CS61577
ANALOG SPECIFICATIONS (TA = -40°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V)
Parameter
Min
Typ
Max
Units
Receiver
RTIP/RRING Input Impedance
-
50k
-
Ω
Sensitivity Below DSX (0dB = 2.4V)
-13.6
500
-
-
-
-
dB
mV
Loss of Signal Threshold
-
0.30
-
V
Data Decision Threshold
T1, DSX-1
(Note 20)
(Note 21)
60
53
45
65
65
50
70
77
55
% of peak
% of peak
% of peak
T1, DSX-1
T1, (FCC Part 68) and E1 (Note 22)
Allowable Consecutive Zeros before LOS
Receiver Input Jitter Tolerance
10kHz - 100kHz
160
175
190
bits
(Note 23)
0.4
6.0
300
-
-
-
-
-
-
UI
UI
UI
2kHz
10Hz and below
Jitter Attenuator
Jitter Attenuation Curve Corner Frequency
Attenuation at 10kHz Jitter Frequency
Attenuator Input Jitter Tolerance (Before Onset
of FIFO Overflow or Underflow Protection)
(Notes 17, 24)
(Notes 17, 24)
-
-
12
6
50
23
-
-
-
Hz
dB
UI
(Notes 17, 24)
Notes: 20. For input amplitude of 1.2 Vpk to 4.14 Vpk.
21. For input amplitude of 0.5 Vpk to 1.2 Vpk and from 4.14 Vpk to RV+.
22. For input amplitude of 1.05 Vpk to 3.3 Vpk.
23. Jitter tolerance increases at lower frequencies. See Figure 11.
24. Attenuation measured with input jitter equal to 3/4 of measured jitter tolerance. Circuit attenuates
jitter at 20 dB/decade above the corner frequency. See Figure 12. Output jitter can increase
significantly when more than 12 UI’s are input to the attenuator. See discussion in the text section.
4
DS155PP2
CIRRUS [ CIRRUS LOGIC ]
