MAX6361_11 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – SOT23, Low-Power μP Supervisory Circuits with Battery Backup

19-1615; Rev 4; 10/11
SOT23, Low-Power µP Supervisory Circuits
with Battery Backup
General Description
The MAX6361–MAX6364 supervisory circuits reduce the
complexity and number of components required for
power-supply monitoring and battery control functions in
microprocessor (µP) systems. The circuits significantly
improve system reliability and accuracy compared to that
obtainable with separate ICs or discrete components.
Their functions include µP reset, backup battery
switchover, and power failure warning.
The MAX6361–MAX6364 operate from supply voltages as
low as +1.2V. The factory-preset reset threshold voltage
ranges from 2.32V to 4.63V (see Ordering Information).
These devices provide a manual reset input (MAX6361),
watchdog timer input (MAX6362), battery-on output
(MAX6363), and an auxiliary adjustable reset input
(MAX6364). In addition, each part type is offered in three
reset output versions: an active-low open-drain reset, an
active-low open-drain reset, and an active-high open-
drain reset (see Selector Guide at end of data sheet).
Computers
Controllers
Intelligent Instruments
Critical µP/µC
Power Monitoring
Applications
Fax Machines
Industrial Control
POS Equipment
Portable/Battery-Powered
Equipment
TOP VIEW
Pin Configurations
RESET, RESET 1
6 BATT
MAX6361
GND 2
5 OUT
MR 3
4 V_CC
SOT23-6
Pin Configurations continued at end of data sheet.
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Features
o Low +1.2V Operating Supply Voltage
(V_CC or V_BATT)
o Precision Monitoring of +5.0V, +3.3V, +3.0V, and
+2.5V Power-Supply Voltages
o Debounced Manual Reset Input (MAX6361)
o Watchdog Timer with 1.6s Timeout Period
(MAX6362)
o Battery-On Output Indicator (MAX6363)
o Auxiliary User-Adjustable RESET IN (MAX6364)
o Three Available Output Structures
Push-Pull RESET, Open-Drain RESET,
Open-Drain RESET
o RESET/RESET Valid Down to 1.2V Guaranteed
(V_CC or V_BATT)
o Power-Supply Transient Immunity
o 150ms (min) Reset Timeout Period
o Small 6-Pin SOT23 Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX6361LUT_ _-T -40°C to +85°C 6 SOT23
MAX6361PUT_ _-T -40°C to +85°C 6 SOT23
MAX6361HUT_ _-T -40°C to +85°C 6 SOT23
MAX6362LUT_ _-T -40°C to +85°C 6 SOT23
MAX6362PUT_ _-T -40°C to +85°C 6 SOT23
MAX6362HUT_ _-T -40°C to +85°C 6 SOT23
MAX6363LUT_ _-T -40°C to +85°C 6 SOT23
MAX6363PUT_ _-T -40°C to +85°C 6 SOT23
MAX6363HUT_ _-T -40°C to +85°C 6 SOT23
MAX6364LUT_ _-T -40°C to +85°C 6 SOT23
MAX6364PUT_ _-T -40°C to +85°C 6 SOT23
MAX6364HUT_ _-T -40°C to +85°C 6 SOT23
Note: These parts offer a choice of reset threshold voltages.
From the table below, select the suffix corresponding to the
desired threshold voltage and insert it into the part number to
complete it. When ordering from the factory, there is a 2500-
piece minimum on the SOT package (tape-and-reel only).
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing "-T" with "+T" when ordering.
SUFFIX
RESET THRESHOLD RANGES (V)
MIN
TYP
MAX
46
4.50
4.63
4.75
44
4.25
4.38
4.50
31
3.00
3.08
3.15
29
2.85
2.93
3.00
26
2.55
2.63
2.70
23
2.25
2.32
2.38
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.