MT91610 Datasheet, PDF (1/18 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
Analog Ringing SLIC
Preliminary Information
ISSUE 2
February 2000
Package Information
MT91610AQ 36 Pin QSOP Package
-40°C to +85°C
Description
The Mitel 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 loop, 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.
RV PD
TD
Tip/Ring Drive
RD
Controller
TIP
RING
RF1, RF2
RC
CP4
CP6
CP7
Line Sense
Over-Current
Protection Circuit
Ring Drive
Controller
GTX1 ESE ESI GTX0 VX
Audio Gain & Network
Balance Circuit
VR
Z3
2 W to 4 W
Conversion & Line
Z2
Impedance
Loop Supervision
CP5
Line
LR
Reverse
Driver
Figure 1 - Functional Block Diagram
1