DS33Z41

Specialized Overview

The DS33Z41 is a Quad IMUX Ethernet Mapper designed to extend 10/100 Ethernet LAN segments by encapsulating MAC frames in HDLC or X.86 (LAPS) for transmission over up to four interleaved PDH/TDM data streams. It features a 10/100 IEEE 802.3 Ethernet MAC supporting MII and RMII interfaces with half/full duplex operation and automatic flow control. The device supports Layer 1 inverse multiplexing, bonding up to four T1/E1/J1 links, and includes a Committed Information Rate controller for fractional bandwidth allocation in 512kbps increments. Operating at 1.8V with 3.3V tolerant I/O, it utilizes external 16MB SDRAM buffering and provides a parallel microprocessor interface within a 169-ball CSBGA package.

Specialized Feature Summary

• Supports Layer 1 Inverse Multiplexing to bond up to four T1/E1/J1 or DSL links
• Encapsulates Ethernet traffic using HDLC or X.86 (LAPS) protocols
• Includes a Committed Information Rate Controller for fractional bandwidth allocation
• Features an Interleave Bus serial link for seamless interconnection with T1/E1 framers

Specialized Applications

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

Specialized Procurement Notes

Verify the specific revision of the DS33Z41 against the manufacturer's errata sheet before finalizing designs, as multiple revisions may be available simultaneously through various sales channels. Confirm that the required external 16MB SDRAM components meet the specified timing requirements for the memory interface. Ensure the design accommodates the 1.8V core voltage and 3.3V tolerant I/O levels for proper signal integrity.

Specialized Selection Notes

Select the DS33Z41 when extending Ethernet LANs over TDM infrastructure requiring inverse multiplexing of up to four T1/E1/J1 links. This component is suitable for applications needing HDLC or LAPS encapsulation and precise bandwidth management via the CIR controller. Consider the 169-ball CSBGA package constraints and the necessity for external SDRAM buffering when evaluating system architecture and board space.

Specialized Part Context

The DS33Z41 belongs to the Maxim Integrated family of specialized interface ICs focused on telecommunications and data transport. It serves as a bridge between Ethernet packet systems and WAN TDM systems like T1/E1/J1. Functionally, it maps Ethernet frames onto TDM streams, enabling efficient use of existing telecommunication infrastructure for data services while maintaining wire-speed performance.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices Inc./Maxim Integrated for current availability and potential obsolescence notices regarding this component.

Specialized FAQ

What encapsulation protocols does the DS33Z41 support?

The DS33Z41 supports HDLC and X.86 (LAPS) encapsulation for mapping Ethernet MAC frames onto TDM data streams.

How many TDM links can be bonded using this device?

The device allows for the bonding of up to four T1/E1/J1 or DSL links through its Layer 1 Inverse Multiplexing capability.

What is the function of the Committed Information Rate (CIR) Controller?

The CIR Controller provides fractional bandwidth allocation up to the line rate in increments of 512kbps.