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AS1916 - AS1918

Datasheet - Detailed Descr i pti on

8 Detailed Description

The AS1916 - AS1918 supervisory circuits were designed to generate a reset when the monitored supply voltage falls below its factory-trimmed

The integrated watchdog timer (see Watchdog Input on page 8) helps mitigate against bad programming code or clock signals, and/or poor

peripheral response.

The active-low manual reset input (see Manual Reset Input on page 8) allows for an externally activated system reset.

8.1 RESET/RESETN

Whenever the monitored supply voltage falls below its reset threshold, the RESET output asserts low or the RESETN output asserts high. Once

RESET/RESETN output returns to its original state (see Figure 10).

Figure 10. Reset Timing Diagram

AS1916 - AS1918

Reset Timeout Delay

Generator

Watchdog Transition

Detector

Watchdog

Timer

+

–

1.26V

2

GND

5

VCC

4

WDI

1

RESETN/

RESET

3

MRN

1V

VCC

RESETN

RESET

GND

1V