MH88622

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


Application

• Pair Gain
• CT2
• Cordless local loops


Pinout




Specifications

	Parameter	Symbol	Min	Max	Units
1	Supply Voltages - Referenced to VSS (GND)	VEE	+0.3	-15	V
		VDD	-0.3	+15	V
		VDCRI	-0.3	+180	V
		VBat	-60	0.3	V
2	Operating Temperature	TAMB	-40	+85	°C
3	Storage Temperature	TS	-55	+125	°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. MH88622 solution can be implemented with minimal external components. Different variants are provided to meet different country line impedance, they are:
-1                      220  + (820  // 115nF)
-2                      600
-3                      370  + (620  // 310nF)
-5                      200 + (680  // 100nF)