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DESCRIPTION

The ST SLIC KIT (L3000S/L3030)is a set of solid statedevices designedto integratemain of the functions needed to interface a telephone line. It consists of 2 integrated devices : the L3000S line interface circuit and the L3030 control unit.

■ PROGRAMMABLE DC FEEDING RESIS-TANCE AND LIMITINGCURRENT

(fourvalues available)

■ THREE OPERATING MODES :

STAND-BY, CONVERSATION, RINGING

■ NORMAL/BOOSTBATTERY,DIRECT/REVERSE POLARITY

■ SIGNALLING FUNCTION (off-hook/GND-key)

■ FILTERED OFF-HOOK DETECTION IN

STAND-BY (10ms)

■ QUICK OFF-HOOK DETECTION IN CONVERSATION (< 1ms)

FOR LOW DIAL PULSE DETECTION DISTORTION

■ HYBRID FUNCTION

■ RINGING GENERATION WITH QUASI ZERO

OUTPUT IMPEDANCE, ZERO CROSSING INJECTION

(no ext. relay needed) AND RING TRIP DETECTION

■ AUTOMATIC RINGING STOP WHEN OFFHOOK IS DETECTED

■ PARALLEL AND SERIAL DIGITAL INTERFACES

■ TELETAXESIGNALINJECTION(2VRMS/5VRMS)

■ LOW NUMBER OF EXTERNAL COMPONENTS

■ GOOD REJECTION OF THE NOISE ON BATTERY VOLTAGE

(20dB at 10Hz and 35dB at 1kHz)

■ POSSIBILITY TO WORK ALSO WITH HIGH

COMMON MODE CURRENTS

■ INTEGRATED THERMAL PROTECTION WITH

THERMAL OVERLOADINDICATION

■ SURFACE MOUNT PACKAGE

(PLCC44 + PowerSO-20)