XRT75L04 Datasheet, PDF (12/57 Pages) Exar Corporation – FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER

XRT75L04
FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
REV. 1.0.4
CONTROL AND ALARM INTERFACE
PIN #
SIGNAL NAME
TYPE
DESCRIPTION
36
MRING_0
24
MRING_1
9
MRING_2
21
MRING_3
I Monitor Ring Input - Channel 0:
Monitor Ring Input - Channel 1:
Monitor Ring Input - Channel 2:
Monitor Ring Input - Channel 3:
The bipolar line output signal from TRING_n is connected to this pin via a 270 Ω
resistor to check for line driver failure.
NOTE: This pin is internally pulled "Low".
37
MTIP_0
25
MTIP_1
8
MTIP_2
20
MTIP_3
I Monitor Tip Input - Channel 0:
Monitor Tip Input - Channel 1:
Monitor Tip Input - Channel 2:
Monitor Tip Input - Channel 3:
The bipolar line output signal from TTIP_n is connected to this pin via a 270-
ohm resistor to check for line driver failure.
NOTE: This pin is internally pulled "Low".
42
DMO_0
30
DMO_1
3
DMO_2
15
DMO_3
O Drive Monitor Output - Channel 0:
Drive Monitor Output - Channel 1:
Drive Monitor Output - Channel 2:
Drive Monitor Output - Channel 3:
If MTIP_n and MRING_n has no transition pulse for 128 ± 32 TxCLK_n cycles,
DMO_n goes “High” to indicate the driver failure. DMO_n output stays “High”
until the next AMI signal is detected.
83
RLOS_0
76
RLOS_1
138
RLOS_2
145
RLOS_3
O Receive Loss of Signal Output Indicator - Channel 0:
Receive Loss of Signal Output Indicator - Channel 1:
Receive Loss of Signal Output Indicator - Channel 2:
Receive Loss of Signal Output Indicator - Channel 3:
This output pin toggles "High" if the receiver has detected a Loss of Signal Con-
dition.
The criteria for declaring /clearing an LOS Condition depends upon whether it is
operating in the E3 or STS-1/DS3 Mode.
82
RLOL_0
75
RLOL_1
139
RLOL_2
146
RLOL_3
O Receive Loss of Lock Output Indicator - Channel 0:
Receive Loss of Lock Output Indicator - Channel 1:
Receive Loss of Lock Output Indicator - Channel 2:
Receive Loss of Lock Output Indicator - Channel 3:
This output pin toggles "High" if a Loss of Lock Condition is detected. LOL
(Loss of Lock) condition occurs if the recovered clock frequency deviates from
the Reference Clock frequency (available at either E3CLK or DS3CLK or STS-
1CLK input pins) by more than 0.5%.
111
RXA
**** External Resistor of 3 K Ω ± 1%.
Should be connected between RxA and RxB for internal bias.
110
RXB
**** External Resistor of 3K Ω ±1%.
Should be connected between RxA and RxB for internal bias.
10