FM3130
Integrated RTC/Alarm and 64Kb F-RAM
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
45 year Data Retention
NoDelay™ Writes
Real-time Clock/Calendar
Backup Current under 1
A
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 -40C to +85C
Underwriters Laboratory (UL) Recognized
Fast Two-wire Serial Interface
Up to 1 MHz Maximum Bus Frequency
Supports Legacy Timing for 100 kHz & 400 kHz
RTC & F-RAM Controlled via 2-wire Interface
Description
The FM3130 integrates a real-time clock (RTC) and
F-RAM nonvolatile memory. The device operates
from 2.7 to 3.6V.
The FM3130 provides nonvolatile F-RAM 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.
E
T
ent
E
cem 64
L
pla 31
O
t Re : FM
S
irec tive
B
o D rna
O
N Alte
Pin Configuration
X1
X2
1
2
3
4
8
VDD
7
ACS
VBAK
VSS
6
5
SCL
SDA
X1
X2
VBAK
VSS
1
2
3
4
Top View
8
7
6
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
FM3130-GTR
FM3130-DG
FM3130-DGTR
“Green”/RoHS 8-pin SOIC
“Green”/RoHS 8-pin SOIC,
Tape & Reel
“Green”/RoHS 8-pin TDFN
“Green”/RoHS 8-pin TDFN,
Tape & Reel
This product conforms to specifications per the terms of the Ramtron
standard warranty. The product has completed Ramtron‟s internal
qualification testing and has reached production status.
Rev. 3.2
Sept. 2011
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
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RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
