Nippon Radio has developed two new system reset ICs for monitoring power supply voltage circuits in various electrical equipment by using micro-machining technology and independently developed circuit technology to replace the previous products NJM2103 and NJM2102. One is the system reset IC NJU2103A and NJU2103B which can monitor the power supply voltage and arbitrary voltage with 2 system monitoring methods. The other is the built-in watchdog timer, the system reset IC NJU2102A, which enables various microcomputer systems to have a fail-safe function.
The voltage detection accuracy of NJU2103A, NJU2103B and NJU2102A reaches 1%, and the power consumption is also halved compared with previous products, thus improving the characteristics of the products.

Due to the improvement of the voltage detection accuracy of the system reset IC, the voltage can be set in the vicinity of the detection voltage, and the accuracy of the power supply monitoring of the electrical equipment is also improved. These features, combined with low power consumption, can extend the life of battery-powered devices.
【Features】
(NJU2103A)
・Can directly replace NJM2103 products (DMP8 package, DIP8 package)
・Detectable power supply voltage 4.2V±1.0% and arbitrary voltage (VSB detection voltage 1.22V ±1.0%)
・Low current consumption 280µA typ.
(NJU2103B)
・The VSB detection voltage and VSC detection voltage are set to match the MB3771 , so it is most suitable for compatible replacement*1
・Detectable power supply voltage 4.2V±1.0% and arbitrary voltage (VSB detection voltage 1.23V±1.0%)
・Low current consumption 280µA typ.
(NJU2102A)
・The NJM2102 product can be directly replaced ・The detection voltage and various setting times are set to match the MB3773, so it is most suitable for compatible replacement*1
・Detectable power supply voltage 4.2V±1.0%
・Built-in watchdog timer
1 Package pad size is different

【Performance improvement】
The adoption of micro-processing technology and the independently developed circuit technology have improved the various characteristics of our products in terms of high precision, low power consumption, miniaturization, etc., which help to improve the reliability of the power monitoring system in the application of microcomputer monitoring system. .

Here are just some examples of features

【Product performance】
・System reset IC

・System reset IC with built-in watchdog timer

【application】
8226 ; Industrial equipment • Residential equipment • Office automation equipment • Entertainment equipment • Any electrical equipment that has a power circuit