DS26503

T1/E1/J1 BITS Element

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Status Explanations for product status codes

Part Number Status
DS26503 Active: In Production. See Ordering Information for details.

Description

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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 6 (PDF, 5.6MB)
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Errata DS26503 26503B1.pdf
Errata DS26503 26503A2.pdf
Errata DS26503 26503C1.pdf
An evaluation board is available: DS26503DK

Key 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
 

Applications/Uses

  • Basic Transceiver
  • BITS Timing
  • Rate Conversion
   

Key Specifications:

T/E Carrier & Packetized Products
Part Number Transmission Standard Functions Channels In-to-Out Clocks
(MHz)
VSUPPLY
(V)
Budgetary
Price
See Notes
DS26503  T1/E1/J1 BITS Element 1
1.544
2.048
6.312
3.3 $11.85 @1k
See All T/E Carrier & Packetized Products (88)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

DS26503: Block Diagram
Block Diagram

More Information

DS26503DK Design Kit

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Information Index

Rev 6; 2008-01-16
This page last modified: 2009-10-07