BU8307CS データシートの表示（PDF） - ROHM Semiconductor

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コンポーネント説明

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BU8307CS

Pulse / tone dialer for telephone set

ROHM Semiconductor 

Communication ICs

BU8307CS / BU8307CF

FCircuit operation

Keypad functions

0 to 9 These are numeric keys, and dial signals are

sent when one of these keys is pressed.

, # In tone mode, when these keys are pressed,

the corresponding DTMF signals are sent. In

pulse mode, if the # is the first key to be

pressed after going off-hook, the redial opera-

tion is executed. The key switches the unit

from pulse mode to tone mode.

PA

When this key is pressed, a 3.6-second pause

is generated. It also serves as a “break pause”

key when redialing.

T

This is used to switch from pulse mode to tone

mode. It also serves as a “break pause” key

when redialing.

R

This is used in both redial and inhibit redial op-

erations. When redialing, it also serves as a

“break pause” key.

H

Pressing this key initiates on-hook operation.

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