поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

BD37A19FVM датащи(PDF) 8 Page - Rohm

номер детали BD37A19FVM
подробное описание детали  Voltage Detector ICs with Watchdog Timer Built-in watchdog timer
Download  18 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  ROHM [Rohm]
домашняя страница  http://www.rohm.com
Logo ROHM - Rohm

BD37A19FVM датащи(HTML) 8 Page - Rohm

Back Button BD37A19FVM Datasheet HTML 4Page - Rohm BD37A19FVM Datasheet HTML 5Page - Rohm BD37A19FVM Datasheet HTML 6Page - Rohm BD37A19FVM Datasheet HTML 7Page - Rohm BD37A19FVM Datasheet HTML 8Page - Rohm BD37A19FVM Datasheet HTML 9Page - Rohm BD37A19FVM Datasheet HTML 10Page - Rohm BD37A19FVM Datasheet HTML 11Page - Rohm BD37A19FVM Datasheet HTML 12Page - Rohm Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 18 page
background image
8/15
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
●Timing chart
Figure 15. Timing Chart
●Explanation
The RESET pin voltage (RESET) switches to low when the power supply voltage (VDD) falls to 0.8 V.
The external capacitor connected to the CT pin begins to charge when VDD rises above the reset detection voltage
(VDETH). The RESET signal stays low until VDD reaches the VDETH voltage and switches to high when VDD reaches
or exceeds the VDETH voltage. The RESET transmission delay time TPLH allowed to elapse before RESET switches
from low to high is given by the following equation:
TPLH (s)
 0.69 × Rrst × CT (µF)   [1]
Rrst denotes the IC's built-in resistance and is designed to be 10 M
Ω (Typ.). CT denotes the external capacitor
connected to the CT pin.
The external capacitor connected to the CTW pin begins to charge when RESET rises, triggering the watchdog timer.
The CTW pin state switches from charge to discharge when the CTW pin voltage (VCTW) reaches VthH, and RESET
switches from high to low. The watchdog timer monitor time TWH is given by the following equation:
TWH (s)
 (0.5 × CTW (µF))/(ICTWC)   [2]
ICTWC denotes the CTW charge current and is designed to be 0.50 µA (Typ.). CTW denotes the external capacitor
connected to the CTW pin.
The CTW pin state switches from charge to discharge when VCTW reaches VthL, and RESET switches from low to
high. The watchdog timer reset time TWL is given by the following equation:
TWL (s)
 (0.5 × CTW (µF))/(ICTWO)   [3]
ICTWO denotes the CTW discharge current and is designed to be 1.50 µA (Typ.).
The CTW pin state may not switch from charge to discharge when the CLK input pulse width TWCLK is short. Use a
TWCLK input pulse width of at least 500 ns.
TWCLK
≥ 500 ns (Min.)
When a pulse (positive edge trigger) of at least 500 ns is input to the CLK pin while the CTW pin is charging, the CTW
state switches from charge to discharge. Once it discharges to VthL, it will charge again.
⑧ Watchdog timer operation is forced off when the INH pin switches to low (L: BD37Axx Series. BD99A41F, H:
BD87AxxSeries). At that time, only the watchdog timer is turned off. Reset detection is performed normally.
The watchdog timer function turns on when the INH pin switches to high(H: BD37Axx Series. BD99A41F, L:
BD87AxxSeries). The external capacitor connected to the CTW pin begins to charge at that time.
RESET switches from high to low when VDD falls to the RESET detection voltage (VDET) or lower.
When VDD falls to 0 V, the RESET signal stays low until VDD reaches 0.8 V.
*2
(BD37AxxFVM/BD99A41F)
④ ⑤⑧
⑤ ⑩ ②
④ ⑤
INH
VCTW
CLK
RESET
①②③
0
0
0
0
0
WDT circuit turns off when INH is high
TWCLK
*4 TWCLK
VthH
VthL
*1
TPLH
*3
TWL
TWH
VCT VCTH
INH
VDD
VDETH
VDET
WDT circuit turns off when INH is low
0
0
VDETH=VDET+Vrhys
(BD87AxxFVM)


Аналогичный номер детали - BD37A19FVM

производительномер деталидатащиподробное описание детали
logo
Rohm
BD37A19FVM ROHM-BD37A19FVM Datasheet
321Kb / 6P
   Voltage Detector with Watchdog Timer
BD37A19FVM ROHM-BD37A19FVM Datasheet
468Kb / 11P
   Voltage Detector ICs with Watchdog Timer
BD37A19FVM-TR ROHM-BD37A19FVM-TR Datasheet
1Mb / 19P
   Voltage Detector ICs with Watchdog Timer
BD37A19FVM ROHM-BD37A19FVM_10 Datasheet
468Kb / 11P
   Voltage Detector ICs with Watchdog Timer
More results

Аналогичное описание - BD37A19FVM

производительномер деталидатащиподробное описание детали
logo
Rohm
BD37A19FVM-TR ROHM-BD37A19FVM-TR Datasheet
1Mb / 19P
   Voltage Detector ICs with Watchdog Timer
BD37A19FVM ROHM-BD37A19FVM_10 Datasheet
468Kb / 11P
   Voltage Detector ICs with Watchdog Timer
BD37A19FVM ROHM-BD37A19FVM Datasheet
321Kb / 6P
   Voltage Detector with Watchdog Timer
BD87A28FVM ROHM-BD87A28FVM Datasheet
322Kb / 6P
   Voltage Detector with Watchdog Timer
BD37A41FVM ROHM-BD37A41FVM Datasheet
322Kb / 6P
   Voltage Detector with Watchdog Timer
BD87A41FVM ROHM-BD87A41FVM Datasheet
321Kb / 6P
   Voltage Detector with Watchdog Timer
BD99A41F ROHM-BD99A41F Datasheet
321Kb / 6P
   Voltage Detector with Watchdog Timer
BD87A29FVM ROHM-BD87A29FVM Datasheet
323Kb / 6P
   Voltage Detector with Watchdog Timer
BD87A34FVM ROHM-BD87A34FVM Datasheet
321Kb / 6P
   Voltage Detector with Watchdog Timer
logo
Megawin Technology Co.,...
MG65L513A MEGAWIN-MG65L513A Datasheet
551Kb / 30P
   Watchdog timer built-in
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com