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Please continue to use the ordering part numbers listed in the datasheet for ordering. www.infineon.comFM31276/FM31278 64-Kbit/256-Kbit Integrated Processor Companion with F-RAM 64-Kbit/256-Kbit Integrated Processor Companion with F-RAM Restriction of hazardous substances (RoHS) compliant Features Underwriters laboratory (UL) recognized 64-Kbit/256-Kbit ferroelectric random access memory (F-RAM) Logically organized as 8K 8 (FM31276)/32K 8 (FM31278) Functional Description 14 High-endurance 100 trillion (10 ) read/writes The FM31276/FM31278 device integrates F-RAM memory with 151-year data retention (See Data Retention and Endurance on page 28) the most commonly needed functions for processor-based systems. Major features include nonvolatile memory, real time NoDelay writes clock, low-V reset, watchdog timer, nonvolatile event counter, Advanced high-reliability ferroelectric process DD lockable 64-bit serial number area, and general purpose High Integration Device Replaces Multiple Parts comparator that can be used for a power-fail (NMI) interrupt or Serial nonvolatile memory any other purpose. Real time clock (RTC) The FM31276/FM31278 is a 64-Kbit/256-Kbit nonvolatile Low voltage reset memory employing an advanced ferroelectric process. A Watchdog timer ferroelectric random access memory or F-RAM is nonvolatile Early power-fail warning/NMI and performs reads and writes similar to a RAM. This memory is Two 16-bit event counter truly nonvolatile rather than battery backed. It provides reliable Serial number with write-lock for security data retention for 151 years while eliminating the complexities, overhead, and system-level reliability problems caused by other Real-time Clock/Calendar nonvolatile memories. The FM31276/FM31278 is capable of Backup current at 2 V: 1.15 A at +25 C 14 supporting 10 read/write cycles, or 100 million times more write Seconds through centuries in BCD format cycles than EEPROM. Tracks leap years through 2099 Uses standard 32.768 kHz crystal (6 pF/12.5 pF) The real time clock (RTC) provides time and date information in Software calibration BCD format. It can be permanently powered from an external Supports battery or capacitor backup backup voltage source, either a battery or a capacitor. The timekeeper uses a common external 32.768 kHz crystal and Processor Companion provides a calibration mode that allows software adjustment of Active-low reset output for V and watchdog DD timekeeping accuracy. Programmable low-V reset trip point DD Manual reset filtered and debounced The processor companion includes commonly needed CPU Programmable watchdog timer support functions. Supervisory functions include a reset output Dual Battery-backed event counter tracks system intrusions signal controlled by either a low V condition or a watchdog DD or other events timeout. RST goes active when V drops below a DD Comparator for power-fail interrupt programmable threshold and remains active for 100 ms after 64-bit programmable serial number with lock V rises above the trip point. A programmable watchdog timer DD 2 runs from 100 ms to 3 seconds. The watchdog timer is optional, Fast 2-wire serial interface (I C) but if enabled it will assert the reset signal for 100 ms if not Up to 1-MHz frequency restarted by the host before the timeout. A flag-bit indicates the Supports legacy timings for 100 kHz and 400 kHz source of the reset. 2 RTC, Supervisor controlled via I C interface A comparator on PFI compares an external input pin to the Device select pins for up to 4 memory devices onboard 1.2 V reference. This is useful for generating a Low power consumption power-fail interrupt (NMI) but can be used for any purpose. The 1.5 mA active current at 1 MHz family also includes a programmable 64-bit serial number that 150 A standby current can be locked making it unalterable. Additionally it offers a dual battery-backed event counter that tracks the number of rising or Operating voltage: V = 4.0 V to 5.5 V DD falling edges detected on a dedicated input pin. Industrial temperature: 40 C to +85 C For a complete list of related documentation, click here. 14-pin small outline integrated circuit (SOIC) package Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-86393 Rev. *F Revised November 19, 2018