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CS61305A-IP1 Datasheet(PDF) 3 Page - Cirrus Logic

Part No. CS61305A-IP1
Description  T1/E1 LINE INTERFACE
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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ANALOG SPECIFICATIONS (TA = -40°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V)
Parameter
Min
Typ
Max
Units
Transmitter
AMI Output Pulse Amplitudes
(Note 10)
E1, 75
(Note 11)
E1, 120
(Note 12)
T1, FCC Part 68
(Note 13)
T1, DSX-1
(Note 14)
2.14
2.7
2.7
2.4
2.37
3.0
3.0
3.0
2.6
3.3
3.3
3.6
V
V
V
V
E1 Zero (space) level (LEN2/1/0 = 000)
1:1 transformer and 75
Ω load
1:1.26 transformer and 120
Ω load
-0.237
-0.3
-
-
0.237
0.3
V
V
Load Presented To Transmitter Output
(Note 10)
-
75
-
Jitter Added by the Transmitter
(Note 15)
10Hz - 8kHz
8kHz - 40kHz
10Hz - 40kHz
Broad Band
-
-
-
-
-
-
-
-
0.01
0.025
0.025
0.05
UI
UI
UI
UI
Power in 2kHz band about 772kHz
(Notes 10, 16)
12.6
15
17.9
dBm
Power in 2kHz band about 1.544MHz
(Notes 10, 16)
(referenced to power in 2kHz band at 772kHz)
-29
-38
-
dB
Positive to Negative Pulse Imbalance
(Notes 10, 16)
T1, DSX-1
E1 amplitude at center of pulse
E1 pulse width at 50% of nominal amplitude
-
-5
-5
0.2
-
-
0.5
5
5
dB
%
%
E1 Transmitter Return Loss
(Notes 10, 16, 17)
51 kHz to 102 kHz
102 kHz to 2.048 MHz
2.048 MHz to 3.072 MHz
20
20
20
28
28
24
-
-
-
dB
dB
dB
E1 Transmitter Short Circuit Current
(Notes 10, 18)
-
-
50
mA RMS
Notes: 10. Using a 0.47
µF capacitor in series with the primary of a transformer recommended
in the Applications Section.
11. Pulse amplitude measured at the output of a 1:1 transformer across a 75
Ω load for
line length setting LEN2/1/0 = 0/0/0.
12. Pulse amplitude measured at the output of a 1:1.26 transformer across a 120
Ω load for line length
setting LEN2/1/0 = 0/0/0 or at the output of a 1:1 transformer across a 120
Ω load for LEN2/1/0 = 001.
13. Pulse amplitude measured at the output of a 1:1.15 transformer across a 100
Ω load for
line length setting LEN2/1/0 = 0/1/0.
14. Pulse amplitude measured at the DSX-1 Cross-Connect across a 100
Ω load for all line length
settings from LEN2/1/0 = 0/1/1 to LEN2/1/0 = 1/1/1 using a 1:1.5 transformer.
15. Input signal to RTIP/RRING is jitter free. Values will reduce slightly if jitter free clock is input to TCLK.
16. Not production tested. Parameters guaranteed by design and characterization.
17. Return loss = 20 log10 ABS((z1 +z0)/(z1-z0)) where z1 = impedance of the transmitter, and
z0 = impedance of line load. Measured with a repeating 1010 data pattern with LEN2/1/0 = 0/0/0
and a 1:2 transformer with two 9.4
Ω series resistors terminated by a 75Ω load,
or for LEN2/1/0 = 0/0/1 with a 1:2 transformer and two 15
Ω series resistors terminated by a
120
Ω load.
18. Measured broadband through a 0.5
Ω resistor across the secondary of the transmitter transformer
during the transmission of an all ones data pattern for LEN2/1/0 = 0/0/0 or 0/0/1with a 1:2 transformer
and the series resistors specified in Table A1.
CS61305A
DS157PP3
3




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