MH88634

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)


Application

Interface to Central Office for:
• PABX
• Key Telephone Systems
• Channel Bank
• Voice Mail
• Terminal Equipment
• Digital Loop Carrier
• Optical Multiplexer


Pinout




Specifications

	Parameter	Sym	Min	Max	Units
1	DC Supply Voltages)	VBAT	0	-60	V
		VDD	-0.3	7	V
		VEE	0.3	-7	V
2	DC Ring Relay Voltage	VRLY	-0.3	7	V
3	Storage Temperature	TS	-55	+125	°C

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.