MAX6467XS21D7-T Maxim Integrated, MAX6467XS21D7-T Datasheet

MAX6467XS21D7-T

Manufacturer Part Number

MAX6467XS21D7-T

Description

Supervisory Circuits

Manufacturer

Maxim Integrated

Series

MAX6467, MAX6468r

Datasheet

1.MX7820LN.pdf (9 pages)

Specifications of MAX6467XS21D7-T

Number Of Voltages Monitored

Monitored Voltage

1.8 V to 5 V

Undervoltage Threshold

2.048 V

Overvoltage Threshold

2.153 V

Output Type

Active Low, Open Drain

Manual Reset

Resettable

Watchdog

No Watchdog

Battery Backup Switching

No Backup

Power-up Reset Delay (typ)

1800 ms

Supply Voltage - Max

5.5 V

Maximum Operating Temperature

+ 125 C

Mounting Style

SMD/SMT

Package / Case

SC-70

Chip Enable Signals

Maximum Power Dissipation

245 mW

Minimum Operating Temperature

- 40 C

Power Fail Detection

Supply Current (typ)

7 uA

Supply Voltage - Min

1 V

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The MAX6467/MAX6468 microprocessor (µP) supervi-

sory circuits monitor single power-supply voltages from

+1.8V to +5.0V and assert a reset if the supply voltage

drops below its preset threshold. An edge-triggered,

one-shot manual reset function ensures that the µP

enters the reset mode for a fixed timeout period only,

even in the event of a continuously asserted manual

reset. The MAX6467/MAX6468 significantly improve

system reliability compared to traditional manual reset

supervisory circuits.

A variety of factory-trimmed threshold options accommo-

date different supply voltages and tolerances, eliminating

external components. The factory-set thresholds range

from +1.575V to +4.625V to monitor +5.0V, +3.3V, +3.0V,

+2.5V, and +1.8V supplies with various tolerances. Reset

timeout periods of 150ms (min) and 1200ms (min) are

available to accommodate different µP platforms.

A single, active-low RESET output asserts when V

drops below its threshold or if the edge-triggered MR

asserts low. RESET remains low for the reset timeout

period after V

one-shot timeout period after a manual reset input falling

edge. RESET remains valid as long as V

above +1V. Open-drain (MAX6467) and push-pull

(MAX6468) output options provide additional flexibility in

the system design.

The MAX6467/MAX6468 are offered in the space-saving

4-pin SOT143 package and the ultra-small 4-pin SC70

package and are specified over the automotive (-40°C to

+125°C) temperature range.

19-2523; Rev 1; 11/05

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.

Typical Operating Circuit appears at end of data sheet.

Cell Phones/PDAs

Embedded Control Systems

Industrial Equipment

Automotive Products

Portable/Battery-Powered Equipment

Medical Devices

DSL Modems

MP3 Players

GPS Systems

Digital Cameras

with Edge-Triggered, One-Shot Manual Reset

Microprocessor Supervisory Reset Circuits

rises above its threshold and for a fixed,

________________________________________________________________ Maxim Integrated Products

General Description

Applications

remains

♦ Precision Factory-Set Reset Threshold Voltages

♦ Edge-Triggered Manual Reset Input with One-

♦ Two Reset Timeout Period Options (150ms or

♦ Immune to Short Voltage Transients

♦ Low Supply Current (3µA at V

♦ RESET Valid to V

♦ Active-Low Open-Drain and Push-Pull RESET

♦ -40°C to +125°C Operating Temperature Range

♦ Small 4-Pin SC70 and SOT143 Packages

♦ No External Components Required

♦ Pin Compatible with MAX811, MAX6315,

Note: Insert reset threshold suffix (see Reset Threshold table)

after XS or US. Insert reset timeout delay (see Reset Timeout

Delay table) after D to complete the part number. Sample stock

is generally held on standard versions only (see Standard

Versions table). Standard versions have an order increment

requirement of 2500 pieces. Nonstandard versions have an

order increment requirement of 10,000 pieces. Contact factory

for availability.

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

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

Pin Configurations continued at end of data sheet.

MAX6467XS_ _D_-T

MAX6467US_ _D_-T

MAX6468XS_ _D_-T

MAX6468US_ _D_-T

for +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies

Shot Pulsed Reset Output

1200ms min)

Output Options

MAX6384, and MAX6386

PART

RESET

TOP VIEW

GND

-40°C to +125°C

Ordering Information

TEMP RANGE

MAX6467XS

MAX6468XS

= +1V

Pin Configurations

SC70

= +1.8V)

PIN-PACKAGE

4 SC70-4

4 SOT143-4

4 SC70-4

4 SOT143-4

Features

Related parts for MAX6467XS21D7-T

MAX6467XS21D7-T Summary of contents

Page 1

... MP3 Players GPS Systems Digital Cameras Typical Operating Circuit appears 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. ♦ Precision Factory-Set Reset Threshold Voltages for +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies ♦ ...

Page 2

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +6.0V CC RESET to GND Open-Drain........................................................-0.3V to +6.0V Push-Pull.................................................-0. GND .................................................-0. Input/Output Current (all pins) ............................................20mA Stresses ...

Page 3

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset ELECTRICAL CHARACTERISTICS (continued +1.2V to +5.5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYM RESET Output Low ...

Page 4

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset (V = +5V, MAX6468US29D3 device OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 ...

Page 5

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset PIN NAME 1 GND Ground Reset Output. RESET is an active-low open-drain (MAX6467) or push-pull (MAX6468) output. RESET asserts low when V drops below the selected threshold and remains low for ...

Page 6

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset V RESET TIMEOUT PERIOD CC RESET TIMEOUT SUFFIX D3 D7 *Additional reset timeout options may be available. Contact factory for availability. Applications Information Falling V In addition to issuing a reset ...

Page 7

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset Standard Versions PART MAX6467XS16D3 MAX6467XS22D3 MAX6467XS26D3 MAX6467XS29D3 MAX6467XS46D3 MAX6467US16D3 MAX6467US22D3 MAX6467US26D3 MAX6467US29D3 MAX6467US46D3 MAX6468XS16D3 MAX6468XS22D3 MAX6468XS26D3 MAX6468XS29D3 MAX6468XS46D3 MAX6468US16D3 MAX6468US22D3 MAX6468US26D3 MAX6468US29D3 MAX6468US46D3 Typical Operating Circuit +1.0V TO +5. ...

Page 8

Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset (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.) 8 _______________________________________________________________________________________ Package Information PACKAGE OUTLINE, SOT-143, 4L ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2005 Maxim Integrated Products ...

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