STLC3075 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STLC3075

Integrated POTS interface for home access gateway and WLL

STMicroelectronics 

STLC3075

8

Typical state diagram

Typical state diagram

Figure 23. Typical state diagram for STLC3075 operation

Tj>Tth

Normally used for

On Hook Transmission

PD=0, D0=D1=0

Power

Down

Active

On Hook

Ring Burst

Ring Burst

D0=1, D1=0,

D2=0/1

Ring Pause

D0=0, D1=1,

D2=0

Ringing

PD=1,

D0=D1=0

HI-Z

Feeding

On Hook Condition

On Hook Detection for T>Tref

Active

Off Hook

Ring Trip

Detection

Off Hook Detection

D0=0, D1=1,

D2=0

Note: all state transitions are under the microprocessor control.

Off Hook Detection

33/36

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