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Ramtron International Corporation

FM1105 Datasheet Preview

FM1105 Datasheet

Nonvolatile 5V Dual State Saver

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Preliminary
FM1105
Nonvolatile 5V Dual State Saver
Features
Nonvolatile State Saver
Logic States Retained in Absence of Power
Outputs Automatically Restored at Power-up
Number of State Changes: 1012
Max tPD 50ns at 4.5V
Max Frequency 1 MHz
Overview
The FM1105 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.
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:
! 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
! Eliminate the overhead of serial memory for
systems needing only a bit of data
Low Power Operation
Supply voltage of 4.5V to 5.5V
15 µA Standby Current
Industry Standard Configuration
Industrial Temperature -40° C to +85° C
8-pin “Green”/RoHS SOT-23 Package
Pin Configuration
Pin Names
DN
QN
EN
CLK
VDD
VSS
Function
Data In
Data Out
Enable
Clock
Supply Voltage
Ground
Ordering Information
FM1105
Dual State Saver,
8-pin “Green”/RoHS SOT-23
This is a product that has fixed target specifications but are subject
to change pending characterization results.
Rev. 1.1
Aug. 2007
Ramtron International Corporation
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000
http://www.ramtron.com
Page 1 of 8




Ramtron International Corporation

FM1105 Datasheet Preview

FM1105 Datasheet

Nonvolatile 5V Dual State Saver

No Preview Available !

www.DataSheet4U.com
Block Diagram and Truth Table
DN NV QN
State
CLK Saver
EN
FM1105 NV Dual State Saver
INPUTS
OUTPUT
EN CLK Dn
Qn
HL
L
HH
H
H H or L X
L XX
Q0
Hi-Z
L Low voltage level
H High voltage level
X Don’t Care
CLK rising edge
Q0 Previous output state before CLK
Pin Descriptions
Pin Name
D0, D1
Q0, Q1
CLK
I/O
I
O
I
EN I
VDD
VSS
Supply
Supply
Description
Data inputs
Data outputs
Clock: On a rising edge of CLK, the DN inputs are transferred to the QN outputs. While
CLK is high or low, the QN outputs do not change regardless of the state of the data
inputs. See truth table.
Enable. This active-high input enables the device. When low, inputs are ignored and
updates to the nonvolatile cells are prevented. When high, the device operates
normally.
Power Supply (4.5V to 5.5V)
Ground
Rev. 1.1
Aug. 2007
Page 2 of 8


Part Number FM1105
Description Nonvolatile 5V Dual State Saver
Maker Ramtron International Corporation
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