RX5VT Datasheet, PDF (3/31 Pages) RICOH electronics devices division – LOW VOLTAGE DETECTOR

R^×5VT SERIES
APPLICATION MANUAL
CONTENTS
OUTLINE ^{......................................................................................................}1
FEATURES^{....................................................................................................}1
APPLICATIONS ^{.............................................................................................}1
BLOCK DIAGRAMS^{.......................................................................................}2
TIME CHART^{.................................................................................................}2
DEFINITION OF OUTPUT DELAY TIME tPLH^{....................................................}2
SELECTION GUIDE ^{.......................................................................................}4
PIN CONFIGURATION ^{...................................................................................}5
PIN DESCRIPTION ^{........................................................................................}5
ABSOLUTE MAXIMUM RATINGS ^{...................................................................}6
ELECTRICAL CHARACTERISTICS^{.................................................................}7
ELECTRICAL CHARACTERITICS BY DETECTOR THRESHOLD ^{....................}10
OPERATION ^{................................................................................................}14
TEST CIRCUITS^{...........................................................................................}15
TYPICAL CHARACTERISTICS^{......................................................................}16
1) Supply Current vs. Input Voltage ^{...........................................................................}16
2) Detector Threshold vs. Temperature ^{.......................................................................}16
3) Output Voltage vs. Input Voltage ^{...........................................................................}17
4) Nch Driver Output Current vs. VDS ^{.........................................................................}18
5) Nch Driver Output Current vs. Input Voltage^{................................................................}19
6) Pch Driver Output Current vs. Input Voltage^{................................................................}20
7) Output Delay Time vs. Load Capacitance ^{..................................................................}20
8) Output Delay Time vs. Input Pin Capacitance ^{..............................................................}21
TYPICAL APPLICATIONS ^{............................................................................}22
• R×5VT×A CPU Reset Circuit(Nch Open Drain Output)^{.......................................................}22
• R×5VT×C CPU Reset Circuit(CMOS Output) ^{................................................................}22
• R×5VT×A Output delay Time Circuit 1 ^{.......................................................................}22
• R×5VT×A Output delay Time Circuit 2 ^{.......................................................................}22
• Memory Back-up Circuit ^{.....................................................................................}22
• Voltage Level Indicator Circuit (lighted when the power runs out)^{............................................}23
• Detector Threshold Changing Circuit ^{........................................................................}23
• Window Comparator Circuit ^{.................................................................................}23
• Excessive Charge Preventing Circuit ^{........................................................................}23