Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

MAX6746KA46 Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # MAX6746KA46
Description  uP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX6746KA46 Datasheet(HTML) 7 Page - Maxim Integrated Products

Back Button MAX6746KA46 Datasheet HTML 3Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 4Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 5Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 6Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 7Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 8Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 9Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 10Page - Maxim Integrated Products MAX6746KA46 Datasheet HTML 11Page - Maxim Integrated Products Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 14 page
background image
Detailed Description
The MAX6746–MAX6753 assert a reset signal whenever
the VCC supply voltage or RESET IN falls below its reset
threshold. The reset output remains asserted for the
reset timeout period after VCC and RESET IN rise above
its respective reset threshold. A watchdog timer triggers
a reset pulse whenever a watchdog fault occurs.
The reset and watchdog delays are adjustable with
external capacitors. The MAX6746–MAX6751 contain a
watchdog select input that extends the watchdog time-
out period to 128x.
The MAX6752 and MAX6753 have a sophisticated
watchdog timer that detects when the processor is run-
ning outside an expected window of operation. The
watchdog signals a fault when the input pulses arrive too
early (faster that the selected tWD1 timeout period) or too
late (slower than the selected tWD2 timeout period) (see
Figure 1).
Reset Output
The reset output is typically connected to the reset input
of a µP. A µP’s reset input starts or restarts the µP in a
known state. The MAX6746–MAX6753 µP supervisory
circuits provide the reset logic to prevent code-execu-
tion errors during power-up, power-down, and
brownout conditions (see the
Typical Operating Circuit).
RESET changes from high to low whenever the moni-
tored voltage, RESET IN and/or VCC drop below the
reset threshold voltages. Once VRESET IN and/or VCC
exceeds its respective reset threshold voltage(s),
RESET remains low for the reset timeout period, then
goes high.
RESET is guaranteed to be in the correct logic state for
VCC greater than 1V. For applications requiring valid
reset logic when VCC is less than 1V, see the section
Ensuring a Valid RESET Output Down to VCC = 0V.
RESET IN Threshold
The MAX6748–MAX6751 monitor the voltage on RESET IN
using an adjustable reset threshold (VRESET IN) set with
an external resistor voltage-divider (Figure 2). Use the
following formula to calculate the externally monitored
voltage (VMON_TH):
VMON_TH = VRESET IN x (R1 + R2) / R2
µP Reset Circuits with Capacitor-Adjustable
Reset/Watchdog Timeout Delay
_______________________________________________________________________________________
7
WDI CONDITION 1
WDI CONDITION 2
WDI CONDITION 3
GUARANTEED TO
NOT ASSERT
RESET
GUARANTEED TO
ASSERT
RESET
tWD1 (MIN) tWD1 (MAX)
*UNDETERMINED
*UNDETERMINED
FAST FAULT
NORMAL OPERATION
SLOW FAULT
*UNDETERMINED STATES MAY OR MAY NOT GENERATE A FAULT CONDITION
GUARANTEED
TO ASSERT
RESET
tWD2 (MIN) tWD2 (MAX)
Figure 1. MAX6752/MAX6753 Detailed Watchdog Input Timing Relationship
MAX6748
MAX6749
MAX6750
MAX6751
RESET IN
GND
VCC
VCC
VMON_TH
VMON_TH = 1.235 x (R1 + R2) / R2
R1
R2
Figure 2. Calculating the Monitored Threshold Voltage
(VMON_TH)


Similar Part No. - MAX6746KA46

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX6746KA46 MAXIM-MAX6746KA46 Datasheet
214Kb / 14P
   UP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
19-2530; Rev 2; 8/03
MAX6746KA46 MAXIM-MAX6746KA46 Datasheet
176Kb / 14P
   μP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
Rev 6; 4/11
More results

Similar Description - MAX6746KA46

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX6746 MAXIM-MAX6746 Datasheet
214Kb / 14P
   UP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
19-2530; Rev 2; 8/03
MAX6746 MAXIM-MAX6746_11 Datasheet
176Kb / 14P
   μP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
Rev 6; 4/11
MAX6747KA46-T MAXIM-MAX6747KA46-T Datasheet
176Kb / 14P
   μP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
Rev 6; 4/11
MAX6753KA29-T MAXIM-MAX6753KA29-T Datasheet
176Kb / 14P
   μP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
Rev 6; 4/11
MAX6746 MAXIM-MAX6746_V01 Datasheet
1Mb / 16P
   關P Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay
2019
logo
SG Micro Corp
SGM804 SGMICRO-SGM804 Datasheet
264Kb / 11P
   Capacitor-Adjustable Reset Timeout Delay
SGM800 SGMICRO-SGM800 Datasheet
280Kb / 11P
   Capacitor-Adjustable Reset Timeout Delay
SGM802 SGMICRO-SGM802 Datasheet
291Kb / 12P
   Capacitor-Adjustable Reset Timeout Delay
logo
Maxim Integrated Produc...
MAX6412 MAXIM-MAX6412 Datasheet
190Kb / 12P
   Low-Power, Single/Dual-Voltage uP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
19-2336; Rev 1; 8/03
MAX6414UK26T MAXIM-MAX6414UK26T Datasheet
193Kb / 12P
   Low-Power, Single/Dual-Voltage uP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay
Rev 5; 8/12
More results


Html Pages

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


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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