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Analog Devices Inc./Maxim Integrated DS2155GN
- Part No.:
- DS2155GN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 100-LFBGA, CSPBGA
- Datasheet:
-
DS2155GN.pdf
- Description:
- IC TELECOM INTERFACE 100CSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,682
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Product details
Overview
DS2155GN 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 operates across -40°C to +85°C, supports 75Ω/120Ω media, delivers CMI coding, crystal-less jitter attenuation, and programmable termination resistors for telecom line cards.
For engineers reviewing the DS2155GN datasheet, DS2155GN pinout, DS2155GN application, or DS2155GN equivalent, key selection criteria include T1/E1/J1 protocol flexibility, dual elastic-store slip buffers for asynchronous backplanes up to 16.384MHz, software-configurable bus interface (Intel/Motorola), and integrated BERT generator/detector for in-system validation.
Technical Context
The DS2155GN implements independent transmit and receive paths with full T1 (DS1), E1 (CEPT PCM-30), and J1 protocol support - including D4/SLC-96 framing, G.703 compliance for coax/twisted-pair, and ISDN-PRI signaling. Its LIU provides CSU line buildouts (-7.5dB/-15dB/-22.5dB) for T1 and selectable termination (75Ω/100Ω/120Ω).
It features dual two-frame elastic-store slip buffers synchronized to recovered network clock, programmable backplane clock synthesis (2.048–16.384MHz), and JTAG boundary-scan test access. The parallel control port supports both multiplexed and nonmultiplexed 8-bit Intel/Motorola timing modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protocol Support | T1, E1, and J1 - enables single-hardware platform deployment across North America, Europe, and Japan telecom infrastructures. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and carrier-grade long-haul/short-haul line card environments. |
| Package | 100-ball CSBGA (56-G6008-001) - 10mm × 10mm footprint with fine-pitch ball grid array for high-density PCB routing. |
| Jitter Attenuation | Crystal-less architecture - eliminates external crystal requirement while meeting GR-499-CORE phase jitter specs for T1/E1 recovery. |
| Backplane Clock Output | 16.384MHz, 8.192MHz, 4.096MHz, or 2.048MHz - synthesized from recovered network clock, enabling synchronous TDM interconnect without external PLL. |
| HDLC Controllers | Dual independent HDLC engines - supports simultaneous channelized data transport (e.g., signaling + payload) over same physical interface. |
| Line Interface Termination | Software-selectable 75Ω/100Ω/120Ω - allows field-reconfigurable adaptation to coaxial or twisted-pair E1/T1 cabling without hardware change. |
Pinout & Package
DS2155GN uses a 100-ball CSBGA package (56-G6008-001), with ball pitch of 0.8mm and body size 10mm × 10mm. Pin functions are defined per Maxim's official pin configuration diagram (Figure 4-1, DS2155 datasheet Rev 080607).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TDI, TDO, TCK, TMS, TRST | JTAG Test Access Port | Enables IEEE 1149.1 boundary-scan testing, in-circuit debugging, and production verification without intrusive probing. |
| TXP/N, RXP/N | Differential Line Transmit/Receive | LVDS-compatible differential pairs for direct connection to transformer-coupled T1/E1 line drivers/receivers. |
| CLKOUT | Synthesized Backplane Clock Output | Provides jitter-clean, frequency-programmable clock derived from recovered network timing for TDM backplane synchronization. |
| CS#, RD#, WR#, A0–A2 | Parallel Control Bus Interface | Configurable for Intel- or Motorola-style 8-bit addressing/control - supports legacy and modern microcontroller host integration. |
| VDDIO, VDDA, VDDD, AGND, DGND | Power Supply Terminals | Separate analog/digital I/O/power domains minimize noise coupling between LIU, framer, and digital logic sections. |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable T1/E1/J1 mode | Single firmware image supports all three standards - reduces inventory SKUs and simplifies global product certification. |
| Dual elastic-store slip buffers | Two independent two-frame buffers enable seamless rate adaptation between asynchronous backplane clocks and recovered network timing. |
| Programmable BERT generator/detector | On-chip bit-error-rate test capability eliminates need for external test equipment during system bring-up and field diagnostics. |
| CMI coder/decoder | Integrated Coded Mark Inversion logic meets optical interface requirements per GR-253-CORE for SONET/SDH transport layers. |
| Crystal-less jitter attenuator | Reduces bill-of-materials cost and board space by removing external crystal oscillator while maintaining GR-499-CORE jitter performance. |
Applications
| Telecom Line Cards | Network Edge Routers |
|---|---|
Use Scenario: Embedded in modular T1/E1 line interface cards for central office and remote terminal applications. IC Role / Device Role / Timing Role: Primary transceiver handling line-side signal conditioning, frame alignment, HDLC processing, and TDM backplane interfacing. Use Value: Eliminates discrete framer + LIU + clock recovery ICs - reduces component count by ≥3 and improves timing integrity via on-die jitter attenuation. | Use Scenario: Used in carrier-class edge routers supporting mixed T1/E1 WAN interfaces and VoIP gateway functions. IC Role / Device Role / Timing Role: Dual-role device acting as both line-side transceiver and backplane-facing TDM controller with programmable clock synthesis. Use Value: Enables deterministic latency through elastic-store buffering and eliminates external clock synthesizer - critical for real-time voice packetization. |
| Add-Drop Multiplexers (ADMs) | ISDN-PRI Gateways |
Use Scenario: Deployed in metro ADMs requiring flexible T1/E1 tributary mapping and in-band management channel support. IC Role / Device Role / Timing Role: Handles per-channel framing, CAS/CCS signaling extraction, and error monitoring (LCV, PCV, FOS) with register-accessible counters. Use Value: Integrated BERT and error counters allow continuous link health assessment without CPU overhead or external monitoring hardware. | Use Scenario: Integrated into enterprise ISDN-PRI gateways connecting PBX systems to telco E1/T1 trunks. IC Role / Device Role / Timing Role: Performs E1 PCM-30 or T1 DS1 framing, D-channel HDLC processing, and transparent B-channel payload transport. Use Value: Dual HDLC controllers manage separate D-channel signaling and embedded OAM channels - enabling concurrent call setup and maintenance traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1/E1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2156LN+ | Pin- and software-compatible with DS2155GN but includes enhanced E1 CAS detection and extended jitter tolerance per ITU-T G.823. | Preferred for new designs targeting strict ETSI-compliant European deployments where CAS reliability is critical. | Select DS2156LN+ when E1 CAS robustness and extended temperature operation (-40°C to +85°C) are required without redesign. |
| MC2155G | Functionally identical architecture and pinout; manufactured by Microchip (acquired Maxim's timing business); identical CSBGA-100 packaging and spec compliance. | No functional or layout impact - drop-in replacement with same qualification status and lifecycle support. | Choose MC2155G for continuity sourcing post-Maxim acquisition; identical electrical and thermal behavior to DS2155GN. |
Compared with DS2155GN, DS2156LN+ adds E1 CAS enhancements for mission-critical trunking, while MC2155G offers identical functionality under Microchip's supply chain - making DS2155GN optimal for legacy Maxim-design ecosystems and DS2156LN+/MC2155G better suited for new designs requiring extended support or regional compliance.
Availability
DS2155GN is available at Aetrix Electronics and suitable for telecom line cards, network edge routers, add-drop multiplexers, and ISDN-PRI gateways requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for DS2155GN 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 DS2155GN belongs to Maxim's telecom transceiver product line, designed specifically for carrier-grade T1/E1/J1 line interface applications demanding protocol flexibility, jitter resilience, and integration density in compact form factors.
FAQ
What is the operating temperature range of the DS2155GN?
The DS2155GN is rated for industrial operation from -40°C to +85°C. This wide temperature range ensures reliable performance in uncontrolled environments such as outdoor cabinets, central office shelves, and remote terminal units. The DS2155GN maintains full specification compliance-including jitter attenuation, line drive amplitude, and timing accuracy-across this entire range, as verified in Maxim's characterization reports.
Does the DS2155GN require an external crystal oscillator?
No, the DS2155GN incorporates a crystal-less jitter attenuator that meets GR-499-CORE specifications without needing an external crystal. This internal architecture reduces component count, PCB area, and potential failure points. The DS2155GN recovers and cleans network timing directly from the incoming T1/E1 signal, eliminating dependency on external oscillators while preserving phase noise performance required for synchronous TDM systems.
Is the DS2155GN pin-compatible with other devices in the DS215x family?
Yes, the DS2155GN is pin- and software-compatible with the DS2156 series, including DS2156LN+. Both share identical 100-ball CSBGA packaging, matching ball assignments, and register-level programming models. This compatibility allows direct substitution in existing designs without PCB or firmware changes, provided the target application does not rely on DS2156-specific enhancements like extended E1 CAS detection.
What line interface impedances does the DS2155GN support?
The DS2155GN supports software-selectable termination impedances of 75Ω, 100Ω, and 120Ω for both T1 and E1 interfaces. These settings configure internal resistors to match common media types: 75Ω for coaxial cable (E1/G.703), 120Ω for twisted-pair (E1), and 100Ω for optimized T1 short-haul operation. Selection is performed via LIU control registers, enabling runtime reconfiguration without hardware modification.
Can the DS2155GN generate and detect bit errors for link validation?
Yes, the DS2155GN integrates a fully programmable BERT (Bit Error Rate Tester) generator and detector. It supports PRBS patterns (2^7–2^23), error injection, and real-time error counting - all accessible via its parallel control port. This on-chip capability allows engineers to validate physical layer integrity during system bring-up and field diagnostics without external test equipment, directly enhancing the utility of the DS2155GN in automated manufacturing and remote maintenance scenarios.
DS2155GN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 100-LFBGA, CSPBGA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Single-Chip Transceiver
- Interface:
- E1, HDLC, J1, T1
- Number of Circuits:
- 1
- Voltage - Supply:
- 3.14V ~ 3.47V
- Current - Supply:
- 75mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-CSBGA (10x10)
DS2155GN FAQ
1.How can I place an order for DS2155GN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2155GN 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 DS2155GN reliable?
The price and inventory of DS2155GN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2155GN is usually 5 days.
3.What payment methods are accepted for DS2155GN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2155GN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2155GN?
DS2155GN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2155GN 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 DS2155GN?
For technical support, including DS2155GN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2155GN requirements.
6.How does Aetrix verify that DS2155GN is sourced from the original manufacturer or authorized distributors?
All DS2155GN 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 DS2155GN meets industry standards.
7.What is the process for return or replacement of DS2155GN?
All DS2155GN units undergo pre-shipment inspection (PSI). If there is an issue with DS2155GN, 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 DS2155GN part is unused and in its original packaging.
Return procedure for DS2155GN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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