DS26502LN+ Maxim Integrated Products, DS26502LN+ Datasheet - Page 77
![IC T1/E1/J1 64KCC ELEMENT 64LQFP](/photos/6/50/65017/64-lqfp_21-0083_sml.jpg)
DS26502LN+
Manufacturer Part Number
DS26502LN+
Description
IC T1/E1/J1 64KCC ELEMENT 64LQFP
Manufacturer
Maxim Integrated Products
Type
BITS Elementr
Datasheet
1.DS26502LN.pdf
(125 pages)
Specifications of DS26502LN+
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Frequency-max
-
Output
-
Input
-
- Current page: 77 of 125
- Download datasheet (4Mb)
13. LINE INTERFACE UNIT (LIU)
The LIU in the DS26502 contains three sections: the receiver, which handles clock and data recovery; the
transmitter, which generates waveshapes and drives the network line; and the jitter attenuator. These three
sections are controlled by the line interface control registers (LIC1–LIC4), which are described below.
The DS26502 can switch among T1, J1, E1, and 6312kHz without changing any external circuits. A
different transformer is used for 64KCC networks. For a list of recommended transformer part numbers,
contact technical support at www.maxim-ic.com/support.
minimal components. In this configuration the DS26502, using a fixed 120Ω external termination, can
connect to T1, J1, E1, 64KCC, or 6312kHz. The receiver can adjust the 120Ω termination to 100Ω, 110Ω
or 75Ω. The transmitter can adjust its output impedance to provide high return loss characteristics for
75Ω, 100Ω, 110Ω, and 120Ω lines. Other components may be added to this configuration to meet safety
and network protection requirements. This is covered in the Recommended Circuits section (Section
13.8).
Figure 13-1. Basic Network Connection
TRANSMIT
LINE
RECEIVE
LINE
2:1
1:1
60
10μF
77 of 125
0.01μF
60
TTIP
TRING
RTIP
RRING
Figure 13-1
DS26502
shows a network connection using
CONNECTIONS
BACKPLANE
DS26502
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