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Part Number: MAX6746
Description: The MAX6746MAX6753 low-power microprocessor (P) supervisory circuits monitor single/dual system supply...
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MAX6746
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DataSheet
General Description
MAX6746 General Description
The MAX6746MAX6753 low-power microprocessor (P) supervisory circuits monitor single/dual system supply voltages from 1.575V to 5V and provide maximum adjustability for reset and watchdog functions. These devices assert a reset signal whenever the VCC supply voltage or RESET IN falls below its reset threshold or when manual reset is pulled low. The reset output remains asserted for the reset timeout period after VCC and RESET IN rise above the reset threshold. The reset function features immunity to power-supply transients.
The MAX6746MAX6753 have ±2% factory-trimmed reset threshold voltages in approximately 100mV increments from 1.575V to 5.0V and/or adjustable reset threshold voltages using external resistors.
The reset and watchdog delays are adjustable with external capacitors. The MAX6746MAX6751 contain a watchdog select input that extends the watchdog timeout period by 128x. The MAX6752/MAX6753 contain a window watchdog timer that looks for activity outside an expected window of operation.
The MAX6746MAX6753 are available with a push-pull or open-drain active-low RESET output. The MAX6746 MAX6753 are available in an 8-pin SOT23 package and are fully specified over the automotive temperature range (-40°C to +125°C).
MAX6746 Maximum Ratings
VCC to GND...........................................................-0.3V to +6.0V
SRT, SWT, SET0, SET1, RESET IN, WDS, MR,
WDI, to GND ...........................................-0.3V to (VCC + 0.3V)
RESET (Push-Pull) to GND........................-0.3V to (VCC + 0.3V)
RESET (Open Drain) to GND ..............................-0.3V to +6.0V
Input Current (All Pins) ................................................±20mA
Output Current (RESET) ...............................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range ....................-40°C to +125°C
Storage Temperature Range .......................-65°C to +150°C
Junction Temperature..................................................+150°C
Lead Temperature (soldering, 10s) .............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
MAX6746 Features
Factory-Set Reset Threshold Options from 1.575V to 5V in ~100mV Increments
Adjustable Reset Threshold Options
Single/Dual Voltage Monitoring
Capacitor-Adjustable Reset Timeout
Capacitor-Adjustable Watchdog Timeout
Min/Max (Windowed) Watchdog Option
Manual Reset Input Option
Guaranteed RESET Valid for VCC 1V
3.7A Supply Current
Push-Pull or Open-Drain RESET Output Options
Power-Supply Transient Immunity
Small 8-Pin SOT23 Packages
Adjustable Reset Threshold Options
Single/Dual Voltage Monitoring
Capacitor-Adjustable Reset Timeout
Capacitor-Adjustable Watchdog Timeout
Min/Max (Windowed) Watchdog Option
Manual Reset Input Option
Guaranteed RESET Valid for VCC 1V
3.7A Supply Current
Push-Pull or Open-Drain RESET Output Options
Power-Supply Transient Immunity
Small 8-Pin SOT23 Packages
MAX6746 Typical Application
Medical Equipment
Automotive
Intelligent Instruments
Portable Equipment
Battery-Powered
Computers/Controllers
Embedded Controllers
Critical P Monitoring
Set-Top Boxes
Computers
Automotive
Intelligent Instruments
Portable Equipment
Battery-Powered
Computers/Controllers
Embedded Controllers
Critical P Monitoring
Set-Top Boxes
Computers
MAX6746 Connection Diagram
MAX6746
PDF/DataSheet Download
- Datasheet: MAX6746
- File Size: 219389 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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