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DS33Z44 - Quad Ethernet Mapper

General Description

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.

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 fo.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DS33Z44 Quad Ethernet Mapper www.maxim-ic.com GENERAL DESCRIPTION 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. FEATURES ยง Four 10/100 IEEE 802.