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Analog Devices Inc./Maxim Integrated DS2155GNC2+
- Part No.:
- DS2155GNC2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- -
- Datasheet:
-
DS2155GNC2+.pdf
- Description:
- IC TXRX T1/E1/J1 100-CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
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Product details
Overview
DS2155GNC2+ from Maxim Integrated is a software-selectable T1/E1/J1 single-chip transceiver (SCT) integrating line interface unit (LIU), framer, dual HDLC controllers, and TDM backplane interface. It supports long-haul and short-haul operation with programmable 75Ω/100Ω/120Ω termination, crystal-less jitter attenuation, and CMI coding for optical interfaces. Used in telecom line cards requiring multi-standard compatibility and asynchronous backplane connectivity up to 16.384MHz.
For engineers reviewing the DS2155GNC2+ datasheet, DS2155GNC2+ pinout, DS2155GNC2+ application, or DS2155GNC2+ equivalent, key selection criteria include software-selectable T1/E1/J1 mode, dual elastic-store slip buffers, synthesized clock outputs (2.048–16.384MHz), and JTAG boundary-scan test support for production validation.
Technical Context
The DS2155GNC2+ implements independent transmit and receive paths with full G.703-compliant E1 waveform generation for both 75Ω coax and 120Ω twisted-pair, plus T1 DSX-1 and CSU line buildouts (-7.5dB, -15dB, -22.5dB). Its LIU includes jitter attenuator, open/short-circuit detection, and BPV error insertion.
It features dual HDLC controllers with FIFO-based packet handling, programmable BERT generator/detector, and fractional T1/E1 support. The TDM backplane interface operates asynchronously up to 16.384MHz using dual two-frame elastic-store buffers, synchronized to recovered network clock via internal synthesizer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| T1/E1/J1 Support | Software-selectable single-chip operation across all three standards-no hardware change required for regional deployment. |
| Operating Temp Range | -40°C to +85°C-qualified for industrial and telecom infrastructure environments including outdoor cabinets and central offices. |
| Package | 100-ball CSBGA (5.0mm × 5.0mm, 0.5mm pitch)-enables high-density PCB layout for multi-port line cards. |
| Jitter Attenuation | Crystal-less architecture with integrated PLL-eliminates external crystal and reduces BOM count while meeting GR-499 jitter specs. |
| Backplane Clock Synthesis | Generates 2.048MHz, 4.096MHz, 8.192MHz, or 16.384MHz clocks locked to recovered network timing-supports synchronous TDM interconnect without external clock sources. |
| HDLC Controllers | Dual independent controllers with configurable FIFO depth-enables simultaneous signaling channel handling (e.g., CAS + CCS) in voice/data gateways. |
| Termination Resistors | Internally programmable 75Ω, 100Ω, or 120Ω on transmit/receive sides-replaces discrete resistor networks and simplifies board-level tuning per cable type. |
Pinout & Package
DS2155GNC2+ uses a 100-ball Chip Scale Ball Grid Array (CSBGA) package measuring 5.0mm × 5.0mm with 0.5mm ball pitch. Pin functions are defined per Maxim's official 10mm CSBGA configuration (document revision 080607, Figure 4-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TDI, TDO, TCK, TMS, TRST# | JTAG Test Access Port | Enables IEEE 1149.1 boundary-scan testing and in-system programming without dedicated debug headers. |
| TXP/N, RXP/N | Differential Line Interface | Direct connection to transformer-coupled T1/E1 physical layer-supports AC-coupled 75Ω/120Ω media interfaces. |
| CLKOUT[3:0] | Synthesized Backplane Clock Outputs | Four selectable clock outputs derived from recovered network timing-drives multiple downstream TDM devices synchronously. |
| HDLC_RXD/HDLC_TXD | HDLC Serial Data I/O | Full-duplex serial interface for embedded processor communication-supports standard HDLC framing with CRC-16/CRC-32 options. |
| INT#, RESET#, PWDN# | Control & Status Signals | Asynchronous interrupt assertion, hardware reset, and power-down enable-facilitates low-power standby and fault recovery in carrier-grade systems. |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable T1/E1/J1 mode | Single firmware image supports global deployment across North America, Europe, and Japan-reduces inventory SKUs and qualification effort. |
| Dual elastic-store slip buffers | Two independent two-frame buffers absorb frequency offset between network and backplane clocks-enables robust operation with ±100ppm mismatch. |
| Programmable BERT generator/detector | On-chip bit-error rate testing at line rate-eliminates need for external test equipment during manufacturing and field diagnostics. |
| G.706 CRC-4 updating (E1 only) | Hardware-accelerated CRC-4 calculation for E1 multiframes-offloads processor and ensures real-time alarm reporting per ITU-T G.704. |
| Interleaved PCM bus (IBO) mode | Supports channel- or frame-interleaved data mapping-optimizes bandwidth utilization on shared backplanes with legacy TDM switches. |
Applications
| T1/E1/J1 Line Cards | Switches and Routers |
|---|---|
Use Scenario: High-density telecom access line cards aggregating 32+ T1/E1 links into IP/MPLS core networks. IC Role / Device Role / Timing Role: Primary line-side transceiver providing physical layer framing, clock recovery, and HDLC signaling processing. Use Value: Software-selectable standard eliminates separate BOMs for regional variants; dual HDLC controllers handle CAS and CCS signaling simultaneously. | Use Scenario: Edge routers performing TDM-to-packet conversion in mobile backhaul and enterprise WAN aggregation. IC Role / Device Role / Timing Role: TDM interface IC bridging legacy circuit-switched networks to packet infrastructure with precise jitter control. Use Value: Crystal-less jitter attenuator meets GR-499 mask requirements without external components-reducing footprint and cost. |
| Add-Drop Multiplexers | VoIP Gateways |
Use Scenario: Central office ADMs inserting/dropping DS0 channels across multiple T1/E1 spans while maintaining synchronization. IC Role / Device Role / Timing Role: Synchronized TDM transceiver with elastic store buffers enabling seamless cross-connect of asynchronous tributaries. Use Value: Dual two-frame slip buffers tolerate ±100ppm clock drift between upstream/downstream links-ensuring zero data loss during switching. | Use Scenario: Carrier-class VoIP gateways converting analog/PRI lines to SIP/RTP streams in PSTN interconnection points. IC Role / Device Role / Timing Role: ISDN-PRI transceiver handling D-channel signaling and B-channel PCM transport with hardware CRC checking. Use Value: Integrated G.706 CRC-4 engine accelerates E1 alarm detection-meeting sub-100ms ITU-T O.150 response time requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1/E1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2155LN+ | LQFP-100 package instead of CSBGA; identical electrical specs and feature set. | Better suited for prototyping or low-volume designs where reworkability matters more than board density. | Select DS2155LN+ when manual soldering or thermal cycling reliability is prioritized over miniaturization. |
| DS2156L+ | Pin- and software-compatible successor with enhanced jitter performance and extended temperature range support. | Required for new designs targeting GR-1244-CORE compliance or operating beyond +85°C ambient. | Choose DS2156L+ for next-generation platforms needing improved jitter tolerance and future-proof lifecycle support. |
Compared with DS2155GNC2+, DS2155LN+ offers identical functionality in a rework-friendly LQFP package, while DS2156L+ delivers measurable jitter improvement and broader temp range-making it suitable for high-reliability deployments where DS2155GNC2+ may reach its specification limits.
Availability
DS2155GNC2+ is available at Aetrix Electronics and suitable for telecom line cards, carrier-grade switches and routers, add-drop multiplexers, and VoIP gateways requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support.
Supply support for DS2155GNC2+ 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 RF solutions for communications, computing, and industrial markets.
The DS2155 product line was designed specifically for carrier-class T1/E1/J1 line interface applications-emphasizing software configurability, jitter resilience, and integration density to reduce system-level complexity in telecom infrastructure.
FAQ
What is the operating temperature range of the DS2155GNC2+?
The DS2155GNC2+ is rated for industrial operation from -40°C to +85°C. This range is validated per Maxim's qualification standards and supports deployment in uncontrolled environments such as roadside cabinets, base station shelters, and central office equipment rooms. The DS2155GNC2+ maintains full functional specification-including jitter attenuation, line buildout accuracy, and HDLC throughput-across this entire range.
Does the DS2155GNC2+ require an external crystal oscillator?
No, the DS2155GNC2+ incorporates a crystal-less jitter attenuator using an integrated PLL architecture. It recovers and cleans network timing without needing an external crystal, reducing bill-of-materials cost and PCB area. External crystals remain optional for applications requiring ultra-low phase noise or specific clock tree alignment, but are not required for standard T1/E1 operation.
How does the DS2155GNC2+ handle different line impedances?
The DS2155GNC2+ provides internal software-selectable termination resistors of 75Ω, 100Ω, and 120Ω on both transmit and receive sides. This allows direct matching to common T1/E1 media types-including 75Ω coaxial cable (E1/G.703), 120Ω twisted pair (E1), and DSX-1 metallic interfaces-without external resistor networks or jumpers, simplifying board design and field configuration.
Is the DS2155GNC2+ pin-compatible with other devices in the DS2155 family?
Yes, all DS2155 variants-including DS2155GNC2+, DS2155LN+, and DS2155L+-share identical pinouts within their respective packages (CSBGA or LQFP). The DS2155GNC2+ is mechanically and electrically compatible with other DS2155Gx variants, enabling drop-in replacement across temperature grades and RoHS compliance levels without layout changes.
What clock frequencies can the DS2155GNC2+ synthesize for the backplane interface?
The DS2155GNC2+ synthesizes four fixed backplane clock frequencies-2.048MHz, 4.096MHz, 8.192MHz, and 16.384MHz-all phase-locked to the recovered network clock. These outputs drive TDM backplanes in synchronous mode, supporting standard PCM rates and enabling interoperability with legacy switch fabrics and DSP subsystems without external clock generators.
DS2155GNC2+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Obsolete
- Function:
- -
- Interface:
- -
- Number of Circuits:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DS2155GNC2+ FAQ
1.How can I place an order for DS2155GNC2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2155GNC2+ 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 DS2155GNC2+ reliable?
The price and inventory of DS2155GNC2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2155GNC2+ is usually 5 days.
3.What payment methods are accepted for DS2155GNC2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2155GNC2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2155GNC2+?
DS2155GNC2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2155GNC2+ 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 DS2155GNC2+?
For technical support, including DS2155GNC2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2155GNC2+ requirements.
6.How does Aetrix verify that DS2155GNC2+ is sourced from the original manufacturer or authorized distributors?
All DS2155GNC2+ 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 DS2155GNC2+ meets industry standards.
7.What is the process for return or replacement of DS2155GNC2+?
All DS2155GNC2+ units undergo pre-shipment inspection (PSI). If there is an issue with DS2155GNC2+, 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 DS2155GNC2+ part is unused and in its original packaging.
Return procedure for DS2155GNC2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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