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Analog Devices Inc./Maxim Integrated DS32503N
- Part No.:
- DS32503N
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 484-BGA Exposed Pad
- Datasheet:
-
DS32503N.pdf
- Description:
- TRIPLE-PORT DS3/E3/STS-1 LIU
- Quantity:
- Payment:
- Shipping:
Inventory:3,384
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Product details
Overview
DS32503N from Maxim Integrated is a triple-port line interface unit (LIU) for DS3, E3, and STS-1 telecom applications, featuring independent receive/transmit paths per port, on-chip jitter attenuators (16/32/64/128-bit buffer depth), full B3ZS/HDB3 encoding/decoding, and 1.8V/3.3V low-power operation across –40°C to +85°C. It supports 75Ω coaxial cable up to 457 meters and enables hot-swappable board redundancy.
For engineers reviewing the DS32503N datasheet, DS32503N pinout, DS32503N application, or DS32503N equivalent, key selection criteria include per-port software configurability for DS3/E3/STS-1, integrated clock adapter generating all line-rate clocks from one input (e.g., 77.76MHz), IEEE 1149.1 JTAG support, and three control interface options: 8/16-bit parallel, SPI, and hardware mode.
Technical Context
The DS32503N implements three independent LIU channels with separate CDR circuits, programmable internal line termination, and transmit waveshaping compliant with ANSI T1.231 and ITU G.775. Each port includes a dedicated jitter attenuator configurable in receive or transmit path with provisionable buffer depths (16–128 bits) and supports local/remote loopbacks plus PRBS/repetitive pattern generation/detection.
Its clock adapter (CLAD) synthesizes DS3 (44.736MHz), E3 (34.368MHz), STS-1 (51.84MHz), and auxiliary clocks (12.8/19.44/38.88/77.76MHz) from a single reference. The device uses 1:1 transformers on Tx/Rx, features open/short detection, LOS monitoring with automatic squelching, and 5V-tolerant I/O for interoperability with legacy systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Ports | 3 independent DS3/E3/STS-1 line interface channels |
| Operating Temp | –40°C to +85°C industrial range ensures reliability in telecom infrastructure environments |
| Supply Voltage | 1.8V core / 3.3V I/O with 5V-tolerant digital pins simplifies power design and legacy interface integration |
| Jitter Attenuator Buffer | Configurable per port at 16, 32, 64, or 128 bits for precise jitter filtering in timing-critical links |
| Cable Reach | Supports up to 457 m (1500 ft) of 75Ω coaxial cable via adaptive equalization and AGC |
| Standards Compliance | Fully compliant with ANSI T1.231 (DS3), ITU G.775 (E3), and GR-253-CORE (STS-1) |
| Control Interfaces | 8/16-bit parallel, SPI, and hardware mode enable flexible microprocessor or FPGA integration |
Pinout & Package
DS32503N is housed in a 13mm × 13mm, 144-pin TE-CSBGA package with 0.8mm pitch and exposed thermal pad. Pin assignments vary by control interface mode (parallel, SPI, or hardware); all modes share analog line interface pins (e.g., TXP/TXN, RXP/RXN per port), global resources (CLKIN, RESET#, JTAG), and power/ground distribution optimized for signal integrity in high-speed telecom PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXP0/TXN0 | Differential transmit output (Port 0) | Drives 75Ω coaxial line with standards-compliant waveshaping and line build-out control |
| RXP0/RXN0 | Differential receive input (Port 0) | Accepts degraded DS3/E3/STS-1 signals with adaptive equalization and AGC |
| CLKIN | Global reference clock input | Single input feeding CLAD to generate all line-rate clocks (e.g., 44.736MHz, 51.84MHz) |
| RESET# | Active-low asynchronous reset | Resets internal registers and state machines without requiring power cycle |
| TMS/TCK/TDI/TDO | JTAG boundary-scan interface | Enables IEEE 1149.1 compliance for production test and debug |
| VDDIO/VDDA/GND | Power supply and ground | Separate 3.3V I/O and 1.8V core rails with dedicated analog ground reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Per-port independent configuration | Each of three ports can be set to DS3, E3, or STS-1 mode simultaneously without shared resource conflict |
| Integrated jitter attenuator per port | Reduces accumulated jitter in long-haul networks while maintaining BER < 10⁻¹² under stress conditions |
| Built-in BERT with PRBS generation | Enables in-system bit error rate testing without external equipment using on-chip pattern generators/detectors |
| Hot-swap capable I/O | High-impedance Tx/Rx when VDD = 0 allows safe insertion/removal in live 1+1 redundant backplanes |
| Programmable internal line termination | Eliminates need for external resistors-only external 1:1 transformers required for impedance matching |
Applications
| Digital Cross-Connect Systems (DCS) | SONET/SDH Multiplexers |
|---|---|
Use Scenario: Aggregating and switching multiple DS3/E3 tributaries in central office DCS platforms. IC Role / Device Role / Timing Role: Line interface unit providing physical layer framing, clock recovery, and jitter attenuation for each tributary path. Use Value: Enables deterministic latency and sub-100ps peak-to-peak jitter performance required for synchronous network element interoperation. | Use Scenario: Adding DS3/E3 add-drop capability to OC-3/OC-12 SONET multiplexers. IC Role / Device Role / Timing Role: Physical layer interface converting electrical DS3/E3 signals to STS-1-compatible framing with embedded timing alignment. Use Value: Supports seamless interworking between PDH and SONET layers using a single chip per tributary, reducing board space and power vs. discrete solutions. |
| DSLAM Line Cards | WAN Routers with TDM Backhaul |
Use Scenario: Providing T1/E1 aggregation and DS3/E3 uplink interfaces in broadband access DSLAMs. IC Role / Device Role / Timing Role: Line interface handling physical layer signaling, loss-of-signal detection, and AIS generation for upstream transport links. Use Value: Delivers carrier-grade fault reporting (LOS, AIS, RAI) and automatic squelching to maintain service continuity during link degradation. | Use Scenario: Enabling legacy TDM circuit emulation over IP/MPLS in enterprise WAN routers. IC Role / Device Role / Timing Role: Physical layer transceiver bridging native DS3/E3 interfaces to packet-switched backplane with jitter-controlled clocking. Use Value: Maintains stratum-3 timing accuracy through integrated jitter attenuators and CLAD-synthesized clocks, meeting Telcordia GR-1244-CORE requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar line interface unit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS32502N | Dual-port variant with identical architecture, feature set, and pinout but two LIU channels instead of three | Suitable where only two DS3/E3/STS-1 ports are required, reducing component count and power draw | Select DS32502N for cost-sensitive dual-port designs; DS32503N provides scalability for three-tributary cards without redesign. |
| DS32504N | Quad-port variant sharing same package, temperature range, and interface options but supporting four independent LIU channels | Used in higher-density line cards requiring four DS3/E3/STS-1 interfaces, e.g., OC-48 add-drop multiplexers | Choose DS32504N when future expansion beyond three ports is anticipated; pin compatibility allows layout reuse. |
Compared with DS32502N and DS32504N, the DS32503N delivers optimal channel density for mid-scale telecom line cards-balancing port count, thermal dissipation, and PCB real estate without sacrificing jitter performance or standards compliance.
Availability
DS32503N is available at Aetrix Electronics and suitable for digital cross-connects, SONET/SDH multiplexers, and DSLAM line cards requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature operation.
Supply support for DS32503N 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 precision analog, mixed-signal, and high-reliability ICs for communications, industrial, and computing markets.
The DS32503N belongs to Maxim's line interface unit product line, designed specifically for carrier-class DS3/E3/STS-1 physical layer interfacing in telecom infrastructure equipment with emphasis on jitter control, hot-swap resilience, and multi-standard flexibility.
FAQ
What standards does the DS32503N comply with for DS3, E3, and STS-1 interfaces?
The DS32503N complies with ANSI T1.231 for DS3, ITU G.775 for E3, and GR-253-CORE for STS-1. Its transmit waveshaping, jitter tolerance, wander limits, and LOS detection meet these specifications. The device also satisfies IEEE 1149.1 for JTAG testability and supports B3ZS (DS3) and HDB3 (E3) line coding per standard requirements.
Does the DS32503N support hot-swap operation in redundant telecom systems?
Yes, the DS32503N supports hot-swap operation: its Tx and Rx pins remain in high-impedance state even when VDD = 0, enabling safe insertion and removal in live 1:1 or 1+1 board redundancy configurations without relays or external protection circuitry. This behavior is verified across the full –40°C to +85°C operating range.
How does the clock adapter (CLAD) in the DS32503N generate multiple line-rate clocks?
The DS32503N's on-chip clock adapter (CLAD) synthesizes all required line-rate clocks-including 44.736MHz (DS3), 34.368MHz (E3), 51.84MHz (STS-1), and auxiliary frequencies (12.8/19.44/38.88/77.76MHz)-from a single input reference clock. Configuration registers select the source and division/multiplication ratios, eliminating need for external clock generators or crystal oscillators per port.
Can the DS32503N perform bit error rate testing internally?
Yes, the DS32503N integrates a full Bit Error Rate Tester (BERT) per port, supporting PRBS (2⁷–2²³) and repetitive pattern generation/detection. It includes counters for error accumulation over intervals up to 1 second, enabling in-system validation of physical layer integrity without external test equipment.
What are the supported control interface modes for configuring the DS32503N?
The DS32503N supports three control interface modes: 8-bit or 16-bit parallel (Intel/Motorola timing), SPI serial (mode 0/3, configurable polarity/phase), and hardware mode (strap-pin configuration). Pin assignments differ per mode, but all share identical analog line interface and power connections-allowing flexible host processor integration.
DS32503N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 484-BGA Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Line Interface Unit (LIU)
- Interface:
- Parallel, SPI
- Number of Circuits:
- 3
- Voltage - Supply:
- 1.62V ~ 1.89V, 1.71V ~ 1.98V, 3.135V ~ 3.465V
- Current - Supply:
- 170mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 484-PBGA-HS (23x23)
DS32503N FAQ
1.How can I place an order for DS32503N through Aetrix?
Please submit a Request for Quotation (RFQ) for DS32503N 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 DS32503N reliable?
The price and inventory of DS32503N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS32503N is usually 5 days.
3.What payment methods are accepted for DS32503N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS32503N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS32503N?
DS32503N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS32503N 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 DS32503N?
For technical support, including DS32503N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS32503N requirements.
6.How does Aetrix verify that DS32503N is sourced from the original manufacturer or authorized distributors?
All DS32503N 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 DS32503N meets industry standards.
7.What is the process for return or replacement of DS32503N?
All DS32503N units undergo pre-shipment inspection (PSI). If there is an issue with DS32503N, 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 DS32503N part is unused and in its original packaging.
Return procedure for DS32503N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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