DS26503
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DS26503

T1/E1/J1 BITS Element

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Part Details
Features
  • G.703 2048kHz Synchronization Interface Compliant
  • G.703 6312kHz Japanese Synchronization Interface Compliant
  • Interfaces to Standard T1/J1 (1.544MHz) and E1 (2.048MHz)
  • Interface to CMI-Coded T1/J1 and E1
  • Short- and Long-Haul Line Interface
  • Transmit and Receive T1 and E1 SSM Messages with Message Validation
  • T1/E1 Jitter Attenuator with Bypass Mode
  • Fully Independent Transmit and Receive Functionality
  • Internal Software-Selectable Receive- and Transmit-Side Termination for 75Ω/100Ω/110Ω/120Ω
  • Monitor Mode for Bridging Applications
  • Accepts 16.384MHz, 12.8MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz Master Clock
  • 8-Bit Parallel Control Port, Multiplexed or Nonmultiplexed, Intel or Motorola
  • Serial (SPI) Control Port
  • Hardware Control Mode
  • Provides LOS, AIS, and LOF Indications Through Hardware Output Pins
  • Fast Transmitter-Output Disable Through Device Pin for Protection Switching
  • IEEE® 1149.1 JTAG Boundary Scan
  • 3.3V Supply with 5V-Tolerant Inputs and Outputs
Additional Details
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The DS26503 is a building-integrated timing-supply (BITS) clock-recovery element. It also functions as a basic T1/E1 transceiver. The receiver portion can recover a clock from T1, E1, and 6312kHz synchronization timing interfaces. In T1 and E1 modes, the Synchronization Status Message (SSM) can also be recovered. The transmit portion can directly interface to T1 or E1 interfaces as well as source the SSM in T1 and E1 modes. The DS26503 can translate between any of the supported inbound synchronization clock rates to any supported outbound rate. A separate output is provided to source a 6312kHz clock. The device is controlled through a parallel, serial, or hardware controller port.

Applications

  • Basic Transceiver
  • BITS Timing
  • Rate Conversion

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

DS26503DK

T1/E1/J1 BITS Element Design Kit

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DS26503DK

T1/E1/J1 BITS Element Design Kit

T1/E1/J1 BITS Element Design Kit

Features and Benefits

  • Expedites New Designs by Eliminating First-Pass Prototyping
  • Demonstrates Key Functions of DS26503 BITS Element
  • Includes DS26503 BITS Element, Transformers, BNC, and RJ48 Network Connectors and Termination Passives
  • BNC Connections for 75Ω E1
  • Bantam and RJ48 Connectors for 120Ω E1 and 100Ω T1
  • Interface Directly to Windows-Based Computers
  • ChipView Software Provides Point-and-Click Access to the DS26503 Register Set
  • Software-Controlled (Register Mapped) Configuration Switches to Facilitate Clock and Signal Routing
  • All Equipment-Side Framer Pins are Easily Accessible for External Data Source/Sink
  • LEDs for Loss-of-Signal and Interrupt Status as well as Indications for Multiple Clock and Signal Routing Configurations
  • Easy-to-Read Silkscreen Labels Identify the Signals Associated with All Connectors, Jumpers, and LEDs

Product Detail

The DS26503DK is an easy-to-use evaluation board for the DS26503 T1/E1/J1 BITS element. The DS26503DK is intended to be used as a stand-alone design kit. The board is complete with a DS26503 BITS element, transformers, termination resistors, FPGA-based configuration switches, and network connectors. Dallas' ChipView software gives pointand- click access to configuration and status registers from a Windows®-based PC. On-board LEDs indicate receive loss-of-signal and interrupt status as well as multiple clock and signal routing configurations.

Applications

  • Basic Transceiver
  • BITS Timing
  • Rate Conversion

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