Ethernet Mapper with Integrated T1/E1/J1 Transceiver

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The DS33R11 extends a 10/100 Ethernet LAN segment by encapsulating MAC frames in HDLC or X.86 (LAPS) for transmission over a T1/E1/J1 data stream.

The device performs store-and-forward of packets with full wire-speed transport capability. The built-in Committed Information Rate (CIR) Controller provides fractional bandwidth allocation up to the line rate in increments of 512kbps. The DS33R11 can operate with an inexpensive external processor.

DS33R11: Functional Diagram DS33R11: Functional Diagram Enlarge+

Key Features

  • 10/100 IEEE 802.3 Ethernet MAC (MII and RMII) Half/Full Duplex with Automatic Flow Control
  • Integrated T1/E1/J1 Framer and LIU
  • HDLC/LAPS Encapsulation with Programmable FCS and Interframe Fill
  • Committed Information Rate Controller Provides Fractional Allocations in 512kbps Increments
  • Programmable BERT for Serial (TDM) Interface
  • External 16MB, 100MHz SDRAM Buffering
  • Parallel Microprocessor Interface
  • 1.8V, 3.3V Supplies
  • Reference Design Routes on Two Signal Layers
  • IEEE 1149.1 JTAG Support


  • Ethernet Delivery Over T1/E1/J1
  • LAN Extension
  • Transparent LAN Service

Technical Documents

App Note 4233 Carrier Ethernet Service Demarcation in Optical Networks
App Note 4118 DS33R11 Multichip-Module BSDL Testing
Tutorial 3849 Ethernet-over-PDH Technology Overview

Quality and Environmental Data

Product Reliability Reports: DS33R11.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

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05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.