MH88612B
Subscriber Line Interface Circuit (SLIC)
Data Sheet
Features
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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 driver
Power Denial
Wide Operating Range
DS5752
Issue 1
May 2002
Ordering Information
MH88612BV-2
20 Pin SIL Package
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 and dial pulse detection. The
device is fabricated using thick film hybrid technology
in a 20-pin single in-line package.
Applications
Line interface for:
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PABX
Intercoms
Key Telephone Systems
Control Systems
LPGND
VBAT PD VCC VEE AGND
Power
Management
TF
TIP
RING
RF
Current and
Voltage
Sensing
2-Wire to
4-Wire
Conversion
VR
VX
RV
VRLY
RC
RD
CD
Over Current
Protection
Relay
Drive
Circuit
Constant
Current
Feed
Loop
Supervision
VREF
CAP
SHK
Figure 1 - Block Diagram
SEMICMF.019
1
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
