STLC30R81 Datasheet, PDF (1/17 Pages) STMicroelectronics – INTEGRATED RINGING SLIC FOR SHORT LOOP APPLICATIONS

STLC30R81
INTEGRATED RINGING SLIC
FOR SHORT LOOP APPLICATIONS
■ 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
DESCRIPTION
The STLC30R81 is a low voltage SLIC suitable for
short loop applications. All the BORSHT and test
TQFP44 (10 x 10) with slug
ORDERING NUMBER: STLC30R81
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 CO-
DEC’s functionalities and characteristics Rxin+/Rxin-
or 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 mak-
ing unnecessary the use of any external power com-
ponents.
BLOCK DIAGRAM
DET GDK/AL
CRT
D0
D1
D2
D3
CS
RES
RG+
RG-
RXin+
RXin-
ZB
TX
LINE STATUS
LOGIC
INTERFACE
&
DECODER
COMMANDS
SUPERVISION
ILT
ILL
LINE
INTERFACE
AC
PROCESSOR
REFERENCE
&
BIAS SWITCHING
AC+
DC
AC ₊
DC
DC
PROCESSOR
TIP
RING
RLPBK
BGND
ILTF
RLIM
RTH
January 2006
ZAC1 ZAC RS CAC IREF VCC VDD AGND
CREV CSVR RD
D01TL518
Rev. 2
1/17