you can easily and conveniently keep oft-used items such as your phone, keys, power bank, and so forth. Too many laptop bags' outside pockets are unzippered, which I find both impractical and unsafe.
The AmazonBasics bag holds my laptop snugly and securely, yet I can still manage to squeeze in extra padding (about 3/8" thick and 1.5" wide) all around its perimeter. I do this because the case provides only the most minimal of padding throughout. (Mind you, I wouldn't have expected sufficiently thick padding on a bargain bag such as this one, but it's worth bringing attention to nonetheless.) The upshot here is that, as well constructed as this case is, it's not designed to protect our laptops from accidental drops onto hard surfaces. There simply isn't enough shock-absorbing padding.
But frankly I'm not that worried about accidental drops. Rather, for my most pressing general needs--storing or transporting my laptop and keeping it free from dust, scratches, dents and the like--this AmazonBasics bag really fits the bill. It's easy to carry, and it's easy (and quick) to access your laptop.
I'm VERY happy with it, would buy another one without hesitation, and I highly recommend it!
Finally, my goal as a reviewer is always to try and help others make better informed decisions about potential Amazon products they may be considering. Toward that end, I hope in some small way that you may have found this helpful. Thanks for reading my review. Best of luck with your shopping!
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Reviewed in the United States on October 16, 2016
★★★★★ 4
Love this bag.
Size: 15.6 Inch, Style: 1-pack
I love this bag. It was affordable, and it has plenty of compartments to store my cords and portable drives. It is fun to be able to get work done at coffee shops and theme parks etc...
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Reviewed in the United States on May 5, 2026