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MAX6373KA-T Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX6373KA-T Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 10 page 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 repeated- ly 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 watch- dog (WDO) output to signal that the system is not exe- cuting 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 watch- dog 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. ________________________Applications Embedded Control Systems Industrial Controllers Critical µP and Microcontroller (µC) Monitoring Automotive Telecommunications Networking Features o Precision Watchdog Timer for Critical µP Applications o Pin-Selectable Watchdog Timeout Periods o Pin-Selectable Watchdog Startup Delay Periods o Ability to Change Watchdog Timing Characteristics Without Power Cycling o Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output o Watchdog Timer Disable Feature o +2.5V to +5.5V Operating Voltage o 8µA Low Supply Current o No External Components Required o Miniature 8-Pin SOT23 Package Pin-Selectable Watchdog Timers ________________________________________________________________ Maxim Integrated Products 1 19-1676; Rev 5; 1/11 PART OUTPUT WDO PULSE WIDTH (ms) MINIMUM STARTUP DELAY MINIMUM WATCHDOG TIMEOUT MAX6369 Open Drain 100 Selectable: 1ms to 60s Selectable: 1ms to 60s MAX6370 Push-Pull 1 Selectable: 1ms to 60s Selectable: 1ms to 60s MAX6371 Open Drain 100 60s Selectable: 1ms to 60s MAX6372 Push-Pull 1 60s Selectable: 1ms to 60s MAX6373 Open Drain 100 Selectable: 200µs to 60s or first edgeSelectable: 30µs to 10s MAX6374 Push-Pull 1 Selectable: 200µs to 60s or first edgeSelectable: 30µs to 10s Selector Guide 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. PART TEMP RANGE PIN- PACKAGE TOP MARK MAX6369KA-T -40 °C to +125°C 8 SOT23 AADC MAX6369KA/V-T -40 °C to +125°C 8 SOT23 AEQV MAX6369KA/V+T -40 °C to +125°C 8 SOT23 AEQV MAX6370KA-T -40 °C to +125°C 8 SOT23 AADD MAX6371KA-T -40 °C to +125°C 8 SOT23 AADE MAX6372KA-T -40 °C to +125°C 8 SOT23 AADF MAX6373KA-T -40 °C to +125°C 8 SOT23 AADG MAX6374KA-T -40 °C to +125°C 8 SOT23 AADH Ordering Information Pin Configuration appears at end of data sheet. Note: All devices are available in tape-and-reel only. Required order increment is 2,500 pieces. /V denotes an automotive qualified part. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. |
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