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| www..com Preliminary FM1112 Nonvolatile 3V Quad State Saver Features Nonvolatile State Saver * Logic States Retained in Absence of Power * Outputs Automatically Restored at Power-up * Unlimited Number of State Changes * Max tPD 50ns at 2.7V * Max Frequency 1 MHz Low Power Operation * Supply voltage of 2.7V to 3.6V * 10 A Standby Current Industry Standard Configuration * Industrial Temperature -40 C to +85 C * 16-pin "Green"/RoHS QFN Package Overview The FM1112 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 Pin Configuration VDD NC NC EN VDD D0 Q0 D1 15 1 2 3 Q2 11 D2 D3 CLK VSS Q1 7 4 VSS Top View Pin Names DN QN EN CLK VDD VSS Function Data In Data Out Enable Clock Supply Voltage Ground Ordering Information FM1112-QG Quad State Saver, 16-pin "Green"/RoHS QFN This is a product that has fixed target specifications but are subject to change pending characterization results. Rev. 1.0 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 Q3 www..com FM1112 NV Quad State Saver Block Diagram and Truth Table INPUTS CLK H or L X OUTPUT Qn L H Q0 Hi-Z DN CLK NV State Saver QN EN EN H H H L L H X Q0 Dn L H X X Low voltage level High voltage level Don't Care CLK rising edge Previous output state before CLK Pin Descriptions Pin Name D(3:0) Q(3:0) CLK EN VDD VSS I/O I O I I 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 (2.7V to 3.6V) Ground Rev. 1.0 Aug. 2007 Page 2 of 8 www..com FM1112 NV Quad State Saver Description Nonvolatile storage applied to logic is a revolutionary concept. The FM1112 simplifies the design of system control functions. This product is unique because it remembers the stored output values in the absence of power. Any change in the latched state is automatically written to a nonvolatile ferroelectric latch. This function is possible due to the fast write time and extremely high write endurance of the underlying ferroelectric memory technology. Use of Enable Pin The FM1112 has an enable pin that is intended to be used in conjunction with a system reset. An activelow reset may be tied directly to the EN pin. At power-up, /RESET will be held low for some time during which the data input and CLK pins will be ignored. Once the system comes out of reset and EN goes high, the outputs QN drive to the state that were previously latched and the device operates normally. When the EN pin is low, the outputs QN are tristated. The enable pin may be tied to VDD since the device integrates a power management circuit that monitors the VDD level during power cycles. Rev. 1.0 Aug. 2007 Page 3 of 8 www..com FM1112 NV Quad State Saver Electrical Specifications Absolute Maximum Ratings Symbol Description VDD Power Supply Voltage with respect to VSS VIN Voltage on any signal pin with respect to VSS TSTG TLEAD Storage temperature Lead temperature (Soldering, 10 seconds) Ratings -1.0V to +5.0V -1.0V to +5.0V and VIN < VDD+1.0V -55C to + 125C 300 C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only, and the functional operation of the device at these or any other conditions above those listed in the operational section of this specification is not implied. Exposure to absolute maximum ratings conditions for extended periods may affect device reliability. DC Operating Conditions (TA = -40 C to + 85 C, VDD = 2.7V to 3.6V unless otherwise specified) Symbol Parameter Min Typ Max Units Notes VDD Power Supply Voltage 2.7 3.6 V ISB Standby Current 10 A 1 CPD Power Dissipation Capacitance 330 pF 2 ILI Input Leakage Current 3 1 A ILO Output Leakage Current 3 1 A VIL Input Low Voltage -0.3 0.3 VDD V VIH Input High Voltage 0.7 VDD VDD + 0.3 V VOH Output High Voltage @ IOH = -1 mA VDD - 0.5 V VOL Output Low Voltage V 0.4 @ IOL = 1 mA (VDD=2.7V) V 0.8 @ IOL = 10 mA (VDD=2.7V) VHYS Input Hysteresis (CLK, DN, EN) 0.05 VDD V 4 Notes 1. CLK = VSS, all other inputs at VDD or VSS. 2. To calculate device power dissipation, PD = CPD*VDD2*fi + CL*VDD2*fo, where fi is the input clk freq, fo is the output freq, 3. 4. and CL is the output load capacitance. Active current IDD may be calculated as IDD = CPD*VDD*fi, assuming outputs are floating. VIN or VOUT = VSS to VDD. This parameter is characterized but not tested. Rev. 1.0 Aug. 2007 Page 4 of 8 www..com FM1112 NV Quad State Saver AC Parameters (TA = -40 C to + 85 C, VDD = 2.7V to 3.6V, CL = 30 pF unless otherwise specified) Symbol Parameter Min Max fMAX Maximum Clock Frequency 1 tLOW CLK Low Period 0.3 tHIGH CLK High Period 0.3 tPD Propagation delay CLK to QN 50 tHZ EN Low to QN Hi-Z 25 tR Input Rise Time 100 tF Input Fall Time 100 tDS Data (DN) Setup Time to CLK 5 tDH Data (DN) Hold Time after CLK 10 tEHD EN Hold Time (EN High after CLK ) 0 tEH EN High Time 5 tEL EN Low Time 2 Notes 1. This parameter is characterized but not tested. Units MHz s s ns ns ns ns ns ns s s s Notes 1 1 1 Power Cycling and Data Retention (TA = -40 C to + 85 C, VDD = 2.7V to 3.6V, unless otherwise specified) Symbol Parameter Min Max Units Nonvolatile Data Retention Time 45 years tVDR VDD Rise Time 25 s/V tVDF VDD Fall Time 50 s/V tRES EN High to QN Restore Time 0.5 s tPDS EN Low to Power Down Time 1 s tEHFC EN High to First Clock (CLK ) after Power Up 4 s Notes 1. 2. 3. Notes 1 1 2 3 Slope measured at any point on VDD waveform. After power up, when EN goes high the nonvolatile latches are read and the values restored to the outputs QN. 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 = 3.3V) Symbol Parameter CI Input Capacitance Notes 1. This parameter is characterized but not tested. Min - Max 14 Units pF Notes 1 Rev. 1.0 Aug. 2007 Page 5 of 8 www..com FM1112 NV Quad State Saver AC Test Conditions Input Pulse Levels Input Rise and Fall Times Input and Output Timing Levels Output Load Capacitance 0.1 VDD to 0.9 VDD 10 ns 0.5 VDD 30pF FM1112 Signal Timing EN 1/fMAX tLOW tHIGH tEL tEHD tEH CLK tDS tDH tHZ tRES DN QN D0 tPD D1 tPD previous t=0 Q0 Q1 Q1 Power Cycle Timing CLK DN QN EN tPDS VDD VDD (MIN) ~ ~ D7 D8 DLAST D0 D1 ~ ~ Q7 Q8 QLAST QLAST Q0 Q1 ~ ~ ~ ~ ~ ~ VDD (MIN) tRES tEHFC Rev. 1.0 Aug. 2007 Page 6 of 8 www..com FM1112 NV Quad State Saver Mechanical Drawing 16-pin QFN (4.0mm x 4.0mm body, 0.65mm pitch) Exposed metal pad. Do not connect to anything except Vss. 4.0 0.1 Pin 1 1 Pin 1 ID 4.0 0.1 2.20 2.00 2 3 4 0.65 typ 0.55 0.10 1.95 REF 0.75 0.05 0.0 - 0.05 0.20 REF. 0.65 typ 0.30 0.05 Note: All dimensions in millimeters. QFN Package Marking Scheme Legend: XXXX=base part number, PP=package designator (Q=QFN, G="green") LLLLLL= lot code YY=year, WW=work week Example: FM1112, "Green" QFN package, Lot 0001, Year 2007, Work Week 32 1112QG 0001 0732 XXXXPP LLLLLL YYWW Rev. 1.0 Aug. 2007 Page 7 of 8 www..com FM1112 NV Quad State Saver Revision History Revision 1.0 Date 8/8/07 Summary Initial Release. Rev. 1.0 Aug. 2007 Page 8 of 8 |
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