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MH88634-2 Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MH88634-2 Datasheet(HTML) 1 Page - Mitel Networks Corporation |
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1 / 8 page  2-253 ® Features • Loop Start Trunk Interface • 600 ohm input impedance, -2 variant • Line state detection outputs: forward loop, reverse loop, ringing voltage, switch hook On-hook reception • Transformerless 2W to 4W conversion • One loop start relay driver • +/- 5V operation • Small footprint area (<4.75cm2) Applications Interface to Central Office for: • PABX • Key Telephone Systems • Channel Bank •Voice Mail • Terminal Equipment • Digital Loop Carrier • Optical Multiplexer Description The Mitel MH88634 Central Office Trunk Interface circuit provides a complete audio and signalling link between audio switching equipment and a central office. The functions provided by the MH88634 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. Figure 1 - Functional Block Diagram Status Detection Transmit Gain 2-4 Wire Hybrid Dummy Ringer Loop Termination Loop Relay Driver Impedance Matching Network Balance XLA XLB XLC XLD LRC LRD VRLY RGND RING TIP RV FL RL SHK VDD VEE AGND Rx Tx Receive Gain ISSUE 2 April 1995 Ordering Information MH88634-2 21 Pin SIL Package 0 °C to 70°C MH88634 Central Office Interface Circuit Preliminary Information |
Similar Part No. - MH88634-2 |
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Similar Description - MH88634-2 |
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