MM1026

MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 System Reset (with battery back-up) Monolithic IC MM1026, 1245, 1080 ,1134 Outline These ICs protect S-RAM data in back-up mode (CS signal makes R-SAM CE pin low and CE pin high) when power supply voltage goes below a certain set voltage (detection voltage 3.5V, 4.2V or 4.5V typ.). Further, it switches from main power supply to battery back-up when power supply voltage drops. Conversely, when power supply rises, it first switches the S-RAM from battery back-up to main power supply (switching voltage 3.3V typ.), then from back-up mode to normal mode (CS signal makes S-RAM CE pin high and CE pin low). These signal processes provide reliable protection against data damage. ------------------------------------------ Features MM1026 • Power supply switching circuit (switching between main power supply and battery) • CS control for S-RAM (normal mode : S-RAM can be accessed; back-up mode: S-RAM can not be accessed low current consumption mode) • Reset output MM1245 • Power supply switching circuit • CS control for S-RAM • CS control signal delay, power supply line chattering removal approx. 1S max. • Supply current from main power supply can be increased by external power transistor MM1080 • Power supply switching circuit • CS control for S-RAM • Low current consumption 60µA typ. MM1134 • Power supply switching circuit • CS control for S-RAM • Gate circuit with CS signal Characteristics 1. Battery back-up 1. Low IC current consumption (loss current) 2. Drop voltage inside IC (input/output voltage difference) 3. Reverse current (reverse leak current) 2. Normal operation 1. Drop voltage inside IC (input/output voltage difference) 2. Output voltage VCC=5V 3. Battery-VCC switching voltage 4. Detection voltage (CS, CS, reset output) ---------------------------- IO=100µA 0.3µA typ. 0.3V typ. 0.1µA max. 0.2V typ. 4.8V typ. 3.3V typ. IO=50µA IO=50mA A : 3.5V typ. B : 4.2V typ. C : 4.5V typ. MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Package DIP-8B (MM D) SOP-8C (MM F) contains detection voltage rank. * Applications 1. 2. 3. 4. 5. Memory cards (S-RAM cards) PCs, word processors Fax machines, photocopiers, other office equipment Sequence controllers, other FA equipment Video games and other equipment with S-RAMs Pin Assignment Pin no. 8 7 6 5 1 2 3 4 5 6 7 8 MM1026 GND RESET CS VBATT CS VOUT NC VCC Pin name MM1245 MM1080 GND GND TC NC CS CS VBATT VBATT NC CS VOUT VOUT Tr.B NC VCC VCC MM1134 GND RESET CS VBATT CS VOUT Y VCC 1 2 3 4 DIP-8P(C)/SOP-8P(C)/SOP-8P(C) Taping Block Diagram MM1026 MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 MM1245 MM1080 MM1134 MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Equivalent Circuit Diagram MM1026 MM1245 MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 MM1080 MM1134 Absolute Maximum Ratings (Ta=25°C) Symbol TSTG TOPR VCC max. VCCOP Pd Rating -40~+125 -20~+75 7 7 300 80 50 200 Units °C °C V V mW mA mA µA Item Storage temperature Operating temperature Power supply voltage Operating voltage Allowable loss MM1245 MM1026 Output current MM1134 MM1080 Output current IO1 IO2 Note : IO1 expresses VCC output current value, and IO2 expresses VBATT output current value. MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Electrical Characteristics Item (Except where noted otherwise, Ta=25°C, VCC=VRS=5V, RRS=10kΩ) Symbol Measurement conditions Min. Typ. Max. 2.0 0.6 1.0 1.4 60 120 1.4 2.2 0.03 0.05 4.95 4.97 0.15 0.30 4.75 4.5 4.7 3.35 4.05 4.30 4.90 4.7 0.30 4.8 3.50 4.20 4.50 100 20 Units mA mA µA mA V V V V V 0.50 3.65 4.35 4.70 V V V V mV mA V µA V V V V V %/°C µS µS µA µA V mV %/°C µA V V V µA µ A V MM1026 MM1245 MM1080 MM1134 I/O voltage difference 1 Output voltage 1 I/O voltage difference 2 MM1245 MM1026 Output voltage 2 MM1134 MM1080 I/O voltage difference 3 MM1245 Output voltage 3 Except MM1245 A type Detection voltage B type C type Hysteresis voltage Maximum base MM1245 driving current Reset output voltage L MM1026 Reset leakage current H MM1134 Reset operation limit voltage CS output voltage L MM1080 CS output voltage H (CS only) MM1026 CS output voltage L MM1245 CS output voltage H MM1134 Detection voltage temperature characteristic ON delay time MM1245 OFF delay time TC pin charge current MM1245 CS source current Power supply switching voltage Hysteresis voltage Switching voltage temperature characteristic Loss current I/O voltage difference 2 Output voltage 4 Output voltage 5 Reverse current Y pin LO H MM1134 level current Reference voltage (typical) Consumption current ------------------------------------------------------------------------ ICC VCC=5V, VBATT=3V, IO1=0mA VSAT1 VO1 VSAT2 VO2 VSAT3 VO3 VS VS IBUF VRSL IRSH VOPL VCSL VCSH VCSL VCSH VS/ T TdON TdOFF ITC ICSSOU VB VB VB/ T IBL Vsat2 V04 V05 IOREV IYLO VREF VCC=5V, VBATT=3V, IO1=1mA VCC=5V, VBATT=3V, IO1=1mA VCC=5V, VBATT=3V, IO1=30mA VCC=5V, VBATT=3V, IO1=15mA VCC=5V, VBATT=3V, IO1=30mA VCC=5V, VBATT=3V, IO1=80mA VCC=5V, VBATT=3V, IO1=50mA VCC=H L VCC=L H VCC=5V, VBUF=4.5V VCC=3V VCC=5V, VRS=7.0V VRSL < 0.4V, VCC=H L = VCC=3.7V, VBATT=3V, ICS=1µA VCC=5V, VBATT=3V, ICS=-1µA VCC=5V, VBATT=3V, ICS=1µA VCC=3.7V, VBATT=3V, ICS=-1µA CTC=OPEN CTC=OPEN VCC=5V, VBATT=3V, VTC=0V VCC=5V, VBATT=3V, VCS=4.5V VCC=H L VCC=L H VCC=0V, VBATT=3V, IO2=0µA VCC=0V, VBATT=3V, IO2=1µA VCC=0V, VBATT=3V, IO2=1µA VCC=0V, VBATT=3V, IO2=100µA VCC=5V, VBATT=0V VCC=5V, VBATT=3V, VY=0V 14 26 0.2 0.4 ±0.01 ±0.1 0.8 1.2 0.1 4.90 0.1 VO-0.1 ±0.05 50 5 0.80 50 3.30 100 0.60 25 3.15 1.10 80 3.45 ±0.05 0.1 0.3 2.7 2.6 0.2 2.8 2.7 0.1 150 1.25 400 Note : Detection voltage ranks A, B B B, C MM1026 MM1134, MM1080 MM1245 MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Timing Chart MM1026 VE VS VS VB VOPL MM1245 VE VS VCC VCC TC VS VB VOPL VTH Set inside IC Delay RESET VRSL VRSH 0V CS VCSH VCSL 0V CS CS VOUT VCSL VCSL CS VCSL VCSH 0V VCSL VCSL VOUT VO4,O5 VO1,O2,O3 0V VO1,O2,O3 VO4,O5 MM1080 VE VS VS VB MM1134 VE VS VS VB VOPL VCC VCC Y *V VRSL Y BATTERY 0V 0V RESET 0V CS VCSL VCSL 0V 4.8V CS VCSL VCSL 0V VOUT 2.8V 0V VO1,O2 CS VCSL 0V VCSL 0V VO3,O4 VOUT VO4,O5 VO1,O2,O3 0V * Characteristics (V) 5.000 Use Y pin input voltage at less than 5V when VCC < Vs. = --------------------- (MM1026, MM1134 series) VOUT-IOUT (VCC=5.0V) VOUT-IOUT (VBAT=3.0V) 3.000 VOUT (V) VOUT (V) .0500/div 0.100/div 4.500 .0000 2.000 10.00/div -100.0 0 0.100/div 1.000 IOUT (mA) IOUT (mA) MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 VCC-IBAT 40.00 VCC-ICC 5.000 IBAT (nA) ICC (mA) 5.000/div .5000/div 0 -10.00 0 1.000/div 10.00 .0000 .0000 1.000/div 10.00 VCC (V) VCC (V) Current consumption-Temperature characteristics Current consumption (mA) 2.0 Output voltage 1, 2-Temperature characteristics 0.3 Output voltage 1, 2 (V) 0.2 IOL=50mA 1.0 0.1 IOL=10mA 0.0 -50 0 50 100 -50 0 50 100 Ambient temperature (°C) Ambient temperature (°C) Output voltage 3, 4-Temperature Output voltage 3, 4 (V) 0.5 0.4 0.3 0.2 0.1 0 -50 0 50 IOL=100µA IOL=1µA 100 Ambient temperature (°C) Reverse current-Temperature 1µA Loss current-Temperature 1µA Reverse current Loss current 50 100 100nA 100nA 10nA 10nA -80 -50 0 Ambient temperature (°C) Ambient temperature (°C) -80 -50 0 50 100 MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Characteristics VOUT (V) 5.000 (MM1080 series) Current consumption-Temperature (Vcc=5V) VIN-IIN IIN (µA) 100.0 0.5000 /div 10.00 /div 0.0000 .0000 IOUT 10.00/div (mA) 100.0 .0000 .0000 VIN .5000/div (V) 5.000 VOUT-IOUT (VBAT-3.0V) VOUT (V) 5.000 VIN-IBATT IBATT (µA) 1.000 .5000 /div .2000 /div 0 .0000 .0000 IOUT 20.00/div (µA) 200.0 -1.000 .0000 VIN .5000/div (V) 5.000 Current consumption-Temperature (VCC=5V) (µA) 80 70 VBAT detection voltage-Temperature (V) 3.3 3.2 VBAT detection voltage 150 3.1 100 50 (mV) 60 50 3.0 -25 0 25 50 75 TEMP (°C) Hysteresis voltage -25 0 25 50 75 TEMP (°C) CS detection voltage-Temperature (V) 4.5 4.0 3.5 150 100 Hysteresis voltage -25 0 25 50 75 TEMP (°C) CS detection voltage (mV) Hysteresis voltage Hysteresis voltage MITSUMI System Reset (with battery back-up) MM1026, 1245, 1080, 1134 Characteristics IOUT-VOUT 5.00 4.90 4.80 4.70 4.60 4.50 4.40 4.30 4.20 4.10 4.00 5 25 (MM1245 series) Current consumption-Temperature Current consumption (mA) 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 VOUT VOUT-CS 47kΩ CS open -25 0 25 50 75 45 65 85 105 125 IOUT (mA) Temperature (°C) CS detection voltage-Temperature voltage (V) 4.4 4.35 4.3 4.25 4.2 4.15 4.1 -25 0 25 50 75 CS-CS pin ON/OFF delay time vs. capacitance TC 10 1 Delay time (S) 100m 10m 1m 100µ 10µ OFF delay time ON delay time Temperature (°C) VBAT detection voltage-Temperature 3.5 3.45 3.4 3.35 3.3 3.25 3.2 -25 0 25 50 75 1µ 10p 100p 0.001µ 0.01µ 0.1µ 1µ Capacitance (F) Use 1S max. for CS-CS pin ON delay time. Voltage (V) Temperature (°C)