Quad Ethernet Mapper

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Status Explanations for product status codes

Active: In Production.


The DS33Z44 extends four 10/100 Ethernet LAN segments by encapsulating MAC frames in HDLC or X.86 (LAPS) for transmission over four PDH/TDM data streams. The serial links support bidirectional synchronous interconnect up to 52Mbps over xDSL, T1/E1/J1, T3/E3, V.35/Optical, OC-1/EC-1, or SONET/SDH Tributary.

The device performs store-and-forward of packets with full wire-speed transport capability. The built-in Committed Information Rate (CIR) controllers provide fractional bandwidth allocation up to the line rate in increments of 512kbps. The DS33Z44 can operate with an inexpensive external processor, EEPROM or in a stand-alone hardware mode.

Data Sheet

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An evaluation board is available: DS33Z44DK

Key Features

  • Four 10/100 IEEE 802.3 Ethernet MACs (MII and RMII) Half/Full-Duplex with Automatic Flow Control
  • Four 52Mbps Synchronous TDM Serial Ports with Independent Transmit and Receive Timing
  • HDLC/LAPS Encapsulation with Programmable FCS and Interframe Fill
  • Committed Information Rate Controllers Provide Fractional Allocations in 512kbps Increments
  • Programmable BERT for Serial (TDM) Interfaces
  • External 16MB, 100MHz SDRAM Buffering
  • Parallel Microprocessor Interface
  • SPI Interface and Hardware Mode for Operation Without a Host Processor
  • 1.8V Operation with 3.3V Tolerant I/O
  • IEEE 1149.1 JTAG Support


  • Ethernet Delivery Over T1/E1/J1, T3/E3, OC-1/EC-1, G.SHDSL, or HDSL2/4
  • LAN Extension
  • Transparent LAN Service

Key Specifications:

T/E Carrier & Packetized Products
Part Number Transmission Standard Functions Channels VSUPPLY
See Notes
DS33Z44  Ethernet/Serial TDM Ethernet Mapper 4 3.3 $62.62 @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.


DS33Z44: Functional Diagram
Functional Diagram

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Information Index

Rev 1; 2006-12-20
This page last modified: 2009-10-06