BU8307CS Datasheet, PDF (15/17 Pages) Rohm – Pulse / tone dialer for telephone set

Communication ICs
FOperation notes
The reset circuits in the IC could fail to operate properly,
depending on the way the supply voltage rises when
power is applied. To avoid problems, we recommend ad-
ding a circuit to the HS pin, as shown in the diagram be-
low. (There is no need for this circuit, however, if the HS
pin momentarily goes HIGH by some other means, for
example, by CPU control.)
FApplication example
BU8307CS / BU8307CF
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