DESCRIPTION
MB85RS4MLY is a FeRAM (Ferroelectric Random Access Memory) chip in a configuration of 524,288
words  8 bits, using the ferroelectric process and silicon gate CMOS process technologies for forming
the nonvolatile memory cells. This product is specifically targeted for high-temperature environment such
as automotive applications.
MB85RS4MLY adopts the Serial Peripheral Interface (SPI).
The MB85RS4MLY is able to retain data without using a back-up battery, as is needed for SRAM.
The memory cells used in the MB85RS4MLY can be used for 1013 read/write operations, which is a significant
improvement over the number of read and write operations supported by Flash memory and E2PROM.
As MB85RS4MLY does not need any waiting time in writing process, the write cycle time of MB85RS4MLY
is much shorter than that of Flash memories or E2PROM.
FEATURES
• Bit configuration : 524,288 words  8 bits
• Special Sector Region : 256 words  8 bits
In this region, data storage after (by) three times reflow based on
JEDEC MSL-3 standard condition is guaranteed.
• Unique ID
• Serial Number : 64 bits
In this region, data storage after (by) three times reflow based on
JEDEC MSL-3 standard condition is guaranteed.
• Serial Peripheral Interface : SPI (Serial Peripheral Interfaces)
Correspondent to SPI mode 0 (0, 0) and mode 3 (1, 1)
• Operating frequency : 50 MHz (Max)
• High endurance : 1013 times / byte
• Data retention : 50.4 years (+85 C)
13.7 years (+105 C)
4.2 years (+125 C) or more
Under evaluation for more than 4.2 years(+125 C)
• Operating power supply voltage : 1.7 V to 1.95 V
• Low power consumption : Operating power supply current 3.5 mA (Max@50 MHz)
Standby current 340 A (Max)
• Operation ambient temperature range :  40 C to +125 C
• Package : 8-pin plastic DFN 5mm  6mm
RoHS compliant