DS33Z41 Quad IMUX Ethernet Mapper

1 DESCRIPTION

The DS33Z41 provides interconnection and mapping functionality between Ethernet Packet Systems and WAN Time-Division Multiplexed (TDM) systems such as T1/E1/J1, HDSL, and T3/E3. The device is composed of a 10/100 Ethernet MAC, Packet Arbiter, Committed Information Rate controller (CIR), HDLC/X.86 (LAPS) Mapper, SDRAM interface, control ports, and Bit Error Rate Tester (BERT). The packet interface consists of an Ethernet interface using several physical layer protocols. The Ethernet interface can be configured for 10Mbps or 100Mbps service. The DS33Z41 encapsulates Ethernet traffic with HDLC or X.86 (LAPS) to be transmitted over the WAN interface. The WAN interface also receives encapsulated Ethernet packets and transmits the extracted packets over the Ethernet port. The WAN physical interface is based on the Dallas Semiconductor Interleaved Bus Operation (IBO), running at 8.192Mbps. The IBO interface can be configured to allow up to four bonded T1 or E1 data streams. The IBO interface provides for seamless connection to the Dallas Semiconductor/Maxim multi-port T1/E1/J1 Framers and Single-Chip Transceivers (SCTs). See Application Note 3411: DS33Z11—Ethernet LAN to Unframed T1/E1 WAN Bridge for an example of a complete LAN to WAN solution.

The DS33Z41 is controlled through an 8-bit microcontroller port. The DS33Z41 has a 100MHz SDRAM controller and interfaces to a 32-bit wide 128Mb SDRAM. The SDRAM is used to buffer the data from the Ethernet and WAN ports for transport. The external SDRAM can accommodate up to 8192 frames with a maximum frame size of 2016 bytes. The DS33Z41 operates with a 1.8V core supply and 3.3V I/O supply.

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Maxim DS33Z41 specifications Description