HC55185 Datasheet | Renesas

Vo IP Ringing SLIC Family FN4831 Rev 15.00 February 9, 2012 The RSLIC-Vo IP family of ringing subscriber line interface circuits (RSLIC) supports analog Plain Old Telephone Service (POTS) in short and medium loop length, wireless and wireline applications. Ideally suited for remote subscriber units, this family of products offers flexibility to designers with high ringing voltage and low power consumption system requirements. The RSLIC-Vo IP family operates to 100V, which translates directly to the amount of ringing voltage supplied to the end subscriber. With the high operating voltage, subscriber loop lengths can be extended to 500 (i.e., 5,000 feet) and beyond. Other key Features across the product family include: low power consumption, ringing using sinusoidal or trapezoidal waveforms, robust auto-detection mechanisms for when subscribers go on or off hook, and minimal external discrete application ponents. Integrated test access Features are also offered on selected products to support loopback testing as well as line measurement tests. There are five product offerings of the HC55185 with each version providing voltage grades of high battery voltage and longitudinal balance. The voltage feed amplifier design uses low fixed loop gains to achieve high analog performance with low susceptibility to system induced noise. Block Diagram POL CDC VBL VBH ILIM DC CONTROL BATTERY SWITCH RINGING PORT TIP RING 2-WIRE PORT TRANSIENT CURRENT LIMIT SW+ SW- TEST ACCESS TRANSMIT SENSING DETECTOR LOGIC RTD RD E0 DETALM 4-WIRE PORT VRX VTX -IN VFB CONTROL LOGIC F2 F1 F0 BSEL SWC Features - Onboard Ringing Generation - patible with Existing HC5518x...