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CS61581 Datasheet(PDF) 5 Page - Cirrus Logic

Part No. CS61581
Description  T1/E1 Universal Line Interface
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CS61581
DS211PP8
5
ANALOG SPECIFICATIONS (TA = -40°C to 85°C; TV+, RV+ = 5.0 V ±5%; GND = 0 V)
Notes: 7. Using a 0.47 µF capacitor in series with the primary of a transformer recommended in the Applications
Section.
8. Pulse amplitude measured at the output of the transformer across a 75
. load for line length settings
LEN[2:0] = 001 and 000.
9. Pulse amplitude measured at the output of the transformer across a 120
. load for line length setting
LEN[2:0] = 000.
10. Pulse amplitude measured at the output of the transformer across a 100
. load for line length setting
LEN[2:0] = 000.
11. Pulse amplitude measured at the DSX-1 Cross-Connect for all line length settings from LEN[2:0] = 011
to LEN[2:0] = 111.
12. Assuming that jitter free clock is input to TCLK. Jitter Attenuator not in path.
13. Not production tested. Parameters guaranteed by design and characterization.
14. Measured broadband through a 0.5
. resistor across the secondary of the transmitter transformer
during the transmission of an all ones data pattern with LEN[2:0] = 000 or 001.
Parameter
Min
Typ
Max
Units
Transmitter
AMI Output Pulse Amplitudes
(Note 7)
E1, 75
. (Note 8)
E1, 120
. (Note 9)
T1, (FCC Part 68) (Note 10)
T1, DSX-1 (Note 11)
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
External Equalizer Pulse Amplitude
4.8
5.6
6.4
V
Transmitter Output Impedance
(Note 13)
Transformer turns ratio = 1:2
Low Z, Long Haul
1.5
.
Transformer turns ratio = 1:1.5
E1, 75
.
E1, 120
.
T1, FCC
T1, DSX1
T1, Ext. Equal
33
53
44
44
44
.
.
.
.
.
Jitter Added by the Transmitter
(Note 12, 13)
10 Hz - 8 kHz
8k Hz - 40 kHz
10 Hz - 40 kHz
Broad Band
-
-
-
-
0.015
0.015
0.015
0.020
-
-
-
-
UI
UI
UI
UI
Power in 2 kHz band about 772 kHz
(Notes 7, 18)
12.6
15
17.9
dBm
Power in 2 kHz band about 1.544 MHz
(Notes 7, 18)
(referenced to power in 2 kHz band at 772 kHz)
-29
-38
-
dB
Positive to Negative Pulse Imbalance
(Notes 7, 13)
-
0.2
0.5
dB
Transmitter Short Circuit Current
(Notes 7, 14)
-
-
50
mA RMS




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