FM1105 Nonvolatile 5V Dual State Saver Features Nonvolatile State Saver Low Power Operation Logic States Retained in Absence of Power Supply voltage of 4.5V to 5.5V Outputs Automatically Restored at Power-up 15 A Standby Current 12 Number of State Changes: 10 Industry Standard Configuration Max t 50ns at 4.5V PD Industrial Temperature -40 C to +85 C Max Frequency 1 MHz 8-pin Green/RoHS SOT-23 Package Overview Pin Configuration 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 Pin Names Function memory. D Data In N Functionally, the inputs are stored and passed to the Q Data Out N output on the rising edge of the clock CLK. This EN Enable unique product serves a variety of applications. Here CLK Clock are a few applications: VDD Supply Voltage VSS Ground Control relays or valves with automatic setting on power-up without processor intervention Ordering Information Interface to soft/momentary front-panel switch FM1105 Dual State Saver, and indicator lamp. Capture switch settings and 8-pin Green/RoHS SOT-23 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 This product conforms to specifications per the terms of the Ramtron Ramtron International Corporation standard warranty. The product has completed Ramtrons internal 1850 Ramtron Drive, Colorado Springs, CO 80921 qualification testing and has reached production status. (800) 545-FRAM, (719) 481-7000 FM1105 NV Dual State Saver Block Diagram and Truth Table D Q INPUTS OUTPUT N N NV Qn EN CLK Dn State CLK H L L Saver H H H H H or L X Q 0 EN L X X Hi-Z L Low voltage level H High voltage level X Dont Care CLK rising edge Q Previous output state before CLK 0 Pin Descriptions Pin Name I/O Description D , D Input Data inputs 0 1 Q , Q Output Data outputs 0 1 CLK Input Clock: On a rising edge of CLK, the D inputs are transferred to the Q outputs. While N N CLK is high or low, the Q outputs do not change regardless of the state of the data N inputs. See truth table. EN Input 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. VDD Supply Power Supply (4.5V to 5.5V) VSS Supply Ground Rev. 3.0 Feb. 2008 Page 2 of 8
