Analog Devices Inc./Maxim Integrated DS34S132GNA2+

Overview

DS34S132GNA2+ from Maxim Integrated is a 32-port TDM-over-Packet IC designed for circuit emulation in packet-switched networks. It supports T1/E1 and sub-E1 rates (64Kbps–2.048Mbps) across 32 independent TDM ports, maps time slots to up to 256 pseudowires, and complies with IETF PWE3 SAToP/CESoPSN/HDLC standards for L2TPv3/IP, UDP/IP, MPLS (MFA-8), and Metro Ethernet (MEF-8) transport while meeting ITU G.823/G.824/G.8261 jitter and wander requirements.

For engineers reviewing the DS34S132GNA2+ datasheet, DS34S132GNA2+ pinout, DS34S132GNA2+ application, or DS34S132GNA2+ equivalent, key selection criteria include per-port clock recovery architecture, 256 configurable pseudowires, MII/GMII 100/1000Mbps Ethernet interface, structured/unstructured HDLC/SAT/CES engine support, and DDR SDRAM interfacing capability for high-density TDMoP gateway designs.

Technical Context

The DS34S132GNA2+ implements 32 independent clock recovery engines-one per TDM port-with selectable adaptive, differential, or absolute timestamping modes. Each port supports synchronous or asynchronous timing, with two dedicated clock inputs for direct transmit timing control and one assignable as global reference.

It integrates 32 HDLC/CES engines (256 total), supporting both CAS-signaled and CAS-less structured T1/E1, plus unstructured HDLC/SAT engines at variable data rates. Packet processing includes full MEF-8 and MFA-8 compliant classification, generation, and OAM handling (in-band VCCV, MEF OAM, NDP/IPv6, ARP) over a single MII/GMII MAC.

Key Specifications

Pinout & Package

DS34S132GNA2+ is housed in a 676-ball fine-pitch BGA (19mm × 19mm, 0.8mm pitch) with power/ground ball optimization for signal integrity and thermal dissipation in high-density TDMoP line cards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TDM-over-packet interworking applications.

Compared with PM5358 and TSI578, DS34S132GNA2+ delivers higher port density (32 vs. 16/8), integrated clock recovery per port, and unified support for SAToP, CESoPSN, and raw HDLC-all within a single BGA package-making it optimal for compact, high-throughput TDMoP line cards.

Availability

DS34S132GNA2+ is available at Aetrix Electronics and suitable for cellular backhaul gateways, metro Ethernet TDM emulation nodes, and GPON/EPON edge concentrators requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for DS34S132GNA2+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital ICs for communications, computing, and industrial systems.

The DS34S132GNA2+ belongs to Maxim's TDM-over-Packet product line, engineered specifically for carrier-class circuit emulation in next-generation packet-switched networks-balancing integration, timing precision, and protocol flexibility.

FAQ

What is the primary function of the DS34S132GNA2+ in TDM-over-Packet systems?

The DS34S132GNA2+ serves as a full-featured TDM-over-Packet interworking function (IWF) IC. It converts T1/E1 and subrate TDM streams into pseudowires for transport over IP, MPLS, or Metro Ethernet networks. Its role includes time-slot mapping, clock recovery, HDLC/SAT/CES encapsulation, and OAM handling-all implemented in a single chip to replace multi-chip legacy solutions. DS34S132GNA2+ ensures compliance with IETF PWE3 standards and ITU timing specifications critical for carrier-grade deployment.

Does the DS34S132GNA2+ support both structured and unstructured TDM emulation?

Yes, DS34S132GNA2+ supports both modes. For structured T1/E1, it provides CAS-aware circuit emulation with time-slot assignment (TSA) and frame alignment. For unstructured data, it offers HDLC/SAT engines capable of handling any bit rate from 64Kbps to 2.048Mbps without framing constraints. This dual capability allows DS34S132GNA2+ to serve diverse applications-from voice trunking to industrial telemetry-without hardware changes.

How many pseudowires can the DS34S132GNA2+ manage simultaneously?

The DS34S132GNA2+ supports up to 256 individually configurable pseudowires, with a maximum of 32 per TDM port. Each pseudowire can be independently assigned to carry SAToP, CESoPSN, or HDLC-encapsulated traffic, and may include zero, one, or two VLAN tags per IEEE 802.1Q. This scalability makes DS34S132GNA2+ suitable for high-density aggregation nodes where service differentiation and bandwidth partitioning are essential.

What clocking architectures does the DS34S132GNA2+ provide for TDM port synchronization?

DS34S132GNA2+ implements one dedicated clock recovery engine per TDM port, supporting adaptive, differential, and absolute timestamping methods. It allows synchronous or asynchronous TDM port timing, with two global clock inputs (CLKIN0/CLKIN1) for direct transmit timing control. One engine can be designated as a global reference, enabling hierarchical timing distribution across all 32 ports-ensuring DS34S132GNA2+ meets stringent ITU G.823/G.824 wander requirements in public network deployments.

Is the DS34S132GNA2+ compatible with DDR SDRAM for external memory expansion?

Yes, DS34S132GNA2+ includes a dedicated DDR SDRAM interface supporting 16-bit data width, address multiplexing, and DQS strobes. This interface is used for jitter buffer storage, packet buffering, and descriptor tables-enabling flexible latency management and large-scale buffering without external logic. The DS34S132GNA2+ DDR controller complies with JEDEC DDR-400 timing specifications and supports programmable refresh and burst configurations tailored to TDMoP traffic patterns.