Analog Devices Inc./Maxim Integrated DS33W11DK+

Overview

DS33W11DK+ from Maxim Integrated is a single-port Ethernet-over-PDH mapping device with integrated voice interface, supporting 10/100/1000Mbps MAC (GMII/MII/RMII), GFP-F/HDLC/X.86 encapsulation, and synchronous TDM serial interconnect up to 52Mbps over T1/E1/J1 or E3/T3. It features VCAT/LCAS link aggregation, QoS with VLAN/Q-in-Q/802.1p/DSCP, and external DDR SDRAM buffering - deployed in carrier-grade eLINE and bonded transparent LAN service gateways.

For engineers reviewing the DS33W11DK+ datasheet, DS33W11DK+ pinout, DS33W11DK+ application, or DS33W11DK+ equivalent, this page delivers verified technical context on Ethernet-to-TDM bridging, voice port integration, GFP-F encapsulation latency, differential delay tolerance (≤200ms), and SPI/parallel microprocessor interface timing - critical for telecom access equipment design and migration from legacy DS3/E3 infrastructure.

Technical Context

The DS33W11DK+ implements a store-and-forward Ethernet bridging architecture with wire-speed classification, priority queuing, and CIR/CBS policing. Its dual-domain clocking supports independent Ethernet MAC (125MHz GMII/25MHz MII) and TDM serial interface (up to 52MHz) domains, synchronized via internal PLLs and configurable clock dividers.

It integrates a dedicated voice port compliant with ITU-T G.703/G.704 framing, enabling direct connection to external codecs for simultaneous voice and data transport over PDH. The device uses an external 256Mb, 125MHz DDR SDRAM for frame buffering and supports both parallel (8-bit multiplexed) and SPI microprocessor interfaces for configuration and OAM frame handling.

Key Specifications

Pinout & Package

DS33W11DK+ is housed in a 256-ball, 17mm × 17mm CSBGA package (package code: 56-G6017-001), RoHS-compliant and rated for -40°C to +85°C industrial operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Ethernet-over-PDH mapping applications.

Compared with DS33X11+, DS33W11DK+ adds voice port capability without sacrificing Ethernet or TDM performance; compared with DS33W41+, it reduces pin count and power consumption while retaining full voice/data feature parity for single-link deployments.

Availability

DS33W11DK+ is available at Aetrix Electronics and suitable for bonded transparent LAN service gateways, eLINE metro access nodes, voice+data integration gateways, and DSLAM T1/E1 trunk cards requiring stable component supply across extended product lifecycles.

Supply support for DS33W11DK+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and digital ICs for communications, computing, and industrial systems.

The DS33W11DK+ belongs to Maxim's Ethernet-over-PDH mapping product line, designed specifically for carrier-class transport of Ethernet services over legacy TDM infrastructure with integrated voice support.

FAQ

What is the primary function of the DS33W11DK+ in telecom infrastructure?

The DS33W11DK+ functions as an Ethernet-over-PDH mapping device that encapsulates IEEE 802.3 frames into GFP-F, HDLC, or X.86 payloads for transport over T1/E1/J1 or T3/E3 circuits. It enables carrier-grade eLINE and bonded transparent LAN services while integrating a G.703-compliant voice port for combined voice/data backhaul - a key capability distinguishing DS33W11DK+ from non-voice variants like DS33X11+.

Does the DS33W11DK+ support JTAG boundary scan and what is its purpose?

Yes, the DS33W11DK+ includes IEEE 1149.1 JTAG support for boundary scan testing and in-system programming. This allows automated PCB test coverage of solder joints and interconnects during manufacturing, and facilitates debug access to internal registers and state machines without requiring additional probe points - critical for high-reliability telecom equipment where field serviceability and test repeatability are mandatory.

What memory interface does the DS33W11DK+ require and why is it essential?

The DS33W11DK+ requires an external 256Mb, 125MHz DDR SDRAM for frame buffering and store-and-forward operation. This external memory is essential because the device processes variable-length Ethernet frames at wire speed while compensating for TDM path skew (up to 200ms), performing QoS scheduling, and supporting GFP-F encapsulation - tasks demanding significantly more buffer depth than on-chip SRAM can provide. The DDR interface ensures deterministic latency and throughput for full-duplex 1Gbps Ethernet over PDH.

How does the DS33W11DK+ handle Quality of Service for mixed voice and data traffic?

The DS33W11DK+ implements hardware-based QoS using VLAN ID (802.1q), priority tagging (802.1p), DSCP classification, and CIR/CBS policing. Voice traffic from the G.703 port is mapped to highest-priority queues with strict shaper parameters, while Ethernet data is classified by VID or DSCP and assigned to weighted fair queues. This ensures low-latency, jitter-controlled voice transport alongside guaranteed bandwidth for data - all enforced in silicon without CPU intervention.

Is the DS33W11DK+ pin-compatible with other devices in the DS33X/W series?

No, the DS33W11DK+ is not pin-compatible with DS33X11+ or DS33W41+, despite sharing the same 256-ball CSBGA package footprint. Pin assignments differ significantly - especially for voice port signals (VIO_1, VCLK, VFRM), WAN interface lanes, and DDR bus routing. The DS33W11DK+ uses the DS33W41/DS33W11-specific pinout (Figure 7-2), requiring unique PCB layout; migration from DS33X11+ or DS33W41+ necessitates board redesign.