IDT82P2821BHG IDT, Integrated Device Technology Inc, IDT82P2821BHG Datasheet - Page 97

• Manufacturer Part Number: IDT82P2821BHG
• Description: IC LINE INTERFACE UNIT 640-PBGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT82P2821BHG

• Function: Line Interface Unit (LIU)
• Interface: E1, J1, T1
• Number Of Circuits: 1
• Voltage - Supply: 1.8V, 3.3V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: *
• Includes: Defect and Alarm Detection, Driver Over-Current Detection and Protection, LLOS Detection, PRBSARB / IB Detection and Generation
• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Power (watts): -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 800-1703; 82P2821BHG

LOS - LOS Configuration Register
Address: 00DH, 04DH, 08DH, 0CDH, 10DH, 14DH, 18DH, 1CDH, (CH1~CH8)
Type: Read / Write
Default Value: 15H
Programming Information
IDT82P2821
6 - 4
3 - 2
Bit
7
20DH, 24DH, 28DH, 2CDH, 30DH, 34DH, 38DH, 3CDH, (CH9~CH16)
40DH, 44DH, 48DH, 4CDH, 50DH, (CH17~CH21)
7CDH (CH0)
LAC
7
TALOS[1:0]
ALOS[2:0]
Name
LAC
ALOS2
6
This bit selects the LLOS, SLOS and AIS criteria.
0: T1.231 (in T1/J1 mode) / G.775 (in E1 mode). (default)
1: I.431 (in T1/J1 mode) / ETSI 300233 & I.431 (in E1 mode).
These bits select the amplitude threshold (Q). When the amplitude of the data is less than Q Vpp for N consecutive pulse inter-
vals, LLOS is declared. The consecutive pulse intervals (N) are determined by the LAC bit (b7, LOS,...).
The ALOS[2:0] settings for Normal Receive mode and Line Monitor mode are different. Refer to below tables.
These bits select the amplitude threshold. When the amplitude of the data is less than the threshold for a certain period, TLOS is
declared. The period is determined by the TDLOS bits (b1~0, LOS,...). When the amplitude of a pulse is above the threshold,
TLOS is cleared.
For Differential line interface:
00: 1.2 Vp.
01: 0.9 Vp. (default)
10: 0.6 Vp.
11: 0.4 Vp.
For Single Ended line interface:
00: 0.61 Vp.
01: 0.48 Vp. (default)
10: 0.32 Vp.
11: 0.24 Vp.
ALOS1
5
ALOS[2:0] Setting in Normal Receive Mode
ALOS[2:0] Setting in Line Monitor Mode
001 (default)
001 (default)
ALOS[2:0]
ALOS[2:0]
000
010
011
100
101
110
000
010
011
1xx
111
ALOS0
4
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
97
Q (Vpp)
Q (Vpp)
0.5
0.7
0.9
1.2
1.4
1.6
1.8
2.0
1.0
1.4
1.8
2.2
TALOS1
3
Description
vs. 6.0 Vpp (dB)
vs. 6.0 Vpp (dB)
reserved.
TALOS0
21.58
18.66
16.48
13.98
12.64
11.48
10.46
15.56
12.64
10.46
9.54
8.71
2
vs. 4.74 Vpp (dB)
vs. 4.74 Vpp (dB)
TDLOS1
19.54
16.61
14.43
11.93
10.59
13.52
10.59
9.43
8.41
7.49
8.41
6.67
1
February 6, 2009
TDLOS0
0