MH88612B Datasheet, PDF (1/10 Pages) Zarlink Semiconductor Inc – Subscriber Line Interface Circuit (SLIC)

MH88612B
Subscriber Line Interface Circuit (SLIC)
Data Sheet
Features
• 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
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
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.
LPGND
VBAT PD VCC VEE AGND
TF
TIP
RING
RF
RV
VRLY
RC
RD
CD
Relay
Drive
Circuit
Power
Management
Current and
Voltage
Sensing
2-Wire to
4-Wire
Conversion
Constant
Current
Feed
Over Current
Protection
Figure 1 - Block Diagram
Loop
Supervision
SHK
VR
VX
VREF
CAP
SEMICMF.019
1