MH88511

® MH88510/11 Subscriber Line Interface Circuit (SLIC) Preliminary Information Features High Gain version MH88511 Compatible with popular MH88500 Operates with a wide range of battery voltages Constant current battery feed Dry line compatible Overvoltage and short circuit protection Ringing Feed Off-hook detection and LED indicator drive Dial pulse detection Ring trip filter with auto ring trip Relay driver Transformerless 2-2 wire conversion Low power consumption Mute of incoming audio Few external components ISSUE 1 April 1995 Ordering Information MH88510 MH88511 20 Pin SIL Package 20 Pin SIL Package 0° C to 70° C Description The Mitel MH88510/11 Subscriber Line Interface Circuit provides a complete interface between the telephone line and a speech switch requiring only single bidirectional switch per crosspoint. The functions provided by the MH88510/11 include bidirectional differential to single ended conversion in the speech path, line battery feed, ringing feed and loop and dial pulse detection. The device is fabricated as a thick film hybrid which incorporates various technologies for optimum circuit board and very high reliability. Applications Line Interface for: PABX Intercoms Key Systems TF TIP Tip Drive 2-2 Wire Hybrid Current & Voltage Sensing Constant Current/Voltage Control MUTE JUNC Ring Trip Filter RING RF Ring Short Protection Line Supervision Relay Driver VBAT AGND VDD VEE SHK LED RRC RRD VRLY RGND F...