CS61583 Datasheet, PDF (5/44 Pages) Cirrus Logic – DUAL T1/E1 LINE INTERFACE

CS61583
ANALOG SPECIFICATIONS (TA = -40 to 85 °C; power supply pins within ±5% of nominal)
Parameter
Min
Typ
Max Units
Transmitter
AMI Output Pulse Amplitudes
E1, 75Ω
E1, 120Ω
T1, DSX-1
(Note 16)
(Note 17) 2.14
2.37
2.6
V
(Note 18) 2.7
3.0
3.3
V
(Note 19) 2.4
3.0
3.6
V
Recommended Transmitter Output Load
T1
E1, 75Ω
E1, 120Ω
Jitter Added During
Remote Loopback
10 Hz - 8 kHz
8 kHz - 40 kHz
10 Hz - 40 kHz
Broad Band
(Note 16)
-
76.6
-
Ω
-
57.4
-
Ω
-
90.6
-
Ω
-
0.005
-
UI
-
0.008
-
UI
-
0.010
-
UI
(Note 20)
-
0.015
-
UI
Power in 2 kHz band about 772 kHz
(Notes 14 and 21)
(DSX-1 only)
12.6
15
17.9 dBm
Power in 2 kHz band about 1.544 MHz
(Notes 14 and 21))
(referenced to power in 2 kHz band at 772 kHz)
(DSX-1 only)
-29
-38
-
dB
Positive to Negative Pulse Imbalance
(Notes 14 and 21)
T1, DSX-1
-
E1, amplitude at center of pulse interval -5
E1, width at 50% of nominal amplitude
-5
0.2
0.5
dB
-
+5
%
-
+5
%
Transmitter Return Loss
(Notes 14, 21, and 22)
51 kHz - 102 kHz
18
25
102 kHz - 2.048 MHz
14
18
2.048 MHz - 3.072 MHz
10
12
-
dB
-
dB
-
dB
E1 Short Circuit Current
E1 and DSX-1 Output Pulse Rise/Fall Times
(Note 23)
-
(Note 24)
-
-
50
mArms
25
-
ns
E1 Pulse Width (at 50% of peak amplitude)
-
244
-
ns
E1 Pulse Amplitude
for a space
E1, 75Ω
E1, 120Ω
-0.237
-
0.237
V
-0.3
-
0.3
V
Notes: 16. Using a transformer that meets the specifications in the Applications section.
17. Measured across 75 Ω at the output of the transmit transformer for CON2/1/0 = 0/0/0.
18. Measured across 120 Ω at the output of the transmit transformer for CON2/1/0 = 0/0/1.
19. Measured at the DSX-1 cross-connect for line length settings CON2/1/0 = 0/1/0, 0/1/1,
1/0/0, 1/0/1, and 1/1/0 after the appropriate length of #22 ABAM cable specified in Table 1.
20. Input signal to RTIP/RRING is jitter free. Values will reduce slightly if jitter free clock is input to TCLK.
21. Typical performance using the line interface circuitry recommended in the Applications section.
22. Return loss = 20 log 10 ABS((z1+z0)/(z1-z0)) where z1=impedance of the transmitter or receiver, and
z0=cable impedance.
23. Transformer secondary shorted with 0.5 Ω resistor during the transmission of 100% ones.
24. At transformer secondary and measured from 10% to 90% of amplitude.
DS172PP5
5