MT91610 Datasheet, PDF (1/20 Pages) Mitel Networks Corporation – Analog Ringing SLIC

Features
• Transformerless 2W to 4W conversion
• Controls battery feed to line
• Programmable line impedance
• Programmable network balance impedance
• Off-hook and dial pulse detection
• Protects against GND short circuit
• Programmable gain
• Programmable constant current mode with
constant voltage fold over
• Transformerless balanced ringing with
automatic ring trip circuit. No mechanical relay
• Supports low voltage ringing
• Line polarity reversal
• On-hook transmission
• Power down and wake up capability
• Meter pulse injection
• Ground Key detection
Applications
Line interface for:
• PABX
• Intercoms
• Key Telephone Systems
• Control Systems
DS5181
MT91610
Programmable Ringing SLIC
Preliminary Information
ISSUE 6
July 2001
Package Information
MT91610AQ 36 Pin QSOP Package
-40°C to +85°C
Description
The Zarlink MT91610, with an external bipolar driver
(Figure 4), provides an interface between a switching
system and a subscriber loop. The functions
provided by the MT91610 include battery feed,
programmable constant current with constant
voltage fold over for long loops, 2W to 4W
conversion, off-hook and dial pulse detection, direct
balance ringing with built in ring tripping, unbalance
detection, user definable line and network balance
impedance’s and gain, and power down and wake
up. The device is fabricated as a CMOS circuit in a
36 pin QSOP package.
PD
RV RC
GTX1 ESE ESI GTX0
TD
Tip Drive
Controller
Ringing
Controller
Audio Gain & Network
Balance Circuit
VX
VR
TF
TIP
RING
RF
Line Sense
2 W to 4 W
Conversion & Line
Z3
Z2
Impedance
Z1
Over-Current
Protection Circuit
RD
Ring Drive
Controller
Loop Supervision
CP5
Line
LR
Reverse
Driver
CP4 CP6 CP7
Figure 1 - Functional Block Diagram
1