MH88610 Overview
Applications Line interface for: • • • • PABX Inters Key Telephone Systems Control Systems The Mitel MH88610 Subscriber Line Interface Circuit provides a plete interface between a switching system and a subscriber loop. Functions provided include battery feed and ringing feed to the subscriber line, 2-Wire to 4-Wire hybrid interfacing, constant current, loop length and dial pulse detection. The device is fabricated using thick film hybrid technology in a 20-pin single in-line package. LPGND VBat VDD VEE GNDA TF TIP RING RF RV Current &Voltage Sensing 2-Wire to 4-Wire Conversion VR VX Over Current Protection Constant Current Feed Loop Supervision VRef LOOP SHK CAP Figure 1 - Functional Block Diagram 2-97 MH88610 Functional The MH88610 performs a transformerless 2-wire to 4-wire conversion of the analog signal. The 2-wire circuit is the bala
MH88610 Key Features
- Transformerless 2-wire to 4-wire conversion Battery and ringing feed to line Off-hook and dial pulse detection Ring grou