MH88634CV-K
Central Office Interface Circuit
Data Sheet
Features
•
•
•
•
Loop Start Trunk Interface
600
Ω
2-4 Wire Conversion
Line state Detection Outputs:
• Forward Loop
•
•
•
•
•
•
•
Reverse Loop
Ringing Voltage
Switch Hook
•
•
Digital Loop Carrier
Optical Multiplexer
Ordering Information
MH88634CV-K1
21 Pin SIL*
Boxed
August 2006
*Pb Free Matte Tin
0°C to 70°C
One Relay Driver
On-Hook Reception
Small footprint area
Meets FCC Part 68 Leakage Current
Requirements
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 24 V 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
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
TIP
Dummy
Ringer
RING
LRC
LRD
Loop Relay
Driver
Line
Termination
2 - 4 Wire
Hybrid
Receive
Gain
RX
Transmit
Gain
Impedance
Matching
Network
Balance
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 2001-2006 Zarlink Semiconductor Inc. All Rights Reserved.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
