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Analog Devices Inc./Maxim Integrated DS2180AN
- Part No.:
- DS2180AN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
DS2180AN.pdf
- Description:
- IC TELECOM INTERFACE 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:899
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Product details
Overview
DS2180AN from Maxim Integrated (now Analog Devices) is a monolithic CMOS T1 transceiver IC implementing primary-rate (1.544 MHz) 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, operates from a single 5V supply, and functions across the industrial temperature range of –40°C to +85°C - specifically designated by the 'AN' suffix. It serves as the core line interface in T1 channel banks, CSU/DSU units, and multiplexers.
For engineers reviewing the DS2180AN datasheet, DS2180AN pinout, DS2180AN application, or DS2180AN equivalent, this page delivers verified technical context on framing flexibility, zero-suppression selection, hardware vs. processor configuration modes, alarm reporting architecture, and register-level control of signaling and transparency per DS0 channel - all critical for T1 system integration and compliance validation.
Technical Context
The DS2180AN integrates independent transmit framer/formatter and receive synchronizer blocks sharing a unified control block. Its transmit side generates framing bits, inserts robbed-bit signaling (0/2/4/16-state), applies B7 or B8ZS zero suppression, and outputs TMSYNC/TFSYNC/TCHCLK/TSIGSEL clocks. The receive side extracts frame/multiframe alignment, reports RLOS/RCL/RFER/RBV/RYEL alarms, and provides RFSYNC/RMSYNC/RCHCLK clocks with configurable sync criteria and auto-resync behavior.
Configuration occurs via two mutually exclusive modes: processor mode uses pins 14–18 as a microcontroller-compatible serial port (SDI/SDO/SCLK/CS/SPS) for full register access (16 registers including RSR, CCR, TCR, RCR); hardware mode repurposes those pins as hard-wired selects, disabling programmable features like per-channel transparency or idle insertion but eliminating external host dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Line Rate | 1.544 MHz DS1 T-carrier rate - defines timing for all internal clock domains and data sampling. |
| Framing Standards | 193S (D4, 12-frame superframe) and 193E (ESF, 24-frame superframe) - selectable via CCR.4; determines F-bit structure, signaling frame positions, and CRC usage. |
| Zero Suppression | B7 stuffing and B8ZS - mutually exclusive modes controlled by CCR.1/CCR.2; ensures 1's density without data corruption in clear-channel applications. |
| Signaling Support | Selectable 0/2/4/16-state robbed-bit signaling - enables mixed voice/data operation; ABCD bits sampled at TABCD during signaling frames (6/12 for 193S; 6/12/18/24 for 193E). |
| Operating Voltage | 5 V ±5% - powers all analog front-end and digital logic; compatible with legacy T1 system power rails. |
| Temperature Range | –40°C to +85°C - validated industrial-grade operation confirmed by 'AN' suffix; suitable for uncontrolled telco cabinet environments. |
| Alarm Reporting | Dedicated open-drain INT pin plus RSR register (RSR.0–RSR.7) - flags RLOS, RCL, RFER, RBV, RYEL, RBL, B8ZSD, BVCS/ECS saturation in real time or via interrupt masking. |
Pinout & Package
DS2180AN is housed in a 40-pin plastic dual in-line package (DIP), 600-mil width, with through-hole mounting. Pin functions are fully defined for both transmit and receive paths, serial interface, power, and test signals - no NC pins affect functional routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TMSYNC / TFSYNC | Transmit multiframe/frame sync input | Establishes or reinforces frame/multiframe boundaries; allows flexible timing source options (free-run, pulsed, or continuous). |
| TSER / RSER | Transmit/receive serial data I/O | NRZ data path at 1.544 MHz; TSER sampled on falling TCLK edge, RSER updated on rising RCLK edge. |
| TPOS / TNEG / RPOS / RNEG | Bipolar transmit outputs / receive inputs | Direct connection to line transformer; bipolar violation monitoring active on RPOS/RNEG; NRZ mode enabled via TCR.7. |
| INT / RLOS / RCL / RFER / RBV / RYEL | Alarm status outputs | Open-drain or push-pull indicators for loss of sync, carrier loss, frame errors, bipolar violations, and yellow alarm detection. |
| SDI / SDO / SCLK / CS / SPS | Serial port interface | Microcontroller-compatible SPI-like bus (LSB-first, burst-capable); SPS high = processor mode, low = hardware mode. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed clear/non-clear DS0 channels | Per-channel transparency (TTR1–TTR3) and idle insertion (TIR1–TIR3) allow simultaneous voice and data services on one DS1 link without external mux logic. |
| Configurable signaling modes | 0/2/4/16-state robbed-bit support enables compatibility with legacy PBX, modern ISDN PRI, and hybrid telephony systems. |
| Hardware-mode stand-alone operation | No external processor required - pins 14–18 become hard-wired selects, reducing BOM count and firmware dependency in fixed-function designs. |
| Comprehensive error monitoring | On-chip 8-bit bipolar violation counter (BVCR), dual 4-bit error counters (ECR), and saturation flags (BVCS/ECS) enable autonomous link performance logging without host polling overhead. |
| Flexible alarm response | RIMR register allows selective masking of eight distinct alarm conditions (RLOS, RCL, etc.), enabling prioritized interrupt handling in resource-constrained systems. |
Applications
| Channel Bank Interface | CSU/DSU Line Card |
|---|---|
|
Use Scenario: Aggregating 24 DS0 voice channels into a single DS1 T1 trunk for central office interconnection. IC Role / Device Role / Timing Role: DS2180AN acts as the physical layer transceiver, performing framing, zero suppression, robbed-bit signaling extraction/insertion, and alarm generation per ITU-T G.704 and ANSI T1.107. Use Value: Enables direct interface to analog line cards and digital switches using industry-standard 193S framing and B7 stuffing, eliminating need for discrete framing logic or external signaling processors. |
Use Scenario: Deploying customer-premises CSU/DSU equipment requiring robust T1 line monitoring and loopback diagnostics. IC Role / Device Role / Timing Role: DS2180AN serves as the line interface IC, providing carrier loss detection (RCL), loss of sync (RLOS), frame error (RFER), and internal loopback (LPBK bit) for field service verification. Use Value: Delivers real-time alarm reporting via dedicated pins and register flags, allowing rapid fault isolation and automated maintenance without external test gear. |
| Remote Terminal Multiplexer | T1 Network Monitoring Probe |
|
Use Scenario: Building compact remote terminal units that demultiplex DS1 into individual DS0s for distribution to analog phones or modems. IC Role / Device Role / Timing Role: DS2180AN performs receive synchronization, channel clock (RCHCLK) generation, and ABCD signaling extraction (RABCD) for per-channel call control. Use Value: Provides precise 192 kHz RCHCLK and frame-aligned RABCD output synchronized to incoming T1, enabling deterministic time-slot assignment and signaling decoding without jitter-sensitive PLLs. |
Use Scenario: Inserting passive T1 monitoring taps in carrier networks to capture and analyze framing integrity, error rates, and alarm propagation. IC Role / Device Role / Timing Role: DS2180AN operates in receive-only mode with RCLK sourced externally, capturing and counting bipolar violations (RBV), frame errors (RFER), and yellow alarms (RYEL) over extended periods. Use Value: On-chip BVCR and ECR counters log error events autonomously, supporting long-duration statistical analysis of line quality without host CPU intervention or memory buffering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2175 | Dedicated T1 elastic store with integrated FIFO; lacks framing, signaling, and zero-suppression logic - requires companion framer like DS2180A. | Used only when precise slip buffer management is needed between asynchronous clocks; not a standalone transceiver replacement. | Select DS2175 only when building custom elastic store solutions with external framing control; DS2180AN integrates full framer + receiver + transmitter. |
| DS2186 + DS2187 | Two-chip solution: DS2186 (transmit line interface) + DS2187 (receive line interface); neither includes framer logic or serial control - requires external framer/controller. | Suitable for designs needing separate transmit/receive analog conditioning with maximum flexibility in clock tree design. | Choose DS2186+DS2187 only when analog front-end isolation or independent biasing is required; DS2180AN reduces component count and simplifies layout with monolithic integration. |
Compared with DS2180AN, DS2175 offers no framing capability and cannot replace it directly, while DS2186+DS2187 require external framer logic and increase board area and signal routing complexity - DS2180AN delivers full DS1 transceiver functionality in a single 40-pin DIP with integrated control and diagnostics.
Availability
DS2180AN is available at Aetrix Electronics and suitable for T1 channel banks, CSU/DSU line cards, and remote terminal multiplexers requiring stable component supply, long-lifecycle support, and industrial-temperature operation.
Supply support for DS2180AN 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 (formerly Maxim Integrated) designs high-performance analog, mixed-signal, and digital signal processing ICs for communications, industrial, and automotive markets.
The DS2180AN belongs to Maxim's legacy T-carrier transceiver product line, engineered specifically for reliable, standards-compliant DS1 line interface implementation in telecom infrastructure equipment where interoperability, alarm fidelity, and framing flexibility are mandatory.
FAQ
What framing standards does the DS2180AN support?
The DS2180AN supports both 12-frame D4 superframe (193S) and 24-frame extended superframe (193E) formats, selected via the FM bit (CCR.4). In 193S mode, it handles FT/FS framing bits and 6/12 signaling frames; in 193E mode, it processes FPS/CRC and 6/12/18/24 signaling frames. DS2180AN implements all required timing, alarm, and signaling behaviors per ANSI T1.107 and ITU-T G.704 for both standards.
How does the DS2180AN handle zero suppression?
The DS2180AN supports B7 stuffing and B8ZS zero-suppression modes, controlled by CCR.1 and CCR.2 respectively. These modes are mutually exclusive - enabling both causes loss of signal (LOS). B7 forces bit-7 to 1 in all-zero DS0 channels; B8ZS replaces eight consecutive zeros with a defined code word. DS2180AN detects and reports B8ZS code words via RSR.2 and supports transparent mode for clear-channel data integrity.
What is the difference between processor mode and hardware mode on the DS2180AN?
In processor mode (SPS = VDD), pins 14–18 form a serial port (SDI/SDO/SCLK/CS/SPS) for full register read/write access to all 16 onboard registers. In hardware mode (SPS = VSS), those pins become hard-wired selects for basic configuration (framing, zero suppression, signaling), disabling advanced features like per-channel transparency or idle insertion. DS2180AN requires no external host in hardware mode, reducing system complexity for fixed-function deployments.
Can the DS2180AN operate in standalone mode without a microcontroller?
Yes - the DS2180AN supports hardware mode (SPS tied low), where pins 14–18 become static configuration inputs. This eliminates the need for a microcontroller, making DS2180AN suitable for simple CSU/DSU or channel bank designs with fixed framing, signaling, and zero-suppression settings. All alarm outputs (INT, RLOS, RCL, etc.) remain fully functional, enabling external monitoring without serial communication.
What alarm conditions does the DS2180AN detect and report?
The DS2180AN detects and reports seven key alarm conditions: Receive Loss of Sync (RLOS), Receive Carrier Loss (RCL), Receive Frame Error (RFER), Receive Bipolar Violation (RBV), Receive Yellow Alarm (RYEL), Receive Blue Alarm (RBL), and B8ZS Detection (B8ZSD). Each is flagged on dedicated output pins and registered in the RSR (Receive Status Register), with maskable interrupts via the RIMR register - ensuring DS2180AN meets telecom-grade fault monitoring requirements.
DS2180AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 40-PDIP
DS2180AN FAQ
1.How can I place an order for DS2180AN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2180AN 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 DS2180AN reliable?
The price and inventory of DS2180AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2180AN is usually 5 days.
3.What payment methods are accepted for DS2180AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2180AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2180AN?
DS2180AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2180AN 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 DS2180AN?
For technical support, including DS2180AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2180AN requirements.
6.How does Aetrix verify that DS2180AN is sourced from the original manufacturer or authorized distributors?
All DS2180AN 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 DS2180AN meets industry standards.
7.What is the process for return or replacement of DS2180AN?
All DS2180AN units undergo pre-shipment inspection (PSI). If there is an issue with DS2180AN, 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 DS2180AN part is unused and in its original packaging.
Return procedure for DS2180AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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