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DS21Q55, DS21Q55N
Quad T1/E1/J1 Transceiver
Description
The DS21Q55 is a quad software-selectable T1, E1,
or J1 MCM device for short-haul and long-haul
applications. Each port is composed of a line
interface unit (LIU), framer, HDLC controllers, and a
TDM backplane interface, and is controlled by an
8-bit parallel port configured for Intel or Motorola
bus operations. The DS21Q55 is software compatible
with the DS2155 single-chip transceiver. It is pin
compatible with the DS21Qx5y family of products.
Key Features
Applications/Uses
Complete T1/DS1/ISDN-PRI/J1 Transceiver
Functionality
Complete E1 (CEPT) PCM-30/ISDN-PRI
Transceiver Functionality
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
75Ω /100Ω /120Ω 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
Key Specifications:
T/E Carrier & Packetized Products
Part Number
Transmission Standard
Functions
Number of Channels
5V-Tolerant I/O
Supply Voltage (V)
EV-Kit
DS21Q55
T1/E1/J1
4
Yes
3.3
Yes
See All T/E Carrier & Packetized Products (96)
Application Notes
Application Note 319: DS2152, DS2154, DS21x5Y, and DS2155 Interfacing to the MC68360 (QUICC32) - DS21Q55 Application Note 336: Transparent Operation on T1, E1 Framers and Transceivers - DS21Q55, DS21Q55 Application Note 340: DS2153 Programming, ETS 300-011 Remote Alarm Generation - DS21Q55 Application Note 345: DS21352/552, DS2151, DS2152, DS2141A, DS21Q42 Programming SLC-96 - DS21Q55 Application Note 351: T1/E1 and T3/E3 Transformer Selection Guide - DS21Q55 Application Note 374: DS2155 vs. DS21x5y: Software and Hardware Considerations
- DS21Q55 Application Note 382: J1 Japanese Standards - DS21Q55 Application Note 389: DS2155 Internal BERT Programming - DS21Q55 Application Note 390: DS31256 and T1/E1 Interface - DS21Q55 Application Note 391: NRZ Applications - DS21Q55 Application Note 394: HDLC Configuration of Framers and Transceivers - DS21Q55 Application Note 396: Design Migration from DS21Q55 to DS21Q50 or DS21Q59 - DS21Q55 Application Note 397: Pulse Template Measurement - DS21Q55 Application Note 400: DS2155 Monitor Mode Design - DS21Q55 Application Note 401: Extended System Information Bus (ESIB) Control Application - DS21Q55 Application Note 403: DS2155 and DS26401 Software Comparison - DS21Q55 Application Note 405: Power-Fault Protection Layout - DS21Q55 Application Note 406: DS21Qx5y BSDL Scan Chain Mapping - DS21Q55 Application Note 461: Programming and Controlling the FDL on DS2141A, DS2151 - DS21Q55 Application Note 1797: Measuring Telecom Systems Against a Pulse Mask Template - DS21Q55 Application Note 2713: Switching Frame Mode In Live T1 Systems
- DS21Q55 Application Note 2731: DS2155, DS21Q55, DS2156 Programming SLC-96 - DS21Q55, DS21Q55 Application Note 3121: Selecting a T1/E1/J1 Single-Chip Transceiver - DS21Q55 Application Note 3208: Elastic Store Operation - DS21Q55 Application Note 3345: Examples of DS31256 Applications - DS21Q55 Application Note 3349: T1/E1 Loopback Operation for Dallas Semiconductor T1/E1/J1 transceivers - DS21Q55 Application Note 3610: DS21458 Quad and DS26528 Octal Transceiver Software Comparison - DS21Q55 Application Note 3686: DS2155 and DS26521 Software Comparison - DS21Q55
Ordering Information
Notes:
Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales .
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Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions .
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
This product is not available for purchase.
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Document Ref.: xxxx;
2004-04-23
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