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MM1134 [MITSUMI]

IC for System Reset (battery backup); IC系统复位（备用电池）
MM1134
型号： MM1134
厂家： MITSUMI ELECTRONICS, CORP.    MITSUMI ELECTRONICS, CORP.
描述：

IC for System Reset (battery backup)
IC系统复位（备用电池）

电池
文件： 总8页 (文件大小：94K)
中文：  中文翻译
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IC for System Reset (battery backup) MM1134  
MITSUMI  
IC for System Reset (battery backup)  
Monolithic IC MM1134  
Outline  
-------------------------------------------  
This IC protects SRAM data by setting SRAM in backup mode (setting the CE pin of SRAM low and CE pin  
high with CS signal) when supply voltage falls below a predetermined voltage (detection voltage 3.5V, 4.2V  
typ.). Then, when supply voltage is getting lower, the main power supply is switched to a battery (switching  
voltage 3.3V typ.) to enter backup mode with the battery. Meanwhile, when the power supply rises, first it  
switches to the main power supply (switching voltage 3.3V typ.) from the battey backup mode, then switches  
-------------------------------------------  
SRAM from backup mode to normal mode (by setting the CE pin of SRAM high and CE pin low). Data  
damage can be reliably prevented by this signal processing.  
Features  
1. Power supply switching circuit (switching between the main power supply and a battery)  
2. CS control for SRAM  
Normal mode: Enables access to SRAM  
Backup mode: Disables access to SRAM, 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)  
0.3µA typ.  
0.3V typ.  
IO=100µA  
0.1µA max.  
2. Normal operation  
1. Drop voltage inside IC (input/output voltage difference)  
IO=50µA  
IO=50mA  
0.2V typ.  
4.8V typ.  
3.3V typ.  
2. Output voltage  
VCC=5V  
3. Battery-VCC switching voltage  
4. Detection voltage (CS, CS,- reset output)  
A : 3.5V typ.  
B : 4.2V typ.  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Package  
SOP-8C (MM1134 F)  
The box represents a rank of detection voltage.  
*
Applications  
1. Memory cards (SRAM cards)  
2. PCs, word processors  
3. Fax machines, photocopiers, other OA equipment  
4. Sequence controllers, other FA equipment  
5. SRAM-mounted devices such as video game devices  
Pin Assignment  
Pin no.  
Pin name  
1
2
3
4
5
6
7
8
GND  
RESET  
CS  
VBATT  
8
1
7
2
6
3
5
4
CS  
VOUT  
Y
VCC  
SOP-8C  
(TOP VIEW)  
Block Diagram  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Equivalent Circuit Diagram  
°
(Ta=25 C)  
Absolute Maximum Ratings  
Item  
Symbol  
TSTG  
TOPR  
VCC max.  
VCCOP  
Pd  
Rating  
Units  
°
C
°
C
V
V
mW  
mA  
µA  
Storage temperature  
Operating temperature  
Power supply voltage  
Operating voltage  
Allowable loss  
-
40~+125  
-20~+75  
-
-
0.3~7  
0.3~7  
300  
Output current  
IO1  
IO2  
80  
200  
Output current  
Note : IO1 expresses VCC output current value, and IO2 expresses VBATT output current value.  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Typical model: MM1134B(Except where noted otherwise, Ta=25°C, VCC=VRS=5V, RRS=10kΩ)  
Electrical Characteristics  
Measuring  
Item  
Symbol  
Measurement conditions  
Min. Typ. Max. Units  
circuit  
1
1
1
1
1
1
1
1
1
1
1
1
Consumption current  
I/O voltage difference 1  
Output voltage 1  
ICC  
VSAT1  
VO1  
VO2  
VO3  
VS  
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  
1.4  
0.03 0.05  
4.95 4.97  
4.75 4.90  
4.70 4.80  
2.2 mA  
V
V
V
V
V
Output voltage 2  
Output voltage 3  
Detection voltage  
VCC=H  
VCC=L  
L
H
4.00 4.20 4.40  
Hysteresis voltage  
VS  
50  
100 200 mV  
0.2 0.4  
0.01 0.1 µA  
Reset output voltage L  
Reset leakage current H  
Reset operation limit voltage  
CS output voltage L  
CS output voltage H  
CS output voltage L  
VRSL  
IRSH  
VOPL  
VCSL  
VCSH  
VCSL  
VCC=3.7V  
V
VCC=5V, VRS=7.0V  
VRSL≤0.4V, VCC=H  
L
0.8  
1.2  
0.1  
V
V
V
V
VCC=3.7V, VBATT=3V, ICS=1µA  
VCC=5V, VBATT=3V, ICS=  
CC=5V, VBATT=3V, ICS=1µA, V  
CC=3.7V, VBATT=3V, ICS 1µA, V  
1µA, V  
-1µA  
4.90  
1
V
V
V
Y
=0V  
0.2  
=-  
Y
=0V  
CS output voltage H  
VCSH  
1
V
O
-0.1  
V
CC=5V, VBATT=3V, ICS  
=-  
Y
=5V  
˚
Detection voltage temperature characteristic VS/ T  
1
1
1
1
1
1
1
1
1
1
2
2
0.05 %/C  
3.15 3.30 3.45  
50  
Power supply switching voltage  
VB  
VCC=H  
VCC=L  
L
H
V
Hysteresis voltage  
VB  
100 200 mV  
˚
Switching voltage temperature characteristic VB/ T  
0.05 %/C  
Loss current  
I/O voltage difference 2  
Output voltage 4  
IBL  
Vsat2  
VO4  
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  
0.3  
0.2  
2.8  
2.7  
0.5  
0.3  
µA  
V
V
2.7  
2.6  
Output voltage 5  
VO5  
V
Reverse current  
IOREV  
IYLO  
tpLH  
tpHL  
VREF  
0.1  
150 400  
µA  
µA  
ns  
ns  
V
Y pin Lo level current  
Y pin  
VCC=5V, VBATT=3V, VY=0V  
VY=L H, CL=15pF  
8
8
20  
20  
*
Pin transmission delay time  
Reference voltage (typical)  
VY=H L, CL=15pF  
*
1.25  
Note : When input pulse rise and fall time is less than 6Nsec.  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Measuring circuit 1  
VRS  
ICC  
A
A
1
2
3
4
8
7
6
5
C1  
VCC  
0.1µF  
RRS 10k  
V
VRS  
A
IVLO  
MM1134  
V
V
V
ICS  
VCS  
C2  
VO  
IO  
0.1µF  
A
V
VBATT  
IBATT  
VCS  
ICS  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Measuring circuit 2  
1
2
3
4
8
7
6
5
C1  
VCC  
0.1µF  
RRS 10k  
VY  
MM1134  
C2  
0.1µF  
VBATT  
Oscilloscope  
CL  
15pF  
VCC  
INPUT(VY)  
50%  
GND  
VCSH  
OUTPUT(VCS)  
0.5VCC  
GND  
tpLH  
tpHL  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Timing Chart  
VS  
VE  
V
VS  
VBOPL  
VCC  
VY  
*
Y
0V  
0V  
VRSL  
VCSL  
VCSL  
RESET  
CS  
CS  
0V  
VCSL  
VCSL  
0V  
0V  
VOUT  
VO1,O2,O3  
VO4,O5  
<
Use Y pin input voltage at less than 5V when VCC Vs.  
=
*
Characteristics  
VOUT-IOUT (VCC=5.0V)  
VOUT-IOUT (VBAT=3.0V)  
(V)  
3.000  
5.000  
0.100/div  
.0500/div  
2.000  
0
4.500  
.0000  
1.000  
-100.0  
0.100/div  
10.00/div  
IOUT (mA)  
IOUT (mA)  
VCC-IBAT  
VCC-ICC  
5.000  
40.00  
.5000/div  
5.000/div  
0
.0000  
-10.00  
.0000  
10.00  
0
10.00  
1.000/div  
1.000/div  
VCC (V)  
VCC (V)  
IC for System Reset (battery backup) MM1134  
MITSUMI  
Current consumption-Temperature  
characteristics  
Output voltage 1, 2-Temperature  
characteristics  
0.3  
2.0  
IOL=50mA  
0.2  
1.0  
0.0  
0.1  
IOL=10mA  
-50  
0
50  
100  
-50  
0
50  
100  
Ambient temperature (°C)  
Ambient temperature (°C)  
Output voltage 3, 4-Temperature  
0.5  
0.4  
IOL=100µA  
IOL=1µA  
100  
0.3  
0.2  
0.1  
0
-50  
0
50  
Ambient temperature (°C)  
Reverse current-Temperature  
Loss current-Temperature  
1µA  
1µA  
100nA  
10nA  
100nA  
10nA  
-80  
-50  
0
50 100  
-80  
-50  
0
50 100  
Ambient temperature (°C)  
Ambient temperature (°C)  

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