MH89625C

Features:

• Input impedance variants:
    - 600
    - 200 + 680 // 0.1mF
    - 200 + 560 // 0.1mF
• Operates with a wide range of battery voltages
• Constant current battery feed with constant voltage fallback for long loop drive capabilities
• Overvoltage and short circuit protection
• Off-hook detection and LED indicator drive
• Dial pulse detection
• Ring trip filter with auto ring trip
• Ring relay driver plus three more uncommitted relay drivers
• Transformerless 2W to 4W conversion
• A/D and D/A conversion
• Conforms to A-Law PCM
• Analog and digital loopback
• Conforms to CCITT k.20 overvoltage surge requirements with external primary protection circuitry 


Application

• Off premise digital PBX line cards
• DID (Direct Inward Dial) line cards
• PABX, Key Systems, Central Office Equipment


Pinout




Specifications

	Parameter	Symbol	Min	Max	Units
1	DC Supply Voltage	VDD	-0.3	7	V
		VEE	0.3	-7
2	DC Battery Voltage	VBAT	0.3	-65	V
3	DC Ring Relay Voltage	VRLY	-0.3	7	V
4	DC Reference Voltage	VREF	-0.3	VDD	V
5	AC Ring Generator Voltage			150	VRMS
6	DC Digital Input Voltage	GS, CSTi DSTi, C2i F1i	-0.3	VDD	V
7	DC Digital (3-level) Input voltage	CA	VEE	VDD	V
8	Storage Temperature	TS	-40	+125	°C

Description

The Mitel MH89625C SLIC (Subscriber Line Interface Circuit) provides a complete interface between an off-premise telephone line and a digital switching system. All BORSCHT functions of Battery Feed, Overvoltage Protection, Ringing Feed, Line Supervision, Codec, 2-4 Wire Hybrid and Test MH89625C are provided requiring only a few external components.

The input impedance conforms with Chinese standard requirements. The MH89625C is fabricated using thick film hybrid technology which incorporates various technologies for high voltage capability, optimum circuit design and very high reliability.