MAX6841_05 MAXIM [Maxim Integrated Products], MAX6841_05 Datasheet

MAX6841_05

Manufacturer Part Number

MAX6841_05

Description

Ultra-Low-Voltage ?P Reset Circuits and Voltage Detectors

Manufacturer

MAXIM [Maxim Integrated Products]

Datasheet

1.MAX6841_05.pdf (9 pages)

Current page: 1 of 9
Download datasheet (579Kb)

The MAX6841–MAX6845 microprocessor (µP) supervi-

sory circuits monitor ultra-low-voltage power supplies in

µP and digital systems. They provide excellent circuit

reliability at low cost by eliminating external compo-

nents and adjustments when used with +0.9V to +1.5V

systems. Factory-trimmed reset thresholds are avail-

able for the MAX6841/MAX6842. The MAX6843/

MAX6844/MAX6845 provide a RESET IN input, allowing

the user to externally adjust the reset threshold. The

MAX6841–MAX6845 family features a debounced man-

ual reset input (MR). The reset comparator is designed

to ignore fast transients on V

The MAX6841–MAX6845 assert a reset signal whenev-

er the V

adjustable threshold or whenever manual reset (MR) is

asserted. Reset remains asserted for a fixed timeout

delay after V

when manual reset is deasserted. Five timeout periods

are available for each part: 150µs (voltage detector ver-

sion), 1.5ms, 30ms, 210ms, and 1.68s (typ).

The MAX6841/MAX6843 have an active-low push-pull

reset output. The MAX6841/MAX6842/MAX6844 have

an active-high push-pull reset output, and the

MAX6842/MAX6845 have an active-low open-drain

reset output. The active-low open-drain reset output

requires a pullup resistor that can be connected to a

voltage from 0 to V

The low supply current (5.7µA) and small package

(SOT23-5) make the MAX6841–MAX6845 ideal for use

in portable equipment.

19-2625; Rev 2; 12/05

Selector Guide and Typical Operating Circuit appear at end

of data sheet.

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.

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

Telecom/Networking Equipment

Basestations

Servers/Workstations

supply voltage declines below a preset or

has risen above the reset threshold and

________________________________________________________________ Maxim Integrated Products

Ultra-Low-Voltage µP Reset Circuits and

General Description

Applications

♦ Factory-Set Reset Threshold Voltages for

♦ Adjustable Threshold RESET IN

♦ Low Power Consumption: 5.7µA (typ)

♦ ±2.5% Reset Threshold Accuracy

♦ Five Timeout Periods: 150µs (Voltage Detector

♦ Available in Three Output Configurations

♦ Guaranteed Reset Valid to V

♦ Manual Reset Input

♦ Immune to Short V

♦ Space-Saving 5-Pin SOT23 Package

Note: Insert desired suffix letter (from the Threshold Suffix Guide

and the Active Timeout Period tables) into the blanks to com-

plete the part number. For example, the MAX6842GUKD1 has a

reset threshold of 1.11V and a typical reset timeout period of

1.5ms. Sample stock is generally available on standard versions

only (see the Standard Versions table). Standard versions

require a minimum order increment of 2.5k units. Nonstandard

versions must be ordered in 10k-unit increments. Contact factory

for availability. All parts are offered 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.

MAX6841_UKD_-T

MAX6842_UKD_-T

MAX6843UKD_-T

MAX6844UKD_-T

MAX6845UKD_-T

Monitoring Supplies from 0.9V to 1.5V

(MAX6841/MAX6842)

(MAX6843/MAX6844/MAX6845)

Over Temperature

Version), 1.5ms, 30ms, 210ms, and 1.68s

(Active Low)

Push-Pull RESET

Open-Drain RESET

TOP VIEW

RESET

PART

GND

Voltage Detectors

SOT23-5

MAX6841

MAX6842

Ordering Information

5 V

-40°C to +85°C

TEMP RANGE

Transients

Pin Configurations

RESET IN

(RESET)

RESET

GND

= 0.55V

( ) ARE FOR 6844

SOT23-5

MAX6843

MAX6844

MAX6845

PIN-PACKAGE

5 SOT23-5

Features

5 V

Related parts for MAX6841_05

MAX6841_05 Summary of contents

Page 1

Rev 2; 12/05 Ultra-Low-Voltage µP Reset Circuits and General Description The MAX6841–MAX6845 microprocessor (µP) supervi- sory circuits monitor ultra-low-voltage power supplies in µP and digital systems. They provide excellent circuit reliability at low cost by eliminating external compo- nents ...

Page 2

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V .......................................................................-0.3V to +6V CC MR, RESET IN, RESET (open-drain).........................-0.3V to +6V Push-Pull RESET and RESET .....................-0. Input Current (all pins) ........................................................20mA ...

Page 3

Ultra-Low-Voltage µP Reset Circuits and ELECTRICAL CHARACTERISTICS (continued +0.55V to +1.8V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Open-Drain RESET Output Voltage Open-Drain RESET Output Leakage Current Push-Pull ...

Page 4

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors (V = 1.5V +25°C, unless otherwise noted NORMALIZED V RESET THRESHOLD CC vs. TEMPERATURE 1.015 V = 0.833V TH 1.010 1.005 1.000 0.995 0.990 0.985 -40 - ...

Page 5

Ultra-Low-Voltage µP Reset Circuits and PULLUP MANUAL RESET V REF DETECT RESET TIMEOUT PERIOD GND Detailed Description A microprocessor’s (µP’s) reset input starts the µ known state. The MAX6841–MAX6845 assert a reset dur- ing ...

Page 6

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors RESET IN decreases. The MAX6843/MAX6844/ MAX6845 assert a reset when the voltage at RESET IN falls below the RESET IN threshold (V leakage current at RESET IN allows for relatively large- value resistors ...

Page 7

Ultra-Low-Voltage µP Reset Circuits and 0. PULLUP MAX6842 MAX6845 RESET GND Figure 5. Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies Using the MAX6842/MAX6845 Open-Drain RESET Output with Multiple Supplies Generally, the pullup connected to the ...

Page 8

Ultra-Low-Voltage µP Reset Circuits and Voltage Detectors PART MANUAL RESET ✔ MAX6841 ✔ MAX6842 ✔ MAX6843 ✔ MAX6844 ✔ MAX6845 Typical Operating Circuit V IN 3.3V 0.9V DC/DC CONVERTER V CC MAX6842D/E RESET PUSHBUTTON MR RESET SWITCH GND 8 _______________________________________________________________________________________ ...

Page 9

Ultra-Low-Voltage µP Reset Circuits and (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry ...

Related keywords

MAX6841_05 datasheet
MAX6841_05 data sheet
MAX6841_05 pdf datasheet
MAX6841_05 component
MAX6841_05 part
MAX6841_05 distributor
MAX6841_05 RoHS
MAX6841_05 datasheet download