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| MITSUBISHI M62009L,P,FP LOW POWER 2 OUTPUT SYSTEM RESET IC WITH EXTERNAL INPUT DESCRIPTION As applications for microcomputers are increasing,a desire has arisen for a RAM backup function.Let us introduce Mitsubishi Electric new low power dissipation,high-performance system reset IC,which is suitable for such RAM backup. The M62009,which is a low power-dissipation 2-output microcomputer system reset IC,is a 2-output system reset IC which provides for RAM backup in microcomputers,and reduces power dissipation by using the Bi-CMOS process.The M62009 considerably reduces the number of components in the reset circuit. The M62009 performs two-stage detection of normal supply voltage and backup supply voltage required for backup mode.When the supply voltage is switched from normal supply voltage to back up supply voltage the interruption output,which is one of the two outputs,gives the interruption signal to a microcomputer,in this way,the microcomputer reduces power dissipation and enters in the backup mode. If the backup supply voltage goes lower than the voltage required for backup,the reset output(RESET output)which is different from the INT output gives the reset signal (forced reset) to the microcomputer.The interruption signal from the INT output recovers the microcomputer from the backup mode. To recover from reset, RESET output is canceled when the specified interval of time (delay time) elapses after the signal is given from the INT output. PIN CONFIGURATION (TOP VIEW) 8 7 6 5 4 3 2 1 NC Vcc1 Cd RESET GND INT Vcc2 VI Outline 8P5(L) VI Vcc2 INT GND 1 2 3 4 8 7 6 5 NC Vcc1 Cd RESET FEATURES *Bi-CMOS process low power dissipation circuit configuration Icc=7A(Typ.) (Normal mode Vcc1=Vcc2=5.0V) Icc=5A(Typ.) (Backup mode Vcc1=5.0V) Icc=1A(Typ.) (Backup mode Vcc1=2.5V) *Two supply detection Vcc1(RESET) Vcc1-1=4.0V(typ):Increase of Vcc1 Vs1-2=2.0V(typ):Decrease of Vcc1 Vcc2(INT) Free set up *Two outputs(open drain type) Reset output (RESET):Forced reset signal output Interruption output(INT):Output of the signal for interruption processing (output of the switching signal for backup mode) Outline 8P4(P) 8P2S-A(FP) NC:NO CONNECTION *Packages 2 types 5-pin SIP (single in-line) 8-pin SOP (mini flat) APPLICATION Prevention of errors in microcomputer system in electronic equipment that requires RAM backup,such as office,industrial,and home-use equipment. BLOCK DIAGRAM Vcc1 7 Vs1-1 4.0V(TYP)DETECTION Vs1-2 2.0V(TYP)DETECTION BIAS CIRCUIT + Vcc2 VI DELAY CIRCUIT 5 6 RESET Cd INT 2 1 + Vs2 1.25V(TYP) 3 4 GND MITSUBISHI ELECTRIC ( 1 /3) MITSUBISHI M62009L,P,FP LOW POWER 2 OUTPUT SYSTEM RESET IC WITH EXTERNAL INPUT ABSOLUTE MAXIMUM RATINGS(Ta=25C, unless otherwise noted) Symbol Vcc ISINK Pd K Topr Tstg Parameter Supply voltage Output sink current Power dissipation Thermal derating Operating temperature Storage temperature (Ta25C) Conditions Ratings 8 5 800(SIP)/625(DIP)/440(FP) 8(SIP)/6.25(DIP)/4.4(FP) -20 ~ +75 -55 ~ +125 Unit V mA mW mW/C C C ELECTRICAL CHARACTERISTICS(Ta=25C, unless otherwise noted) Symbol Vs 1-1 Vs 1-2 Vs 2 Vs ICC ICC2-1 ICC2-2 td Vsat Parameter Detection voltage Detection voltage Reference voltage Hysteresis voltage Circuit Current Circuit Current Circuit Current Delay time Output saturation voltage Test conditions Increase of Vcc1 Decrease of Vcc1 Decrease of VI Vcc2=Detection voltage of hysteresis voltage (Detection voltage=4V set up) Vcc1=Vcc2=5V Vcc1=5V Vcc2=0V Vcc1=2.5V Vcc2=0V Cd=0.33F VIN=5V Ic=4mA(NMOS) Min. 3.8 1.85 1.20 Limits Typ. 4.0 2.00 1.25 87 7 5 1 50 0.2 30 20 4.5 0.4 Max. 4.2 2.15 1.30 Unit V V V mV A A A mS V MITSUBISHI ELECTRIC ( 2 /3) MITSUBISHI M62009L,P,FP LOW POWER 2 OUTPUT SYSTEM RESET IC WITH EXTERNAL INPUT TIMING CHART VSH VSL VSH VSL VSH VSL Vcc2 INT 1 2 1 2 1 2 Vs1-1 Vcc1 Vs1-2 Vs1-1 Vs1-2 td RESET td 3 4 3 4 1 Vcc2=VSH(Increase of Vcc2)INT output Low 2 Vcc2=VSL(Decrease of Vcc2)INT output High 3 Delay time obtained from Vs1-1.td=50msec(Cd=0.33F):td=1.52X10 5XCd(sec) RESET output:reset cancel(cancel) 4 Vcc1=VS1-2(Vcc1 Decrease) RESET output:forced reset output(L reset) APPLICATION CIRCUIT EXAMPLE SUPPLY VOLTAGE 5.6V VDD BACKUP CAPACITOR Vcc1 RESET RESET Vcc2 INT VI INT Cd DELAY CAPACITOR Cd SMOOTHING CAPACITOR MICROCOMPUTER SYSTEM RESET IC MICROCOMPUTER MITSUBISHI ELECTRIC ( 3/3) |
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