FM3130 Datasheet, PDF (1/22 Pages) Ramtron International Corporation – Integrated RTC/Alarm and 64Kb FRAM

Preliminary
FM3130
Integrated RTC/Alarm and 64Kb FRAM
Features
High Integration Device Replaces Multiple Parts
• Serial Nonvolatile Memory
• Real-time Clock (RTC) with Alarm
• Clock Output (Programmable frequency)
64Kb Ferroelectric Nonvolatile RAM
• Internally Organized as 8Kx8
• Unlimited Read/Write Endurance
• 10 year Data Retention
• NoDelay™ Writes
Fast Two-wire Serial Interface
• Up to 1 MHz Maximum Bus Frequency
• Supports Legacy Timing for 100 kHz & 400 kHz
• RTC & FRAM Controlled via 2-wire Interface
Description
The FM3130 integrates a real-time clock (RTC) and
FRAM nonvolatile memory. The device operates
from 2.7 to 3.6V.
The FM3130 provides nonvolatile FRAM which
features fast write speed and unlimited endurance.
This allows the memory to serve as extra RAM for
the system microcontroller or conventional
nonvolatile storage. This memory is truly nonvolatile
rather than battery backed.
The real-time clock (RTC) provides time and date
information in BCD format. It can be permanently
powered from external backup voltage source, either
a battery or a capacitor. The timekeeper uses a
common external 32.768 kHz crystal and provides a
calibration mode that allows software adjustment of
timekeeping accuracy.
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.0
Sept. 2006
Real-time Clock/Calendar
• Backup Current under 1 µA
• 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
Easy to Use Configurations
• Operates from 2.7 to 3.6V
• 8-pin “green” SOIC (-G) and TDFN (-DG)
• Low Operating Current
• Industrial Temperature -40°C to +85°C
Pin Configuration
X1
1
X2
2
VBAK
3
VSS
4
8
VDD
7
ACS
6
SCL
5
SDA
X1
X2
VBAK
VSS
1 _{Top View} 8
2
7
3
6
4
5
VDD
ACS
SCL
SDA
Pin Name
X1, X2
ACS
SDA
SCL
VBAK
VDD
VSS
Function
Crystal Connections
Alarm/Calibration/SqWave
Serial Data
Serial Clock
Battery-Backup Supply
Supply Voltage
Ground
Ordering Information
FM3130-G
“Green” 8-pin SOIC
FM3130-DG “Green” 8-pin TDFN
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, [phone]
www.ramtron.com
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