MH88422
Data Access Arrangement
Data Sheet
Features
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FAX and Modem interface (V29)
Variants available with different line
impedances
Provides reinforced barrier to international PTT
requirements
Transformerless 2-4 Wire conversion.
Integral Loop Switch
Dial Pulse and DTMF operation
Line state detection outputs
Loop current/ringing outputs
Single +5 V operation, low on-hook power
(5 mW)
Full duplex data transmission
Ordering Information
MH88422-21
26 Pin DIL*
Boxed
March 2008
*Pb Free Matte Tin
0°C to 70°C
Description
The Zarlink MH88422 Data Access Arrangement
(D.A.A.) provides a complete interface between data
transmission equipment and a telephone line. All
functions are integrated into a single thick film hybrid
module which provides high voltage isolation, very high
reliability and optimum circuit design needing a
minimum of external components.
A number of variants are available to meet particular
country impedance requirements. The D.A.A. has been
designed to meet regulatory approvals requirements in
these countries.
Applications
Interface to Central Office or PABX line for:
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•
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Modem
FAX
Telemetry
Isolation Barrier
VDD
AGND
Opto-
Isolation
Opto-
Isolation
TXIN
TF
RLS
Opto-
Isolation
Opto-
Isolation
Logic Input
Buffer
Audio
Buffer
Transhybrid
loss
cancellation
circuit
TIP
RING
Input Buffer
&
Line Termination
LC
VR
Audio
Buffer
Ring & Loop
Buffer
VX
RVLC
Network Connections
User Connections
Figure 1 - Functional Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2001-2008, Zarlink Semiconductor Inc. All Rights Reserved.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
