LXT304A Просмотр технического описания (PDF) - Level One

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LXT304A

Low-Power T1/E1 Short-Haul Transceiver with Receive JA

Level One 

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Figure 5 is a 2.048 Mbps E1 TWP application using 15 Ω

Rt resistors in line with the transmit transformer to provide

high return loss and surge protection. When high return

loss is not a critical factor, a 1:1 or 1:1.26 transformer with-

out in-line resistors provides maximum power savings. The

LXT304A is shown in Hardware Mode with a typical E1/

CRC4 Framer. The hard-wired control lines for TAOS,

LLOOP and RLOOP are individually controllable, and the

LLOOP and RLOOP lines are also tied to a single control

for the Reset function. This configuration is illustrated

with a crystal in place to enable the LXT304A Jitter Atten-

uation Loop, and a single power supply bus.

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