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FM573-P Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part # FM573-P
Description  Nonvolatile Octal Latch/Register
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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FM573-P Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

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Preliminary
This data sheet contains specifications for a product under development.
Ramtron International Corporation
Characterization is not complete; specifications may change without notice.
1850 Ramtron Drive, Colorado Springs, CO 80921
(800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058
27 March 2001
www.ramtron.com
1/10
FM573/574
Nonvolatile Octal Latch/Register
Features
8-bit Nonvolatile Latch
Logic state is preserved in the absence of power
Over 10 Billion (10
10) nonvolatile state changes
Advanced high-reliability ferroelectric process
Operates like conventional CMOS logic
Transparent (573) or D-Flip-flop (574) operation
FM573 transparent for C high, latched for C low
FM574 data is clocked on the rising edge of C
33/80 ns data propagation delay (5V/3V)
30 MHz/12 MHz Maximum frequency (5V/3V)
Automatic Nonvolatile Operation
Latched state is stored automatically
State is automatically restored on power-up
Power supply monitor prevents low-VDD writes
Low Power Operation
Supply voltage of 2.7V to 5.5V
125
µA standby current
Industry Standard Configuration
Industrial temperature -40
° C to +85° C
20-pin SOP or DIP
Description
The FM573 and FM574 are innovative circuits that
store inputs like conventional logic families, and then
retain the stored state in the absence of power. These
products solve three basic problems in an elegant
fashion. First, they provide continuous access to
nonvolatile system settings without performing a
memory read operation or using dedicated processor
I/O pins. Second, they allow the storage of signals or
data that may change frequently and possibly without
notice. Third, they allow the nonvolatile storage of a
few bits of data or system settings without the system
overhead and extra pins of a serial memory. The
FM573 is a transparent latch. The inputs are passed
to the outputs when the clock is high; the state is
latched when the clock goes low. The FM574 is a D-
type register. Inputs are stored and passed to the
outputs on the rising edge of the clock. The
nonvolatile latch is a unique product that serves a
variety of applications. A few ideas as follows:
ü Controls relays and valves with automatic setting
on power-up without processor intervention.
ü Interface to soft/momentary front-panel switches
and indicator lamps. Capture switch settings and
light LED’s without processor intervention.
ü Replaces jumpers & control signal routing
ü Initialize state of I/O card signals.
ü Save system errors or status codes when power
fails with a fast, no overhead write and automatic
restore on power up.
ü Eliminate the overhead of serial memory for
systems needing only a few bits of data.
The FM573 and FM574 are provided in a 20-pin DIP
or SOP. They are rated from –40C to +85C.
Pin Configuration
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
OE
D0
D1
D2
D3
D4
D5
D6
D7
VSS
VDD
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
C
Pin Names
Function
D0-D7
Data in
Q0-Q7
Data Out
C
Clock/Latch Enable
/OE
Output enable
VSS
Ground
VDD
Supply Voltage
Ordering Information
FM573-P
Transparent latch, 20-pin plastic DIP
FM573-S
Transparent latch, 20-pin SOP
FM574-P
Register, 20-pin plastic DIP
FM574-S
Register, 20-pin SOP
Other package types may be available. Contact
the factory for more information.


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