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DS2156 Datasheet

  • DS2156

  • T1/E1/J1 Single-Chip Transceiver TDM/UTOPIA II Interface

  • 1468.90KB

  • 262頁(yè)

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DS2156
T1/E1/J1 Single-Chip Transceiver
TDM/UTOPIA II Interface
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2156 is a software-selectable T1, E1, or J1
single-chip transceiver (SCT) for short-haul and
long-haul applications. The backplane is user-
configurable for a TDM or UTOPIA II bus interface.
The DS2156 is composed of a line interface unit
(LIU), framer, HDLC controllers, and a
UTOPIA/TDM backplane interface, and is controlled
by an 8-bit parallel port configured for Intel or
Motorola bus operations. The DS2156 is pin and
software compatible with the DS2155.
The LIU is composed of transmit and receive
interfaces and a jitter attenuator. The transmit
interface is responsible for generating the necessary
waveshapes for driving the network and providing
the correct source impedance depending on the type
of media used. T1 waveform generation includes
DSX-1 line buildouts as well as CSU line buildouts
of -7.5dB, -15dB, and -22.5dB. E1 waveform
generation includes G.703 waveshapes for both 75鈩?/div>
coax and 120鈩?twisted cables. The receive interface
provides network termination and recovers clock and
data from the network.
FEATURES
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Complete T1/DS1/ISDN-PRI/J1 Transceiver
Functionality
Complete E1 (CEPT) PCM-30/ISDN-PRI
Transceiver Functionality
User-Selectable TDM or UTOPIA II Bus
Interface
Long-Haul and Short-Haul Line Interface for
Clock/Data Recovery and Waveshaping
CMI Coder/Decoder for Optical I/F
Crystal-Less Jitter Attenuator
Fully Independent Transmit and Receive
Functionality
Dual HDLC Controllers
Programmable BERT Generator and Detector
Internal Software-Selectable Receive and
Transmit-Side Termination Resistors for
75鈩?100鈩?120鈩?T1 and E1 Interfaces
Dual Two-Frame Elastic-Store Slip Buffers that
Connect to Asynchronous Backplanes Up to
16.384MHz
16.384MHz, 8.192MHz, 4.096MHz, or
2.048MHz Clock Output Synthesized to
Recovered Network Clock
APPLICATIONS
Inverse Mux ATM (IMA)
T1/E1/J1 Line Cards
Switches and Routers
Add-Drop Multiplexers
Features continued on page 8.
ORDERING INFORMATION
PART
DS2156L
DS2156LN
TEMP RANGE
0擄C to +70擄C
-40擄C to +85擄C
PIN-PACKAGE
100 LQFP
100 LQFP
UTOPIA
T1/E1/J1
NETWORK
DS2156
T1/E1/J1
TDM/UTOPIA
BACKPLANE
TDM
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:www.maxim-ic.com/errata.
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