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Электронный компонент: LXT310

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L1









B8ZS/
Unipolar
Decoder
Remote
Loopback
Local
Loopback
Slicers
& Peak Detectors
Gain
LLOOP Enable
LOS/
NLOOP
Clear
XTAL IN
XTAL OUT
JASEL
RPOS
RNEG
RCLK
NLOOP
INT
LOS
LATN
EGL
RTIP
RRING
MCLK
Jitter Attenuator
Inband NLOOP &
LOS Processor
Noise &
Crosstalk
Filter
Timing and
Data
Recovery
Receive Clock
Generator
Equalizer
Control
Receive
Equalizer
Serial Word
Decoder
Enable
Serial
Port
CLKE
SCLK
SDI
SDO
TAOS
Enable
LBO
Select
Encoder
Enable
Transmit
Timing &
Control
B8ZS/
Unipolar
Encoder
Transmit
Atten & Filter
(LBO)
Line Drivers
TCLK
TPOS
TNEG
TTIP
TRING
RLOOP
Enable
CS
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The figure on the front page of this section is a block dia-
gram of the LXT310. The transceiver may be controlled by
a microprocessor through the serial port (Host Mode), or by
individual pin settings (Hardware Mode). The jitter atten-
uator may be positioned in either the transmit or receive
path.
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The LXT310 is a low-power CMOS device. It operates
from a single +5 V power supply which can be connected
externally to both the transmitter and receiver. However,
the two inputs must be within .3 V of each other, and
decoupled to their respective grounds separately. Refer to
Application Information for typical decoupling circuitry.
Isolation between the transmit and receive circuits is pro-
vided internally.
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The twisted-pair input is received via a 1:1 transformer.
Recovered data is output at RPOS/RNEG (RDATA in un-
ipolar mode), and the recovered clock is output at RCLK.
Refer to Test Specifications for receiver timing.
The signal received at RPOS and RNEG is processed
through the receive equalizer. The Equalizer Gain Limit
(EGL) input determines the maximum gain that may be ap-
plied at the equalizer. When set Low, up to 36 dB of gain
may be applied.
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