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MH88612BV-K Datasheet, PDF (1/8 Pages) Mitel Networks Corporation – Subscriber Line Interface Circuit (SLIC) Advance Information | |||
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MH88612BV-K
Subscriber Line Interface Circuit (SLIC)
Advance Information
Features
DS5066
ISSUE 2
January 1999
⢠Transformerless 2-wire to 4-wire conversion
⢠Battery and ringing feed to line.
⢠Off-hook and dial pulse detection.
.
⢠Ring ground over-current protection.
⢠Constant current feed with constant voltage
foldover.
⢠Relay driver.
⢠Power Denial.
⢠Wide Operating Range.
⢠Pin for pin compatible 600R and 900R variants.
Applications
Line interface for:
⢠PABX
⢠Intercoms
⢠Key Telephone Systems
⢠Control Systems
Ordering Information
MH88612BV-K
MH88612BV-4K
20 Pin SIL Package (600R)
20 Pin SIL Package (900R)
0°C to 70°C
Description
The SLIC 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 feed with constant voltage foldback,
and dial pulse detection. The device is fabricated
using thick ï¬lm hybrid technology in a 20-pin single
in-line package.
TF
TIP
RING
RF
RV
VRLY
RC
RD
CD
Constant
Voltage
Foldback
LPGND
VBAT PD VCC VEE AGND
Power
Management
Current and
Voltage
Sensing
2-Wire to
4-Wire
Conversion
Relay
Drive
Circuit
Constant
Current
Feed
Over Current
Protection
Loop
Supervision
SHK
Figure 1 - Functional Block Diagram
VR
VX
CAP
1
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