CS61535A Cirrus Logic, Inc., CS61535A Datasheet - Page 5

• Manufacturer Part Number: CS61535A
• Description: T1-E1 Line Interface Unit for PCM applications
• Manufacturer: Cirrus Logic, Inc.

ANALOG SPECIFICATIONS
Notes: 24. For input amplitude of 1.2 V
DS40F2
Driver Performance Monitor
MTIP/MRING Sensitivity:
Differential Voltage Required for Detection
Receiver
RTIP/RRING Input Impedance
Sensitivity Below DSX (0dB = 2.4V)
Data Decision Threshold
Data Decision Threshold
Allowable Consecutive Zeros before LOS
Receiver Input Jitter Tolerance
Loss of Signal Threshold
25. For input amplitude of 0.5 V
26. For input amplitude of 1.05 V
27. Jitter tolerance increases at lower frequencies. See Figure 11.
28. LOS goes high after 160 to 190 consecutive zeros are received. A zero is output on RPOS and
RNEG (or RDATA) for each bit period where the input signal amplitude remains below the data
decision threshold. The analog input squelch circuit operates when the input signal amplitude above
ground on the RTIP and RRING pins falls within the squelch range long enough for the internal
slicing threshold to decay within this range. Operation of the squelch causes zeros to be output on
RPOS and RNEG as long as the input amplitude remains below 0.25V. During receive LOS, pulses
greater than 0.25V in amplitude may be output on RPOS and RNEG. LOS returns low after the ones
density reaches 12.5% (based upon 175 bit periods starting with a one and containing
less than 100 consecutive zeros) as prescribed in ANSI T1.231-1993.
T1, DSX-1
T1, DSX-1
T1, FCC Part 68 and E1
10kHz - 100kHz
2kHz
10Hz and below
Parameter
pk
pk
pk
(TA = -40 C to 85 C; TV+, RV+ = 5.0V 5%; GND = 0V)
to 4.14 V
to 1.2 V
to 3.3 V
pk
pk
pk
(Note 24)
(Note 25)
(Note 26)
(Note 27)
(Note 28)
and from 4.14 V
.
.
E1
T1
-13.6
0.25
Min
160
300
0.4
6.0
60
53
45
-
-
-
-
pk
to RV+.
0.60
0.30
Typ
175
50k
65
65
50
65
50
-
-
-
-
Max
0.50
190
70
77
55
-
-
-
-
-
-
-
-
CS61535A
% of peak
% of peak
% of peak
% of peak
% of peak
Units
bits
dB
UI
UI
UI
V
V
5