DS1834 Maxim Integrated Products, DS1834 Datasheet
DS1834
Specifications of DS1834
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DS1834 Summary of contents
Page 1
... When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces the reset of the affected supply to an active state. Lastly, the DS1834 supports an external reset via an internally debounced pushbutton input. When the pushbutton is pulled low both resets will be asserted for approximately 350 ms after the pushbutton is released ...
Page 2
... This allows the power supply and system power to stabilize before RST is released. All internal operating current for the DS1834 will be drawn from the input with the highest voltage level. The outputs will draw current only from the controlling input ( 3.3V IN). ...
Page 3
... Pushbutton Reset The DS1834 provides a pushbutton switch for manual reset control. When at least one of the DS1834 resets are not in a reset cycle, a pushbutton reset can be generated by pulling the least 2 ms. When the pushbutton is held low, both resets are forced active and will remain active for about 350 ms after the pushbutton is released ...
Page 4
... OUTPUT VALID CONDITIONS All versions of the DS1834 can maintain valid outputs as long as one input remains above 1.2 volts. However, the outputs on the DS1834 use a push-pull output structure which can maintain a valid RST output below 1.2 volts. To sink current below 1.2 volts a resistor can be connected from (see Figure 5) ...
Page 5
... TIMING DIAGRAM: POWER-DOWN Figure 8 TIMING DIAGRAM: POWER-UP Figure DS1834/A/D ...
Page 6
... SYMBOL MIN -1 + 4.50 INTP V 4.25 INTP V 2.80 INTP ) V 2.47 IN INTP C OUT 0.5V (DS1834 & DS1834D 0.5V (DS1834 & DS1834D 0. (- +85 C) TYP MAX UNITS 5 IN(MAX) +0.3 V 0.5 V =1.2V to 5.5V) CC TYP MAX UNITS -0.1V µA +1.0 µA 350 mA µA 50 µ ...
Page 7
... RST t RPD t 300 200 RPU =2.7V. and 5V IN [=2.7V. and 5V IN input with an internal impedance of approximately IN(MAX) =2.7V (valid for DS1834 and DS1834D only [=5.5V. and [=3.6V. and minimum will not generate a reset. CCTP DS1834 DS1834A DS1834 DS1834A DS1834 DS1834A 834 ...