MAX812 View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX812

4-Pin µP Voltage Monitors with Manual Reset Input

Maxim Integrated 

4-Pin µP Voltage Monitors

with Manual Reset Input

Interfacing to µPs with

Bidirectional Reset Pins

µPs with bidirectional reset pins (such as the Motorola

68HC11 series) can contend with the MAX811/MAX812

reset outputs. If, for example, the MAX811 RESET out-

put is asserted high and the µP wants to pull it low,

indeterminate logic levels may result. To correct such

cases, connect a 4.7kΩ resistor between the MAX811

RESET (or MAX812 RESET) output and the µP reset I/O

(Figure 3). Buffer the reset output to other system com-

ponents.

___________________Chip Information

TRANSISTOR COUNT: 341

VCC

MAX811

4.7k

RESET

GND

BUFFER

VCC

μP

RESET

BUFFERED RESET

TO OTHER SYSTEM

COMPONENTS

GND

Figure 3. Interfacing to µPs with Bidirectional Reset I/O

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