参数资料
型号: WJLXT388LEB2
厂商: INTEL CORP
元件分类: 数字传输电路
英文描述: DATACOM, PCM TRANSCEIVER, PQFP100
封装: 14 X 14MM, ROHS COMPLIANT, LQFP-100
文件页数: 4/80页
文件大小: 1017K
代理商: WJLXT388LEB2
Intel
LXT388 — Dual T1/E1/J1 Transceiver
12
Datasheet
20
TPOS0/
TDATA0
DI
Transmit Positive Data.
Transmit Data.
Transmit Negative Data.
Unipolar/Bipolar Select.
Bipolar Mode:
TPOS/TNEG are active high NRZ inputs. TPOS indicates the transmission of a positive
pulse whereas TNEG indicates the transmission of a negative pulse.
.
Unipolar Mode:
When TNEG/UBS is pulled High for more than 16 consecutive TCLK clock cycles,
unipolar I/O is selected. In unipolar mode, B8ZS/HDB3 or AMI encoding/decoding is
determined by the CODEN pin (hardware mode) or by the CODEN bit in the GCR register
(software mode).
TDATA is the data input in unipolar I/O mode.
21
TNEG0/
UBS0
DI
22
RCLK0
DO
Receive Clock.
Normal Mode:
This pin provides the recovered clock from the signal received at RTIP and RRING. Under
LOS conditions there is a transition from RCLK signal (derived from the recovered data)
to MCLK signal at the RCLK output.
Data Recovery Mode:
If MCLK is High, the clock recovery circuit is disabled and RPOS and RNEG are internally
connected to an EXOR that is fed to the RCLK output for external clock recovery
applications.
RCLK will be in high impedance state if the MCLK pin is Low.
Table 2.
Pin Assignments and Signal Descriptions - Digital Interface (Continued)
Pin #
LQFP
Symbol
I/O
1
Description
1. DI: Digital Input; DO: Digital Output; DI/O: Digital Bidirectional Port; AI: Analog Input; AO: Analog Output S: Power Supply;
N.C.: Not Connected.
TPOS
TNEG
Selection
0
Space
1
0
Positive Mark
0
1
Negative Mark
1
Space
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