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MH88612C Datasheet(PDF) 1 Page - Mitel Networks Corporation

Part # MH88612C
Description  Subscriber Line Interface Circuit Preliminary Information
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Manufacturer  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MH88612C Datasheet(HTML) 1 Page - Mitel Networks Corporation

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2-113
®
Features
•
Input impedance 200
Ω + 560Ω // 0.1µF
•
Transformerless 2-wire to 4-wire conversion
•
Battery and ringing feed to line
•
Off-hook and dial pulse detection
•
Ring ground over-current protection
•
Adjustable constant current feed
•
Relay drive output
•
Power VBat Denial
•
Wide Operating Range
•
Programmable Receive Gain
Applications
Line interface for:
•
PABX
•
Intercoms
•
Key Telephone Systems
•
Control Systems
Description
The SLIC provides a complete interface between a
switching system and subscriber loop. Functions
provided include battery feed and ringing feed to the
subscriber line, 2-Wire to 4-Wire hybrid interfacing,
constant current feed and dial pulse detection. The
device
is
fabricated
using
thick
film
hybrid
technology in a 20-pin single in-line package.
FIgure 1 - Functional Block Diagram
VBat
GS
VDD VEE GNDA
VR
VX
VRef
CAP
SHK
RD
RC
VRLY
RV
RF
RING
TIP
TF
Current & Voltage
Sensing
Relay
Drive
Circuit
Constant
Current
Feed
Over Current
Protection
2-Wire to
4-Wire
Conversion
Loop
Supervision
ISSUE 4
April 1995
Ordering Information
MH88612C
20 Pin SIL Package
0
°C to 70°C
MH88612C
Subscriber Line Interface Circuit
Preliminary Information


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