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Description
CYPRESS SEMICONDUCTOR FM25W256-G NVRAM, FRAM, 256 Kbit, 32K x 8bit, SPI, SOICThe FM25W256 G is a 256Kbit (32K 8bit) SPI FRAM (Ferroelectric Random Access Memory) device in 8 pin SOIC package. This non volatile memory reads and writes similar to RAM. It provides reliable data retention for 151 years while eliminating complexities, overhead and system level reliability problems caused by serial flash, EEPROM and other non volatile memories. Unlike serial flash and EEPROM, the FM25W256 performs write operations at bus speed. No
The FM25W256-G is a 256Kbit (32K � 8bit) SPI FRAM (Ferroelectric Random Access Memory) device in 8 pin SOIC package. This non volatile memory reads and writes similar to RAM. It provides reliable data retention for 151 years while eliminating complexities, overhead and system level reliability problems caused by serial flash, EEPROM and other non volatile memories. Unlike serial flash and EEPROM, the FM25W256 performs write operations at bus speed. No write delays are incurred. Data is written to the memory array immediately after each byte is successfully transferred to device. The next bus cycle can commence without need for data polling. In addition, the device offers substantial write endurance compared with other non volatile memories. The FM25W256 provides substantial benefits to users of serial EEPROM or flash as hardware drop-in replacement.
- High endurance 100 trillion (10^14) read/writes
- Automotive grade AEC-Q100 qualified
- Advanced high reliability ferroelectric process
- Up to 20MHz frequency
- Sophisticated write protection scheme
- Low power consumption
- Active current of 250�A at 1MHz
- Typical standby current of 15�A
- Wide operating voltage range from 2.7V to 5.5V
- Operating temperature range from -40�C to 85�C
Applications
Embedded Design & Development
Product details
| Memory Type | FRAM |
| Operating Temperature Min | -40�C |
| Operating Temperature Max | 85�C |
| Access Time | - |
| No. of Pins | 8Pins |
| Memory Size | 256Kbit |
| Product Range | - |
| NVRAM Memory Configuration | 32K x 8bit |
| Memory Case Style | SOIC |
| Supply Voltage Min | 2.7V |
| IC Interface Type | SPI |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| MSL | MSL 1 - Unlimited |
Other details
| Brand | CYPRESS SEMICONDUCTOR |
| Part Number | FM25W256-G |
| 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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.8 ★★★★★
Based on 1842 reviews
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Product Reviews
★★★★★ 5
Near OEM quality at 1/4 cost
Near OEM performance at 25% of the cost! Bosch Quality replaced NGKs/Toyota OEMs. Great value and now the engine is running smoothly! I have seen a slight improvement in my mpg @1mpg overall in mixed driving conditions.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Very Expensive
Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
A reliable set of spark plugs.
They’re made in Germany, what else can you say
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
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Reviewed in the United States on April 29, 2026
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them.
The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine.
Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026