MSM6234 查看數據表（PDF） - Oki Electric Industry

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产品描述 (功能)

生产厂家

MSM6234

DTMF Tone Dialer LSI

Oki Electric Industry 

¡ Semiconductor

MSM6234

AKD

The AKD pin drives the external bipolar transistor by its N-channel open drain output.

This pin is open when the key input is off, while it becomes low when the key input is on. AKD is

used for the mute of the transmitter/receiver.

MSM6234RS

Key input OFF

ON

AKD

AKD

Open "L"

OFF

Open

TONE DISABLE

This is an input pin to control the output of the TONE OUT pin.

When the input to this pin is high level, the TONE OUT pin normally operates. When the input to

this pin is low level, however, the output from the TONE OUT pin is prohibited even if the key input

is on.

AKD is effective at that time. This pin is provided with the pull-up resistance of 50 kW to 200 kW

internally.

key input OFF

ON

TONE DISABLE

AKD

"H"

Open

"L"

TONE OUT "L"

OFF

"L"

Open

"L"

TONE DISABLE

VDD

50 kW to 200 kW

MSM6234RS

7/12

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