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MAX6723AUTTFD3 View Datasheet(PDF) - Maxim Integrated

Part NameMAX6723AUTTFD3 MaximIC
Maxim Integrated MaximIC
DescriptionDual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits


MAX6723AUTTFD3 Datasheet PDF : 18 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Dual/Triple, Ultra-Low-Voltage, SOT23 µP
Supervisory Circuits
Pin Description (continued)
PIN
MAX6728A/
MAX6715A/ MAX6717A/ MAX6719A/ MAX6721A/ MAX6723A/ MAX6725A/
MAX6727A MAX6729A/
MAX6716A MAX6718A MAX6720A MAX6722A MAX6724A MAX6726A
MAX6797A
NAME
FUNCTION
Active-Low Reset Output,
Open-Drain or Push-Pull.
RST2 changes from high
to low when VCC1 or VCC2
drops below the selected
reset thresholds or MR is
pulled low. RST2 remains
5
RST2 low for the reset timeout
period after VCC1/VCC2
exceed the device reset
thresholds or MR goes low
to high. Open-drain
outputs require an external
pullup resistor. Push-pull
outputs are referenced to
VCC2.
2
2
2
2
2
2
2
2
GND Ground
Active-Low Manual-Reset
Input. Internal 50kpullup
to VCC1. Pull low
to force a reset. Reset
3
3
3
3
5
5
5
MR
remains active as long as
MR is low and for the reset
timeout period after MR
goes high. Leave
unconnected or connect
to VCC1 if unused.
Secondary Supply Voltage
Input. Powers
4
4
4
4
4
6
6
6
VCC2
the device when it is
above VCC1 and input
for secondary reset
threshold monitor.
Primary Supply Voltage
Input. Powers the device
6
5
6
6
6
8
8
8
VCC1 when it is above VCC2
and input for primary reset
threshold monitor.
_______________________________________________________________________________________ 7
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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 maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components.

Features
♦ VCC1 (Primary Supply) Reset Threshold Voltages from 1.58V to 4.63V
♦ VCC2 (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 VCC1 or VCC2 = 0.8V
♦ Reset Output Logic Options
♦ Immune to Short VCC Transients
♦ Low Supply Current 14µA (typ) at 3.6V
♦ Watchdog Disable Feature
♦ Small 5-, 6-, and 8-Pin SOT23 Packages

Applications
Multivoltage Systems
Telecom/Networking Equipment
Computers/Servers
Portable/Battery Operated Equipment
Industrial Equipment
Printers/Fax Machines
Set-Top Boxes

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