STLC3055 STMicroelectronics, STLC3055 Datasheet
STLC3055
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STLC3055 Summary of contents
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... FTTX RTTX October 1999 ORDERING NUMBERS: STLC3055Q 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) ...
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... STLC3055 DESCRIPTION (continued) these applications is the integrated ringing gener- ator. The control interface is a parallel type with open drain output and 3.3V logic levels. The metering pulses are generated on chip start- ing from two logic signals (0, 3.3V) one define the metering pulse frequency and the other the me- tering pulse duration ...
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... RD DC feedback and ring trip input. RD should be connected close to this pin and PCB layout should avoid noise injection on this pin. Parameter Parameter Typ. Function input impedance. This signal is referred to AGND. If STLC3055 Value Unit 5.5 to +15.8 V -100 to +100 V -0.25 to 5.25 V -40 to +85 C -74 max ...
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... Feedback input for DC/DC converter controller. 22 CLK Power Switch Controller Clock (typ. 125KHz). From version marked STLC3055 A5, this pin can also be connected to CVCC or AGND. When the CLK pin is connected to CVCC an internal auto-oscillation is internally generated and it is used instead of the external clock. ...
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... This mode can be selected in emergency condi- tion when it is necessary to cut any current deliv- ered to the line. This mode is also forced by STLC3055 in case of thermal overload (Tj > 140 C). In this case the device goes back to the previous status as soon as the junction temperature de- crease under the hysteresis threshold ...
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... STLC3055 Figure 2. DC characteristic in ACTIVE mode IL Ilim (20 to 40mA) 2Rp 10V The line status (on/off hook) is monitored by the SLIC’s supervision circuit. The off-hook threshold can be programmed via the external resistor R in the range from 5mA to 9mA. Independently on the programmed constant cur- rent value, the TIP and RING buffers have a cur- rent source capability limited to 70mA typ ...
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... TIP/RING pins at the TTX frequency. Cut the eventual TTX echo that will be trans- ferred from the line to the TX output. Ringing When this mode is selected STLC3055 self gen- erate an higher negative battery (-70V typ.) in or- der to allow a balanced ringing signal of typically 65Vpeak. ...
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... D2 toggling in order to effectively disconnect the ring signal and then set the STLC3055 in the proper operating mode (normally ACTIVE). RING LEVEL IN PRESENCE OF MORE TELE- PHONE IN PARALLEL ...
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... Additional improvements can be obtained: decoupling the center of the star from the ana- log ground of STLC3055 using small chokes. adding a capacitor in the range of 100nF be- tween VPOS and AGND in order to filter the switch frequency on VPOS. ...
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... STLC3055 EXTERNAL COMPONENTS Name Function RREF Bias setting current CSVR Negative Battery Filter RD Ring Trip threshold setting resistor CAC AC/DC split capacitance RP Line protection resistor RS Protection and series switches resistance image ZAC Two wire AC impedance ZA (1) SLIC impedance balancing network ZB (1) ...
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... Vr > 100V, t 50ns RR RSENSE = 100mV Resistance 0.1 (9) 250K <RF1<300K (7) 280k 294kW 300k -48V -49V -50V -65V -68V -70V STLC3055 Typ. Value 100nF 10% 15VL SMBYW01-200 or equivalent 110m @I = 900mA PK L=125 H RFP1304PV (Manuf.: All Inductive) or SUMIDA CDRH125 or equivalent 220pF to 470pF (10) 300kW -70V BATR 9.1k 1% ...
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... BGND PGND VPOS CVCC CVPOS RSENSE AGND BGND CVCC VPOS RS RSENSE ZAC GATE ZAC1 VBAT ZB VF CLK CLK TIP STLC3055 RING DET D0 CSVR D1 CREV D2 CKTTX RTH CTTX1 RLIM CTTX2 IREF RREF FTTX RTTX CAC ILTF RD RD CRD AGND CAC BGND PGND ...
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... L at line terminals on ref. imped. 10 ACTIVE N. P 600 (*) L ACTIVE N. P 600 (*) -150 L 0dBm @ 1020Hz, -6.4 ACTIVE N. P 600 (*) L 0dBm @ 1020Hz, -0.4 ACTIVE N. P 600 (*) L rel. 1020Hz; 0dBm, -0.12 300 to 3400Hz, ACTIVE N. P 600 (*) L STLC3055 Typ. Max. Unit 3 dBm 150 mV -5 ...
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... STLC3055 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter G42f RX gain variation vs. freq. V2Wp Idle channel noise at line V2Wp Idle channel noise at line V4Wp Idle channel noise at line V4Wp Idle channel noise at line Thd Total Harmonic Distortion VTTX Metering pulse level on line CLKfreq CLK operating range ...
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... Vpos supply current @ Ipk Peak current limiting accuracy Test Condition Min. RING 20 RING -15 RING ACTIVE -1 2 -10 -10 Iol = 1mA Vripple = 100mVrms 4000Hz HI-Z On-Hook ACTIVE On-Hook, RING (line open) RING Off-Hook -20% RSENSE = 110m STLC3055 Typ. Max. Unit TBD 500 160 ...
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... STLC3055 STLC3055 Test Circuits Referring to the application diagram shown in fig the STLC3055 datasheet and using as external components the Typ. Values specified in the ”External Components” Table (page 13) find below the proper configuration for each measurement. All measurements requiring DC current termination should be performed using ”Wandel & Goltermann DC Loop Holding Circuit GH-1” ...
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... TIP TX STLC3055 application circuit RX RING W&G GH1 TIP STLC3055 100mA DC max application circuit Zin = 100K 200 to 6kHz RING W&G GH1 TIP 100 F STLC3055 100mA DC max application circuit Zin = 100K 200 to 6kHz 100 F RING VPOS ~ Vn STLC3055 Vtx TX RX Vrx TX RX 17/22 ...
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... F STLC3055 100mA DC max application Vl Zin = 100K 200 to 6kHz 100 F RING W&G GH1 100 F TIP 100 F STLC3055 100mA DC max application Zin = 100K 200 to 6kHz 100 F RING 100 F TIP TX STLC3055 application 200ohm circuit RX RING CKTTX fttx (12 or 16kHz) TX circuit RX TX circuit RX Vrx ...
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... Figure A9. V2Wp and W4Wp: Idle channel psophometric noise at line and TX. V2Wp = 20Log|Vl/0.774l|;V4Wp = 20Log|Vtx/0.774l| 600ohm Vl psophometric filtered STLC3055 Overvoltage Protection Figure B1. Simplified configuration for indoor overvoltage protection Figure B2. Standard overvoltage protection configuration for K20 compliance W&G GH1 TIP 100 F STLC3055 100mA ...
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... STLC3055 TYPICAL STATE DIAGRAM FOR STLC3055 OPERATION Figure C1. Tj>Tth PD=0, D0=D1=0 Power Down PD=1, D0=D1=0 HI-Z Feeding On Hook Condition Off Hook Detection Note: all state transitions are under the microprocessor control. 20/22 APPENDIX C Normally used for On Hook Transmission Active On Hook Ring Burst ...
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... STLC3055 21/22 ...
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... STLC3055 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...