MH88617
Programmable SLIC with Ringing Amplification
Advance Information
Features
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Fully programmable line impedance,network
balance impedance and gains
Programmable loop current with long loop
capability
2-4 Wire conversion
Power down and wake up
Battery feed to line with wide operating range
Off-hook and dial pulse detection
Over-current protection
Integral ringing amplifier with auto ring trip
Tip/Ring reversal
Meter pulse injection
On-hook transmission to the line capability
Relay driver
Short loop ringing capability with low voltage
DC supply
DS5037
ISSUE 4
May 1999
Ordering Information
MH88617AV-PI 21PIN SIL Package
MH88617AD-PI 28PIN DIL Package
MH88617AS-PI 28PIN SM Package
MH88617AT-PI 21PIN 90° L/F Package
-40°C to 85°C
Description
The Mitel MH88617 is a highly featured, low cost
Subscriber Line Interface Circuit (SLIC). It provides a
total analog transmission and signalling link between
a CODEC and a subscriber line. All functions are
integrated into a single thick film hybrid module,
which provides high reliability and optimum circuit
design needing a minimum of external components.
The line impedance, network balance impedance,
gain and loop current are all externally
programmable, making the device suitable for a wide
range of applications worldwide.
Applications
Line interface for:
• PABX/Key Telephone System
• Analog Terminal Adaptors
• Pair Gain System
• Fibre in the Loop/Wireless Local Loop
VBAT
VCC VEE
GND
LCA
LR
Power
Management
Reversal
GVX
Constant
Current Control
2 - 4 Wire
Conversion
Supervision
Programmable
Impedance
ZA
Gain Adjust
& Programmable
Network Balance
TIP
VX
VR
TIP / RING
Drive and
RING
Sense
Ringing Control
and
Amplifier
Auto Ring Trip
Metering
Injection
Relay Driver
RDI
RC
RV DCRI
SHK
ESI
ESE
RDO
Figure 1 - Functional Block Diagram
2-157
MITEL [ MITEL NETWORKS CORPORATION ]
