ELM ELM9709NBA, ELM9710NBA, ELM9711NBA, ELM9722CAA, ELM9724CAA Schematic [ru]
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ELM97xxxxA ELM97xxxxA
ELM97xxxxA VOLTAGE DETECTOR
ELM97xxxxA ELM97xxxxA
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■ GENERAL DESCRIPTION
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ELM 97xxxxA Series is a CMOS voltage detector IC for battery-operated portable devices. It consists of a
very low-power-consumption reference voltage source, a comparator , an output driver, a hysteresis circuit,
and detection voltage setting resistors. Output logic is positive, therefore output level is low when VDD is
lower than detection voltage.
It can be used as a reset controller in microcomputer-based systems. And it can be widely applied to the
devices, such as battery checkers, switching circuit of back-up power source, power failure detectors, etc.
Two output styles are available, N-ch opendrain and CMOS output.
It is available in SOT-89 and SOT-23.
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■ FEATURES
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・ Low power operation : TYP. 1.0μ A (VDD = 1.5V)
・ Low voltage operation : Reset operation assured at 0.8V
・ High accuracy of detection voltage : ± 2.5%
・ Low temperature coefficient : TYP. -300ppm/℃ (Detection voltage ＜2.0V)
: TYP. -100ppm/℃ (Detection voltage ≧2.0V)
・ Very small package : SOT-89, SOT-23
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■ APPLICATION
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・ Reset for microcomputer
・ Battery checker
・ Power failure detector
・ Switching of back-up power source
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■ PIN CONFIGURATION
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SOT-89
1 23
( TOP VIEW )
Pin No. Pin Name
1 OUT
2 VDD
3 VSS
3
SOT-23
1 2
( TOP VIEW )
Pin No. Pin Name
1 OUT
2 VSS
3 VDD
147
VOLTAGE DETECTOR ELM97xxxxA
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■ SELECTION GUIDE
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Symbol
Ex 09 : VDETN = 0.9V
a, b Detection Voltage
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■ SERIES
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c Output Form
d Package
e Product Version
C : CMOS Output
N : N-ch Opendrain Output
A : SOT-89
B : SOT-23
A : A Version
27 : VDETN = 2.7V
45 : VDETN = 4.5V
ELM97 x x x x AELM97 x x x x A
ELM97 x x x x A
ELM97 x x x x AELM97 x x x x A
↑↑↑↑↑↑↑↑↑↑
↑↑↑↑↑
↑↑↑↑↑↑↑↑↑↑
a b c d ea b c d e
a b c d e
a b c d ea b c d e
Model Package Model Package
ELM9709NBA-S(N) 0.9V N-ch SOT-23 ELM9727CAA-S(N) 2.7V CMOS SOT-89
ELM9710NBA-S(N) 1.0V N-ch SOT-23 ELM9730CAA-S(N) 3.0V CMOS SOT-89
ELM9711NBA-S(N) 1.1V N-ch SOT-23 ELM9732CAA-S(N) 3.2V CMOS SOT-89
ELM9722CAA-S(N) 2.2V CMOS SOT-89 ELM9734CAA-S(N) 3.4V CMOS SOT-89
ELM9724CAA-S(N) 2.4V CMOS SOT-89 ELM9745CAA-S(N) 4.5V CMOS SOT-89
ELM9725CAA-S(N) 2.5V CMOS SOT-89 ELM9748CAA-S(N) 4.8V CMOS SOT-89
S type : Standard, N type : Reverse
* Available 0.9V～5.0V detection voltage for N-ch output and 2.0V～5.0V detection voltage for CMOS
output at 0.1V step as semi-custom-made IC.
Detection Output Detection Output
Voltage Form Voltage Form
148
VOLTAGE DETECTOR ELM97xxxxA
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■ MARKING
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SOT-89
①②
③④
Rule 1
① : Represents the integer digit of the detection voltage
Symbol Detection Voltage Symbol Detection Voltage
A 0.*V (N-ch) P 2.*V (CMOS)
B 1.*V (N-ch) R 3.*V (CMOS)
C 2.*V (N-ch) S 4.*V (CMOS)
D 3.*V (N-ch) T 5.*V (CMOS)
E 4.*V (N-ch)
F 5.*V (N-ch)
② : Represents the decimal digit of the detection voltage
SOT-23
①②③④
Symbol Detection Voltage Symbol Detection Voltage
0 *.0V 5 *.5V
1 *.1V 6 *.6V
2 *.2V 7 *.7V
3 *.3V 8 *.8V
4 *.4V 9 *.9V
③ : Represents the assembly lot number
A～ Z repeated (I,O,X excepted)
④ : Represents the assembly lot number
0～ 9 repeated
Rule 2
①: Represents the ELM97xxxxA series
ELM97xxxxA series = A
② : Represents the integer digit of the detection voltage
Symbol Detection Voltage Symbol Detection Voltage
0 0.*V (N-ch) Y 2.*V (CMOS)
1 1.*V (N-ch) W 3.*V (CMOS)
2 2.*V (N-ch) U 4.*V (CMOS)
3 3.*V (N-ch) V 5.*V (CMOS)
4 4.*V (N-ch)
5 5.*V (N-ch)
③ : Represents the decimal digit of the detection voltage
Symbol Detection Voltage Symbol Detection Voltage
0 *.0V 5 *.5V
1 *.1V 6 *.6V
2 *.2V 7 *.7V
3 *.3V 8 *.8V
4 *.4V 9 *.9V
④ : Represents the assembly lot number
0～ 9, A～ Z repeated (I,O,X excepted)
*Remarks --- ELM97xxxxA series have two kind of mraking rules each package.
149
VOLTAGE DETECTOR ELM97xxxxA
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■ BLOCK DIAGRAM
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1.CMOS Output 2.N-ch Opendrain Output
VDD
VREF
VSS
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■ TIMING CHART
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VDD
+
-
VDETP
VDETN
VopMin
VSS
OUT
VDD
VSS
VREF
VHYS
OUT
+
-
OUT
VSS
tPHL
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■ MAXIMUM ABSOLUTE RATINGS
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Parameter Limits Units
Power Supply Voltage 10 V
Output Voltage
Output Current 50 mA
Power Dissipation
Operating Temperature -30～+80
Storage Temperature -40～+125
Symbol
VOUT
Pd
VDD
CMOS VSS-0.3～VDD+0.3
N-ch VSS-0.3～+10
IOUT
SOT-89 300
SOT-23 200
Top
Tstg
tPLH
(VSS=0V)
V
mW
℃
150
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