|
If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
Datasheet File OCR Text: |
MITSUMI System Reset (with battery back-up) MM1134 System Reset (with battery back-up) Monolithic IC MM1134 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 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 1 Power supply switching circuit (switching between main power supply and battery) 2 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) 3 With CS signal gate circuit 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=100A 0.3A typ. 0.3V typ. 0.1A max. 0.2V typ. 4.8V typ. 3.3V typ. IO=50A IO=50mA A : 3.5V typ. B : 4.2V typ. MITSUMI System Reset (with battery back-up) MM1134 Package SOP-8C (MM1134 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. 1 2 3 4 5 6 7 8 Pin name GND RESET CS VBATT CS VOUT Y VCC 8 7 6 5 1 2 3 4 SOP-8C (TOP VIEW) Block Diagram MITSUMI System Reset (with battery back-up) MM1134 Equivalent Circuit Diagram Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Operating voltage Allowable loss Output current Output current (Ta=25C) Symbol TSTG TOPR VCC max. VCCOP Pd IO1 IO2 Rating -40~+125 -20~+75 -0.3~7 -0.3~7 300 80 200 Units C C V V mW mA A Note : IO1 expresses VCC output current value, and IO2 expresses VBATT output current value. MITSUMI System Reset (with battery back-up) MM1134 Electrical Characteristics Item Consumption current I/O voltage difference 1 Output voltage 1 Output voltage 2 Output voltage 3 Detection voltage Hysteresis voltage Reset output voltage L Reset leakage current H Reset operation limit voltage CS output voltage L CS output voltage H CS output voltage L CS output voltage H Symbol ICC VSAT1 VO1 VO2 VO3 VS VS VRSL IRSH VOPL VCSL VCSH VCSL VCSH Typical model: MM1134B(Except where noted otherwise, Ta=25C, VCC=VRS=5V, RRS=10k) Measuring circuit 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 Measurement conditions VCC=5V, VBATT=3V, IO1=0mA VCC=5V, VBATT=3V, IO1=1mA VCC=5V, VBATT=3V, IO1=1mA VCC=5V, VBATT=3V, IO1=15mA VCC=5V, VBATT=3V, IO1=50mA VCC=H L VCC=L H VCC=3.7V VCC=5V, VRS=7.0V VRSL0.4V, VCC=H L VCC=3.7V, VBATT=3V, ICS=1A VCC=5V, VBATT=3V, ICS=-1A VCC=5V, VBATT=3V, ICS=1A, VY=0V VCC=3.7V, VBATT=3V, ICS=-1A, VY=0V VCC=5V, VBATT=3V, ICS=-1A, VY=5V VCC=H L VCC=L H VCC=0V, VBATT=3V, IO2=0A VCC=0V, VBATT=3V, IO2=1A VCC=0V, VBATT=3V, IO2=1A VCC=0V, VBATT=3V, IO2=100A VCC=5V, VBATT=0V VCC=5V, VBATT=3V, VY=0V VY=L H, CL=15pF VY=H L, CL=15pF Min. Typ. Max. Units 1.4 0.03 4.97 4.90 4.80 4.20 100 0.2 0.01 0.8 2.2 0.05 mA V V V V V mV V A V V V V V 0.05 %/C 3.30 3.45 V 100 200 mV 0.05 %/C 0.3 0.5 A 0.2 0.3 V 2.8 V 2.7 V 0.1 A 150 400 A 8 20 ns 8 20 ns 1.25 V 4.95 4.75 4.70 4.00 50 4.40 200 0.4 0.1 1.2 0.1 0.2 4.90 VO-0.1 Detection voltage temperature characteristic VS/ T Power supply switching voltage VB Hysteresis voltage VB Switching voltage temperature characteristic VB/ T Loss current IBL I/O voltage difference 2 Vsat2 Output voltage 4 VO4 Output voltage 5 VO5 Reverse current IOREV Y pin Lo level current IYLO Y pin tpLH Pin transmission delay time tpHL Reference voltage (typical) VREF Note : 3.15 50 2.7 2.6 * * When input pulse rise and fall time is less than 6Nsec. MITSUMI System Reset (with battery back-up) MM1134 Measuring circuit 1 V RS A 1 8 C1 R RS 10k 0.1F ICC A VCC VRS V 2 MM1134 3 7 A IVLO 6 C2 V VO IO ICS V VCS 0.1F A VBATT V I BATT 4 5 V V CS I CS MITSUMI System Reset (with battery back-up) MM1134 Measuring circuit 2 1 RRS 10k 2 MM1134 3 8 C1 0.1F VCC 7 VY 6 C2 0.1F 4 V BATT 5 CL Oscilloscope 15pF VCC INPUT(VY) 50% GND VCSH OUTPUT(VCS) 0.5VCC GND tpLH tpHL MITSUMI System Reset (with battery back-up) MM1134 Timing Chart VE VS VS VB VOPL VCC Y VRSL *VY 0V 0V RESET CS VCSL VCSL 0V CS VCSL VOUT VO4,O5 VCSL 0V VO1,O2,O3 0V = * Use Y pin input voltage at less than 5V when VCC < Vs. Characteristics VOUT-IOUT (VCC=5.0V) (V) 5.000 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) 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) MITSUMI System Reset (with battery back-up) MM1134 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=100A IOL=1A 100 Ambient temperature (C) Reverse current-Temperature 1A Loss current-Temperature 1A Reverse current Loss current 50 100 100nA 100nA 10nA 10nA -80 -50 0 -80-50 0 50 100 Ambient temperature (C) Ambient temperature (C) |
Price & Availability of MM1134 |
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |