ELM7C377142xx CMOS voltage detector with two power supplies detection

ELM7C377142xx is designed to monitor the voltage level of one or two power supplies (+5V and an arbitrary voltage) in a microprocessor circuit, memory board in large-size computer, for example. If the circuit’s power supply deviates more than a specified amount, then ELM7C377142xx generates a reset signal to the microprocessor.Thus, the computer data is protected from accidental erasure. Using ELM7C377142xx requires few external components. To monitor only a +5V supply, ELM7C377142xx requires the connection of one external capacitor. The level of an arbitrary detection voltage is determined by two external resistors.

Detection voltage with hysteresis function.
Reference voltage is connectable.
Minimal external parts(one capacitor).
Over voltage detector.
Optional voltage drop detectable
with 2 external resistors
Precision voltage detection4.2V±2.5%
Monitors the voltage of
one or two power supplies
+5 and an arbitrary voltage
Low voltage output
for reset signal
Low power dissipation Typ.65µA(Vcc=5V)
PackageSOP-8 150mil
SOP-8 208mil
Reset for Microprocessor, etc.
Power voltage monitoring IC (Reset IC) ELM 7C series
This product is alternative parts that “C” company have discontinued a selling.Please contact us once, if you have trouble with parts procurement.
In addition, since ELM7C377142xx/ELM7C377342xA is new product developed in-house, the power consumption is a quarter of the conventional product.
We have begun accepting sample requests since February 2018. Please feel free to contact us. Mass production is planned from September 2018

Absolute Maximum Ratings

Power supplyVcc20V
Input voltageVsaVss-0.3 to Vcc+0.3(<+8.00)V
Input voltageVsb
Vss-0.3 to +8.0V
RESET_B Output voltageVohVss-0.3 to Vcc+0.3(<+6.5)V
OUTC Output voltageVohVss-0.3 to Vcc+0.3(<+6.5)V
Power dissipationPd680(SOP-8 150mil) *
680(SOP-8 208mil) *
580(MSOP-8) *
Operating temperatureTop-40 to +85°C
Storage temperatureTstg-55 to +150°C

Block diagram