MH88600 Datasheet, PDF (1/14 Pages) Mitel Networks Corporation – Global SLIC Preliminary Information

MH88600
®
Global SLIC
Preliminary Information
Features
• Programmable line impedance matching
• Internal complex impedance networks
• Transformerless 2-4 wire conversion
• Programmable transmit/receive gain
• Accommodates worldwide transmission
standards
• Operates with a wide range of battery voltages
• Adjustable constant current battery feed
• Overvoltage and short circuit protection
• Switch hook and ground button detection
• Ring trip filter and relay driver
• Low power consumption
• High power dissipation capability during fault
conditions
ISSUE 7
April 1995
Ordering Information
MH88600
40 Pin DIL Hybrid
0°C to 70°C
Description
The MH88600 is a SLIC (Subscriber Line Interface
Circuit) which provides all of the BORSCH functions
of Battery Feed, Overvoltage Protection, Ringing
Feed, Line Supervision and 2-4 Wire Hybrid
conversion. In addition, the device matches the
many different line impedances specified by
regulatory authorities of around the world.
Applications
Line interface for:
• PABXs
• Control Systems
• Key Telephone Systems
• Central Office Equipment
VREF LCA ZN14 ZN13.................ZN8 ZN7.....................ZN1 ^ZN0
TF1
TF2
TIP
RING
RF1
RF2
Tip Drive
Over Voltage &
Short Circuit
Protection
Ring Drive
Constant
Current
Battery Feed
Impedance Matching Network
2-4 Wire
Hybrid
Circuit
Gain Adjust
Ring Trip Filter
Line Supervision
Relay Driver
PG2
PG4
TX
PG3
PG1
EGB SHK
Figure 1 - Functional Block Diagram
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