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Analog Devices Inc./Maxim Integrated DS2180AQ
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- Part No.:
- DS2180AQ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
DS2180AQ.pdf
- Description:
- IC TELECOM INTERFACE 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
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Product details
Overview
DS2180AQ 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 - enabling deployment in carrier-grade TDM access equipment and legacy telecom infrastructure.
For engineers reviewing the DS2180AQ datasheet, DS2180AQ pinout, DS2180AQ application, or DS2180AQ equivalent, this page delivers verified technical context on framing flexibility, serial configuration interface operation, bipolar violation detection, alarm reporting architecture, and hardware/processor mode selection - all critical for T1 line card design, protocol compliance validation, and interoperability with DS2186/DS2187 line interfaces.
Technical Context
The DS2180AQ integrates independent transmit framer/formatter and receive synchronizer blocks sharing a unified control architecture. Its transmit side generates framing bits, inserts robbed-bit signaling (ABCD), applies B7 or B8ZS zero suppression, and outputs multiframe/frame sync clocks (TMO/TFSYNC); the receive side extracts frame/multiframe alignment (RMSYNC/RFSYNC), detects RLOS/RCL/BV/RFER alarms, and recovers signaling data (RABCD/RSIGFR) with configurable resync criteria (RCR.0–RCR.3).
Configuration occurs via a 5-pin SPI-compatible serial port (SDI/SDO/SCLK/CS/SPS) supporting 16 registers including RSR, CCR, TCR, RCR, and transparency/idle control registers (TTR/TIR/RMR). Hardware mode disables the serial port and repurposes pins 14–18 as hardwired selects, eliminating host processor dependency for fixed-function deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Single-chip T1 (DS1) transceiver IC for 1.544 Mbps line interface with full framing, signaling, and alarm handling |
| Framing Modes | 193S (D4, 12-frame superframe) and 193E (ESF, 24-frame superframe) - selectable via CCR.4 |
| Zero Suppression | B7 stuffing (CCR.1) and B8ZS (CCR.2) - mutually exclusive; enables compliance with T1 line density requirements |
| Supply Voltage | 5.0 V ±5% - compatible with legacy telecom power domains and eliminates need for level-shifting |
| Operating Temp | –40°C to +85°C - qualified for industrial and outdoor cabinet environments per DS2180AN/DS2180AQN variants |
| Interface Mode | Processor mode (SPI serial port) or hardware mode (pin-strapped configuration) - determines host dependency |
| Alarm Outputs | Dedicated open-drain INT (pin 14), RLOS/RCL/RBV/RFER/RYEL - enables real-time fault isolation without polling |
Pinout & Package
DS2180AQ is supplied in a 40-pin plastic dual in-line package (PDIP), 600-mil width, surface-mount compatible. Pin assignments match the DS2180A family and are validated per Maxim's official pinout documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TMSYNC / TFSYNC | Transmit multiframe/frame sync inputs | Establish and reinforce frame/multiframe timing boundaries; support free-run or externally pulsed synchronization |
| TCLK / RCLK | Transmit/receive primary clocks | 1.544 MHz system clock inputs driving all timing-critical operations on respective sides |
| TSER / RSER | Transmit serial input / receive serial output | NRZ data path: TSER sampled on falling TCLK edge; RSER updated on rising RCLK edge |
| TPOS / TNEG | Transmit bipolar data outputs | Differential bipolar output pair - updated on rising TCLK edge for AMI/HDB3 line coding |
| RPOS / RNEG | Receive bipolar data inputs | Differential inputs sampling on falling RCLK edge; tied together for NRZ mode with bipolar violation disabled |
| INT | Receive alarm interrupt output | Active-low open-drain signal asserting on any unmasked alarm condition (RLOS, RCL, RFER, etc.) |
| SDI / SDO / SCLK / CS / SPS | Serial port interface signals | SPI-compatible 5-wire bus for register read/write; SPS high = processor mode, low = hardware mode |
Key Features
| Feature | Design Value |
|---|---|
| Mixed clear/non-clear DS0 channels | Per-channel transparency (TTR) and idle insertion (TIR) enable simultaneous voice and data DS0s on one DS1 link |
| Configurable signaling modes | Selectable 0/2/4/16-state robbed-bit signaling (ABCD) with frame-specific sampling windows per 193S/193E |
| Comprehensive alarm monitoring | Hardware-asserted RLOS, RCL, RFER, RBV, RYEL, and RBL with saturation-counting registers (BVCR/ECR) |
| Two operational modes | Processor mode (full register control) or hardware mode (pin-strapped, no host required) - reduces BOM and firmware overhead |
| Interoperable line interface | Pin- and function-compatible with DS2186 (transmit LIU), DS2187 (receive LIU), and DS2188 (jitter attenuator) |
Applications
| Channel Bank Interface | T1 Line Card |
|---|---|
|
Use Scenario: Integrating legacy channel banks with modern digital switches using DS1 trunking. IC Role / Device Role / Timing Role: DS2180AQ acts as the line-side transceiver, framing incoming/outgoing DS0s into DS1, handling robbed-bit signaling extraction/insertion, and detecting yellow/blue alarms. Use Value: Eliminates discrete framing logic and external signaling processors; supports both D4 and ESF formats required by mixed-network deployments. |
Use Scenario: Building modular T1 interface cards for central office or remote terminal applications. IC Role / Device Role / Timing Role: Provides full physical layer transceiver functionality - clock recovery, frame alignment, error monitoring, and bipolar violation detection - with minimal external components. Use Value: Reduces component count vs. multi-chip solutions; industrial temp rating ensures reliability in uncontrolled cabinet environments. |
| Network Element Monitoring | Legacy PBX Integration |
|
Use Scenario: Embedding real-time T1 performance monitoring in network management gateways. IC Role / Device Role / Timing Role: DS2180AQ reports frame errors (FERR), bipolar violations (RBV), carrier loss (RCL), and errored superframes (ESF) via dedicated pins and counters (ECR/BVCR). Use Value: Enables autonomous link health assessment without continuous host polling - critical for remote diagnostics and SLA reporting. |
Use Scenario: Connecting analog/digital PBX systems to T1 carrier services requiring D4 framing and ABCD signaling. IC Role / Device Role / Timing Role: DS2180AQ terminates the T1 line, extracts channel-associated signaling (CAS), and presents RABCD data synchronized to RSIGFR/RSIGSEL clocks. Use Value: Preserves legacy PBX feature sets (e.g., wink start, E&M) while meeting modern T1 physical layer standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2180AN | Identical electrical and functional specification; differs only in temperature screening (–40°C to +85°C industrial grade) | Same use cases; selected when extended temperature qualification is required for outdoor or industrial enclosures | Choose DS2180AN for designs requiring full industrial temp validation; DS2180AQ is functionally identical but may lack extended test coverage |
| DS2180A | Same die and pinout; DS2180A is the base part number - DS2180AQ denotes surface-mount PDIP packaging variant | No functional difference; packaging choice driven by assembly process (through-hole vs. SMT) | Select DS2180A if through-hole DIP is preferred; DS2180AQ is the SMT-optimized version with identical timing and register behavior |
Compared with DS2180AN and DS2180A, the DS2180AQ offers identical transceiver functionality and register-level compatibility, differing solely in its surface-mount PDIP packaging and associated qualification scope - making it suitable for automated assembly while preserving full drop-in interoperability with other DS2180A-series variants in existing designs.
Availability
DS2180AQ is available at Aetrix Electronics and suitable for T1 line card development, channel bank integration, and telecom infrastructure upgrades requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for DS2180AQ 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 (via acquisition of Maxim Integrated) designs high-performance signal processing and interface ICs for communications, industrial, and automotive markets.
The DS2180AQ belongs to Maxim's legacy T-carrier transceiver product line, engineered specifically for robust, low-power DS1 implementation in carrier-class access equipment and legacy telecom systems.
FAQ
What framing standards does the DS2180AQ support?
The DS2180AQ supports both 12-frame D4 superframe (193S) and 24-frame extended superframe (193E) formats. Frame selection is controlled by bit CCR.4 in the Common Control Register. The device handles all associated signaling, zero suppression (B7/B8ZS), and alarm generation natively for either mode - no external logic is needed to switch between legacy and modern T1 networks.
How does the DS2180AQ handle robbed-bit signaling for mixed voice/data DS0 channels?
The DS2180AQ enables per-channel robbed-bit signaling control via Transmit Transparency Registers (TTR1–TTR3). When a bit is set in these registers, the corresponding DS0 channel bypasses robbed-bit insertion and bit-7 stuffing - preserving data integrity for ISDN or clear-channel applications. Signaling remains active on other channels, allowing hybrid voice/data DS1 links without external multiplexing.
Can the DS2180AQ operate without a host microcontroller?
Yes. The DS2180AQ supports hardware mode: tying SPS (pin 19) low configures pins 14–18 as hardwired select inputs, disabling the serial port. In this mode, features like framing format, zero suppression, and signaling mode are set statically via external pins - enabling standalone T1 interface operation in cost-sensitive or firmware-constrained designs.
What alarm conditions does the DS2180AQ detect and report?
The DS2180AQ detects and reports 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 with dedicated output pins and status bits in the Receive Status Register (RSR). Counters (BVCR, ECR) track occurrences, and interrupts can be individually masked via RIMR.
Is the DS2180AQ pin-compatible with other Maxim T1 transceivers?
Yes. The DS2180AQ shares pinout and register compatibility with the DS2180A and DS2180AN variants. It is also functionally interoperable with companion devices including the DS2186 (transmit LIU), DS2187 (receive LIU), and DS2188 (jitter attenuator), enabling modular T1 line interface designs where signal conditioning and framing are distributed across optimized ICs.
DS2180AQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
DS2180AQ FAQ
1.How can I place an order for DS2180AQ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2180AQ 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 DS2180AQ reliable?
The price and inventory of DS2180AQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2180AQ is usually 5 days.
3.What payment methods are accepted for DS2180AQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2180AQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2180AQ?
DS2180AQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2180AQ 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 DS2180AQ?
For technical support, including DS2180AQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2180AQ requirements.
6.How does Aetrix verify that DS2180AQ is sourced from the original manufacturer or authorized distributors?
All DS2180AQ 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 DS2180AQ meets industry standards.
7.What is the process for return or replacement of DS2180AQ?
All DS2180AQ units undergo pre-shipment inspection (PSI). If there is an issue with DS2180AQ, 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 DS2180AQ part is unused and in its original packaging.
Return procedure for DS2180AQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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