MAX6845 Maxim Integrated Products, MAX6845 Datasheet

MAX6845

Manufacturer Part Number

MAX6845

Description

(MAX6841 - MAX6845) Ultra-Low-Voltage uP Reset Circuits and Voltage Detectors

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX6845.pdf (9 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MAX6845UCQ

Manufacturer:

MAXIM

Quantity:

319

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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 1; 2/03

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.

www.DataSheet4U.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

o Factory-Set Reset Threshold Voltages for

o Adjustable Threshold RESET IN

o Low Power Consumption: 5.7µA (typ)

o ±2.5% Reset Threshold Accuracy

o Five Timeout Periods: 150µs (Voltage Detector

o Available in Three Output Configurations

o Guaranteed Reset Valid to V

o Manual Reset Input

o Immune to Short V

o 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.

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)

TOP VIEW

RESET

Push-Pull RESET

Open-Drain RESET

GND

PART

Voltage Detectors

SOT23-5

MAX6841

MAX6842

5 V

Ordering Information

-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

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