MH88632

Features:

• Loop start and ground start capabilities
• Transformerless 2-4 wire conversion
• Programmable transmit/receive gain with 0dB defaults
• Programmable input impedance with 600 and 900 defaults
• Programmable network balance with 600, 900, and AT&T compromise default
• One loop start & two ground start relay drivers
• Line state detection outputs
• Forward loop, reverse loop, ring ground, tip ground, ringing voltage
• +5V operation
• On-hook audio reception (to accommodate ANI)


Application

Interface to Central Office for:
• PBX
• Key Telephone System
• Channel bank
• Voice Mail
• Terminal Equipment
• Digital Loop Carrier


Pinout




Specifications

	Parameter	Sym	Min	Max	Units
1	DC Supply Voltages	VDD	-0.3	7	V
		VEE	0.3	-7	V
2	DC Ring Relay Voltage	VRLY	-0.3	20	V
3	Storage Temperature	TS	-55	+125	°C

Description

The Mitel MH88632 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 MH88632 include 2-4 Wire Hybrid conversion, programmable transmit and receive gains, programmable line impedance and programmable network balance. The MH88632 is fabricated using thick film hybrid technology which incorporates various technologies for optimum circuit design and very high reliability.