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Reset ICs

PST894B

Overview

This IC is a reset IC for turning on/off power supply and power flicker in CPU or logic systems. This IC can change delay time by an external capacitor. Charging method of the capacitor, is current source type.
Current source type can reduce temperature fluctuations in the delay time.
td typ. ±6% (Ta=-40℃ to 105℃), It is ideal for a wide set the operating temperature range.

Application

・Reset circuits for microcomputers, CPUs and MPUs
・Reset circuits for logic circuits
・Battery voltage check circuits
・Back-up power supply switching circuits
・Level detection circuits

Features

Low current consumption,
Delay circuit with reduced temperature fluctuation

Main specifications

Absolute maximum
rating
[V]
Recommended
operating voltage
Min.
[V]
Recommended
operating voltage
Max.
[V]
Detection voltage
Min.
[V]
Detection voltage
Max.
[V]
Detection voltage accuracy
[%]
Consumption current
[μA]
Release delay time Output type Output Logic Separated sense pin Manual reset Circuit structure Operating Ambient Temperature
Min.
[deg.C]
Operating Ambient Temperature
Max.
[deg.C]
Hysteresis voltage
Typ.
[V]
Delay pin charge current current
Typ.
[nA]
Detection pin threshold voltage
Typ.
7.0 0.95 6.50 1.6 5.2 ±1 0.35 Adjustable Open drain Active L No No 1ch Reset -40 105 VTH(Typ.)×0.05 100 VDD×0.5
Absolute maximum
rating
[V]
Recommended
operating voltage
Min.
[V]
Recommended
operating voltage
Max.
[V]
Detection voltage
Min.
[V]
Detection voltage
Max.
[V]
Detection voltage accuracy
[%]
Consumption current
[μA]
7.0 0.95 6.50 1.6 5.2 ±1 0.35
Release delay time Output type Output Logic Separated sense pin Manual reset Circuit structure
Adjustable Open drain Active L No No 1ch Reset
Operating Ambient Temperature
Min.
[deg.C]
Operating Ambient Temperature
Max.
[deg.C]
Hysteresis voltage
Typ.
[V]
Delay pin charge current current
Typ.
[nA]
-40 105 VTH(Typ.)×0.05 100
Detection pin threshold voltage
Typ.
VDD×0.5

Package

Download

Associated Data

Engineering Information

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