参数资料
型号: PEF3452
厂商: INFINEON TECHNOLOGIES AG
英文描述: Line Interface Unit for DS3, STS 1 and E3
中文描述: 线路接口单元的DS3中,STS 1和E3
文件页数: 19/71页
文件大小: 1372K
代理商: PEF3452
PEF 3452
TE3-LIU V1.3
Pin Descriptions
Preliminary Data Sheet
9
2001-12-05
PRELIMINARY
Transmit Direction
O (analog)
1
XL1
Transmit Line 1
(transmit bipolar ring)
Analog output to the external transformer.
XL1 can be switched into inactive mode.
Transmit Line 2
(transmit bipolar tip)
Analog output to the external transformer.
XL2 can be switched into inactive mode.
Transmit Data In/Positive
Transmit data received from the framer
interface to be output on XL1/2. NRZ or
dual rail positive data has to be provided at
XDIP. Latching of data is done with the
rising or falling transitions of XCLK,
depending on XPE.
Transmit Data In/Negative
If dual rail format is selected, negative data
signal is read from XDIN. If single rail data
format is selected, data on XDINis ignored.
Latching of data is done with the rising or
falling transitions of XCLK, depending on
XPE.
Transmit Clock
Input of the working clock for the
transmitter. The active clock edge is
determined by XPE.
DS3: 44.736 MHz
STS-1: 51.840 MHz
E3: 34.368 MHz
To fulfill e.g. ITU-T G.832 a clock accuracy
of 20 ppm is required. For correct function
a clock signal has always to be supplied to
XCLK.
3
XL2
O (analog)
31
XDIP
I
+
PU
32
XDIN
I
+
PU
30
XCLK
I
+
PU
Table 1
Pin No.
Interface Pin Functions
(cont’d)
Symbol
Input
(
I
)
Output
(
O
)
Supply
(
S
)
Function
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