DS1232 Maxim Integrated Products, DS1232 Datasheet
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DS1232
Specifications of DS1232
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DS1232 Summary of contents
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... Industrial temperature -40°C to +85°C available, designated N DESCRIPTION The DS1232 MicroMonitor™ Chip monitors three vital conditions for a microprocessor: power supply, software execution, and external override. First, a precision temperature-compensated reference and comparator circuit monitors the status of V power fail signal is generated which forces reset to the active state. When V condition, the reset signals are kept in the active state for a minimum of 250 ms to allow the power supply and processor to stabilize ...
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... The third function is a watchdog timer. The DS1232 has an internal timer that forces the reset signals to the active state if the strobe input is not driven low prior to timeout. The watchdog timer function can be set to operate on timeout settings of approximately 150 ms, 600 ms, and 1 ...
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... MICROMONITOR BLOCK DIAGRAM Figure 1 PUSHBUTTON RESET Figure 2 WATCHDOG TIMER Figure DS1232/DS1232S ...
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... TIMING DIAGRAM: PUSHBUTTON RESET Figure 4 TIMING DIAGRAM: STROBE INPUT Figure 5 WATCHDOG TIMEOUTS Table 1 TD PIN GND Float V CC TIME-OUT MIN TYP 62.5 ms 150 ms 250 ms 600 ms 500 ms 1200 DS1232/DS1232S MAX 250 ms 1000 ms 2000 ms ...
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... TIMING DIAGRAM: POWER-DOWN Figure 6 TIMING DIAGRAM: POWER-UP Figure DS1232/DS1232S ...
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... IL (0°C to 70°C; V SYMBOL MIN TYP -0.5V -0. 4.50 4.62 CCTP V 4.25 4.37 CCTP SYMBOL MIN TYP OUT DS1232/DS1232S (0°C to 70°C) MAX UNITS NOTES =4.5 to 5.5V) CC MAX UNITS NOTES μ =25°C) A MAX UNITS ...
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... ST t RPD t 300 F t 250 Transition RPU RST PDLY with an internal impedance of 10k typical power-down until V CC drops below 2.0V DS1232/DS1232S =5V ± 10%) (0°C to 70° TYP MAX UNITS ms 610 1000 ms ns μs 100 175 μs 610 1000 ms μ drops below 2.0V. ...