MAX6725KAWGD1-T datasheet, PDF

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MAX6725KAWGD1-T: DescriptionSupervisory Circuits; Categorysemiconductor Power management; File Size715KB，19 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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Supervisory Circuits

MAX6725KAWGD1-T Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Maxim
Product Category	Supervisory Circuits
Type	Voltage Supervisory
Mounting Style	SMD/SMT
Package / Case	SOT-23-8
Threshold Voltage	1.8 V to 5 V, 0.9 V to 3.3 V
Number of Inputs Monitored	3 Input
Output Type	Active High, Active Low, Open Drain
Manual Reset	Manual Reset
Watchdog Timers	Watchdog
Battery Backup Switching	No Backup
Reset Delay Time	1.65 ms
Supply Voltage - Max	5.5 V
Maximum Operating Temperature	+ 85 C
Minimum Operating Temperature	- 40 C
Packaging	Reel
Height	1.1 mm
Length	2.9 mm
Width	1.63 mm
Overvoltage Threshold	1.71 V, 1.14 V, Adjustable
Undervoltage Threshold	1.62 V, 1.08 V, Adjustable
Chip Enable Signals	No Chip Enable
Operating Supply Current	15 uA
Pd - Power Dissipation	714 mW
Power Fail Detection	No
Supply Voltage - Min	0.8 V
Unit Weight	0.001411 oz

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19-2325; Rev 5; 12/05

Dual/Triple Ultra-Low-Voltage SOT23 µP

Supervisory Circuits

General Description

The MAX6715–MAX6729 are ultra-low-voltage microproces-

sor (µP) supervisory circuits designed to monitor two or three

system power-supply voltages. These devices assert a sys-

tem reset if any monitored supply falls below its factory-

trimmed or adjustable threshold and maintain reset for a

minimum timeout period after all supplies rise above their

thresholds. The integrated dual/triple supervisory circuits sig-

nificantly improve system reliability and reduce size com-

pared to separate ICs or discrete components.

These devices monitor primary supply voltages (V

1) from

1.8V to 5.0V and secondary supply voltages (V

2) from

0.9V to 3.3V with factory-trimmed reset threshold voltage

options (see

Reset Voltage Threshold Suffix Guide).

externally adjustable RSTIN input option allows customers to

monitor a third supply voltage down to 0.62V. These devices

are guaranteed to be in the correct reset output logic state

when either V

1 or V

2 remains greater than 0.8V.

A variety of push-pull or open-drain reset outputs along with

watchdog input, manual reset input, and power-fail input/out-

put features are available (see

Selector Guide).

Select reset

timeout periods from 1.1ms to 1120ms (min) (see

Reset

Timeout Period Suffix Guide).

The MAX6715–MAX6729 are

available in small 5, 6, and 8-pin SOT23 packages and oper-

ate over the -40°C to +85°C temperature range.

Features

♦

1 (primary supply) Reset Threshold Voltages

from 1.58V to 4.63V

♦

2 (secondary supply) Reset Threshold

Voltages from 0.79V to 3.08V

♦

Externally Adjustable RSTIN Threshold for

Auxiliary/Triple-Voltage Monitoring

(0.62V internal reference)

♦

Watchdog Timer Option

35s (min) Long Startup Period

1.12s (min) Normal Timeout Period

♦

Manual Reset Input Option

♦

Power-Fail Input/Power-Fail Output Option

(Push-Pull and Open-Drain Active-Low)

♦

Guaranteed Reset Valid Down to V

1 or

2 = 0.8V

♦

Reset Output Logic Options

♦

Immune to Short V

Transients

♦

Low Supply Current 14µA (typ) at 3.6V

♦

Small 5, 6, and 8-Pin SOT23 Packages

MAX6715–MAX6729

Applications

Multivoltage Systems

Telecom/Networking Equipment

Computers/Servers

Portable/Battery-Operated Equipment

Industrial Equipment

Printer/Fax

Set-Top Boxes

PART

MAX6715UT_

_D_ -T

MAX6716UT_

_D_ -T

MAX6717UK_

_D_ -T

MAX6718UK_

_D_ -T

MAX6719UT_

_D_ -T

MAX6720UT_

_D_ -T

Ordering Information

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

6 SOT23-6

5 SOT23-5

6 SOT23-6

Typical Operating Circuit

OUT2

DC/DC

CONVERTER

OUT1

RST

RSTIN/PFI

PUSHBUTTON

SWITCH

MAX67_ _

WDI

PFO

RESET

I/O

NMI

µP

UNREGULATED

1.8V

0.9V

I/O

CORE

SUPPLY SUPPLY

Note:

The first “_ _” are placeholders for the threshold voltage

levels of the devices. Desired threshold levels are set by the part

number suffix found in the Reset Voltage Threshold Suffix Guide.

The “_” after the D is a placeholder for the reset timeout delay

time. Desired delay time is set using the timeout period suffix

found in the Reset Timeout Period Suffix Guide. For example the

MAX6716UTLTD3-T is a dual-voltage supervisor V

1 = 4.625V,

2 = 3.075V, and 210ms (typ) timeout period.

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

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

Ordering Information continued at end of data sheet.

Pin Configurations and Selector Guide appear at end of

data sheet.

________________________________________________________________

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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