MH88617

Features:

• Fully programmable line impedance,network balance impedance and gains
• Programmable loop current with long loop capability
• 2-4 Wire conversion
• Power down and wake up
• Battery feed to line with wide operating range
• Off-hook and dial pulse detection
• Over-current protection
• Integral ringing amplifier with auto ring trip
• Tip/Ring reversal
• Meter pulse injection
• On-hook transmission to the line capability
• Relay driver
• Short loop ringing capability with low voltage DC supply


Application

Line interface for:
• PABX/Key Telephone System
• Analog Terminal Adaptors
• Pair Gain System
• Fibre in the Loop/Wireless Local Loop


Pinout




Specifications

	Parameter		Sym	Min	Max	Units
1	DC Supply Voltage		VCC	-0.3	6	V
			VEE	-6	0.3	V
2	DC Battery Voltage		VBAT	-75	0.3	V
3	DC Ringing Voltage		VDCRI	-0.7	150	V
4	DC Reference Voltage		LCA	-0.3	6	V
5	Relay Driver Voltage		RDO	-0.3	15	V
6	Relay Driver Coil Resistance			230
7	Ringing Input Voltage		RV	0	3	Vrms Note 1
8	Maximum Power Handling Capacity (Off-hook)	@ 25°C	PD		2250	mW
		@ 70°C			1530	mW
		@ 85°C			1290	mW
9	Storage Temperature		TS	-55	+125	°C

Description

The Mitel MH88617 is a highly featured, low cost Subscriber Line Interface Circuit (SLIC). It provides a total analog transmission and signalling link between a CODEC and a subscriber line. All functions of MH88617 are integrated into a single thick film hybrid module, which provides high reliability and optimum circuit design needing a minimum of external components.

The line impedance, network balance impedance, gain and loop current are all externally programmable, making the MH88617 suitable for a wide range of applications worldwide.