MH88610 Datasheet, PDF (1/8 Pages) Mitel Networks Corporation – Subscriber Line Interface Circuit (SLIC) Preliminary Information

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
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
ISSUE 6
April 1995
Ordering Information
MH88610
20 Pin SIL Package
0°C to 70°C
Description
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.
TF
TIP
RING
RF
RV
LPGND
VBat
VDD VEE GNDA
Current &Voltage
Sensing
Constant
Current
Feed
Over Current
Protection
2-Wire to
4-Wire
Conversion
Loop
Supervision
Figure 1 - Functional Block Diagram
VR
VX
VRef
LOOP
SHK
CAP
2-97