Description The FM3127x is a family of integrated devices that includes the most commonly needed functions for processor-based systems. Major features include nonvolatile memory available in various sizes, realtime clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for an early power-fail (NMI) interrupt or other purpose. The family operates from 4.0 to 5.5V. Features High Integration Device Replaces Multiple Parts • Serial Nonvolatile 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 Ferroelectric Nonvolatile RAM • 64Kb and 256Kb versions • Virtually Unlimited Read/Write Endurance • 38 year Data Retention (+75 C) • NoDelay™ Writes Real-time Clock/Calendar Backup Current at 2V, 1.15 A (max.) at +25°C Seconds through Centuries in BCD format Tracks Leap Years through 2099 Uses Standard 32.768 kHz Crystal (12.5pF) Software Calibration Supports Battery or Capacitor Backup Processor Companion • Active-low Reset Output for VDD and Watchdog • Programmable VDD Reset Trip Point • Manual Reset Filtered and Debounced • Programmable Watchdog Timer • Dual Battery-backed Event Counter Tracks System Intrusions or other Events • Comparator for Early Power-Fail Interrupt • 64-bit Programmable Serial Number with Lock Fast Two-wire Serial Interface • Up to 1 MHz Maximum Bus Frequency • Supports Legacy Timing for 100 kHz & 400 kHz • Device Select Pins for up to 4 Memory Devices • RTC, Supervisor Controlled via 2-wire Interface Easy to Use Configurations • Operates from 4.0 to 5.5V • 14-pin “Green”/RoHS SOIC package (-G) • Low Operating Current • -40 C to +85 C Operation • Underwriters Laboratory (UL) Recognized
|