programmable timer with extremely low power and low tension circuits for detection

摘要

In the digital integrated circuit device, realized the ultra low power voltage detecting circuit, so that utilize the single connection of digital integrated circuit device and passive component to provide basic timer, programmable timer and low-voltage able to programme to detect (PLVD) circuit in this digital integrated circuit device outside.Can enable the low current source of an inside so that make the external definition capacitor discharge that is connected in this output connection, thereby eliminate demand non-essential resistance.But, can strengthen timing accuracy by increasing external discharge and/or charging resistor.This output connects can be configured to ternary output, and can be driven to height and make the timing capacitor charging and be driven to hang down and make the timing capacitor discharge.Can the working voltage benchmark in for timing and the definite voltage trip point of low-voltage detection.Perhaps the open circuit voltage from comparing with the known voltage that known temperature is determined down perhaps multiplies each other and definite temperature from the current source current value and a constant of comparing with the known current value that known temperature is determined down.