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MAX6721AUTRYD3-T

Description
Supervisory Circuits Dual uPower Supervisor
Categorysemiconductor    Power management   
File Size2MB,18 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX6721AUTRYD3-T Overview

Supervisory Circuits Dual uPower Supervisor

MAX6721AUTRYD3-T Parametric

Parameter NameAttribute value
Product CategorySupervisory Circuits
ManufacturerMaxim
RoHSDetails
TypeVoltage Supervisory
Mounting StyleSMD/SMT
Package / CaseSOT-23-6
Threshold Voltage1.8 V to 5 V, 0.9 V to 3.3 V
Number of Inputs Monitored2 Input
Output TypeActive Low, Open Drain
Manual ResetManual Reset
Battery Backup SwitchingNo Backup
Supply Voltage - Max5.5 V
Maximum Operating Temperature+ 125 C
PackagingReel
Chip Enable SignalsNo Chip Enable
Height1.1 mm
Length2.9 mm
Minimum Operating Temperature- 40 C
Operating Supply Current15 uA
Overvoltage Threshold2.7 V, 2.25 V
Pd - Power Dissipation696 mW
Power Fail DetectionNo
Reset Delay Time280 ms
Factory Pack Quantity2500
Supply Voltage - Min0.8 V
Undervoltage Threshold2.55 V, 2.125 V
Watchdog TimersWatchdog
Width1.63 mm
Unit Weight0.000229 oz
MAX6715A–MAX6729A/
MAX6797A
Dual/Triple, Ultra-Low-Voltage, SOT23 μP
Supervisory Circuits
General Description
The MAX6715A–MAX6729A/MAX6797A are ultra-low-
voltage microprocessor (μP) supervisory circuits designed to
monitor two or three system power-supply voltages. These
devices assert a system reset if any monitored supply falls
below its factory-trimmed or adjustable threshold and main-
tain reset for a minimum timeout period after all supplies rise
above their thresholds. The integrated dual/triple superviso-
ry circuits significantly improve system reliability and reduce
size compared to separate ICs or discrete components.
These devices monitor primary supply voltages (V
CC1
)
from 1.8V to 5.0V and secondary supply voltages (V
CC
2)
from 0.9V to 3.3V with factory-trimmed reset threshold
voltage options (see the
Reset Voltage Threshold Suffix
Guide).
An 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 cor-
rect reset output logic state when either V
CC1
or V
CC2
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/output features are available (see the Selector
Guide). Select reset timeout periods from 1.1ms to
1120ms (min) (see the
Reset Timeout Period Suffix
Guide).
The MAX6715A–MAX6729A/MAX6797A are
available in small 5-, 6-, and 8-pin SOT23 packages and
operate over the -40°C to +125°C temperature range.
● Multivoltage Systems
● Telecom/Networking
Equipment
● Computers/Servers
● Portable/Battery-
Operated Equipment
Features
● V
CC1
(Primary Supply) Reset Threshold Voltages
from 1.58V to 4.63V
● V
CC2
(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
CC1
or
V
CC2
= 0.8V
● Reset Output Logic Options
● Immune to Short V
CC
Transients
● Low Supply Current 14μA (typ) at 3.6V
● Watchdog Disable Feature
● Small 5-, 6-, and 8-Pin SOT23 Packages
Ordering Information
PART
MAX6715AUT_
_D_+T
MAX6716AUT_
_D_+T
MAX6717AUK_
_D_+T
MAX6718AUK_
_D_+T
MAX6719AUT_
_D_+T
MAX6719AUT_ _D_/V+T*
TEMP RANGE
PIN-
PACKAGE
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
-40°C to +125°C 5 SOT23
-40°C to +125°C 5 SOT23
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
Applications
● Industrial Equipment
● Printers/Fax Machines
● Set-Top Boxes
Typical Operating Circuit
UNREGULATED
DC
DC-DC OUT2
CONVERTER
IN
OUT1
V
CC1
R1
V
CC2
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
/V denotes an automotive qualified part.
*Future
product—contact factory for availability.
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 MAX6716AUTLTD3-T is a dual-voltage supervisor V
TH1
=
4.625V, V
TH2
= 3.075V, and 210ms (typ) timeout period.
Ordering Information continued at end of data sheet.
Pin Configurations and Selector Guide appear at end of
data sheet.
1.8V
0.9V
MAX6715A-
MAX6729A/
MAX6797A
RST
RSTIN/PFI
WDI
PFO
MAX67_ _
MR
PUSHBUTTON
SWITCH
I/O
CORE
SUPPLY SUPPLY
RESET
I/O
NMI
µP
R2
19-0536; Rev 4; 3/14
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