Functional Description
The FM24V10 is a 1-Mbit nonvolatile memory employing an advanced ferroelectric process. A ferroelectric random access memory or F-RAM is nonvolatile and performs reads and writes similar to a RAM. It provides reliable data retention for 151 years while eliminating the complexities, overhead, and system-level reliability problems caused by EEPROM and other nonvolatile memories.
Unlike EEPROM, the FM24V10 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 the device. The next bus cycle can commence without the need for data polling. In addition, the product offers substantial write endurance compared with other nonvolatile memories. Also, F-RAM exhibits much lower power during writes than EEPROM since write operations do not require an internally elevated power supply voltage for write circuits. The FM24V10 is capable of supporting 1014 read/write cycles, or 100 million times more write cycles than EEPROM.
These capabilities make the FM24V10 ideal for nonvolatile memory applications, requiring frequent or rapid writes. Examples range from data logging, where the number of write cycles may be critical, to demanding industrial controls where the long write time of EEPROM can cause data loss. The combination of features allows more frequent data writing with less overhead for the system.
The FM24V10 provides substantial benefits to users of serial (I2C) EEPROM as a hardware drop-in replacement. The FM24VN10 is offered with a unique serial number that is read-only and can be used to identify a board or system. Both devices incorporate a read-only Device ID that allows the host to determine the manufacturer, product density, and product revision. The device specifications are guaranteed over an industrial temperature range of –40 C to +85 C.
Features
■ 1-Mbit ferroelectric random access memory (F-RAM) logically organized as 128K × 8
❐ High-endurance 100 trillion (1014) read/writes
❐ 151-year data retention (See Data Retention and Endurance on page 13)
❐ NoDelay™ writes
❐ Advanced high-reliability ferroelectric process
■ Fast two-wire Serial interface (I2C)
❐ Up to 3.4-MHz frequency
❐ Direct hardware replacement for serial (I2C) EEPROM
❐ Supports legacy timings for 100 kHz and 400 kHz
■ Device ID and Serial Number
❐ Manufacturer ID and Product ID
❐ Unique Serial Number (FM24VN10)
■ Low power consumption
❐ 175 A active current at 100 kHz
❐ 90 A (typ) standby current
❐ 5 A (typ) sleep mode current
■ Low-voltage operation: VDD = 2.0 V to 3.6 V
■ Industrial temperature: –40 C to +85 C
■ 8-pin small outline integrated circuit (SOIC) package
■ Restriction of hazardous substances (RoHS) compliant
(Picture: Pinout)
