Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Reset/power-on reset SOT 23-3

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

falls below the internal V

TH-

and remains asserted

until V

rises above V

+ (V

+ = V

- × 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

♦ Ultra-Low 1.0µA Supply Current

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

Increments

♦ Internal 5% Threshold Hysteresis

♦ ±2.5% Threshold Accuracy Over Temperature

♦ Internal Timeout Period Option (150ms min)

♦ Immune to Short Voltage Transients

♦ No External Components

♦ Available in Three Output Options: Push-Pull

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

Low)

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

♦ Small SC70 and SOT23 Packages

MAX6461–MAX6466

Ultra-Low-Power Voltage Detectors and

µP Supervisory Circuits

________________________________________________________________ Maxim Integrated Products 1

TOP VIEW

(OUT)/OUT

GND

MAX6461–

MAX6466

SC70-3

GND

(OUT)/OUTGND

15V

N.C.

MAX6461–

MAX6466

SOT23-5

GND

MAX6461–

MAX6466

SOT23-3

(OUT)/OUT

( ) ARE FOR THE MAX6462/MAX6465 ONLY

Pin Configurations

Ordering Information

19-2533; Rev 2; 12/05

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.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Summary of content (10 pages)

PAGE 1
9-2533; Rev 2; 12/05 Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits The MAX6461–MAX6466 family of ultra-low-power voltage detectors and µP reset supervisory circuits monitors battery, 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).
PAGE 2
MAX6461–MAX6466 Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND unless otherwise noted.) VCC, Open-Drain OUT..............................................-0.3V to +7V Push-Pull OUT/OUT....................................-0.3V to (VCC + 0.3V) Input/Output Current (all pins) ............................................20mA Output Short Circuit (VCC or GND) Continuous Power Dissipation (TA = +70°C) 3-Pin SC70 (derate 2.
PAGE 3
Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits (VCC = +1.2V to +6V, TA = -40°C to +125°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note1) PARAMETER OUT Output Low (Open Drain or Push-Pull) OUT Output High (Push-Pull) OUT Output Open-Drain Leakage Current OUT Output High (Push-Pull) SYMBOL CONDITIONS VOL MIN 0.3 VCC ≥ 2.5V, ISINK = 4.0mA, OUT asserted 0.3 VOH 0.8 × VCC VCC ≥ 2.5V, ISOURCE = 3.0mA, OUT not asserted 0.8 × VCC VCC ≥ 4.5V, ISOURCE = 8.
PAGE 4
Typical Operating Characteristics (continued) (VCC = 5V, TA = +25°C, unless otherwise noted.) MAXIMUM VCC TRANSIENT DURATION vs.
PAGE 5
Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits PIN NAME MAX6461–MAX6466 SOT23-3 1 SC70-3 FUNCTION SOT23-5 2 OUT Detector Output for the MAX6461/MAX6462/MAX6463: Push-pull (active-low or active-high) and open-drain (active-low) options. OUT is asserted low when the monitored input (VCC) drops below the internal VTH- threshold and remains low until the monitored input exceeds the internal VTH+ threshold.
PAGE 6
MAX6461–MAX6466 Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits Hysteresis IN DC/DC CONVERTER OUT VCC 3.6V Li+ VCC µP MAX6463 MAX6466 OUT SUSPEND Figure 1. Interfacing to Different Logic Voltage Components Applications Information Interfacing to Different Logic Voltage Components The MAX6463 and MAX6466’s active-low, open-drain output versions can be used to interface with a different logic voltage than VCC, as shown in Figure 1.
PAGE 7
Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits MAX6461–MAX6466 Table 1a. MAX6461–MAX6466 Lower Trip Threshold (VTH-) Voltage Options VOLTAGE THRESHOLD, VTHSUFFIX TA = +25°C TA = -40°C to +125°C VTH- (min) VTH- (typ) VTH- (max) VTH- (min) VTH- (max) 16 17 1.576 1.675 1.600 1.700 1.624 1.726 1.560 1.658 1.640 1.743 18 1.773 1.800 1.827 1.755 1.845 19 1.872 1.900 1.929 1.853 1.948 20 21 1.970 2.069 2.000 2.100 2.030 2.132 1.950 2.048 2.050 2.153 22 2.167 2.
PAGE 8
MAX6461–MAX6466 Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits Table 1b. MAX6461–MAX6466 Upper Trip Threshold (VTH+) Voltage Options VOLTAGE THRESHOLD, VTH+ SUFFIX 8 VTH+ (min) TA = +25°C VTH+ (typ) VTH+ (max) TA = -40°C to +125°C VTH+ (min) VTH+ (max) 16 1.647 1.672 1.697 1.630 1.714 17 1.750 1.777 1.803 1.732 1.821 18 19 1.853 1.956 1.881 1.986 1.909 2.015 1.834 1.936 1.928 2.035 20 2.059 2.090 2.121 2.038 2.142 21 2.162 2.195 2.227 2.140 2.249 22 23 2.
PAGE 9
Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits MAX6461–MAX6466 Table 2.
PAGE 10
MAX6461–MAX6466 Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX6463XR_ _-T -40°C to +125°C 3 SC70-3 MAX6463UR_ _-T -40°C to +125°C 3 SOT23-3 MAX6463UK_ _-T -40°C to +125°C 5 SOT23-5 MAX6464XR_ _-T -40°C to +125°C 3 SC70-3 MAX6464UR_ _-T -40°C to +125°C 3 SOT23-3 MAX6464UK_ _-T -40°C to +125°C 5 SOT23-5 MAX6465XR_ _-T -40°C to +125°C 3 SC70-3 MAX6465UR_ _-T -40°C to +125°C 3 SOT23-3 MAX6465UK_ _-T -40°