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MH88500 Datasheet(PDF) 1 Page - Mitel Networks Corporation

Part No. MH88500
Description  Hybrid Subscriber Line Interface Circuit (SLIC) Preliminary Information
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Maker  MITEL [Mitel Networks Corporation]
Homepage  http://www.mitel.com
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MH88500 Datasheet(HTML) 1 Page - Mitel Networks Corporation

 
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2-33
®
Features
Differential to single ended conversion
No transformers required
Minimum installation space
Off-Hook detection and LED indicator drive
Relay drive output
Battery and ringing feed to line
Logic interface: MUTE, OFHK, RC
Mute of incoming audio
Dial pulse detection
Voltage surge protection
Applications
Line Interface for:
PABX
Intercoms
Key Systems
Description
The Mitel MH88500 Subscriber Line Interface Circuit
provides a complete interface between the telephone
line and a speech switch requiring only single
bidirectional switch per crosspoint. The functions
provided
by the MH88500
include bidirectional
differential to single ended conversion in the speech
path, line battery feed, ringing feed and loop and dial
pulse detection. The device is fabricated as a thick
film
hybrid
in a 20-pin ‘single-in-line’ package
allowing optimum circuit board packing density.
Figure 1 - Functional Block Diagram
JUNCTOR
MUTE
OFHK
LED
THRESH ADJ
VC2
VA2
VB
VC1
GND
VA1
TIP
RING
RING
FEED
CD
RD
RC
RGND
VA2
VB
Speech Circuit
Loop Detection
Loop Feed/
Ring Feed
Relay Drive
Circuit
ISSUE 5
April 1995
Ordering Information
MH88500
20 Pin SIL Package
0
°C to 70°C
MH88500
Hybrid Subscriber Line Interface Circuit (SLIC)
Preliminary Information


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