MH88622

® MH88622 DUAL OPS SLIC Preliminary Information Features Dual SLIC Ringing generation On-hook transmission Transformerless 2-4 wire conversion Constant current feed Battery Feed to the line Tip Ring reversal capability Over current protection Off-Hook detection Logic interface for SHK, RC, LR, ESE, LCS Metering injection Wide V Bat operating range Minimum installation space ESE ramped output ISSUE 3 April 1995 Ordering Information MH88622 -1, -2, -3,-5 40 Pin SIL Package 0° C to 70° C Description The Mitel MH88622 is a Dual Subscriber Interface Circuit which provides a complete interface between the telephone lines a dual codec, requiring a dual rail supply, battery and dc supply for ringing generation. The functions provided by the MH88622 includes 2-4 Wire conversion, constant current line feed, signalling and control. The SLIC manufactured using thick film hybrid technology which offers high voltage capability, reliability and high density resulting in a significant area saving on the printed circuit board. A complete C.O. type solution can be implemented with minimal external components. Different variants are provided to meet different country line impedance, they are: -1 -2 -3 -5 220 Ω + (820 Ω // 115nF) 600 Ω 370 Ω + (620 Ω // 310nF) 200Ω + (680 Ω // 100nF) Applications Pair Gain CT2 Cordless local loops SHK1 LCS1 LCS2 SHK2 Loop Supervision Over Current Protection & Constant Current Feed Over Current Protection & Constant ...