MAX6843UKD3-T datasheet, PDF - EEWORLD Datasheet

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MAX6843UKD3-T: DescriptionSupervisory Circuits; CategoryPower/power management The power supply circuit; File Size576KB，9 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX6843UKD3-T Overview

Supervisory Circuits

MAX6843UKD3-T Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	SOIC
package instruction	MO-178AA, SOT-23, 5 PIN
Contacts	5
Reach Compliance Code	not_compliant
ECCN code	EAR99
Other features	RESET THRESHOLD VOLTAGE IS 1.313V
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 code	R-PDSO-G5
JESD-609 code	e0
length	2.9 mm
Humidity sensitivity level	1
Number of channels	1
Number of functions	1
Number of terminals	5
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	LSSOP
Encapsulate equivalent code	TSOP5/6,.11,37
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	245
power supply	.55/1.8 V
Certification status	Not Qualified
Maximum seat height	1.45 mm
Maximum supply current (Isup)	0.02 mA
Maximum supply voltage (Vsup)	1.8 V
Minimum supply voltage (Vsup)	0.75 V
Nominal supply voltage (Vsup)	0.9 V
surface mount	YES
technology	BICMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	1.625 mm

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19-2625; Rev 2; 12/05

Ultra-Low-Voltage µP Reset Circuits and

Voltage Detectors

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 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

supply voltage declines below a preset or

adjustable threshold or whenever manual reset (MR) is

asserted. Reset remains asserted for a fixed timeout

delay after V

has risen above the reset threshold and

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.

Features

♦

Factory-Set Reset Threshold Voltages for

Monitoring Supplies from 0.9V to 1.5V

(MAX6841/MAX6842)

♦

Adjustable Threshold RESET IN

(MAX6843/MAX6844/MAX6845)

♦

Low Power Consumption: 5.7µA (typ)

♦

±2.5% Reset Threshold Accuracy

Over Temperature

♦

Five Timeout Periods: 150µs (Voltage Detector

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

♦

Available in Three Output Configurations

Push-Pull

RESET

Push-Pull RESET

Open-Drain

RESET

♦

Guaranteed Reset Valid to V

= 0.55V

(Active Low)

♦

Manual Reset Input

♦

Immune to Short V

Transients

♦

Space-Saving 5-Pin SOT23 Package

MAX6841–MAX6845

Ordering Information

PART

MAX6841_UKD_-T

MAX6842_UKD_-T

MAX6843UKD_-T

MAX6844UKD_-T

MAX6845UKD_-T

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

5 SOT23-5

Applications

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

Telecom/Networking Equipment

Basestations

Servers/Workstations

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.

Pin Configurations

TOP VIEW

RESET 1

GND 2

5 V

RESET

(RESET)

GND 2

4 MR

RESET IN 3

5 V

MAX6841

MAX6842

MAX6843

MAX6844

MAX6845

4 MR

Selector Guide and Typical Operating Circuit appear at end

of data sheet.

RESET 3

SOT23-5

( ) ARE FOR 6844

________________________________________________________________

Maxim Integrated Products

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.

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