DS21Q55

Quad T1/E1/J1 Transceiver

Data Sheet (Rev. 1)
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Part Details

  • 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
DS21Q55
Quad T1/E1/J1 Transceiver
DS21Q55, DS21Q55N: Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Application Note 5

Design Note 14

Technical Articles 7

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Hardware Ecosystem

Parts Product Life Cycle Description
Product 6
DS2155
T1/E1/J1 Single-Chip Transceiver
DS21Q50
LAST TIME BUY Quad E1 Transceiver
DS21Q552
Quad T1/E1 Transceiver (3.3V, 5.0V)
DS21Q554
Quad T1/E1 Transceiver (3.3V, 5.0V)
DS21Q352
Quad T1/E1 Transceiver (3.3V, 5.0V)
DS21Q354
Quad T1/E1 Transceiver (3.3V, 5.0V)
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Tools & Simulations

BSDL Model File 1

Evaluation Kits

DK101

Low-Cost Demo Kit Motherboard

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Features and Benefits

  • Connects PC-Based Demo Software to the Telecom IC(s) Under Evaluation
  • Provides Point-and-Click Access to All Telecom IC Registers and Features
  • 128kB of Flash Memory, 264kB of SRAM
  • Demo Software User Interface can be Customized with Simple Text Edits
  • Allows Download and Execution of Custom Firmware for Advanced Applications
  • Supports 3.3V and 5V Telecom ICs
  • On-Board Oscillators: 3.088MHz (2 x DS1), 16.384MHz (8 x E1), and 44.736MHz (DS3)
  • Four General-Purpose Switches Available for Use with Custom Firmware
  • Motorola ONCE/BDM Connector for Code Development and Debug

Product Details

The DK101 is a general-purpose demo kit platform for evaluating Dallas Semiconductor Telecom ICs. The ICs are mounted on daughter cards specifically designed to plug into the DK101's connector. The DK101 provides a microprocessor, flash- and SRAM-based program memory, various oscillators and support logic, and an RS-232 interface to a host PC. As shipped from the factory, the processor runs general-purpose firmware that executes reads and writes to the daughter card on behalf of PC-based demo software. Custom firmware can be downloaded and executed by the processor for advanced applications.

DK2000

High-Performance Demo Kit Motherboard

Buy Now View Details

Features and Benefits

  • Interfaces with Up to Four Daughter Cards Simultaneously
  • Connects PC-Based Demo Software to the Telecom ICs Under Evaluation
  • Provides Point-and-Click Access to All Telecom IC Registers and Features
  • Demo Software User Interface can be Customized with Simple Text Edits
  • Supports Development of Telecom Firmware Before Target Board Design is Complete
  • 64MB of DRAM, 4MB of Flash Memory
  • Supports 5V, 3.3V, and 2.5V Telecom ICs
  • Hardware Support for Daughter Card-to-Daughter Card and Daughter Card-to-Processor TDM Data Streams
  • Hardware Support for UTOPIA II Interface
  • Side TIM Connector Provides Access to the PowerPC 60x Bus for High-Performance Applications
  • Provides Several Connectors for In-System Programming of Board Components

Product Details

The DK2000 is a powerful, flexible platform for evaluating Dallas Semiconductor Telecom ICs and developing related firmware. The ICs are mounted on daughter cards specifically designed to plug into the DK2000's four connectors. The DK2000 provides a Motorola MPC8260 PowerQUICC II communications processor, L2 cache, DRAM, flash memory, various clocks and support logic, and an RS-232 interface to a host PC. As shipped from the factory, the processor runs general-purpose firmware that executes reads and writes to the daughter cards on behalf of PC-based demo software.
DK101
Low-Cost Demo Kit Motherboard
DK2000
High-Performance Demo Kit Motherboard

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