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CS61577 Datasheet(PDF) 3 Page - Cirrus Logic

Part No. CS61577
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 11)
E1, 75
(Note 12)
E1, 120
(Note 13)
T1, (FCC Part 68)
(Note 14)
T1, DSX-1
(Note 15)
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
Load Presented To Transmitter Output
(Note 11)
-
25
-
Jitter Added During Remote Loopback
(Note 16)
10Hz - 8kHz
8kHz - 40kHz
10Hz - 40kHz
Broad Band
-
-
-
-
0.005
0.008
0.010
0.015
-
-
-
-
UI
UI
UI
UI
Power in 2kHz band about 772kHz
(Notes 11, 17)
12.6
15
17.9
dBm
Power in 2kHz band about 1.544MHz
(Notes 11, 17)
(referenced to power in 2kHz band at 772kHz)
-29
-38
-
dB
Positive to Negative Pulse Imbalance
(Notes 11, 17)
-
0.2
0.5
dB
Transmitter Output Impedance
(Notes 17, 18)
-
-
10
Transmitter Short Circuit Current
(Notes 11, 19)
-
-
50
mA RMS
Notes: 11. Using a 0.47
µF capacitor in series with the primary of a transformer recommended
in the Applications Section.
12. Pulse amplitude measured at the output of the transformer across a 75
Ω load for line length
settings LEN2/1/0 = 0/0/1 and 0/0/0. For LEN2/1/0 = 0/0/0 only, a 4.4
Ω resistor is required
in series with the transformer primary.
13. Pulse amplitude measured at the output of the transformer across a 120
Ω load for line length
setting LEN2/1/0 = 0/0/0.
14. Pulse amplitude measured at the output of the transformer across a 100
Ω load for line length
setting LEN2/1/0 = 0/1/0.
15. Pulse amplitude measured at the DSX-1 Cross-Connect for all line length settings from
LEN2/1/0 = 0/1/1 to LEN2/1/0 = 1/1/1.
16. Input signal to RTIP/RRING is jitter free. Values will reduce slightly if jitter free clock is input to TCLK.
17. Not production tested. Parameters guaranteed by design and characterization.
18. Measured between the TTIP and TRING pins at 772 kHz during marks and spaces.
19. Measured broadband through a 0.5
Ω resistor across the secondary of the transmitter transformer
during the transmission of an all ones data pattern with LEN2/1/0 = 0/0/0 or 0/0/1.
CS61577
DS155PP2
3




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