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Receive
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Jitter
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Elastic Store
MODE
TPOS
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MCLK
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Equalizer
Control
Synchronizer
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DPM
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Hardware
Host
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SDI
SDO
CS
SCLK
CLKE
EC1
EC2
EC3
RLOOP
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TAOS
RTIP
RRING
Peak
Detector
Data Slicers
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The LXT304A is a fully integrated low-power transceiver
for both North American 1.544 Mbps (T1), and Interna-
tional 2.048 Mbps (E1) applications. It features a constant
low output impedance transmitter allowing for high trans-
mitter return loss in T1/E1 applications. Transmit pulse
shapes (DSX-1 or E1) are selectable for various line
lengths and cable types.
The LXT304A provides receive jitter attenuation starting
at 3 Hz, and is microprocessor controllable through a serial
interface.
It offers a variety of diagnostic features including transmit
and receive monitoring. The device incorporates an on-
chip crystal oscillator, and also accepts digital clock inputs.
It uses an advanced double-poly, double-metal CMOS pro-
cess and requires only a single 5-volt power supply.
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