DS1233Z-10 参数 Datasheet PDF下载

DS1233

OPERATION - PUSHBUTTON RESET

The DS1233 provides for a pushbutton switch to be connected to the

RST

output pin. When the DS1233

is not in a reset cycle, it continuously monitors the

RST

signal for a low going edge. If an edge is

detected, the DS1233 will debounce the switch by pulling the

RST

line low. After the internal timer has

expired, the DS1233 will continue to monitor the

RST

line. If the line is still low, the DS1233 will

continue to monitor the line looking for a rising edge. Upon detecting a release, the DS1233 will force the

RST

line low and hold it low for 350 ms.

For proper operation with an external pushbutton, a capacitor between 100 pF and 0.01

µF

must be

connected between

RST

and ground. In applications where additional reset current is required, a

minimum capacitance of 500 pF should be used, along with a parallel external pull-up resistor of 1

kΩ=minimum.

NOTE:

BLOCK DIAGRAM

Figure 1

APPLICATION EXAMPLE

Figure 2

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