參數(shù)資料
型號: XRT59L921
廠商: Exar Corporation
英文描述: TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
中文描述: 二十一條路E1線路接口單元
文件頁數(shù): 14/32頁
文件大?。?/td> 377K
代理商: XRT59L921
XRT59L921
12
TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
REV. 1.2.1
RECEIVER ELECTRICAL CHARACTERISTICS
T
A
=-40 to 85°C, V
DD
=3.3V±5%, unless otherwise specified.
Parameter
M
IN
T
YP
M
AX
U
NIT
T
EST
C
ONDITIONS
Receiver Loss of Signal:
Threshold to Assert
-
20
-
dB
Cable attenuation @ 1024KHz
Threshold to Clear
-
15
-
dB
Time Delay
10
-
255
bit
Per ITU-G.775
Hysteresis
-
5
-
dB
Receiver Sensitivity
9
11
-
dB
Below nominal pulse amplitude of 3.0V for
120
and 2.37V for 75
applications.
Interference Margin
-18
-14
-
dB
With 6dB cable loss.
Input Impedance
5
-
-
K
Jitter Tolerance:
20Hz
10
UIpp
700Hz
5
-
-
UIpp
10KHz —100KHz
0.3
UIpp
Return Loss:
51KHz —102KHz
14
-
-
dB
Per ITU-G.703
102KHz—2048KHz
20
-
-
dB
2048KHz—3072KHz
16
-
-
dB
TRANSMITTER ELECTRICAL CHARACTERISTICS
TA=-40 to 85°C, VDD=3.3V±5%, unless otherwise specified
Parameter
M
IN
T
YP
M
AX
U
NIT
T
EST
C
ONDITIONS
AMI Output Pulse Amplitude:
75
Application
2.13
2.37
2.60
V
Use transformer with 1:2 ratio
and 9.1
resistor in series with
each end of primary
120
Application
2.70
3.0
3.30
V
Output Pulse Width
224
244
264
ns
Output Pulse Width Ratio
0.95
1.05
Per
ITU-G.703
Output Pulse Amplitude Ratio
0.95
1.05
Per
ITU-G.703
Output Return Loss:
51KHz —102KHz
8
-
-
dB
Per
ETSI 300 166 and G.703
102KHz—2048KHz
8
-
-
dB
2048KHz—3072KHz
8
-
-
dB
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