Microprocessor and Non-Volatile

Memory Supervisory Circuits

_______________________________________________________________________________________

9

MAX792

MAX820

INTERNAL/

EXTERNAL

MODE

CONTROL

CHIP-ENABLE

OUTPUT

CONTROL

RESET

GENERATOR

TIMEBASE FOR

RESET AND

WATCHDOG

WATCHDOG

TIMER

WATCHDOG

TRANSITION

DETECTOR

OVERVOLTAGE

COMPARATOR

P

N

INTERNAL

EXTERNAL

60mV

1.30V

LOW-LINE

COMPARATOR

MANUAL

RESET

COMPARATOR

RESET

COMPARATOR

P

*

4

5

9

14

8

11

7

6

15

16

13

10

1

2

3

RESET

RESET

LOW LINE

CE OUT

WDPO

WDO

OVO

12

GND

OVI

WDI

SWT

CE IN

MR

LLIN/

REFOUT

RESET IN/

INT

* SWITCHES ARE SHOWN IN INTERNAL

THRESHOLD MODE POSITION

Figure 1. Block Diagram