Cypress Semiconductor FM31L278-G Serial-2 Wire, Serial-I2C FRAM Memory, 256kbit, 2.7 → 3.6 V 14-Pin SOIC

Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

F-RAM Processor Companion

Integrated devices that includes the most commonly needed functions for processor-based systems.

Serial Nonvolatile FRAM Memory
Real-time Clock (RTC)
Low Voltage Reset
Watchdog Timer
Early Power-Fail Warning/NMI
Two 16-bit Event Counters
Serial Number with Write-lock for Security
Battery-backed switchover
Event Counter Tracking
I²C interface

256-Kbit ferroelectric random access memory (F-RAM)
Logically organized as 32 K ´ 8
High-endurance 100 trillion (1014) read/writes
151-year data retention
NoDelay™ writes
Advanced high-reliability ferroelectric process
High Integration Device Replaces Multiple Parts
Serial Non volatile memory
Real time clock (RTC) with alarm
Low VDD detection drives reset
Watchdog window timer
Early power-fail warning / NMI
16-bit Non volatile event counter
Serial number with write-lock for security
Real-time Clock/Calendar
Backup current at 2 V: 1.15 μA at +25 °C
Seconds through centuries in BCD format
Tracks leap years through 2099
Uses standard 32.768 kHz crystal (6 pF/12.5 pF)
Software calibration
Supports battery or capacitor backup
Programmable watchdog window timer
Non volatile event counter tracks system intrusions or other events
Comparator for power-fail interrupt or other use
64-bit programmable serial number with lock
Fast serial peripheral interface (SPI)
Up to 16-MHz frequency
RTC, Supervisor controlled via SPI interface
Supports SPI mode 0 (0, 0) and mode 3 (1, 1)
1.1 mA active current at 1 MHz
150 μA standby current
Operating voltage: VDD = 2.7 V to 3.6 V
Industrial temperature: –40 °C to +85 °C

Attribute Value
Memory Size 256kbit
Organisation 32K x 8 bit
Interface Type Serial-2 Wire, Serial-I2C
Mounting Type Surface Mount
Package Type SOIC
Pin Count 14
Dimensions 8.73 x 3.98 x 1.48mm
Length 8.73mm
Width 3.98mm
Maximum Operating Supply Voltage 3.6 V
Height 1.48mm
Maximum Operating Temperature +85 °C
Minimum Operating Supply Voltage 2.7 V
Number of Bits per Word 8bit
Number of Words 32K
Minimum Operating Temperature -40 °C
175 In stock for delivery within 5 working day(s)
Price (ex. GST) Each
$ 27.52
(exc. GST)
$ 30.27
(inc. GST)
Per unit
1 - 9
10 - 49
50 - 99
100 +
Packaging Options:
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