This data sheet also applies to the LXT312/LXT315 products.
The LXT312A and LXT315A are integrated repeater/transceiver circuits for T1 carrier systems.
The LXT312A is a dual repeater/transceiver and the LXT315A is a single repeater/transceiver.
The LXT312A and LXT315A are designed to operate as regenerative repeaters/transceivers for
1.544 Mbps data rate PCM lines. Each includes all circuits required for a regenerative repeater/
transceiver system including the equalization network, automatic line build-out (ALBO), and a
state-of-the-art analog/digital clock extraction network tuned by an external crystal.
The key feature of the LXT312A family is that it requires only a crystal and a minimum of other
components to complete a repeater/transceiver design. Compared with traditional tuned coil-
type repeaters/transceivers, they offer significant savings in component and labor costs, along
with reduced voltage drop/power consumption, and improved reliability. To ensure performance
for all loop lengths, the LXT312A and LXT315A are 100% AC/DC tested using inputs
generated by Intel’s proprietary transmission line and network simulator.
The LXT312A and LXT315A are advanced CMOS devices which require only a single 5-volt
power supply.
Product Features
s
s
s
s
s
s
Integrated repeater/transceiver circuit on a
single CMOS chip
On-chip equalization network
On-chip ALBO
Low power consumption
No tuning coil
On-chip Loopback
s
s
s
s
s
s
Recovered Clock Output
0 to 36 dB dynamic range
-11 dB interference margin
Compatible with CB113/TA24
specifications
Single 5 V CMOS technology
Available in 16-pin PDIP and 44-pin PLCC
As of January 15, 2001, this document replaces the Level One document
LXT312A/LXT315A — Low Power T1 PCM Repeaters/Transceivers.
Order Number: 249071-001
January 2001
Information in this document is provided in connection with Intel
®
products. No license, express or implied, by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability
whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to
fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not
intended for use in medical, life saving, or life sustaining applications.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Intel reserves these for
future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them.
The LXT312A/LXT315A may contain design defects or errors known as errata which may cause the product to deviate from published specifications.
Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800-
548-4725 or by visiting Intel’s website at http://www.intel.com.
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