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STLC3055N Datasheet(PDF) 1 Page - STMicroelectronics |
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STLC3055N Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 34 page  February 2009 Rev 11 1/34 1 STLC3055N WLL and ISDN-TA subscriber line interface circuit Features ■ Monochip subscriber line interface circuit (SLIC) optimised for WLL and VoIP applications ■ Implement all key features of the BORSHT function ■ Single supply (5.5 V to 12 V) ■ Built in DC/DC converter controller ■ Soft battery reversal with programmable transition time. ■ On-hook transmission. ■ Programmable off-hook detector threshold ■ Metering pulse generation and filter ■ Integrated ringing ■ Integrated ring trip ■ Parallel control interface (3.3 V logic level) ■ Programmable constant current feed ■ Surface mount package ■ Integrated thermal protection ■ Dual gain value option ■ BCD III S, 90 V technology ■ -40 to +85 °C operating range Description The STLC3055N is a SLIC device specifically designed for wireless local loop (WLL) and ISDN- terminal adaptors (ISDN-TA) and VoIP applications. One of the distinctive characteristic of this device is the ability to operate with a single supply voltage (from 5.5 V to 12 V) 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 these applications is the integrated ringing generator. The control interface is a parallel type with open drain output and 3.3 V logic levels. The metering pulses are generated on chip starting from two logic signals (0 and 3.3 V) one define the metering 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 20 mA to 40 mA. Off-hook detection threshold is programmable from 5 mA to 9 mA. The device, developed in BCD III S technology (90 V process), operates in the extended temperature range and integrates a thermal protection that sets the device in power down when Tj exceeds 140 °C. LQFP44 Table 1. Device summary Order code Package Packing E-STLC3055N (1) 1. ECOPACK® (see Section 10) LQFP44 Tray www.st.com |
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Similar Description - STLC3055N_09 |
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