PM4314 Datasheet, PDF (1/2 Pages) PMC-Sierra, Inc – QUAD T1/E1 LINE INTERFACE DEVICE

PMC-Sierra,Inc.
Quad T1/E1 Line Interface Unit
PM4314
QDSX
FEATURES
• Monolithic single-chip device that
integrates four full-featured T1/E1
duplex DSX-1 compatible line interface
circuits in a single device.
• Supports B8ZS, HDB3, and AMI line
codes.
• Provides receive clock recovery and
line performance monitoring.
• Provides transmit jitter attenuation with
programmable line build-out.
• Directly interfaces to the
PM4344 TQUAD Quad T1 Framer,
PM6344 EQUAD Quad E1 Framer,
PM4388 TOCTL Octal T1 Framer,
PM6388 EOCTL Octal E1 Framer,
PM8313 D3MX M13 Multiplexer, and
PM7344 S/UNI-MPH™ Quad T1/E1
Multi-PHY SATURN™ ATM User
Network Interface.
• Software-compatible with the
PM4341A T1XC Single T1
Transceiver, PM6341 E1XC Single E1
Transceiver, and PM4351 COMET
Single T1/E1 Transceiver.
• Provides an 8-bit microprocessor bus
interface for configuration, control, and
status monitoring.
• Low power 5 V CMOS technology.
• Available in a rectangular 128-pin
14 by 20 mm Plastic Quad Flat Pack
(PQFP) package.
and accumulates up to 8191 LCVs for
performance monitoring purposes.
• Detects both programmable in-band
loopback activate and deactivate code
sequences received in the DS1/E1
data stream.
TRANSMIT SECTION
• Optionally accepts dual-rail digital
PCM inputs. Accepts gapped data
streams to support higher rate
demultiplexing. Supports unframed
mode.
• Optionally performs B8ZS or HDB3
encoding for single-rail PCM signals.
• Generates DSX-1 compatible pulses
with programmable pulse shape using
only an external 1:1.36 turns ratio
transformer.
• Accommodates standard cable types
such as ABAM, PIC, and Coax.
• Selectable line length and line type for
DS1 transmit pulse build-out.
• Detects violations of the ANSI T1.403
12.5% pulse density rule over a
moving 192 bit window.
• Allows insertion of framed or unframed
in-band loopback code sequences.
• Supports transmission of the AIS.
• Provides a 48-bit FIFO for jitter
attenuation in each transmit path. FIFO
full or empty indications allow for bit-
stuffing in higher rate multiplexing
applications.
• Provides up to 55 dB of jitter
attenuation as per AT&T TR 62411.
APPLICATIONS
• T1 Channel Service Units (CSU)
• T1/E1 Multiplexers and Digital Private
Branch Exchanges (PBX)
• Digital Access and Cross-Connect
Systems (DACS) and Electronic DSX
Cross-Connect Systems (EDSX)
• T1/E1 Frame Relay Interfaces
• T1/E1 ATM Interfaces
• T1/E1 ATM Circuit Emulation Interfaces
• SONET Add/Drop Multiplexers (ADM)
• T1/E1 Test and Performance
Monitoring Equipment
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• -40 to +85° industrial temperature
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RECEIVE SECTION
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• Provides dual- or single-rail digital
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• Supports reception of G.703 signals
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• Provides Loss Of Signal (LOS) and
Alarm Indication Signal (AIS) alarm
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monitoring applications.
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• Accommodates up to 0.4 UI peak-to-
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• Detects Line Code Violations (LCVs),
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PMC-941034 (R6)
©Ã1998 PMC-Sierra, Inc. October, 1998