ELM73xxxxxxA
CMOS Voltage detector with delay circuit and Manual Reset function

ELM73xxxxxxA is CMOS voltage detector IC with delay function; delay time is adjustable by external capacitor. It operates with very low current consumption; 260nA(typ.). The type with Manual Reset function is also available in ELM73xxxBxxA series; reset condition can be manually asserted at any time. There are two output forms available; N-ch opendrain and CMOS output. The output logic is positive, therefore, the output becomes low level when VDD is lower than detection voltage. The standard detection voltages are 2.2V, 2.7V, 3.0V and 4.0V; ELM73 series can also be made as semi-custom IC within the range of 1.4~5.0V by 0.1V step.

Detection voltage range1.4V to 5.0V(by 0.1V)
Low power operationTyp.260nA
(Vdd=VdetN+1V)
Accuracy of detection voltage±30mV(VdetN<2.5V)
±1.2%(VdetN>=2.5V)
Accuracy of delay timeTyp.15%(ExtC=4.7nF)
Hysteresis voltageTyp.VdetN×1.04
Manual reset inputMR pin
(ELM73xxxBxxA only,
Built-in pull-up resistor)
PackageSC-82AB(SOT-343)
SC-70-5(SOT-353)
SOT-25
DatasheetELM73series
Application
Reset for microcomputers
Voltage power shortage detectors
Switch of back-up power source
Battery checkers

Absolute Maximum Ratings

ParameterSymbolLimitUnit
Power supply voltageVddVss-0.3 to 7.0V
Apply voltage to OUT pinVoutN-ch:Vss-0.3 to 7.0
CMOS:Vss-0.3 to Vdd+0.3
V
Apply voltage to ExtC pinVExtCVss-0.3 to Vdd+0.3V
Apply voltage to MR pinVmrVss-0.3 to Vdd+0.3V
Output currentIout100mA
Power dissipationPd250(SOT-25)
150(SC-70-5(SOT-353))
150(SC-82AB(SOT-343))
mW
Operating temperatureTop-40 to +85°C
Storage temperatureTstg-55 to +125°C

Block diagram

ELM73xxNAxxA

block-diagram

ELM73xxCAxxA

block-diagram

ELM73xxNBxxA

block-diagram

ELM73xxCBxxA

block-diagram