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RE5VL20AABF View Datasheet(PDF) - RICOH Co.,Ltd.

Part NameDescriptionManufacturer
RE5VL20AABF Voltage detector. Detector threshold. Output type CMOS. Antistatic bag. Ricoh
RICOH Co.,Ltd. Ricoh
RE5VL20AABF Datasheet PDF : 29 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
R ×5VL
OPERATION
Ra
+
Rb
Tr.1
Rc
FIG. 1 Block Diagram
VDD
Pch
OUT
Nch
GND
· In R×5VL××A, Nch Tr. drain is con-
nected to OUT pin.
· In R×5VL××C, Nch Tr. drain and
Pch Tr. drain are connected to
OUT pin.
Operation Diagram
12
3
45
Supply Volage
(VDD)
Released Volage +VDET
Detected Volage –VDET
Minimum Operating Volage
GND
B
A Detector Threshold Hysteresis
Output Volage
(OUT)
GND
tPLH
FIG. 2 Operation Diagram
Step
Step 1 Step 2 Step 3 Step 4 Step 5
Comparator(+)Pin
Input Voltage
I II
II
II I
Comparator Output H L Indefinite L H
Tr. 1
OFF ON Indefinite ON OFF
Pch ON OFF Indefinite OFF ON
Output Tr.
Nch OFF ON Indefinite ON OFF
I.
Rb + Rc ·VDD
Ra + Rb + Rc
II.
Rb ·VDD
Ra + Rb
Step 1. Output Voltage is equal to Power Source Voltage (VDD).
Step 2. When Input Voltage to Comparator reaches the state of Vref VDD·(Rb+Rc)/(Ra+Rb+Rc)at Point A (Detected Voltage –VDET), the output of Com-
parator is reserved, so that Output Voltage becomes GND.
Step 3. In the case of CMOS Output, Output Voltage becomes unstable when Supply Voltage (VDD) is smaller than Minimum Operating Voltage. In the
case of Nch Open Drain Output, a pulled-up voltage is output.
Step 4. Output Voltage becomes equal to GND.
Step 5. When Input Voltage to Comparator reaches the state of VrefVDD·(Rb)/(Ra+Rb) at Point B (Released Voltage +VDET), the output of Comparator is reserved,
so that Output Voltage becomes equal to Supply Voltage (VDD)
14
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