MAX6418UK-T datasheet(7/12 Pages) MAXIM

Part #	MAX6418UK-T

Description	Low-Power, Single/Dual-Voltage 關P Reset Circuits with Capacitor-Adjustable Reset Timeout Delay

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Manufacturer	MAXIM [Maxim Integrated Products]

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monitor voltages other than VCC. Calculate VMON_TH as

shown in the

Reset Threshold section. (See Figure 3.)

Dual-Voltage Monitoring

(MAX6418/MAX6419/MAX6420)

The MAX6418/MAX6419/MAX6420 contain both facto-

ry-trimmed threshold voltages and an adjustable reset

threshold input, allowing the monitoring of two voltages,

VCC and VMON_TH (see Figure 4). Reset is asserted

when either of the voltages falls below its respective

threshold voltage.

Application Information

Selecting a Reset Capacitor

The reset timeout period is adjustable to accommodate

a variety of µP applications. Adjust the reset timeout

period (tRP) by connecting a capacitor (CSRT) between

SRT and ground. Calculate the reset timeout capacitor

as follows:

CSRT = (tRP - 275µs) / (2.73 106)

where tRP is in seconds and CSRT is in Farads

Low-Power, Single/Dual-Voltage µP Reset Circuits

with Capacitor-Adjustable Reset Timeout Delay

_______________________________________________________________________________________

7

RESET

CIRCUITRY

LASER-TRIMMED

RESISTORS

VCC

1.26V

RESET IN

GND

R1

R2

SRT

CSRT

(RESET)

RESET

VMON_TH

MAX6418

MAX6419

MAX6420

ONLY

RL

µP

Figure 4. MAX6418/MAX6419/MAX6420 Monitoring Two Voltages

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MAX6418UK-T Datasheet(PDF) 7 Page - Maxim Integrated Products

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