MH88612B Просмотр технического описания (PDF) - Zarlink Semiconductor Inc

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MH88612B

Subscriber Line Interface Circuit (SLIC)

Zarlink Semiconductor Inc 

MH88612B

Data Sheet

Current Limit

The Tip or Ring of the telephone line may accidentally be shorted to ground. In such a case, current will only flow

through the feed resistor. This high current will be sensed and reduced by the current limit circuit to a lower value to

protect the internal circuitry.

Power Denial

The power denial function is a feature of the MH88612B which allows for powering down of the subscriber loop. A

logic high voltage applied to the power denial input effectively removes the battery voltage from the loop driver

circuitry. The resulting ILOOP is negligible and power consumption is minimized. The power denial function is useful

for disabling a loop which may have a ground fault.

4

SEMICMF.019

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