DS3251+ Maxim Integrated Products, DS3251+ Datasheet - Page 14

• Manufacturer Part Number: DS3251+
• Description: IC LIU DS3/E3/STS-1 144-CSBGA
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS3251+

• Number Of Drivers/receivers: 1/1
• Protocol: DS3
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 144-CSBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 6-G. Transmitter Data Select Options
Table 6-H. Receiver PRBS Pattern Select Options
Table 6-I. Hardware Mode Jitter Attenuator Configuration
Note 1:
Note 2:
TDSA
TJA
E3M
0
0
1
1
0
0
0
0
0
1
1
1
1
1
0
1
This coding of the TDSA, TDSB, E3M, and STS bits allows AIS generation to be enabled by
holding TDSA = 0 and changing TDSB from 0 to 1. The type of DS3 AIS signal is selected by the
STS bit with E3M = 0.
If E3M and/or STS are changed when {TDSA,TDSB} ≠ 00, TDSA and TDSB must both be cleared
to 0. After they are cleared, TDSA and TDSB can be configured to transmit a pattern in the new
operating mode.
TDSB
RJA
0
1
0
1
STS
0
1
1
1
1
0
1
1
1
X
0
1
Disabled
Receive path, 16-bit buffer depth
Transmit path, 16-bit buffer depth
Transmit path, 32-bit buffer depth
E3M
MODE
X
X
STS-1
0
1
1
0
1
0
1
DS3
Rx
E3
JITTER ATTENUATOR CONFIGURATION
STS
2
2
X
X
0
0
1
1
X
0
1
23
15
RECEIVER PRBS PATTERN
- 1 PRBS pattern per ITU O.151
- 1 PRBS pattern per ITU O.151
MODE
STS-1
STS-1
DS3
DS3
DS3
Any
Any
Tx
E3
E3
SELECTED
Normal data as input at TPOS and TNEG
Unframed all ones
DS3 AIS per ANSI T1.107
Unframed 100100… pattern
2
2
23
15
14 of 71
- 1 PRBS pattern per ITU O.151
- 1 PRBS pattern per ITU O.151
TRANSMIT DATA SELECTED
(Figure
9-2)