MH88435-P Datasheet, PDF (1/16 Pages) Mitel Networks Corporation – Data Access Arrangement Preliminary Information

Features
• FAX and Modem interface V.34(33k6)
• Externally programmable line and network
balance impedances
• Programmable DC termination characteristics
• IEC950 recognised component
• Transformerless 2-4 Wire conversion
• Integral Loop Switch
• Dial Pulse and DTMF operation
• Accommodates parallel phone detection
• Line state detection outputs:-
loop current/ringing voltage/line voltage
• Single +5V operation, low on-hook power
(35mW)
• Full duplex voice and data transmission
• On-Hook reception from the line
• Approvable to UL1950
• Industrial temperature range available
Applications
Interface to Central Office or PABX line for:
• FAX/Modem (including software modems)
• Electronic Point of Sale
• Security System
• Telemetry
• Set Top Boxes
MH88435-P
Data Access Arrangement
Preliminary Information
DS5132
ISSUE 8
July 1999
Package Information
MH88435AD-P
28 Pin DIL Package
MH88435AS-P
28 Pin SM Package
0°C to +70°C
MH88435AS-PI
28 Pin SM Package
MH88435AD-PI
28 Pin DIL Package
-40°C to +85°C
Description
The Mitel MH88435 Data Access Arrangement
(D.A.A.) provides a complete interface between
audio or 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.
The impedance and network balance are externally
programmable, as are the DC termination
characteristics, making the device suitable for most
countries worldwide.
TIP
RING
Input Buffer
&
Line Termination
Isolation Barrier
Opto-
Isolation
Logic Input
Buffer
Isolation
Analog
Buffer
VLOOP1
VLOOP2
Isolation
Analog
Buffer
Isolation
Ring & Loop
Buffer
THL cancellation
and line
impedance
matching circuit
Network Connections
User Connections
Figure 1 - Functional Block Diagram
VCC
VBIAS
AGND
LC
VR+
VR-
NB1
NB2
VX
ZA
RV
LCD
LOOP
RS
2-39