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E-STLC3055N Fiches technique(PDF) 2 Page - STMicroelectronics |
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E-STLC3055N Fiches technique(HTML) 2 Page - STMicroelectronics |
2 / 25 page STLC3055N 2/25 2 DESCRIPTION (continued) The battery level is properly adjusted depending on the operating mode. A useful characteristic for these applications is the integrated ringing generator. The control interface is a parallel type with open drain output and 3.3V logic levels. The metering pulses are generated on chip starting from two logic signals (0, 3.3V) one define the meter- ing pulse frequency and the other the metering pulse duration. An on chip circuit then provides the proper shaping and filtering. Metering pulse amplitude and shaping (rising and decay time) can be programmed by external components. A dedicated cancellation circuit avoid possible CODEC input saturation due to Metering pulse echo. Constant current feed can be set from 20mA to 40mA. Off-hook detection threshold is programmable from 5mA to 9mA. The device, developed in BCDIIIS technology (90V process), operates in the extended temperature range and integrates a thermal protection that sets the device in power down when Tj exceeds 140°C. Figure 3. Pin Connection Table 2. Absolute Maximum Ratings (1) Vbat is self generated by the on chip DC/DC converter and can be programmed via RF1 and RF2. RF1 and RF2 shall be selected in order to fulfil the a.m limits (see External Components Table page 10) Symbol Parameter Value Unit Vpos Positive Supply Voltage -0.4 to +13 V A/BGND AGND to BGND -1 to +1 V Vdig Pin D0, D1, D2, DET, CKTTX -0.4 to 5.5 V Tj Max. junction Temperature 150 °C Vbtot (1) Vbtot=|Vpos|+|Vbat|. (Total voltage applied to the device supply pins). 90 V ESD RATING Human Body Model ±1750 V Charged Device Model ±500 V 1 2 3 5 6 4 7 8 9 10 17 11 18 19 20 21 22 44 43 42 41 39 40 38 37 36 35 34 28 27 26 24 23 25 33 32 31 29 30 N.C. GAIN SET PD D1 D0 D2 CTTX2 CTTX1 CKTTX N.C. DET RLIM AGND CVCC RSENSE GATE VPOS CSVR ILTF RD IREF RTH D00TL488-MOD 12 13 14 15 16 |
Numéro de pièce similaire - E-STLC3055N |
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Description similaire - E-STLC3055N |
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