MH88634CV-K Datasheet, PDF (1/13 Pages) Zarlink Semiconductor Inc – Central Office Interface Circuit

Features
• Loop Start Trunk Interface
• 600Ω
• 2-4 Wire Conversion
• Line state Detection Outputs:
• Forward Loop
• Reverse Loop
• Ringing Voltage
• Switch Hook
• One Relay Driver
• On-Hook Reception
• Small footprint area
• Meets FCC Part 68 Leakage Current
Requirements
Applications
Interface to Central Office for:
• PABX
• Key Telephone Systems
• Channel Bank
• Voice Mail
• Terminal Equipment
RV FL RL SHK XLA XLB XLC XLD
Status
Detection
MH88634CV-K
Central Office Interface Circuit
Data Sheet
September 2003
Ordering Information
MH88634CV-K 21 Pin SIL Package
0°C to 70°C
• Digital Loop Carrier
• Optical Multiplexer
Description
The Zarlink MH88634CV-K Central Office Interface
Circuit trunk provides a complete analog and signalling
link between audio switching equipment and a
telephone line.
The device is fabricated as a thick film hybrid
incorporating various technologies for optimum circuit
design and very high reliability.
The component design has been changed to improve
the general performance of the part. It is also now
capable of operating at a 24V battery and on hook
reception.
The main difference between the MH88634BV-2 and
MH88634CV-K is that SHK is active high on the CV-K.
VCC VEE AGND
TIP
RING
LRC
LRD
Dummy
Ringer
Loop Relay
Driver
Line
Termination
2 - 4 Wire
Hybrid
Impedance
Matching
Network
Balance
Receive
Gain
RX
Transmit
Gain
TX
VRLY
Figure 1 - Functional Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2003, 2001 Zarlink Semiconductor Inc. All Rights Reserved.