Motor de Búsqueda de Datasheet de Componentes Electrónicos
Selected language     Spanish  ▼

Delete All
ON OFF
ALLDATASHEET.ES

X  

Preview PDF Download HTML

BU4816G-TR Datasheet(PDF) 10 Page - Rohm

No. de Pieza. BU4816G-TR
Descripción  Low Voltage Standard CMOS Voltage Detector ICs
Descarga  16 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricante  ROHM [Rohm]
Página de inicio  http://www.rohm.com
Logo 

BU4816G-TR Datasheet(HTML) 10 Page - Rohm

Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
Datasheet
10/13
BU48xx series
BU49xx series
TSZ02201-0R7R0G300060-1-2
© 2014 ROHM Co., Ltd. All rights reserved.
03.Feb.2014 Rev.010
www.rohm.com
TSZ22111・15・001
●Application Information
Explanation of Operation
For both the open drain type(Fig.12)and the CMOS output type(Fig.13), the detection and release voltages are used as
threshold voltages. When the voltage applied to the VDD pins reaches the applicable threshold voltage, the VOUT terminal
voltage switches from either “High” to “Low” or from “Low” to “High”. Because the BU48xx series uses an open drain output
type, it is possible to connect a pull-up resistor to VDD or another power supply [The output “High” voltage (VOUT) in this
case becomes VDD or the voltage of the other power supply].
Fig.12 (BU48xx type internal block diagram)
Fig.13 (BU49xx type internal block diagram)
Reference Data
Examples of Output rising value(tPLH)and Output falling value(tPHL)
Part Number
tPLH[µs]
tPHL[µs]
BU4845
23.3
275.9
BU4945
3.5
354.3
VDD=4.3V
5.1V
VDD=5.1V
4.3V
* This data is for reference only.
This figure will vary with the application, so please confirm actual operation conditions before use.
Timing Waveforms
Example:The following shows the relationship between the input voltage VDD, the CT Terminal Voltage VCT and the output
voltage VOUT when the input power supply voltage VDD is made to sweep up and sweep down (The circuits are those in
Fig.12 and 13).
①When the power supply is turned on, the output is unsettled
from after over the operating limit voltage (VOPL) until tPHL.
Therefore it is possible that the reset signal is not outputted
when the rise time of VDD is faster than tPHL.
②When VDD is greater than VOPL but less than the reset release
voltage (VDET + VDET), output (VOUT) voltages will switch to L.
③If VDD exceeds the reset release voltage (VDET + VDET), then
VOUT switches from L to H (with a delay of tPLH).
④If VDD drops below the detection voltage (VDET) when the
power supply is powered down or when there is a power
supply fluctuation, VOUT switches to L (with a delay of tPHL).
⑤The potential deference between the detection voltage and the
release voltage is known as the hysteresis width (VDET). The
system is designed such that the output does not flip-flop with
power
supply
fluctuations
within
this
hysteresis
width,
preventing malfunctions due to noise.
Q1
Vref
R1
R2
R3
VOUT
VDD
GND
RL
VDD
RESET
Q2
Q1
Vref
R1
R2
R3
VOUT
VDD
GND
RESET
VDD
VDET+ΔVDET
VDET
VOPL
0V
tPHL
VOUT
tPLH
tPHL
tPLH
VOL
VOH
Fig.14
Timing Waveforms


Html Pages

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


Datasheet Download




Enlace URL




Privacy Policy
ALLDATASHEET.ES
Does ALLDATASHEET help your business so far?  [ DONATE ]  

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Favorito   |   Intercambio de Enlaces   |   Lista de Fabricantes
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