MH88612BV-K

MH88612BV-K Subscriber Line Interface Circuit (SLIC) Advance Information Features Transformerless 2-wire to 4-wire conversion Battery and ringing feed to line. Off-hook and dial pulse detection. . Ring ground over-current protection. Constant current feed with constant voltage foldover. Relay driver. Power Denial. Wide Operating Range. Pin for pin compatible 600R and 900R variants. DS5066 ISSUE 2 January 1999 Ordering Information MH88612BV-K MH88612BV-4K 20 Pin SIL Package (600R) 20 Pin SIL Package (900R) 0° C to 70° C Description The SLIC provides a complete 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 feed with constant voltage foldback, and dial pulse detection. The device is fabricated using thick film hybrid technology in a 20-pin single in-line package. Applications Line interface for: PABX Intercoms Key Telephone Systems Control Systems LPGND VBAT PD VCC VEE AGND Constant Voltage Foldback Power Management TF TIP RING RF Current and Voltage Sensing 2-Wire to 4-Wire Conversion VR VX RV VRLY Over Current Protection Relay Drive Circuit Constant Current Feed Loop Supervision CAP RC RD CD SHK Figure 1 - Functional Block Diagram 1 MH88612BV-K TF LPGND VR IC VEE AGND PD VX TIP RING RF VCC RC RD RV VRLY CD VBAT CAP SHK Advance Information 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ...