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BD37A41FVM-TR Datasheet(PDF) 2 Page - Rohm

Part # BD37A41FVM-TR
Description  Voltage Detector ICs with Watchdog Timer Built-in watchdog timer
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD37A41FVM-TR Datasheet(HTML) 2 Page - Rohm

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BD37Axx Series
BD87Axx Series
BD99A41F
Datasheet
TSZ02201-0T2T0AN00130-1-2
© 2013 ROHM Co., Ltd. All rights reserved.
25.Apr.2013 Rev.002
www.rohm.com
TSZ22111・15・001
●Pin Configurations
Figure 1. Pin Configurations
●Pin Descriptions
BD37AxxFVM
BD87AxxFVM / BD99A41F
No.
Pin
name
Function
No.
Pin
name
Function
1
CLK
Clock input from microcontroller
1
CTW
WDT time setting capacitor connection pin
2
CT
Reset delay time setting capacitor
connection pin
2
CT
Reset delay time setting capacitor
connection pin
3
CTW
WDT time setting capacitor connection pin
3
CLK
Clock input from microcontroller
4
VDD
Power supply pin
4
GND
GND pin
5
N.C.
NC pin
5
VDD
Power supply pin
6
GND
GND pin
6
INH
WDT ON/OFF setting pin
INH=H/L:WDT=OFF/ON(BD87AxxFVM)
INH=H/L:WDT=ON/OFF(BD99A41F)
7
INH
WDT ON/OFF setting pin
INH=H/L:WDT=ON/OFF
7
N.C.
NC pin
8
RESET Reset output pin
8
RESET Reset output pin
●Block Diagrams
BD37AxxFVM
BD87AxxFVM / BD99A41F
CT pin capacitor: 470pF to 3.3µF
CTW pin capacitor: 0.001µF to 10µF
Figure 2.Block Diagrams
MSOP8
(TOP VIEW)
1 2 3 4
8 7 6 5
SOP8
(TOP VIEW)
12
3
4
87
65
RESET
INH
Vref
VDD
GND
N.C.
VDD
VthH
VthL
R
S
Q
R
S
Q
+
+
+
CLK
CT
CTW
VDD
1
2
3
4
8
7
6
5
Pulse
Generation
Circuit
Pulse
Generation
Circuit
CTW
CT
CLK
GND
RESET
N.C.
Vref
VDD
INH
VDD
VDD
VthH
VthL
R
S
Q
R
S
Q
1
2
3
4
5
6
7
8
+
+
+


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