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Analog Devices Inc./Maxim Integrated DS2180AQN/T&R
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- Part No.:
- DS2180AQN/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
DS2180AQN/T&R.pdf
- Description:
- IC TELECOM INTERFACE 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:390
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Product details
Overview
DS2180AQN/T&R from Maxim Integrated (now Analog Devices) is a monolithic CMOS T1 transceiver IC implementing primary-rate (1.544 Mbps) DS1 line interface functionality. It supports both 12-frame D4 (193S) and 24-frame extended superframe (193E) framing, provides B7 stuffing and B8ZS zero-suppression modes, and operates across -40°C to +85°C for industrial telecom infrastructure applications.
For engineers reviewing the DS2180AQN/T&R datasheet, DS2180AQN/T&R pinout, DS2180AQN/T&R application, or DS2180AQN/T&R equivalent, key selection considerations include framing mode flexibility (193S/193E), dual zero-suppression support (B7/B8ZS), hardware vs. processor configuration modes, robbed-bit signaling configurability per DS0 channel, and integrated alarm monitoring with register-accessible status and counters.
Technical Context
The DS2180AQN/T&R integrates independent transmit framer/formatter and receive synchronizer blocks sharing a common control architecture. The transmit side generates framing bits, inserts robbed-bit signaling, applies zero suppression (B7 or B8ZS), and outputs multiframe/frame sync clocks (TMO, TFSYNC) and channel clock (TCHCLK). The receive side extracts frame/multiframe alignment from FT/FPS bits, recovers signaling data (RABCD), detects carrier loss (RCL), bipolar violations (RBV), and frame errors (RFER).
Configuration occurs via either serial processor interface (pins SDI/SDO/SCLK/CS/SPS) supporting 16 registers including RSR, CCR, TCR, RCR, and BVCR-or hardware mode where SPS = VSS reassigns pins 14–18 as hardwired selects for standalone operation without host MCU. Loopback (LPBK bit in CCR) enables internal transmit-to-receive data routing for diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 1.544 Mbps - matches T1 line rate; requires precise 1.544 MHz TCLK and RCLK inputs. |
| Framing Modes | 193S (D4, 12-frame) and 193E (ESF, 24-frame) - selectable via CCR.4; determines FT/FPS detection logic and signaling frame timing. |
| Zero Suppression | B7 stuffing and B8ZS - mutually exclusive modes controlled by CCR.1/CCR.2; ensures 1's density compliance without data corruption in clear-channel links. |
| Operating Temp | -40°C to +85°C - validated industrial temperature range; designated by 'N' suffix in DS2180AQN. |
| Supply Voltage | 5.0 V ±5% - single-supply CMOS operation; VDD = Pin 40, VSS = Pin 20. |
| Signaling Flexibility | Selectable 0/2/4/16-state robbed-bit - configured via TCR.4 and TTR registers; enables mixed voice/data DS0 channels on same T1 link. |
| Alarm Monitoring | Integrated RLOS, RCL, RFER, RBV, RYEL, RBL detection - reported in RSR register and asserted on dedicated output pins (e.g., RLOS = Pin 39). |
Pinout & Package
DS2180AQN/T&R is supplied in a 40-pin plastic DIP (600-mil) package, RoHS-compliant and rated for industrial temperature operation. Pin functions are fully defined for both processor and hardware modes, with multifunction pins (e.g., INT/SDI/SDO/SCLK/CS/SPS) reconfigured based on SPS logic level.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TCLK (Pin 3) | Transmit Clock Input | 1.544 MHz master clock driving transmit framing; falling edge samples TSER data and TABCD signaling. |
| RCLK (Pin 24) | Receive Clock Input | 1.544 MHz recovered clock; falling edge samples RPOS/RNEG bipolar inputs; used for all receive timing. |
| TPOS/TNEG (Pins 12/13) | Transmit Bipolar Outputs | Differential bipolar line drivers; updated on rising edge of TCLK; support AMI/B8ZS encoding. |
| RPOS/RNEG (Pins 34/35) | Receive Bipolar Inputs | Differential bipolar line receivers; sampled on falling edge of RCLK; enable bipolar violation detection (RBV). |
| INT (Pin 14) | Interrupt Output | Active-low open-drain alarm flag; asserts on unmasked RSR conditions (e.g., RLOS, RYEL) when SPS = VDD (processor mode). |
| SPS (Pin 19) | Serial Port Select | Mode selector: tied to VDD enables serial interface (SDI/SDO/SCLK/CS); tied to VSS configures hardware mode (pin 14–18 become static controls). |
| RLOS (Pin 39) | Loss-of-Sync Indicator | Open-drain output high during internal resync; low when frame/multiframe alignment is stable; directly reflects RSR.0 state. |
| RYEL (Pin 21) | Yellow Alarm Output | Open-drain output high when yellow alarm detected (RSR.5 set); format differs between 193S (S-bit or bit-2) and 193E (FF/00 pattern on FDL). |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Framing | Runtime-selectable 193S or 193E mode via CCR.4 - enables interoperability with legacy D4 and modern ESF networks without hardware change. |
| Per-Channel Transparency | TTR1–TTR3 registers allow individual DS0 channels to bypass robbed-bit insertion and B7 stuffing - essential for ISDN and data-only applications requiring bit-transparent transport. |
| Hardware Mode Operation | SPS = VSS disables serial port and repurposes pins 14–18 as static controls - eliminates need for external MCU in fixed-function repeaters or channel banks. |
| Integrated Alarm Counters | BVCR (8-bit), ECR (dual 4-bit), and RSR saturation flags provide autonomous error logging - reduces host polling overhead and enables real-time link health assessment. |
| Loopback Diagnostics | LPBK bit (CCR.0) routes transmit data internally to receive path - allows full functional test of framer, synchronizer, and alarm logic without external loop cables or test equipment. |
Applications
| Channel Bank Interface | T1 Repeater Unit |
|---|---|
Use Scenario: Aggregating 24 analog voice lines into a single T1 trunk for connection to central office switching systems. IC Role / Device Role / Timing Role: DS2180AQN/T&R serves as the line interface transceiver, handling DS1 framing, zero suppression (B8ZS), robbed-bit signaling extraction/insertion, and alarm reporting. Use Value: Enables bit-accurate transport of voice channels with embedded ABCD signaling while meeting Telcordia GR-499-CORE jitter and error performance requirements. | Use Scenario: Regenerating degraded T1 signals over long copper spans in outside plant cabinets. IC Role / Device Role / Timing Role: DS2180AQN/T&R acts as a repeater transceiver, recovering timing from incoming RCLK, detecting RLOS/RCL, and retransmitting framed data with regenerated TCLK and TPOS/TNEG outputs. Use Value: Provides deterministic resync behavior (via RCR.0–RCR.3), carrier loss detection (RCL), and bipolar violation monitoring (RBV) critical for maintaining SLA-compliant uptime. |
| ISDN PRI Terminal Adapter | Network Element Management Agent |
Use Scenario: Supporting 23B+D ISDN Primary Rate Interface in enterprise PBX or media gateway hardware. IC Role / Device Role / Timing Role: DS2180AQN/T&R delivers transparent DS0 transport for B-channels (via TTR masking) and robust D-channel framing with 193E support and CRC validation. Use Value: Eliminates need for external transparency logic; B8ZS mode maintains 1's density on data channels without corrupting HDLC frames on the D-channel. | Use Scenario: Embedded telemetry in remote DSLAM or ONU units requiring real-time T1 link health reporting. IC Role / Device Role / Timing Role: DS2180AQN/T&R functions as a managed line monitor, using RSR, BVCR, and ECR registers to log errored superframes, bipolar violations, and yellow alarms for SNMP trap generation. Use Value: Reduces firmware complexity by offloading alarm counting and saturation detection to hardware, enabling low-overhead periodic register reads instead of continuous interrupt servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2180AN/T&R | Identical electrical and functional specification; differs only in packaging - DS2180AN uses 40-pin SOIC, while DS2180AQN uses 40-pin DIP. | SOIC package enables higher board density and automated assembly; DIP supports through-hole prototyping and legacy backplane designs. | Select DS2180AN/T&R for surface-mount production; retain DS2180AQN/T&R for hand-soldered evaluation or field-replaceable modules requiring DIP footprint. |
| DS2181A | Successor device with identical pinout and register map; adds enhanced CRC handling, improved jitter tolerance, and extended diagnostic registers (e.g., RMR for receive code insertion). | Supports newer ESF network deployments requiring stricter CRC validation and digital milliwatt insertion; backward-compatible for drop-in replacement where enhanced features are unused. | Choose DS2181A for new designs targeting long-term availability and enhanced diagnostics; DS2180AQN/T&R remains valid for cost-sensitive or legacy-maintenance programs. |
Compared with DS2180AN/T&R, the DS2180AQN/T&R offers identical signal integrity and timing performance but in a through-hole DIP package suited for manual assembly and thermal cycling resilience. Against DS2181A, it lacks advanced CRC validation and receive mark insertion - making it optimal for established D4 networks where those features add no value.
Availability
DS2180AQN/T&R is available at Aetrix Electronics and suitable for T1 channel banks, repeater units, ISDN PRI adapters, and network element management agents requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for DS2180AQN/T&R 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
Analog Devices (acquired Maxim Integrated in 2021) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving communications, industrial, and automotive markets with precision timing and interface solutions.
The DS2180AQN/T&R belongs to Maxim's legacy T-carrier transceiver family, engineered specifically for carrier-grade T1/E1 line interface applications demanding robust framing, zero-suppression, and alarm monitoring in harsh environmental conditions.
FAQ
What is the operating temperature range specified for the DS2180AQN/T&R?
The DS2180AQN/T&R is rated for industrial operation from -40°C to +85°C. This temperature grade is confirmed by the 'N' suffix in the part number and validated per Maxim's qualification testing. The device maintains full electrical performance-including timing accuracy, alarm threshold stability, and B8ZS encoding fidelity-across this entire range, making it suitable for outside plant and uncontrolled environment deployments where thermal stress is a concern. DS2180AQN/T&R must not be substituted with commercial-grade variants (e.g., DS2180AQ) in such applications.
Does the DS2180AQN/T&R support both D4 and ESF framing formats?
Yes, the DS2180AQN/T&R natively supports both 12-frame D4 (193S) and 24-frame extended superframe (193E) framing. Selection is controlled by bit CCR.4 in the Common Control Register: logic 0 configures 193S mode with FT/FS detection and 6/12 signaling frames, while logic 1 enables 193E mode with FPS/CRC validation and 6/12/18/24 signaling frames. The DS2180AQN/T&R automatically adapts its receive synchronizer algorithm, signaling clock (RSIGSEL), and alarm generation (RYEL format) based on this setting-no external logic or firmware changes are required to switch between standards.
How does hardware mode differ from processor mode on the DS2180AQN/T&R?
In hardware mode (SPS = VSS), the DS2180AQN/T&R disables its serial interface and reconfigures pins 14–18 as static control inputs-eliminating dependency on an external microcontroller. In processor mode (SPS = VDD), those same pins become SDI/SDO/SCLK/CS/SPS for configuring registers like CCR, TCR, and RCR via SPI-like protocol. DS2180AQN/T&R retains full functionality in both modes, but hardware mode sacrifices dynamic reconfiguration (e.g., runtime framing changes) for simplicity and reduced BOM count in fixed-function applications like repeaters or channel service units.
Can the DS2180AQN/T&R handle mixed clear and non-clear DS0 channels on the same T1 link?
Yes, the DS2180AQN/T&R explicitly supports mixed DS0 channel types via Transmit Transparency Registers (TTR1–TTR3). Setting a bit in these registers disables robbed-bit signaling and B7 stuffing for the corresponding DS0 channel, enabling bit-transparent transport required for ISDN B-channels or leased-line data services. This capability is documented in the DS2180A datasheet Section "TRANSMIT CHANNEL TRANSPARENCY" and verified in functional testing-allowing a single DS2180AQN/T&R to simultaneously carry voice (with ABCD signaling) and data (with zero-suppression disabled) on the same DS1 frame.
What alarm conditions does the DS2180AQN/T&R detect and report?
The DS2180AQN/T&R detects and reports six core alarm conditions: Receive Loss of Sync (RLOS), Receive Carrier Loss (RCL), Receive Frame Error (RFER), Receive Bipolar Violation (RBV), Receive Yellow Alarm (RYEL), and Receive Blue Alarm (RBL). Each condition is latched in the Receive Status Register (RSR) and optionally drives a dedicated open-drain output pin (e.g., RLOS = Pin 39). Alarm events can trigger masked interrupts (via RIMR) or increment onboard counters (BVCR, ECR), enabling flexible monitoring strategies-from immediate host response to statistical link health analysis-without compromising real-time T1 data throughput.
DS2180AQN/T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Transceiver
- Interface:
- T1
- Number of Circuits:
- 1
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply:
- 3mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
DS2180AQN/T&R FAQ
1.How can I place an order for DS2180AQN/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2180AQN/T&R 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 DS2180AQN/T&R reliable?
The price and inventory of DS2180AQN/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2180AQN/T&R is usually 5 days.
3.What payment methods are accepted for DS2180AQN/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2180AQN/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2180AQN/T&R?
DS2180AQN/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2180AQN/T&R 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 DS2180AQN/T&R?
For technical support, including DS2180AQN/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2180AQN/T&R requirements.
6.How does Aetrix verify that DS2180AQN/T&R is sourced from the original manufacturer or authorized distributors?
All DS2180AQN/T&R 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 DS2180AQN/T&R meets industry standards.
7.What is the process for return or replacement of DS2180AQN/T&R?
All DS2180AQN/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS2180AQN/T&R, 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 DS2180AQN/T&R part is unused and in its original packaging.
Return procedure for DS2180AQN/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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