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Max Transient Duration (Ps)

LM3722, LM3723, LM3724

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SNVS154E – MAY 2001 – REVISED MARCH 2013

pulse. In general, as the magnitude of the transient increases, going further below the threshold, the maximum

will provide additional transient rejection.

Figure 14. Maximum Transient Duration without Causing a Reset Pulse vs. Reset Comparator Overdrive

INTERFACING TO µPS WITH BIDIRECTIONAL RESET PINS

Microprocessors with bidirectional reset pins, such as the Motorola 68HC11 series, can be connected to the

LM3722 RESET output. To ensure a correct output on the LM3722 even when the microprocessor reset pin is in

the opposite state, connect a 4.7k

Ω resistor between the LM3722 RESET output and the µP reset pin, as shown

in Figure 15. Buffer the LM3722 RESET output to other system components.

Typical Application Circuits

Figure 15. Interfacing to Microprocessors with Bidirectional Reset I/O

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Product Folder Links: LM3722 LM3723 LM3724