Electronic Components Datasheet Search |
|
MAX6357MSUT-T Datasheet(PDF) 7 Page - Maxim Integrated Products |
|
MAX6357MSUT-T Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 8 page Watchdog Input (MAX6358/MAX6359/MAX6360) The MAX6358/MAX6359/MAX6360 include a WDI to provide a reset if the µP goes into an infinite loop. After a reset, the start-up timeout period and the initial time- out period is nominally 46.4sec to allow the µP time to initialize. After the first transition on the WDI and after any toggle of the watchdog thereafter, the timeout peri- od is nominally 2.9sec. Applications Information Ensuring a Valid RESET Output Down to VCC = 0 In some systems, it is necessary to ensure a valid reset even if VCC falls to 0. In these applications, use the cir- cuit shown in Figure 3. Note that this configuration does not work for the open-drain outputs of the MAX6352/ MAX6355/MAX6358. Monitoring a Negative Voltage To monitor a negative supply rail using RSTIN or the MAX6355/MAX6356/MAX6357, use the circuit shown in Figure 4. In this configuration, a reset is issued when the negative supply falls below VINTH. Interfacing to µPs with Bidirectional Reset Pins Microprocessors with bidirectional reset pins will con- tend with the push-pull outputs of these devices. To prevent this, connect a 4.7k Ω resistor between RESET and the µP’s reset I/O port, as shown in Figure 5. Buffer RESET as shown in the figure if this reset is used by other components in the system. Dual/Triple-Voltage µP Supervisory Circuits _______________________________________________________________________________________ 7 Figure 4. Monitoring a Negative Voltage Figure 3. Ensuring a Valid Reset Low to VCC5 and VCC3 = 0 +3.3V/+3V +5V GND 100k RST3 RST5 RST MAX6351–MAX6360 VCC3 VCC5 VCC5 VIN R1 R2 RSTIN MAX6355 MAX6356 MAX6357 VCC5 ≥ VRSTIN VINTH = 1.22 - (VCC5 - 1.22) R2 R1 R2 VINR1 VCC5 ≥ - Figure 5. Interfacing to µPs with Bidirectional Reset I/O BUFFERED RESET TO OTHER SYSTEM COMPONENTS 4.7k GND RESET µP GND RST3 RST5 RST MAX6351–MAX6360 VCC3 VCC3 VCC5 VCC5 Chip Information TRANSISTOR COUNT: 855 |
Similar Part No. - MAX6357MSUT-T |
|
Similar Description - MAX6357MSUT-T |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
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 |