MH88634K Datasheet | Mitel Networks

Features - - - Loop Start Trunk Interface 600 Ohm input impedance Line state detection outputs: - forward loop - reverse loop - ringing voltage - service out Transformerless 2W to 4W conversion One loop start relay driver +/- 5V operation MH88634K ISSUE 3 April 1995 Ordering Information 21 Pin SIL Package 0° C to 70° C - - - Description The Mitel MH88634K Central Office Trunk Interface circuit provides a plete audio and signalling link between audio switching equipment and a central office. The functions provided by the MH88634K include 2-4 Wire conversion, 600 Ohm input impedance and network balance. The device is fabricated as a thick film hybrid incorporating various technologies for optimum circuit design and very high reliability. Applications Interface to Central Office for: - - - - - - - PABX Key Telephone Systems Channel Bank Voice Mail Terminal Equipment Digital Loop Carrier Optical Multiplexer RING VDD VEE AGND Dummy Ringer Status Detection XLA XLB XLC XLD LRC LRD Loop Termination Receive Gain Rx - 4 Wire Hybrid Loop Relay Driver Impedance Matching Network Balance Transmit Gain Tx VRLY RGND Figure 1 - Functional Block...