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Analog Devices Inc./Maxim Integrated DS33X81+
- Part No.:
- DS33X81+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 256-LBGA, CSBGA
- Datasheet:
-
DS33X81+.pdf
- Description:
- IC INTFACE SPECIALIZED 256CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,469
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Product details
Overview
DS33X81+ from Maxim Integrated is an Ethernet-over-PDH mapping IC that encapsulates IEEE 802.3 MAC frames (10/100/1000Mbps) using GFP-F, HDLC, cHDLC, or X.86 for transport over TDM networks. It features one Ethernet port, eight TDM ports, no voice interface, and operates across -40°C to +85°C. It enables eLINE and eLAN services in carrier-grade access equipment.
For engineers reviewing the DS33X81+ datasheet, DS33X81+ pinout, DS33X81+ application, or DS33X81+ equivalent, key selection criteria include its 8-channel TDM interface bandwidth, GMII/MII/RMII Ethernet compatibility, VCAT/LCAS link aggregation support, QoS policy enforcement via CIR/CBS policing, and DDR SDRAM buffering architecture.
Technical Context
The DS33X81+ implements a store-and-forward bridging engine with wire-speed Ethernet traffic classification, VLAN/Q-in-Q tagging, and DSCP-based priority queuing. Its packet processor supports programmable encapsulation modes (GFP-F, HDLC, cHDLC, X.86) and OAM frame extraction/insertion via μP interface.
It integrates dual clock domains: synchronous WAN serial interfaces (up to 52Mbps per TDM link) and asynchronous Ethernet MAC interfaces (GMII/MII/RMII), coordinated by a JTAG-accessible register map and SPI/parallel microprocessor interface for real-time configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Ethernet Ports | 1 × 10/100/1000Mbps MAC supporting GMII, MII, and RMII interfaces with autonegotiation and flow control |
| TDM Ports | 8 × synchronous serial ports supporting T1/E1/J1, T3/E3, OC-1, G.SHDSL, HDSL2/4 up to 52Mbps aggregate |
| Encapsulation | GFP-F, HDLC, cHDLC, and X.86 (LAPS) - selectable per channel for standards-compliant EoPDH service delivery |
| VCAT/LCAS | Supports dynamic link aggregation across up to 16 links with ≤200ms differential delay tolerance for resilient bandwidth scaling |
| QoS Engine | Hardware-accelerated traffic shaping with CIR/CBS policing, 802.1p, DSCP, and Q-in-Q VLAN prioritization |
| Memory Interface | External 256Mb, 125MHz DDR SDRAM buffer for frame storage and latency compensation |
| Power Supply | 1.8V, 2.5V, and 3.3V independent supply domains for I/O, core, and analog blocks |
Pinout & Package
The DS33X81+ is housed in a 256-ball, 17mm × 17mm CSBGA package (package code: 56-G6017-001), RoHS-compliant and rated for industrial temperature range (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GMII_TXD[7:0] | Ethernet Transmit Data Bus | 8-bit parallel output for GMII mode; timing-critical path requiring controlled impedance routing |
| MII_RXD[3:0] | Ethernet Receive Data Bus | 4-bit parallel input for MII mode; shared with RMII when configured for 10/100 operation |
| TDM_CLK[7:0] | TDM Serial Clock Input | Per-port synchronous clock input for framing alignment; supports master/slave mode selection |
| SDRAM_DQ[15:0] | DDR SDRAM Data Bus | 16-bit bidirectional data interface to external DDR SDRAM; requires matched trace lengths and termination |
| SPI_CS, SPI_SCLK, SPI_MOSI, SPI_MISO | Serial Peripheral Interface | 4-wire SPI interface for register configuration and status polling; operates up to 25MHz |
| JTAG_TCK, TMS, TDI, TDO | IEEE 1149.1 Boundary Scan | Test access port for production validation, debug, and in-system programming |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Encapsulation | Selectable GFP-F, HDLC, cHDLC, or X.86 per TDM channel enables interoperability with diverse PDH network elements |
| VCAT/LCAS Aggregation | Dynamic bandwidth allocation across up to 16 TDM links allows incremental service provisioning without circuit re-provisioning |
| Hardware QoS Enforcement | Dedicated CIR/CBS policer and 8-level priority queue ensure SLA-compliant traffic handling for mixed-service deployments |
| OAM Frame Handling | μP-accessible OAM extraction/insertion enables external processor to manage Ethernet service layer operations (e.g., Y.1731, IEEE 802.1ag) |
| Multi-Interface MAC | Single MAC supporting GMII (1000Mbps), MII (100Mbps), and RMII (10/100Mbps) reduces board-level interface complexity |
Applications
| Bonded Transparent LAN Service | LAN Extension Over T1/E1 |
|---|---|
Use Scenario: Carrier delivers point-to-point Layer 2 Ethernet connectivity between enterprise sites using bonded T1/E1 circuits. IC Role / Device Role / Timing Role: DS33X81+ performs GFP-F encapsulation of Ethernet frames into TDM payloads and manages VCAT/LCAS bundling across multiple T1/E1 links. Use Value: Enables deterministic bandwidth scaling and sub-50ms failover via LCAS, meeting carrier-grade SLA requirements for business Ethernet services. | Use Scenario: Remote office extends corporate LAN across legacy T1 infrastructure without deploying fiber or new routers. IC Role / Device Role / Timing Role: DS33X81+ acts as a wire-speed bridge and encapsulator, converting native Ethernet frames to HDLC-framed TDM streams for transparent transport. Use Value: Eliminates need for protocol translation gateways; preserves end-to-end Ethernet frame integrity and VLAN tags across the TDM segment. |
| E-Line Service Delivery | eLAN Service Aggregation |
Use Scenario: Service provider offers dedicated Ethernet virtual circuit (EVC) between two customer locations over shared PDH backbone. IC Role / Device Role / Timing Role: DS33X81+ applies VLAN ID filtering and 802.1p priority marking to isolate and prioritize EVC traffic on shared TDM infrastructure. Use Value: Guarantees per-customer traffic separation and QoS enforcement without requiring separate physical circuits. | Use Scenario: Metro aggregation node consolidates multiple customer LANs onto a single OC-1 or E3 uplink using multiplexed TDM channels. IC Role / Device Role / Timing Role: DS33X81+ bridges and filters traffic across 8 TDM ports while applying Q-in-Q tagging for hierarchical service demarcation. Use Value: Supports multi-tenant service delivery with independent VLAN management per customer, reducing port count and operational overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Ethernet-over-TDM mapping applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS33X82+ | Two Ethernet ports vs. one; identical TDM count (8), same package and feature set otherwise | Required where dual LAN uplinks or LAN/LAN bridging is needed; not suitable for single-port cost-optimized designs | Select DS33X82+ only if dual Ethernet interface functionality is required; DS33X81+ provides optimal BOM cost for single-LAN deployments |
| DS33X41+ | Four TDM ports (vs. eight); same single Ethernet port, identical encapsulation and QoS capabilities | Targeted at lower-bandwidth T1/E1 edge nodes or branch offices with fewer TDM circuits to manage | Choose DS33X41+ for reduced TDM port count and lower power consumption; DS33X81+ suits full-featured central office or aggregation points |
Compared with DS33X82+ and DS33X41+, the DS33X81+ uniquely balances 8-channel TDM capacity with single-Ethernet simplicity-making it the optimal choice for eLINE service cards and TDM-based LAN extension where port count and cost must be tightly aligned.
Availability
DS33X81+ is available at Aetrix Electronics and suitable for bonded transparent LAN service, LAN extension over T1/E1, E-Line delivery, and eLAN aggregation requiring stable component supply and long-term industrial temperature support.
Supply support for DS33X81+ 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 applications.
The DS33X81+ belongs to Maxim's Ethernet-over-PDH mapping product line, designed specifically for carrier-class TDM-to-Ethernet transport in metro access and business service edge platforms.
FAQ
What Ethernet interface standards does the DS33X81+ support?
The DS33X81+ supports IEEE 802.3-compliant 10/100/1000Mbps Ethernet via GMII, MII, and RMII physical interfaces. It includes autonegotiation, full/half-duplex flow control, and MDIO-based PHY management. All three modes are implemented in hardware and configurable via registers - the DS33X81+ does not require external glue logic to switch between them.
Does the DS33X81+ support VCAT/LCAS for link aggregation?
Yes, the DS33X81+ supports VCAT (Virtual Concatenation) and LCAS (Link Capacity Adjustment Scheme) per ITU-T G.7042. It enables dynamic bandwidth allocation across up to 16 TDM links with ≤200ms differential delay tolerance. The DS33X81+ handles VCAT control frame generation, LCAS status monitoring, and hitless bandwidth adjustment without host processor intervention.
What encapsulation protocols are supported by the DS33X81+ for TDM transport?
The DS33X81+ supports GFP-F (Generic Framing Procedure – Framed), HDLC (High-Level Data Link Control), cHDLC (Cisco HDLC), and X.86 (LAPS - Link Access Procedure for SDH). Each TDM port can be independently configured for any of these protocols, enabling interoperability with legacy and modern PDH/SONET/SDH infrastructure. The DS33X81+ implements full encode/decode and CRC generation/validation in hardware.
Is external memory required for DS33X81+ operation?
Yes, the DS33X81+ requires an external 256Mb, 125MHz DDR SDRAM for frame buffering and latency compensation. The device includes a dedicated DDR controller with programmable timing parameters and supports burst reads/writes. Without this external SDRAM, the DS33X81+ cannot perform store-and-forward bridging or traffic shaping - the DS33X81+ will not operate in functional mode if the SDRAM interface is unpopulated or misconfigured.
What is the operating temperature range and package type of the DS33X81+?
The DS33X81+ is specified for industrial operation from -40°C to +85°C and is packaged in a 256-ball, 17mm × 17mm CSBGA (package code 56-G6017-001) with lead-free/RoHS-compliant finish. This package supports automated assembly and meets IPC/JEDEC standards for thermal and mechanical reliability in carrier-grade networking equipment.
DS33X81+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 256-LBGA, CSBGA
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Data Transport
- Interface:
- Parallel/Serial
- Voltage - Supply:
- 1.8V, 2.5V, 3.3V
- Supplier Device Package:
- 256-CSBGA (17x17)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
DS33X81+ FAQ
1.How can I place an order for DS33X81+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS33X81+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS33X81+ reliable?
The price and inventory of DS33X81+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS33X81+ is usually 5 days.
3.What payment methods are accepted for DS33X81+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS33X81+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS33X81+?
DS33X81+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS33X81+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS33X81+?
For technical support, including DS33X81+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS33X81+ requirements.
6.How does Aetrix verify that DS33X81+ is sourced from the original manufacturer or authorized distributors?
All DS33X81+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS33X81+ meets industry standards.
7.What is the process for return or replacement of DS33X81+?
All DS33X81+ units undergo pre-shipment inspection (PSI). If there is an issue with DS33X81+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS33X81+ part is unused and in its original packaging.
Return procedure for DS33X81+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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