Subscriber Line Interface Circuit (SLIC) Preliminary Information
MH88610
®
Subscriber Line Interface Circuit (SLIC) Preliminary Information
Features
• • • • • • Transformerless 2-wire...
Description
MH88610
®
Subscriber Line Interface Circuit (SLIC) Preliminary Information
Features
Transformerless 2-wire to 4-wire conversion Battery and ringing feed to line Off-hook and dial pulse detection Ring ground over-current protection Loop length detection Constant current feed MH88610
ISSUE 6
April 1995
Ordering Information 20 Pin SIL Package 0° C to 70° C
Description Applications
Line interface for: PABX Intercoms Key Telephone Systems Control Systems The Mitel MH88610 Subscriber Line Interface Circuit provides a complete interface between a switching system and a subscriber loop. Functions provided include battery feed and ringing feed to the subscriber line, 2-Wire to 4-Wire hybrid interfacing, constant current, loop length and dial pulse detection. The device is fabricated using thick film hybrid technology in a 20-pin single in-line package.
LPGND
VBat
VDD
VEE
GNDA
TF TIP RING RF RV
Current &Voltage Sensing
2-Wire to 4-Wire Conversion
VR VX
Over Current Protection Constant Current Feed Loop Supervision
VRef LOOP SHK CAP
Figure 1 - Functional Block Diagram
2-97
MH88610
TF LPGND VR VRef VEE GNDA LOOP VX TIP RING RF VDD IC IC RV IC NC VBat CAP SHK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Preliminary Information
Figure 2 - Pin Connections
Pin Description
Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name TF LPGND VR VRef VEE GNDA LOOP VX TIP RING RF VDD IC IC RV IC NC VBat CAP SHK Description TF Tip Feed. Internal ...
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