DS1834 查看數據表（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS1834

Dual EconoReset with Pushbutton

Dallas Semiconductor -> Maxim Integrated 

DS1834/A/D

Tolerance Select

The DS1834 provides two TOL inputs for individual customization of the DS1834 to specific application

requirements. If the TOL for the 5-volt supply is tied to the 5-volt input a 10% tolerance is selected for

the 5 volt supply. If the TOL for the 3.3-volt supply is tied to the 3.3-volt input, a 20% tolerance is

selected for the 3.3-volt supply. If TOL inputs are tied to ground, the 5-volt input will be set at a 5%

tolerance and the 3.3-volt input would be set to a 10% tolerance.

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 PBRST pin low for at

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. The pushbutton input is pulled high through an internal

40 kΩ=pull-up resistor and debounced via internal circuitry. See Figure 3 for an application example and

Figure 4 for the timing diagram.

PUSHBUTTON RESET Figure 3

TIMING DIAGRAM: PUSHBUTTON RESET Figure 4

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