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DESCRIPTION

The STLC30R81 is a low voltage SLIC suitable for short loop applications. All the BORSHT and test functions (phone detection, loop-back, short circuit detection) are integrated in this device. It provides three ringing modes: Sinusoidal, Trapezoidal and PWM waveform.

In sinusoidal ringing modes, depending on the CODEC’s functionalities and characteristics Rxin+/Rxinor Rg+/Rg- paths can be selected. When CODEC can manage low frequency signals Rxin+/ Rxin- will be used.

This device can also limit the peak current during On-Hook/Off-Hook transition and Ring-trip detection.

The device is based on BCD3S 90V technology and it can work at 3.3V power supply.

The TQFP44 Package with SLUG increases the SLIC performance in terms of power dissipation making unnecessary the use of any external power components.

■ MONOCHIP SLIC SUITABLE FOR SHORT LOOP APPLICATIONS

■ 3.3V SUPPLY

■ IMPLEMENTS ALL KEY FEATURES OF THE BORSHT FUNCTION

■ DIFFERENTIAL OR SINGLE-ENDED Rx INPUTS

■ INTEGRATED TRAPEZOIDAL WAVEFORM RINGING plus SINUSOIDAL and PWM WAVEFORM RINGING CAPABILITY

■ TWO SELECTABLE PATH FOR SINUSOIDAL RING INJECTION

■ SOFT BATTERY REVERSAL WITH PROGRAMMABLE TRANSITION TIME

■ ON HOOK TRANSMISSION

■ LOW POWER DISSIPATION IN ALL OPERATING MODES

■ AUTOMATIC DUAL BATTERY OPERATION

■ LOOP START, GROUND START FEATURES

■ SURFACE MOUNT PACKAGE

■ -40 TO +85°C OPERATING RANGE

■ TEST FUNCTION

■ NO EXTERNAL COMPONENTS FOR POWER DISSIPATION