BD37A19FVM_10 ROHM [Rohm], BD37A19FVM_10 Datasheet - Page 5

• Manufacturer Part Number: BD37A19FVM_10
• Description: Voltage Detector ICs with Watchdog Timer
• Manufacturer: ROHM [Rohm]

●Block diagram
●Pin assignments
© 2010 ROHM Co., Ltd. All rights reserved.
BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM,
BD87A34FVM, BD87A41FVM, BD99A41F
CTW
VDD
CLK
www.rohm.com
CT
1
2
3
4
No.
Pulse
generation
circuit
1
2
3
4
5
6
7
8
RESET Reset output pin
name
CTW
GND
VDD
CLK
N.C.
INH
Pin
CT
Vref
+
Clock input from microcontroller
Reset delay time setting capacitor
connection pin
WDT time setting capacitor connection pin
Power supply pin
NC pin
GND pin
WDT on/off setting pin
INH=H/L:WDT=ON/OFF
R
S
VthH
BD37A□□FVM
+
Q
BD37A□□FVM
VthL
VDD
+
VDD
R
S
Function
Q
CTW pin capacitor: 0.001 µF to 10 µF
CT pin capacitor: 470 pF to 3.3 µF
5
8
7
6
GND
RESET
INH
N.C.
8 7 6 5
1 2 3 4
Fig.13
Fig.14
5/10
No.
1
2
3
4
5
6
7
8 RESET Reset output pin
CTW
CLK
GND
CT
name
1
2
3
4
CTW
GND
VDD
CLK
N.C.
INH
Pin
CT
Pulse
generation
circuit
WDT time setting capacitor connection pin
Reset delay time setting capacitor
connection pin
Clock input from microcontroller
GND pin
Power supply pin
WDT on/off setting pin
INH=H/L:WDT=OFF/ON(BD87A□□FVM)
INH=H/L:WDT=ON/OFF(BD99A41F)
NC pin
BD87A□□FVM / BD99A41F
BD87A□□FVM / BD99A41F
Vref
+
R
S
VthH
+
Q
VthL
Function
VDD
+
VDD
R
S
Q
Technical Note
2010.12 - Rev.A
8
7
6
5
INH
RESET
N.C.
VDD