Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

TL7702B Fiches technique(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
No de pièce TL7702B
Description  SUPPLY-VOLTAGE SUPERVISORS
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TL7702B Fiches technique(HTML) 10 Page - Texas Instruments

Back Button TL7702B Datasheet HTML 3Page - Texas Instruments TL7702B Datasheet HTML 4Page - Texas Instruments TL7702B Datasheet HTML 5Page - Texas Instruments TL7702B Datasheet HTML 6Page - Texas Instruments TL7702B Datasheet HTML 7Page - Texas Instruments TL7702B Datasheet HTML 8Page - Texas Instruments TL7702B Datasheet HTML 9Page - Texas Instruments TL7702B Datasheet HTML 10Page - Texas Instruments TL7702B Datasheet HTML 11Page - Texas Instruments  
Zoom Inzoom in Zoom Outzoom out
 10 / 11 page
background image
TL7702B, TL7705B
SUPPLY-VOLTAGE SUPERVISORS
SLVS037H – SEPTEMBER 1989 – REVISED JULY 1999
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
VS
10 k
0.1
µF
SENSE
RESIN
GND
REF
RESET
RESET
VCC
CT
To System
RESET
RT
CT
System Supply
Reset Input
(from system)
To System
RESET
(see text)
7
2
1
3
5
6
8
4
10 k
Figure 8. System Reset Controller With Undervoltage Sensing
When the TL770xB SENSE terminal is used to monitor VCC, a current-limiting resistor in series with CT is
recommended. During normal operation, the timing capacitor is charged by the onboard current source to
approximately VCC or an internal voltage clamp (≈7.1-V zener), whichever is less. When the circuit is then subjected
to an undervoltage condition during which VCC is rapidly slewed down, the voltage on CT exceeds that on VCC. This
forward biases a secondary path internally, which falsely activates the outputs. A fault is indicated when VCC drops
below V(CT), not when VSENSE falls below VT–.
Texas Instruments performs a 100% electrical screen to verify that the outputs do not switch with 1 mA forced into
the CT terminal. Adding the external resistor, RT, prevents false triggering. Its value is calculated as follows:
V
(CT) * VT
*
R
T
Where:
V(CT) = VCC or 7.1 V, whichever is less
VT–
= 4.55 V (nom)
RT
= value of series resistor required
For VCC = 5 V:
5
* 4.55
R
T
t 1mA
Therefore,
R
T
u 450 W
Using a 20% tolerance resistor, RT should be greater than 560 Ω.
Adding this series resistor changes the duration of the reset pulse by no more than 10%. RT extends the discharge
of CT, but also skews the V(CT) threshold. These effects tend to cancel one another. The precise percentage change
can be derived theoretically, but the equation is complicated by this interaction and is dependent upon the duration
of the supply-voltage fault condition.
Both outputs of the TL770xB should be terminated with similar value resistors, even when only one is being used.
This prevents unwanted plateauing in either output waveform during switching, which may be interpreted as an
undefined state or delay system reset.


Numéro de pièce similaire - TL7702B

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TL7702B TI-TL7702B Datasheet
340Kb / 17P
[Old version datasheet]   Supply voltage Supervisor
TL7702B TI-TL7702B Datasheet
333Kb / 9P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702B TI-TL7702B Datasheet
138Kb / 9P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702B TI-TL7702B Datasheet
577Kb / 20P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702BC TI-TL7702BC Datasheet
388Kb / 18P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
More results

Description similaire - TL7702B

FabricantNo de pièceFiches techniqueDescription
logo
Texas Instruments
TL7702B TI-TL7702B_06 Datasheet
388Kb / 18P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7759 TI-TL7759_06 Datasheet
257Kb / 12P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7733B TI-TL7733B Datasheet
333Kb / 9P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702A TI-TL7702A Datasheet
140Kb / 10P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702A TI-TL7702A_10 Datasheet
552Kb / 21P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702B TI-TL7702B_08 Datasheet
577Kb / 20P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
TL7702A TI-TL7702A_03 Datasheet
346Kb / 17P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
logo
STMicroelectronics
TL7700A STMICROELECTRONICS-TL7700A Datasheet
50Kb / 7P
   SUPPLY VOLTAGE SUPERVISORS
logo
Texas Instruments
TL7759 TI-TL7759 Datasheet
87Kb / 6P
[Old version datasheet]   SUPPLY-VOLTAGE SUPERVISORS
logo
STMicroelectronics
TL7700 STMICROELECTRONICS-TL7700 Datasheet
67Kb / 7P
   SUPPLY VOLTAGE SUPERVISORS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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