PEF 22508 E V1.1-G Infineon Technologies, PEF 22508 E V1.1-G Datasheet - Page 75

• Manufacturer Part Number: PEF 22508 E V1.1-G
• Description: IC INTERFACE E1/T1/J1 LBGA-256
• Manufacturer: Infineon Technologies
• Series: OctalLIU™r

Specifications of PEF 22508 E V1.1-G

• Function: Line Interface Unit (LIU)
• Interface: E1, J1, T1
• Number Of Circuits: 8
• Voltage - Supply: 1.8V, 3.3V
• Current - Supply: 370mA
• Power (watts): 140mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 256-LSBGA
• Includes: Automatic Protection Switching, Clock Generation, Power-Down, Transmit Line Monitor, Tristate Function
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: PEF22508EV1.1T; PEF22508EV11GXP; SP000029953

•
•
To reduce the crosstalk on the received signals in long haul applications the OctalLIU
a transmit attenuator (Line Build-Out, LBO) in the data path. This is used only in T1 mode. LBO attenuation is
selectable with the values 0, -7.5, -15 or -22.5 dB (register bits LIM2.LBO(2:1)). ANSI T1. 403 defines only 0 to -
15 dB.
Figure 32
Figure 33
3.9.6.1
After reset XPM2.XPDIS is zero so that programming with XPM(2:0) is selected. The default setting after reset for
the registers XMP(2:0) generates the E1 pulse shape, see
value for T1 mode exists. So after switching into T1 mode, an explicit new programming like described in
is necessary.
If LBO attenuation is selected, the programming of XPM(2:0) will be ignored. Instead the pulse shape
programming is handled internally: The generated pulse shape before LBO filtering is the same as for T1 0 to 40 m.
The given values are optimized for transformer ratio: 1 : 2.4 and cable type AWG24 using transmitter
configurations listed in
= 120
Table 24
LBO
(dB)
0
0
0
Data Sheet
By the registers XMP(2:0) compatible to the QuadLIU
XPM2.XPDIS is cleared, see
Or by the registers TXP(16:1), see TXP1, if the register bit XPM2.XPDIS is set, see
For more details see chapter “Operational Description”
and
Measurement Configuration for E1 Transmit Pulse Template
Measurement Configuration for T1/J1 Transmit Pulse Template
QuadLIU
Recommended Pulse Shaper Programming for T1/J1 with Registers XPM(2:0) (Compatible to
QuadLIU )
Figure 33
Range
(m)
0 to 40
40 to 81
81 to 122
OctalLIU
OctalLIU
Table 23
with R
TM
Compatible Programming
TM
TM
load
XL3
XL1
XL2
XL4
XL3
XL1
XL2
XL4
and shown in
XPM2
= 100
Range
(ft)
0 to 133
133 to 266
266 to 399
see chapter 3.6.1.
are used.
see chapter 3.6.1.
R
R
SER
SER
Figure
30. The measurement configurations of
75
XPM0
Hexadecimal
D7
FA
3D
Table
TM
, see
(0 to 655 ft)
Cable, Z
0 to 200 m
25, but with an unreduced amplitude. No reset
Table 24
R
OctalLIU_pulse_meas_temp_T1
OctalLIU_pulse_meas_temp_E1
load
0
XPM1
22
26
37
U
PULSE
and
R
load
Table
TM
Functional Description
offers the ability to place
Table 26
U
25, if the register bit
PULSE
Rev. 1.0, 2005-06-02
Figure 32
XPM2
11
11
11
PEF 22508 E
and
OctalLIU
Table
Table 24
with R
27.
load
TM