STLC3055 Datasheet, PDF (1/22 Pages) STMicroelectronics – WLL & ISDN-TA SUBSCRIBER LINE INTERFACE CIRCUIT

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STLC3055
WLL & ISDN-TA SUBSCRIBER LINE INTERFACE CIRCUIT
MONOCHIP SLIC OPTIMISED FOR WLL &
ISDN-TA APPLICATIONS
IMPLEMENT ALL KEY FEATURES OF THE
BORSHT FUNCTION
SINGLE SUPPLY (5.5 TO 15.8V)
BUILT IN DC/DC CONVERTER CONTROL-
LER.
SOFT BATTERY REVERSAL WITH PRO-
GRAMMABLE TRANSITION TIME.
ON-HOOK TRANSMISSION.
PROGRAMMABLE OFF-HOOK DETECTOR
THRESHOLD
METERING PULSE GENERATION AND FIL-
TER
INTEGRATED RINGING
INTEGRATED RING TRIP
PARALLEL CONTROL INTERFACE (3.3V
LOGIC LEVEL)
PROGRAMMABLE CONSTANT CURRENT
FEED
SURFACE MOUNT PACKAGE
INTEGRATED THERMAL PROTECTION
-40 TO +85°C OPERATING RANGE
BLOCK DIAGRAM
D0 D1 D2
TQFP44
ORDERING NUMBERS: STLC3055Q
STLC3055QTR
DESCRIPTION
The STLC3055 is a SLIC device specifically de-
signed for WLL (Wireless Local Loop) and ISDN-
Terminal Adaptors. One of the distinctive charac-
teristic of this device is the ability to operate with
a single supply voltage (from +5.5V to +15.8V)
and self generate the negative battery by means
of an on chip DC/DC converter controller that
drives an external MOS switch.
The battery level is properly adjusted depending
on the operating mode. A useful characteristic for
DET
October 1999
TX
RX
ZAC1
ZAC
RS
ZB
CKTTX
CTTX1
CTTX2
FTTX
INPUT LOGICAND DECODER
Status and functions
AC PROC
SUPERVISION
OUTPUT LOGIC
LINE
DR IVER
OUTPUT
STAGE
BGND
TIP
RING
TTX PROC
REFERENCE ^Vcc
Vss
A gnd
RTTX CAC ILTF RD IREF RLIM RTH
DC PROC
CR EV
CSVR
D C/DC
C ONV.
CLK
R SENSE
GATE
VF
VOLT.
REG.
Vba t
CVCC
VPOS
VBAT
AGND
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