Ramtron FM33256
The FM33256 and FM3316 are devices that integrate FRAM memory with the most commonly needed functions for processor-based systems. The devices operate from 2.7 to 3.6V. Each FM33xx provides nonvolatile RAM available in memory capacity of 16Kb and 256Kb.FEATURES
High Integration Device Replaces Multiple Parts● Serial Nonvolatile Memory
● Real-time Clock (RTC) with Alarm
● Low VDD Detection Drives Reset
● Watchdog Window Timer
● Early Power-Fail Warning/NMI
● 16-bit Nonvolatile Event Counter
● Serial Number with Write-lock for Security Processor Companion
● Active-low Reset Output for VDD and Watchdog
● Programmable Low-VDD Reset Thresholds
● Manual Reset Filtered and Debounced
● Programmable Watchdog Window Timer
● Nonvolatile Event Counter Tracks System Intrusions or other Events
● Comparator for Power-Fail Interrupt or Other Use
● 64-bit Programmable Serial Number with Lock Fast SPI Interface
● Up to 16 MHz Maximum Bus Frequency
● RTC, Supervisor Controlled via SPI Interface
● SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1) Easy to Use Configurations
● Operates from 2.7 to 3.6V
● Small Footprint “Green” 14-pin SOIC (-G)
● Low Operating Current, 50µA Standby Current
● -40°C to +85°C Operation Ferroelectric Nonvolatile RAM
● 256Kb and 16Kb ver...