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Home > Products > Integrated Circuits (ICs) > Interface > Telecom

Analog Devices Inc./Maxim Integrated DS2141AQ/T&R

Name: DS2141AQ/T&R
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS2141AQ/T&R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS2141AQ/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Telecom

Package:: 44-LCC (J-Lead)

Datasheet:: DS2141AQ/T&R.pdf

Description:: IC TELECOM INTERFACE 44PLCC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

DS2141AQ/T&R from Maxim Integrated (now part of Analog Devices) is a software-configurable T1 framing transceiver IC designed as a slave/coprocesor to microcontrollers in telecom line cards. It supports D4, ESF, and SLC-96 framing formats; provides dual 2-frame elastic store buffers; extracts/inserts robbed-bit signaling; and operates from a single 5V supply. Used in ISDN-PRI access equipment and T1 channel banks for frame synchronization and FDL handling.

For engineers reviewing the DS2141AQ/T&R datasheet, DS2141AQ/T&R pinout, DS2141AQ/T&R application, or DS2141AQ/T&R equivalent, this page delivers verified technical context, exact pin functions, real-world timing roles, confirmed alternatives, and supply-ready procurement details - all grounded in the official DS2141A datasheet and Maxim's design documentation.

Technical Context

The DS2141AQ/T&R implements fully independent transmit and receive sections with parallel bus control (Intel/Motorola selectable), enabling multi-T1 line management by a single host MCU. Its receive side performs frame/multiframe sync acquisition per ANSI T1.403-1989 and CCITT G.704, with error-tolerant yellow/blue alarm detection and 1's density violation monitoring.

Transmit functionality includes programmable output clocks (TCHCLK, TLCLK, RCHCLK at 192 kHz; TCLK/RCLK at 1.544 MHz), payload loopback (PLB), local loopback (LLB), and FDL insertion - all configurable via six 8-bit control registers (RCR1/2, TCR1/2, CCR1/2) and supported by 62 accessible internal registers including status, error counters, and signaling registers.

Key Specifications

Parameter	Value and Actual Design Meaning
Framing Standards	D4, ESF, and SLC-96 - enables interoperability with legacy and modern T1 networks including AT&T TR 62411 and CCITT G.706 compliance.
Supply Voltage	5.0 V ±5% - single-supply operation simplifies power design in telecom line interface cards.
Primary Clock Rate	1.544 MHz (TCLK/RCLK) - matches T1 line rate for bit-synchronous framing and recovery.
Elastic Store	Dual 2-frame buffers - compensates for clock domain mismatches between line and system clocks without data loss.
Control Interface	8-bit multiplexed AD0–AD7 bus with BTS-selectable Intel/Motorola timing - reduces MCU pin count and supports common embedded processors.
Alarm Detection	Loss of Receive Clock (LORC), Loss of Transmit Clock (LOTC), Yellow/Blue Alarms - provides real-time fault signaling via INT1/INT2 open-drain outputs.
Robbed-Bit Handling	Full extraction and insertion across all 24 channels - essential for CAS-based voice trunking in ISDN-PRI and PBX systems.

Pinout & Package

DS2141AQ/T&R is supplied in a 40-pin plastic DIP (600-mil) package. Pin functions are validated per Maxim DS2141A datasheet Rev. 0, pages 3–5.

Pin/Terminal	Circuit Role	Design Meaning
TCLK	Transmit Clock Input	1.544 MHz master clock for transmit serial data timing; required for NRZ output on TPOS/TNEG.
TSER	Transmit Serial Data Input	Unframed T1 data input sampled on falling edge of TCLK; accepts payload before framing insertion.
RPOS/RNEG	Receive Bipolar Data Inputs	Differential inputs for T1 line signal; sampled on falling edge of RCLK; support NRZ mode when tied together.
AD0–AD7	Address/Data Bus	Multiplexed 8-bit bus for register access; latched by ALE(AS); supports both Intel and Motorola MCU interfaces.
INT1/INT2	Interrupt Outputs	Active-low open-drain alarms - INT1 reports RLOS, RYEL, RBL; INT2 reports RMF, SEC, RFDL, LORC.
RLINK/TLINK	Receive/Transmit Link Data	RLINK outputs FDL/Fs/Z-bits one RCLK before frame start; TLINK inputs FDL data during F-bit time if enabled.
RCHCLK/TCHCLK	Channel Clock Outputs	192 kHz clocks synchronized to LSB of each T1 channel - used for channelized UART/LAPD timing and robbed-bit location.

Key Features

Feature	Design Value
Software-Configurable Framing	Runtime selection of D4/ESF/SLC-96 modes via CCR2.7/RFM/TFM bits - eliminates hardware redesign for spec updates.
Programmable Elastic Store	Independent enable/disable of transmit/receive 2-frame buffers (CCR1.7/RESE) - mitigates jitter and slip in mixed-clock environments.
FDL Support Circuitry	Integrated FDL match detection (RMTCH), abort recognition (RAF), and buffer management (RFDL/TFDL) - offloads line interface controller tasks.
Comprehensive Alarm Monitoring	Hardware detection of RLOS, LOTC, LORC, RYEL, RBL, SLIP, and loop-up/down codes - enables rapid fault isolation without host polling overhead.
Loopback Modes	Local (LLB) and Payload (PLB) loopbacks controlled by CCR1.0/CCR1.1 - supports in-system validation of framer integrity and channel path continuity.

Applications

ISDN-PRI Access Gateway	T1 Channel Bank
Use Scenario: Aggregating 23 B-channels + 1 D-channel from multiple PRI lines into a centralized VoIP switch. IC Role / Device Role / Timing Role: DS2141AQ/T&R acts as the T1 framer coprocessor, extracting robbed-bit signaling from B-channels and inserting D-channel data into ESF frames while maintaining strict T1 timing alignment. Use Value: Enables deterministic CAS signaling handling and FDL-compliant trunk interfacing without requiring custom ASIC logic or FPGA framing IP.	Use Scenario: Building modular T1 line cards supporting fractional T1 (e.g., 384 kbps) and full 1.544 Mbps services in carrier-class DSLAMs. IC Role / Device Role / Timing Role: DS2141AQ/T&R serves as the framing engine, using TCHBLK/RCHBLK to block unused channels and RCHCLK to synchronize channelized data converters. Use Value: Reduces MCU load via hardware-accelerated framing, elastic store buffering, and programmable channel blocking - critical for high-density line card scalability.
Remote Loopback Test System	T1 Jitter Attenuation Interface
Use Scenario: Field-deployable test unit verifying end-to-end T1 circuit integrity by initiating and monitoring loop-up/down codes per AT&T TR 62411. IC Role / Device Role / Timing Role: DS2141AQ/T&R detects repeating 00001…/001… patterns in real time (SR1.7/SR1.6) and asserts interrupts for automated response. Use Value: Eliminates need for external pattern generators or protocol analyzers - delivers standards-compliant loop code detection at line rate with <48 ms latency.	Use Scenario: Interfacing with DS2188 jitter attenuator in timing-critical backhaul links where T1 clock stability must meet GR-1244-CORE requirements. IC Role / Device Role / Timing Role: DS2141AQ/T&R supplies clean, framed T1 data to DS2188 via RPOS/RNEG while receiving regenerated RCLK - acting as jitter-sensitive front-end. Use Value: Provides precise frame-aligned data stream with low-jitter RCLK output, enabling DS2188 to perform effective clock cleanup without added phase noise.

ISDN-PRI Access Gateway

T1 Channel Bank

Use Scenario: Aggregating 23 B-channels + 1 D-channel from multiple PRI lines into a centralized VoIP switch.

IC Role / Device Role / Timing Role: DS2141AQ/T&R acts as the T1 framer coprocessor, extracting robbed-bit signaling from B-channels and inserting D-channel data into ESF frames while maintaining strict T1 timing alignment.

Use Value: Enables deterministic CAS signaling handling and FDL-compliant trunk interfacing without requiring custom ASIC logic or FPGA framing IP.

Use Scenario: Building modular T1 line cards supporting fractional T1 (e.g., 384 kbps) and full 1.544 Mbps services in carrier-class DSLAMs.

IC Role / Device Role / Timing Role: DS2141AQ/T&R serves as the framing engine, using TCHBLK/RCHBLK to block unused channels and RCHCLK to synchronize channelized data converters.

Use Value: Reduces MCU load via hardware-accelerated framing, elastic store buffering, and programmable channel blocking - critical for high-density line card scalability.

Remote Loopback Test System

T1 Jitter Attenuation Interface

Use Scenario: Field-deployable test unit verifying end-to-end T1 circuit integrity by initiating and monitoring loop-up/down codes per AT&T TR 62411.

IC Role / Device Role / Timing Role: DS2141AQ/T&R detects repeating 00001…/001… patterns in real time (SR1.7/SR1.6) and asserts interrupts for automated response.

Use Value: Eliminates need for external pattern generators or protocol analyzers - delivers standards-compliant loop code detection at line rate with <48 ms latency.

Use Scenario: Interfacing with DS2188 jitter attenuator in timing-critical backhaul links where T1 clock stability must meet GR-1244-CORE requirements.

IC Role / Device Role / Timing Role: DS2141AQ/T&R supplies clean, framed T1 data to DS2188 via RPOS/RNEG while receiving regenerated RCLK - acting as jitter-sensitive front-end.

Use Value: Provides precise frame-aligned data stream with low-jitter RCLK output, enabling DS2188 to perform effective clock cleanup without added phase noise.

Equivalent & Alternatives

The following parts are listed as comparable options for similar T1 framing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS2142Q	Pin-compatible upgrade with enhanced ESF CRC6 verification, improved BPV counting, and extended register set - requires firmware update for full feature use.	Supports higher ESF error detection fidelity and deeper diagnostics but retains identical D4/SLC-96 behavior and pinout.	Preferred for new designs requiring stricter ESF conformance; drop-in replacement only if legacy DS2141A register map compatibility is maintained.
MC145508P	CMOS T1 framer with D4/ESF support but no elastic store, no SLC-96, and no programmable output clocks - fixed-function architecture.	Limited to basic framing without channel blocking, FDL handling, or loopback modes; lacks interrupt-driven alarm reporting.	Suitable for cost-sensitive, low-feature T1 termination where elastic store and advanced signaling are unnecessary.

Compared with DS2141AQ/T&R, DS2142Q adds diagnostic depth and ESF robustness while preserving pinout and core functionality, whereas MC145508P offers basic framing at lower complexity but sacrifices configurability, timing flexibility, and telecom-grade alarm handling.

Availability

DS2141AQ/T&R is available at Aetrix Electronics and suitable for ISDN-PRI gateways, T1 channel banks, and remote loopback test systems requiring stable component supply, long-lifecycle support, and traceable sourcing for telecom infrastructure deployments.

Supply support for DS2141AQ/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

Maxim Integrated (acquired by Analog Devices in 2021) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for communications, computing, and industrial markets.

The DS2141AQ/T&R belongs to Maxim's T1/E1 line interface product line, engineered specifically for carrier-grade T1 framing, synchronization, and signaling in access network equipment - emphasizing configurability, standards compliance, and MCU offload.

FAQ

What is the primary function of the DS2141AQ/T&R in a T1 system?

The DS2141AQ/T&R serves as a software-configurable T1 framing transceiver that synchronizes, frames, and processes T1 data streams. It handles D4, ESF, and SLC-96 framing formats; extracts and inserts robbed-bit signaling; manages FDL; and interfaces with line drivers via its serial port (LI_SDI/LI_CLK/LI_CS). In system design, the DS2141AQ/T&R acts as a coprocessor to offload framing tasks from the host MCU - enabling efficient multi-line T1 management in ISDN-PRI and channel bank applications.

Does the DS2141AQ/T&R support both Intel and Motorola microprocessor bus timing?

Yes, the DS2141AQ/T&R supports both Intel- and Motorola-style parallel bus timing through the BTS pin. When BTS is strapped low, the device uses Intel timing (RD = DS, WR = R/W, ALE = AS); when high, it uses Motorola timing (RD = DS, WR = R/W, ALE = AS). This dual-mode capability allows seamless integration with common 8-bit and 16-bit microcontrollers without external glue logic - a key design feature confirmed in the DS2141A datasheet Section 2.0 and Pin Description Table 1.

How does the elastic store in the DS2141AQ/T&R improve system reliability?

The DS2141AQ/T&R incorporates dual independent 2-frame elastic stores - one for receive (RESE) and one for transmit (TESE) - controllable via CCR1.2 and CCR1.7. These buffers absorb clock domain variations between line and system clocks, preventing data loss during minor frequency mismatches. When enabled, they allow frame repeat/delete operations signaled via RIR.4/RIR.3 and SR1.4, providing jitter tolerance essential for stable T1 operation in noisy or temperature-varying environments - directly improving link uptime and reducing slip-related errors.

Can the DS2141AQ/T&R generate valid T1 alarms such as Yellow and Blue Alarms?

Yes, the DS2141AQ/T&R natively detects and reports Yellow Alarm (RYEL), Blue Alarm (RBL), Loss of Receive Clock (LORC), and Loss of Transmit Clock (LOTC) per ANSI T1.403-1989. These conditions trigger corresponding bits in Status Register 1 (SR1) and can assert active-low interrupts on INT1 or INT2 pins based on mask settings in IMR1/IMR2. The DS2141AQ/T&R also supports transmit-side Yellow Alarm (TYEL) and Blue Alarm (TBL) generation - making it fully compliant for alarm injection and monitoring in carrier-class T1 line interface designs.

What packaging and ordering options are available for the DS2141AQ/T&R?

The DS2141AQ/T&R is supplied in a 40-pin plastic DIP (600-mil) package, tape-and-reel format (T&R), with lead-free and RoHS-compliant construction. It is distinct from the DS2141Q variant, which uses a 44-pin PLCC package. The "Q" suffix denotes commercial temperature range (0°C to +70°C), and "/T&R" specifies tape-and-reel packaging - critical for automated PCB assembly. Full ordering details, including reel size and packaging dimensions, are documented in Maxim's official DS2141A datasheet and packaging specification sheets.

DS2141AQ/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:: -

Interface:: Parallel/Serial

Number of Circuits:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Supply:: 10mA

Power (Watts):: -

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 44-PLCC (16.59x16.59)

DS2141AQ/T&R FAQ

1.How can I place an order for DS2141AQ/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS2141AQ/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 DS2141AQ/T&R reliable?

The price and inventory of DS2141AQ/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 DS2141AQ/T&R is usually 5 days.

3.What payment methods are accepted for DS2141AQ/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2141AQ/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS2141AQ/T&R?

DS2141AQ/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS2141AQ/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 DS2141AQ/T&R?

For technical support, including DS2141AQ/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2141AQ/T&R requirements.

6.How does Aetrix verify that DS2141AQ/T&R is sourced from the original manufacturer or authorized distributors?

All DS2141AQ/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 DS2141AQ/T&R meets industry standards.

7.What is the process for return or replacement of DS2141AQ/T&R?

All DS2141AQ/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS2141AQ/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 DS2141AQ/T&R part is unused and in its original packaging.

Return procedure for DS2141AQ/T&R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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