General Description

The MAX6461–MAX6466 family of ultra-low-power voltage

detectors and µP reset supervisory circuits monitors bat-

tery, power-supply, and system voltages. Each circuit

includes a precision bandgap reference, a comparator,

internally trimmed resistor networks that set specified trip

thresholds, and an internal 5% threshold hysteresis circuit

(see the Functional Diagram). Output is asserted when

× 1.05). These

devices provide excellent circuit reliability and low cost

by eliminating external components and adjustments

when monitoring nominal system voltages from +1.6V to

+5.5V. The MAX6461/MAX6462/MAX6463 are voltage

detectors with a propagation delay of 17µs.

The MAX6464/MAX6465/MAX6466 are µP supervisory

circuits with a minimum reset timeout period of 150ms. All

devices are available with thresholds from +1.6V to +5.5V

in 100mV increments.

The family is available with three output stage options:

push-pull with active-low output, push-pull with active-

high output, and open drain with active-low output. These

devices are available in SC70 and SOT23 packages

specified over the -40°C to +125°C temperature range.

Applications

Precision Battery Monitoring

Load Switching/Power Sequencing

Power-Supply Monitoring in Digital/Analog

Systems

Noise-Immune µP Reset Circuits

Portable/Battery-Powered Equipment

Cellular Phones/Cordless Phones

PDAs

Portable Medical Devices

Features

o Ultra-Low 1.0µA Supply Current

o Preset Thresholds from +1.6V to +5.5V in 100mV

Increments

o Internal 5% Threshold Hysteresis

o ±2.5% Threshold Accuracy Over Temperature

o Internal Timeout Period Option (150ms min)

o Immune to Short Voltage Transients

o No External Components

o Available in Three Output Options: Push-Pull

(Active Low/Active High) and Open Drain (Active

Low)

o Fully Specified from -40°C to +125°C

o Small SC70 and SOT23 Packages

Ultra-Low-Power Voltage Detectors and

µP Supervisory Circuits

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

(OUT)/OUT

1

GND

MAX6461–

MAX6466

SC70-3

2

GND

(OUT)/OUT

GND

15

N.C.

MAX6461–

MAX6466

SOT23-5

2

34

GND

1

MAX6461–

MAX6466

SOT23-3

2

(OUT)/OUT

( ) ARE FOR THE MAX6462/MAX6465 ONLY

Pin Configurations

Ordering Information

19-2533; Rev 1; 1/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-PACKAGE

MAX6461XR_ _-T

-40°C to +125°C

3 SC70-3

MAX6461UR_ _-T

-40°C to +125°C

3 SOT23-3

MAX6461UK_ _-T

-40°C to +125°C

5 SOT23-5

MAX6462XR_ _-T

-40°C to +125°C

3 SC70-3

MAX6462UR_ _-T

-40°C to +125°C

3 SOT23-3

MAX6462UK_ _-T

-40°C to +125°C

5 SOT23-5

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

The MAX6461–MAX6466 are available in factory-set thresholds

from 1.6V to 5.5V in approximately 100mV increments. Choose

the desired voltage threshold suffix from Table 1 and insert it in

the blank spaces in the part number. There are 30 standard ver-

sions with a required order increment of 2500 pieces. Sample

stock generally is held on the standard versions only (Table 2).

Nonstandard versions require a 10k-piece order increment.

Contact factory for availability. All devices available in tape-and-

reel only.