82P2281PFG IDT, Integrated Device Technology Inc, 82P2281PFG Datasheet - Page 90

• Manufacturer Part Number: 82P2281PFG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2281PFG

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

3.24
three ways of manipulating the waveform shaper can be selected before
the data is transmitted:
3.24.1
3.24.1.1
which meets T1.102 and G.703, and it is measured in the far end as
shown in Figure 33.
plates are provided corresponding to five grades of cable length. The
selection is made by the PULS[3:0] bits. In J1 applications, the
PULS[3:0] bits should be set to ‘0010’. The details are listed in Table 60.
IDT82P2281
Figure 33. T1/J1 Pulse Template Measurement Circuit
Note: R
IDT82P2281
-0.2
-0.4
-0.6
1.2
0.8
0.6
0.4
0.2
According to the various cables, configured by the PULS[3:0] bits,
1. Preset Waveform Template;
2. Line Build Out (LBO) Filter (T1 only);
3. User-Programmable Arbitrary Waveform.
In T1/J1 applications, the waveform template is shown in Figure 32,
In T1 applications, to meet the template, five preset waveform tem-
1
0
0
LOAD
WAVEFORM SHAPER / LINE BUILD OUT
Figure 32. DSX-1 Waveform Template
PRESET WAVEFORM TEMPLATE
= 100 Ω + 5%
T1/J1 Mode
TRING
TTIP
250
500
Time (ns)
750
Cable
1000
R
LOAD
1250
V
OUT
90
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
3.24.1.2
which meets G.703, and it is measured on the near line side as shown in
Figure 35.
Table 60: PULS[3:0] Setting In T1/J1 Mode
Figure 35. E1 Pulse Template Measurement Circuit
Note: R
In E1 applications, the waveform template is shown in Figure 34,
-0.20
0.80
0.00
1.00
0.60
0.40
0.20
1.20
IDT82P2281
Cable Configuration
-0.6
LOAD
T1 - 133 ~ 266 ft
T1 - 266 ~ 399 ft
T1 - 399 ~ 533 ft
T1 - 533 ~ 655 ft
T1 - 0 ~ 133 ft
E1 Mode
Figure 34. E1 Waveform Template
J1 - 0 ~ 655 ft
= 75 Ω or 120 Ω (+ 5%)
-0.4
TRING
TTIP
-0.2
Time In Unit Intervals
0
0.2
PULS[3:0]
R
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 0 1 0
August 20, 2009
LOAD
0.4
V
OUT
0.6