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MAX6373 Dataheets PDF



Part Number MAX6373
Manufacturers Maxim
Logo Maxim
Description Pin-Selectable Watchdog Timers
Datasheet MAX6373 DatasheetMAX6373 Datasheet (PDF)

Click here for production status of specific part numbers. MAX6369–MAX6374 Pin-Selectable Watchdog Timers General Description The MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (μP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the μP does no.

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Click here for production status of specific part numbers. MAX6369–MAX6374 Pin-Selectable Watchdog Timers General Description The MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (μP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the μP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (WDO) output to signal that the system is not executing the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the μP or interrupt the system to warn of processing errors. The MAX6369–MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications: ●● Watchdog startup delay: provides an initial delay before the watchdog timer is started. ●● Watchdog timeout period: normal operating watchdog timeout period after the initial startup delay. ●● Watchdog output/timing options: open drain (100ms) or push-pull (1ms). The MAX6369–MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages. Benefits and Features ●● Precision Watchdog Timer for Critical μP Applications ●● Pin-Selectable Watchdog Timeout Periods ●● Pin-Selectable Watchdog Startup Delay Periods ●● Ability to Change Watchdog Timing Characteristics Without Power Cycling ●● Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output ●● Watchdog Timer Disable Feature ●● +2.5V to +5.5V Operating Voltage ●● 8μA Low Supply Current ●● No External Components Required ●● Miniature 8-Pin SOT23 Package ●● AEC-Q100 Qualified (MAX6369KA/V+ and MAX6374KA/V+ Only) Applications ●● Embedded Control Systems ●● Industrial Controllers ●● Critical μP and Microcontroller (μC) Monitoring ●● Automotive ●● Telecommunications ●● Networking Functional Diagram VCC WDI MAX6369–MAX6374 TRANSITION DETECTOR EN SET 2 SET 1 SET 0 CONTROL LOGIC ENABLE CLEAR SET WATCHDOG TIMEOUT SET STARTUP DELAY WATCHDOG TIMER CIRCUITRY GND OUT OUTPUT WDO 19-1676; Rev 9; 3/19 MAX6369–MAX6374 Pin-Selectable Watchdog Timers Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC......................................................................-0.3V to +6V WDI......................................................................-0.3V to +6V WDO (Open Drain: MAX6369/71/73)...................-0.3V to +6V WDO (Push-Pull: MAX6370/72/74........ -0.3V to (VCC + 0.3V) SET0, SET1, SET2............................... -0.3V to (VCC + 0.3V) Maximum Current, Any Pin (input/output)...........................20mA Continuous Power Dissipation (TA = +70°C) 8-Pin SOT23 (derate 5.6mW/°C above +70°C)........444.4mW Operating Temperature Range......................... -40°C to +125°C Storage Temperature Range............................. -65°C to +150°C Junction Temperature......................................................+150°C VCC Rise or Fall Rate....................................................0.05V/μs Lead Temperature (soldering, 10s)..................................+300°C Soldering Temperature (reflow) Lead(Pb)-free................................................................... +260°C Containing Lead (Pb).......................................................+240°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. Package Information 8 SOT23 PACKAGE CODE K8SN-1/K8SN+1 Outline Number 21-0078 Land Pattern Number 90-0176 Thermal Resistance, Single-Layer Board: Junction to Ambient (θJA) Junction to Case (θJC) Thermal Resistance, Multi-Layer Board: N/A 80°C/W Junction to Ambient (θJA) Junction to Case (θJC) 180°C/W 60°C/W For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerat.


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