MITSUBISHI<Dig.Ana.INTERFACE> 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 NC 7 Vcc1 6 5 Cd RESET 4 GND 3 2 INT Vcc2 1 VI 1 8 NC Vcc2 2 7 Vcc1 INT 3 6 GND 4 5 Cd RESET Outline 8P5(L) VI Outline 8P4(P) 8P2S-A(FP) FEATURES •Bi-CMOS process low power dissipation circuit configuration Icc=7µA(Typ.) (Normal mode Vcc1=Vcc2=5.0V) Icc=5µA(Typ.) (Backup mode Vcc1=5.0V) Icc=1µA(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) 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 2 VI 1 DELAY CIRCUIT + 5 RESET 6 Cd 3 INT Vs2 1.25V(TYP) 4 GND MITSUBISHI ELECTRIC ( 1 / 3 ) MITSUBISHI<Dig.Ana.INTERFACE> M62009L,P,FP LOW POWER 2 OUTPUT SYSTEM RESET IC WITH EXTERNAL INPUT ABSOLUTE MAXIMUM RATINGS(Ta=25°C, unless otherwise noted) Symbol Vcc ISINK Pd K Topr Tstg Power dissipation Thermal derating Operating temperature Storage temperature Ratings 8 Conditions Parameter Supply voltage Output sink current 5 800(SIP)/625(DIP)/440(FP) 8(SIP)/6.25(DIP)/4.4(FP) -20 ~ +75 (Ta≥25°C) -55 ~ +125 Unit V mA mW mW/°C °C °C ELECTRICAL CHARACTERISTICS(Ta=25°C, unless otherwise noted) Symbol Parameter Test conditions Vs 1-1 Vs 1-2 Vs 2 Detection voltage Detection voltage Reference voltage ∆Vs Hysteresis voltage Increase of Vcc1 Decrease of Vcc1 Decrease of VI Vcc2=Detection voltage of hysteresis voltage (Detection voltage=4V set up) ICC ICC2-1 ICC2-2 td Vsat Circuit Current Circuit Current Circuit Current Delay time Output saturation voltage Vcc1=Vcc2=5V Vcc1=5V Vcc2=0V Vcc1=2.5V Vcc2=0V Cd=0.33µF VIN=5V Ic=4mA(NMOS) MITSUBISHI ELECTRIC Min. 3.8 1.85 1.20 Limits Typ. 4.0 2.00 1.25 Max. 4.2 2.15 1.30 1 50 0.2 V V V mV 87 7 5 Unit 30 20 4.5 0.4 µA µA µA mS V ( 2 / 3 ) MITSUBISHI<Dig.Ana.INTERFACE> M62009L,P,FP LOW POWER 2 OUTPUT SYSTEM RESET IC WITH EXTERNAL INPUT TIMING CHART VSH VSL VSH VSL 2 2 VSH VSL Vcc2 INT 1 1 Vs1-1 1 Vs1-2 Vcc1 td 2 Vs1-1 Vs1-2 td RESET 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=0.33µF):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 Vcc1 BACKUP CAPACITOR RESET RESET Vcc2 INT INT VI SMOOTHING CAPACITOR Cd DELAY CAPACITOR Cd MICROCOMPUTER SYSTEM RESET IC MITSUBISHI ELECTRIC MICROCOMPUTER ( 3 / 3 )