FM1105 Datasheet PDF - Ramtron International Corporation
Part Number | FM1105 | |
Description | Nonvolatile 5V Dual State Saver | |
Manufacturers | Ramtron International Corporation | |
Logo | ||
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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
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FM1105 NV Dual State Saver
AC Parameters (TA = -40° C to + 85° C, VDD = 4.5V to 5.5V, CL = 30 pF unless otherwise specified)
Symbol Parameter
Min Max
fMAX
tLOW
tHIGH
tPD
tHZ
tR
tF
tDS
tDH
tEHD
the
Maximum Clock Frequency
CLK Low Period
CLK High Period
Propagation delay CLK to QN
EN Low to QN Hi-Z
Input Rise Time
Input Fall Time
Data (DN) Setup Time to CLK ↑
Data (DN) Hold Time after CLK ↑
EN Hold Time (EN High after CLK ↑)
EN High Time
1
0.3
0.3
50
25
100
100
5
10
0
5
tEL EN Low Time
2
Notes
1. This parameter is characterized but not tested.
Units
MHz
µs
µs
ns
ns
ns
ns
ns
ns
µs
µs
µs
Notes
1
1
1
Power Cycling and Data Retention (TA = -40° C to + 85° C, VDD = 4.5V to 5.5V, unless otherwise specified)
Symbol
Parameter
Min Max Units Notes
Nonvolatile Data Retention Time
45 - years
tVDR
tVDF
tRES
tPDS
tEHFC
VDD Rise Time
VDD Fall Time
EN High to QN Restore Time
EN Low to Power Down Time
EN High to First Clock (CLK ↑) after Power Up
25
-
µs/V
1
50 - µs/V 1
-
0.5 µs
2
1 - µs
4 - µs 3
Notes
1. Slope measured at any point on VDD waveform.
2. After power up, when EN goes high the nonvolatile latches are read and the values restored to the outputs QN.
3. After power up, this is the minimum time required before a state change operation may occur. EN and VDD may be
coincident at power up, and in this case tEHFC time is referenced to VDD (min) and CLK ↑.
Capacitance (TA = 25° C , f=1.0 MHz, VDD = 5.0V)
Symbol
Parameter
CI Input Capacitance
Notes
1. This parameter is characterized but not tested.
Min Max Units Notes
- 8 pF 1
Rev. 1.1
Aug. 2007
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