RX5VT Datasheet, PDF (27/31 Pages) RICOH electronics devices division – LOW VOLTAGE DETECTOR

R×5VT
• Voltage Level Indicator Circuit (lighted when the power runs out)
( Nch Open Drain Output)
VDD
VDD
OUT _{R×5VT××A}
SERIES
GND
• Detector Threshold Changing Circuit
(Nch Open Drain Output)
VDD
Ra
OUT _{R×5VT××A} VDD
SERIES
+
C
Rb
GND
• Window Comparator Circuit
(Nch Open Drain Output)
VDD
VDD
VDD
R×5VT××A ^OUT
SERIES _VDET1
GND
R×5VT××A ^OUT
SERIES _VDET2
GND
OUT
• Excessive Charge Preventing Circuit
Ra + Rb
Changed Detector Threshold =
· (–VDET )
Rb
Ra + Rb
Hysteresis Voltage =
· VHYS
Rb
(Note) Please note that when the value of Ra becomes excessively large, the detector
threshold detected may differ from the value calculated by use of the above for-
mula.
VDD
VDET1
VDET2
VSS
OUT
VSS
Light
R1
D1
R2
VDD
R4
OUT _{R×5VT××C}
R3
SERIES
VSS
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