REV. 0

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a

ADM6315

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

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© Analog Devices, Inc., 1999

Open-Drain Microprocessor

Supervisory Circuit in 4-Lead SOT-143

FUNCTIONAL BLOCK DIAGRAM

DEBOUNCE

RESET

CIRCUITRY

ADM6315

MR

GND

RESET

FEATURES

Superior Upgrade for MAX6315

Specified Over Temperature

Low Power Consumption (5

A Typ)

Precision Voltage Monitor of Voltages from 2.5 V to

5 V at 100 mV Increments

Built-In Manual Reset

Pin Compatible with the ADM811

APPLICATIONS

Microprocessor Systems

Controllers

Intelligent Instruments

Automotive Systems

Safety Systems

Portable Instruments

ADM6315

MR

RESET

GND

RESET

GND

P

SYSTEM

10k

SYSTEM POWER

Figure 1. Typical Operating Circuit

GENERAL DESCRIPTION

The ADM6315 is a reliable voltage monitoring device that is

suitable for use in most voltage monitoring applications.

The ADM6315 is designed to monitor as little as a 1.8% degra-

dation of a power supply voltage. Voltages that can be moni-

tored by the ADM6315 are all voltages (at 100 mV increments)

from 2.5 V to 5 V.

Included in this circuit is a debounced Manual Reset input.

Reset can be activated using an ordinary switch (pulling

MR

low), by a low input from another digital device or by a degra-

dation of the supply voltage. The manual reset function is very

useful, especially if the circuit in which the ADM6315 is oper-

ating, enters into a state that can only be detected by the user.

Allowing the user to manually reset a system can reduce the

damage or danger that could be otherwise caused by an out of

control or locked-up system.

The ADM6315 comes in a cost and space efficient SOT-143

package.