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Description
MICROCHIP 25LC640-I/P EEPROM, SPI, 64 Kbit, 8K x 8bit, 2 MHz, DIP, 8 PinsThe 25LC640 I P is a 64kB serial Electrically Erasable Programmable Read Only Memory (EEPROM) 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
The 25LC640-I/P is a 64kB serial Electrically Erasable Programmable Read-Only Memory (EEPROM) 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
- Write cycle time - 5ms maximum
- Self-timed erase and write cycles
- Block write protection - Protect none, 1/4, 1/2 or all of array
- Built-in write protection
- Power-on/off data protection circuitry
- Write enable latch
- Write-protect pin
- Sequential read
- High reliability
- Data retention - >200 years
- ESD protection - >4000V
Applications
Computers & Computer Peripherals, Industrial, Communications & Networking, Consumer Electronics, Automotive
Product details
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
| Clock Frequency | 2MHz |
| No. of Pins | 8Pins |
| Memory Size | 64Kbit |
| Product Range | 64Kbit Serial SPI EEPROMs |
| Memory Case Style | DIP |
| Supply Voltage Min | 2.5V |
| IC Interface Type | SPI |
| EEPROM Memory Configuration | 8K x 8bit |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| MSL | - |
Other details
| Brand | MICROCHIP |
| Part Number | 25LC640-I/P |
| 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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4.7 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Will buy again!
Configuration: 4-Stroke, Size: 1 GA, Configuration: 4-Stroke, Size: 1 GA
This is my second time using this oil to service my 2022 Mercury 90 outboard. Excellent oil! Engine runs extremely smooth. The jug was very easy to pour from. No smoke from the engine.
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Reviewed in the United States on March 18, 2026
★★★★★ 5
Good
Configuration: 4-Stroke, Size: 1 GA, Case of 3
Good
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Reviewed in the United States on May 15, 2026
★★★★★ 4
Oily situation lol
Configuration: 4-Stroke, Size: 1 GA
Honestly how do you write a review of this product? I would have to run tests for years on multiple oils on various engines to do so. The value was good however and shipping was great
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Reviewed in the United States on March 31, 2025
★★★★★ 5
Use the best oil to protect your investment
Configuration: 4-Stroke, Size: 1 GA
Great product.
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Reviewed in the United States on September 30, 2025
★★★★★ 5
Works well. You need to drill a 3/8” hole
Appears to be well made, alignment bar slides in nicely. As stated, you need to drill a hole in the bar for the gimble bearing driver, the directions are not clear, what I did was before I take out the old gimble bearing, put an O ring on the bar close to the last step on the bar, slide the bar all the way in, then carefully slide the bar out, this marks the distance from the back of the gimble bearing to where the shaft on the outdrive bottoms out, move the O ring a 1/4” towards the stepped part of the alignment tool (this is so you won’t bottom out the alignment tool when driving the gimble bearing in) then slide the driver puck up to the O ring and use a 3/8” diameter transfer punch through the side hole in the puck to mark the bar. You need to drill a 3/8” diameter hole in the alignment bar, two V blocks, some clamps, and a drill press will make drilling much easier, after the bar is securely mounted and centered in the drill press, use a center drill, then 1/4” drill first, using plenty of oil, drill all the way through, then use the 3/8” drill, deburr both sides and you should be good to go. People complain that it doesn’t come pre-drilled, the reason is that not all out drives are the same so you have to fit it to the outdrive that you have. Fortunately, I have a machine shop at my house and have a jig setup with various drill bushings, but the method I described above should work for you. Just make sure you’re perfectly centered and secure before you start drilling.
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Reviewed in the United States on April 16, 2026