|
|
 |
|
Product folder
V6155
(obsolete, please use EM6151) Windowed Watchdog IC with Compatible CAN Bus Sleep Function |
|
|
|
| |
| General description |
The V6155 offers a high level of integration by voltage monitoring and software monitoring in an 8 lead package. Comparator monitors the voltage applied at the VIN input comparing it with an internal 1.275V reference. The power-on reset function is initialized after VIN reaches 1.275 V and takes the reset output inactive after TPOR depending of external resistance. The reset output goes active low when the voltage VIN is less than 1.275 V. The /RES and /EN outputs are guaranteed to be in a correct state for a supply voltage as low as 1.2V. The watchdog function monitors software cycle time and execution. If the software clears the watchdog too quickly (incorrect cycle time) or too slowly (incorrect execution) it will cause the system to be reset. The system enable output prevents critical control functions being activated until software has successfully cleared the watchdog three times. Such a security could be used to prevent motor controls being energized on repeated resets of a faulty system. If the microcontroller does not work that means no signal on the /TCL input the V6155 goes in a standby mode (CAN-bus sleep detector).
|
| |
| Features |
• Can-bus sleep mode detector
• Standby mode, maximum current 50mA
• Reset output guaranteed for VDD voltage down to 1.2V
• Comparator for voltage monitoring, voltage reference 1.275V
• ±2% voltage reference accuracy at +25°C
• ±2.7% voltage reference accuracy from -40 to +85°C (3 to 5.5V)
• Programmable reset voltage monitoring
• Programmable power-on reset (POR) delay
• Watchdog with programmable time windows guarantees a minimum time and a maximum time between software clearing of the watchdog (windowed watchdog, window watchdog)
• Time base accuracy ±10%
• System enable output offers added security
• TTL / CMOS compatible
• -40 to +85°C temperature range
• On request extended temperature range, -40 to +125°C
• DIP8 and SO8 packages
|
| |
| Applications |
Automotive systems
Cellular telephones
Security systems
Battery powered products
High efficiency linear power supplies
Industrial electronics
|
| |
| Applications notes |
| • Windowed watchdog enhances security in automotive and industrial applications |
 |
AN602
144 Kb |
|
| • Basic principles for using EM Supervisory ICs in noisy environment |
|
|
AN600
45 Kb |
|
|
|
|
|
|
|
