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Maxim > Design Support > Technical Documents > Application Notes > T/E Carrier and Packetized > APP 3916
Keywords: T1, E1, LIU, line interface unit, octal, short haul
APPLICATION NOTE 3916
DS26303 Short-Haul Line Interface Unit vs.
IDT82V2048
Sep 22, 2006
Abstract: This document provides an explanation of the differences between the DS26303 and the
IDT82V2048 with emphasis on the information required to use the DS26303 in an existing IDT82V2048
application. Descriptions of the feature differences, register considerations, and hardware considerations
are provided.
Introduction
This document provides an explanation of the differences between the DS26303 and the IDT82V2048
with emphasis on the information required to use the DS26303 in an existing IDT82V2048 application.
The DS26303 is an 8-channel short-haul line interface unit (LIU) that supports E1/T1/J1 from a single
3.3V power supply. This device supports the functions of the IDT82V2048 without software modification,
while providing additional features. The DS26303 can be used in an existing IDT82V2048 application
without changing PCB layout, but by simply replacing external component values for the desired
application.
Descriptions of the feature differences are provided in three separate sections. Table 1 provides a list of
DS26303 features not present in the IDT82V2048. Table 2 gives a list of IDT82V2048 features not
present in the DS26303. Table 3 provides a list of features present in both the DS26303 and
IDT82V2048 that are not implemented the same on both devices.
The differences between registers of the DS26303 and IDT82V2048 are described in Tables 6 through
10, along with the additional functionality provided by additional register banks of the DS26303. Figure 1
and Table 11 provide the minor changes in component values required when using the DS26303 in an
existing IDT82V2048 application.
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