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BD37A19FVM Fiches technique(PDF) 3 Page - Rohm

No de pièce BD37A19FVM
Description  Voltage Detector ICs with Watchdog Timer
Download  11 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
Logo ROHM - Rohm

BD37A19FVM Fiches technique(HTML) 3 Page - Rohm

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Technical Note
3/10
www.rohm.com
2010.12 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
BD37A19FVM, BD37A41FVM, BD87A28FVM, BD87A29FVM,
BD87A34FVM, BD87A41FVM, BD99A41F
Electrical characteristics (Unless otherwise specified, Ta = −40℃ to 105℃, VDD = 5 V)
Parameter
Symbol
Limits
Unit
Conditions
Min.
Typ.
Max.
[Overall]
Total supply current 1
(during WDT operation)
IDD1
5
14
µA
INH : WDT ON Logic Input
CTW = 0.1 µF
Total supply current 2
(when WDT stopped)
IDD2
5
14
µA
INH : WDT OFF Logic Input
Output leak current
Ileak
1
µA
VDD = VDS = 10 V
Output current capacity
IOL
0.7
mA
VDD = 1.2 V, VDS = 0.5 V
[RESET]
Detection
voltage 1
1.9V Detect
VDET1
1.871
1.900
1.929
V
Ta = 25℃
2.8V Detect
VDET1
2.758
2.800
2.842
V
Ta = 25℃
2.9V Detect
VDET1
2.886
2.930
2.974
V
Ta = 25℃
3.4V Detect
VDET1
3.349
3.400
3.451
V
Ta = 25℃
4.1V Detect
VDET1
4.039
4.100
4.162
V
Ta = 25℃
Detection
voltage 2
1.9V Detect
VDET2
1.852
1.900
1.948
V
Ta = −40 to 105℃
2.8V Detect
VDET2
2.730
2.800
2.870
V
Ta = −40 to 105℃
2.9V Detect
VDET2
2.857
2.930
3.003
V
Ta = −40 to 105℃
3.4V Detect
VDET2
3.315
3.400
3.485
V
Ta = −40 to 105℃
4.1V Detect
VDET2
4.007
4.100
4.202
V
Ta = −40 to 105℃
Hysteresis
width
1.9V Detect
Vrhys
VDET × 0.03 VDET × 0.13 VDET × 0.19
V
Ta = −40 to 105℃
2.8V Detect
Vrhys
VDET × 0.018 VDET × 0.045 VDET × 0.060
V
Ta = −40 to 105℃
2.9V Detect
Vrhys
VDET × 0.02 VDET × 0.05 VDET × 0.06
V
Ta = −40 to 105℃
3.4V Detect
Vrhys
VDET × 0.02 VDET × 0.05 VDET × 0.07
V
Ta = −40 to 105℃
4.1V Detect
Vrhys
VDET × 0.018 VDET × 0.035 VDET × 0.050
V
Ta = −40 to 105℃
RESET transmission
delay time: low
 high
TPLH
3.9
6.9
10.1
ms
CT = 0.001 µF
*1
When VDD = VDET
0.5 V
Delay circuit resistance
Rrst
5.8
10.0
14.5
VCT = GND
Delay pin threshold voltage
VCTH
VDD × 0.3 VDD × 0.45 VDD × 0.6
V
RL = 470 KΩ
Delay pin output current
ICT
150
µA
VDD = 1.50 V, VCT = 0.5 V
Min. operating voltage
VOPL
1.0
V
VOL ≤ 0.4 V, RL = 470 KΩ
[WDT]
WDT monitor time
TwH
7.0
10.0
20.0
ms
CTW = 0.01 µF
*2
WDT reset time
TwL
2.4
3.3
7.0
ms
CTW = 0.01 µF
*3
Clock input pulse width
TWCLK
500
ns
CLK high threshold voltage
VCLKH
VDD × 0.8
VDD
V
CLK low threshold voltage
VCLKL
0
VDD × 0.3
V
CLK high threshold voltage
VINHH
VDD × 0.8
VDD
V
CLK low threshold voltage
VINHL
0
VDD × 0.3
V
CTW charge current
ICTWC
0.25
0.50
0.75
µA
VCTW = 0.2 V
CTW discharge current
ICTWO
0.75
1.50
2.00
µA
VCTW = 0.8 V
*1
TPLH can be varied by changing the CT capacitance value.
TPLH (s)
 0.69 × Rrst (MΩ) × CT (µF) Rrst = 10 MΩ
(Typ.)
*2
TwH can be varied by changing the CT capacitance value.
TwH (s)
 (0.5 × CTW (µF))/ICTWC (µA)ICTWC = 0.5 µA
(Typ.)
*3
TwL can be varied by changing the CTW capacitance value.
TwL (s)
 (0.5 × CTW (µF))/ICTWO (µA) ICTWO = 1.5 µA
(Typ.)
Note: This IC is not designed to be radiation-resistant.


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