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FM3808 Datasheet 256kb Bytewide Fram

Manufacturer: Ramtron

Overview: Preliminary FM3808 256Kb Bytewide FRAM w/ Real-Time Clock.

Datasheet Details

Part number FM3808
Manufacturer Ramtron
File Size 189.42 KB
Description 256Kb Bytewide FRAM
Datasheet FM3808-Ramtron.pdf

General Description

The FM3808 bines a 256Kb FRAM array with a real-time clock and a system supervisor function.

An external 32.768 kHz crystal drives the timekeeping function.

It maintains time and date settings in the absence of system power through the user’s choice of backup power source – either a capacitor or a battery.

Key Features

  • 256K bit Ferroelectric Nonvolatile RAM.
  • Organized as 32,752 x 8 bits.
  • High Endurance 100 Billion (1011) Read/Writes.
  • 10 year Data Retention.
  • NoDelay™ Writes.
  • 70 ns Access Time/ 130 ns Cycle Time.
  • Built-in Low VDD Protection Real-Time Clock/Calendar Function.
  • Clock Registers in Top 16 bytes of Address Space.
  • Backup Power from External Capacitor or Battery.
  • Tracks Seconds through Centuries in BCD Format.
  • Trac.

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FM3808 Distributor