MH88625 Datasheet, PDF (1/16 Pages) Mitel Networks Corporation – DID/OPS SLIC Preliminary Information

MH88625
®
DID/OPS SLIC
Preliminary Information
Features
• Programmable gain, network balance and
impedance
• Transformerless 2-4 wire conversion
• Constant current with constant voltage fallback
for long loop capability
• Pin compatible with MH88632 and MH88628
• Unbalance detection (Tip, Ring ground sensing)
• Auto ring trip
• On-Hook transmission (ANI) capability
• Compatible with requirements of CCITT,
DOC/FCC and CSA/UL
• Excellent power dissipation (SIL vertical
mounting)
• 12/16kHz meter pulse injection control
• Solid State TIP/RING reversals
ISSUE 6
April 1995
Ordering Information
MH88625
40 Pin SIL Package
0°C to 70°C
Description
The Mitel MH88625 SLIC provides all of the
functions required to interface 2-wire off premise
subscriber loops to a serial TDM, PCM, switching
network of a modern PBX. The MH88625 is
manufactured using thick-film hybrid technology
which offers high voltage capability, reliability and
high density resulting in significant printed circuit
board area savings. A complete line card can be
implemented with very few external components.
Applications
• On/Off Premise PBX Line Cards
• DID (Direct Inward Dial) Line Cards
• Central Office Line Cards
RING
RF1
RF2
TIP
TF1
TF2
UD
RNGC
RGND
VRLY
VBat LGND
LCA
VDD VEE
AGND
Matched
Feed
Resistors
Unbalance
Detection
Driver
Circuitry
And
Speech
Circuit
Ring
Relay
Driver
Tip/Ring
Reversal
External
Signal
Input
Loop
Current
Set
Switch-hook
Threshold Set
Switch-hook
Detect
Ring
Filter
Impedance
Network
2-4 Wire
Conversion
Gain Adjust
SHK
NS
N1
N2
NATT
RRD
REVC ESI ESE Z900 Z600 Z1 Z2 GRX1 GRX0 RX GTX1 GTX0 TX
FIgure 1 - Functional Block Diagram
2-183