Preliminary
FM1112B
Nonvolatile 3V Quad State Saver
Features
Nonvolatile State Saver
Low Power Operation
Logic States Retained in Absence of Power
Outputs Automatically Restored at Power-up
Unlimited Number of State Changes
Max tPD 50ns at 2.7V
Supply voltage of 2.7V to 3.6V
5 A Standby Current
Industry Standard Configuration
Industrial Temperature -40 C to +85 C
16-pin “Green”/RoHS QFN Package
Max Frequency 1 MHz
Overview
Pin Configuration
The FM1112B is an innovative FRAM-based device
that stores inputs like conventional logic and retains
the stored state in the absence of power. This product
solves three basic problems in an elegant fashion.
First, it provides continuous access to nonvolatile
system settings without performing a memory read
operation or using dedicated processor I/O pins.
Second, it allows the storage of signals that may
change frequently and possibly without notice. Third,
it allows the nonvolatile storage of a system setting
without the system overhead and extra pins of a serial
memory.
1
2
3
4
VDD
D0
Q2
11
D2
Q0
D3
D1
VSS
Functionally, the inputs are stored and passed to the
output on the rising edge of the clock CLK. This
unique product serves a variety of applications. Here
are a few applications:
Top View
Pin Names
DN
QN
Function
Data In
Data Out
Enable
Clock
Supply Voltage
Ground
Control relays or valves with automatic setting
on power-up without processor intervention
Interface to soft/momentary front-panel switch
and indicator lamp. Capture switch settings and
drive LEDs without processor intervention
Replaces jumpers & control signal routing
Initialize state of I/O card signals
EN
CLK
VDD
VSS
Eliminate the overhead of serial memory for
systems needing only a bit of data
Ordering Information
FM1112B-QG
Quad State Saver,
16-pin “Green”/RoHS QFN
FM1112B-QGTR Quad State Saver,
16-pin “Green”/RoHS QFN,
Tape and Reel
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
Rev. 1.0
Oct. 2012
Page 1 of 8