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Analog Devices Inc./Maxim Integrated DS2141AQN
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- Part No.:
- DS2141AQN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Telecom
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
DS2141AQN.pdf
- Description:
- IC TELECOM INTERFACE 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:227
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Product details
Overview
DS2141AQN from Maxim Integrated (formerly Dallas Semiconductor) is a T1 framing transceiver IC designed as a software-configurable slave framer for microcontroller-based 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. It serves in T1 channel banks, ISDN-PRI interface modules, and digital loop carrier systems.
For engineers reviewing the DS2141AQN datasheet, DS2141AQN pinout, DS2141AQN application, or DS2141AQN equivalent, this page delivers verified technical context, exact register-mapped functionality, real-world timing roles (e.g., RCHCLK at 192 kHz for channel alignment), and validated alternatives for T1 framer migration or second-source planning.
Technical Context
The DS2141AQN implements fully independent transmit and receive sections with parallel bus control (Intel/Motorola selectable via BTS pin), enabling multi-T1 line management by a single host MCU. Its receive side performs frame/multiframe synchronization, bipolar violation detection, yellow/blue alarm monitoring, and FDL extraction - all compliant with ANSI T1.403-1989, AT&T TR 62411, and CCITT G.704/G.706.
On transmit, it inserts framing bits (Ft/FPS), robbed-bit signaling, CRC6, and FDL data; supports B8ZS encoding/decoding; and offers programmable output clocks (TCHCLK, TLCLK, RCHCLK at 192 kHz; TCLK/RCLK at 1.544 MHz). Elastic store slip handling and payload/local loopback modes are register-controlled via CCR1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Framing Standards | D4, ESF, and SLC-96 - enables interoperability across legacy and modern T1 networks including ISDN-PRI trunking. |
| Data Rate | 1.544 Mbps - matches standard T1 line rate; requires precise 1.544 MHz TCLK/RCLK input. |
| Supply Voltage | 5.0 V ±5% - single-supply operation simplifies power design versus dual-rail alternatives. |
| Elastic Store | Dual 2-frame buffers - absorbs jitter and clock domain mismatches between line and system clocks without data loss. |
| Control Interface | 8-bit multiplexed address/data bus with Intel/Motorola timing - reduces MCU pin count and supports common embedded processors. |
| Alarm Detection | Loss of Sync (RLOS), Yellow/Blue Alarms, Loss of Clock (LOTC/LORC), and Severely Errored Framing - provides real-time line health monitoring via status registers and open-drain INT pins. |
| Robbed-Bit Handling | Full extraction and insertion - supports CAS signaling in voice channels without external logic. |
Pinout & Package
DS2141AQN is supplied in a 40-pin plastic DIP (600-mil) package. Pin functions are validated per official DS2141A datasheet Rev. 0, pages 3–5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TCLK | Transmit Clock Input | 1.544 MHz primary clock source for transmit section; timing reference for TSER sampling and framing bit generation. |
| RCLK | Receive Clock Input | 1.544 MHz primary clock for receive section; used to sample RPOS/RNEG and drive internal synchronizer. |
| TCHCLK / RCHCLK | Transmit/Receive Channel Clock Output | 192 kHz strobe aligned to LSB of each T1 channel; essential for parallel-to-serial conversion and robbed-bit timing. |
| AD0–AD7 | Multiplexed Address/Data Bus | Shared 8-bit path for register addressing and data transfer; reduces MCU interface footprint vs. separate buses. |
| BTS | Bus Timing Select | Strap high for Motorola timing (ALE/WR/RD), low for Intel timing (CS/WR/RD); enables drop-in compatibility with diverse host architectures. |
| INT1 / INT2 | Open-Drain Alarm Interrupt Outputs | Active-low flags for configurable alarm conditions (e.g., RLOS, SLIP, yellow alarm); support prioritized interrupt handling in MCU firmware. |
| RLINK / TLINK | Receive/Transmit Link Data I/O | Interface to line interface devices (e.g., DS2186/DS2187); carries FDL, Fs-bit, or Z-bit data synchronized to link clocks. |
| RSYNC / TSYNC | Frame/Multiframe Sync I/O | Programmable bidirectional sync pulse generator/detector; enables precise frame boundary alignment for external timing or loopback control. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Configurable Framing Mode | Register-selectable D4/ESF/SLC-96 operation allows field-upgradable T1 interface behavior without hardware change. |
| Programmable Output Clocks | TCHCLK, RCHCLK, TLCLK, and SYSCLK outputs provide synchronized timing for UARTs, LAPD controllers, and DDS circuits. |
| FDL Support Circuitry | Integrated FDL extraction/insertion logic eliminates need for external glue logic when interfacing with DS2186/DS2187 line interfaces. |
| Payload & Local Loopback Modes | CCR1.1/CCR1.0 enable diagnostic loopbacks - payload loopback verifies framing integrity; local loopback validates full signal path including line driver. |
| Large Error Counters | 16-bit BPV, CRC6, and frame error counters updated every second (SR2.5) support automated performance monitoring and SLA reporting. |
Applications
| T1 Channel Bank | ISDN-PRI Interface Module |
|---|---|
Use Scenario: Aggregating 24 voice channels over T1 lines in central office or remote terminal equipment. IC Role / Device Role / Timing Role: Primary T1 framer performing frame alignment, robbed-bit CAS extraction, and FDL processing; generates RCHCLK for channelized data routing. Use Value: Enables full compliance with ANSI T1.403 and AT&T TR 62411 while supporting both D4 and ESF network domains in one design. |
Use Scenario: Implementing PRI B-channel and D-channel framing in PBX or media gateway front-end. IC Role / Device Role / Timing Role: Slave framer controlled by host MCU to manage 23B+D structure; handles signaling bit insertion/extraction and multiframe sync via RSYNC/TSYNC. Use Value: Reduces BOM cost by integrating elastic store, alarm detection, and programmable clock generation - no discrete timing ICs required. |
| Digital Loop Carrier (DLC) Remote Terminal | T1 Network Monitoring Probe |
Use Scenario: Providing T1 termination and channel grooming in fiber-fed remote terminals serving multiple subscriber lines. IC Role / Device Role / Timing Role: Dual-framing engine supporting fractional T1 (e.g., 384 kbps) via TCHBLK/RCHBLK channel blocking; uses SYSCLK for elastic store jitter attenuation. Use Value: Allows dynamic channel allocation and drop-and-insert capability using register-controlled channel block signals - no FPGA logic needed. |
Use Scenario: Real-time T1 line analysis for bit error rate, BPV density, and framing stability in test equipment or NOC monitoring tools. IC Role / Device Role / Timing Role: Line-side framer capturing raw T1 stream; feeds error counters (BPVCR1/2, FECR) and status registers (SR1/SR2) to host for analytics. Use Value: Provides standardized, register-accessible performance metrics (e.g., 1-second BPV counts, SEC timer) for automated compliance reporting and fault isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar T1 framer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS2152 | Single-chip T1/E1 framer with integrated line interface drivers; supports E1 (2.048 Mbps) in addition to T1; uses 3.3V core supply. | Eliminates need for external line interface IC (e.g., DS2186); suitable for compact E1/T1 hybrid designs but requires voltage translation for 5V MCU interface. | Select DS2152 when consolidating framer + line interface and supporting E1 standards; verify 3.3V/5V level-shifting for control bus. |
| MC145508 | Legacy T1 framer with fixed D4-only framing; no ESF/SLC-96 support; lacks elastic store and programmable clocks; 44-pin PLCC only. | Limited to older D4 networks; no software reconfiguration; requires external circuitry for robbed-bit handling and alarm generation. | Choose MC145508 only for legacy D4-only replacements where ESF migration is not planned and board space permits larger PLCC footprint. |
Compared with DS2141AQN, DS2152 integrates line interface functions and adds E1 capability but demands 3.3V logic compatibility, whereas MC145508 offers pin-compatible D4-only operation at the cost of modern features like elastic store and multi-format framing - making DS2141AQN optimal for flexible, standards-evolving T1 deployments.
Availability
DS2141AQN is available at Aetrix Electronics and suitable for T1 channel banks, ISDN-PRI interface modules, and digital loop carrier remote terminals requiring stable component supply and long-term industrial availability.
Supply support for DS2141AQN 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) designs precision analog, mixed-signal, and high-reliability semiconductor solutions for communications, industrial, and automotive markets.
The DS2141AQN belongs to Maxim's legacy T1/E1 framer product line, engineered specifically for telecom infrastructure applications demanding ANSI/AT&T/CCITT-compliant framing, robust alarm handling, and MCU-friendly parallel control.
FAQ
What is the primary function of the DS2141AQN in a T1 system?
The DS2141AQN acts as a software-configurable T1 framing transceiver that synchronizes, frames, and monitors the 1.544 Mbps T1 serial stream. It performs frame alignment (D4/ESF/SLC-96), extracts and inserts robbed-bit signaling, manages FDL data, and reports line health via status registers and interrupt pins - all under host MCU control via its 8-bit parallel bus.
Does the DS2141AQN support both D4 and ESF framing formats?
Yes, the DS2141AQN supports D4, ESF, and SLC-96 framing formats. Frame mode is selected independently for transmit and receive sections via CCR2.7 (TFM) and CCR2.3 (RFM) registers. This allows mixed-mode operation - for example, receiving ESF while transmitting D4 - which is critical for network interworking scenarios.
How does the elastic store feature work in the DS2141AQN?
The DS2141AQN includes dual 2-frame elastic store buffers enabled via CCR1.7 (TESE) and CCR1.2 (RESE). When active, these buffers absorb clock domain differences between line and system clocks, preventing data loss during slips. Status bits RIR.4 (RESF) and RIR.3 (RESE) indicate buffer full/empty conditions, and SR1.4 (SLIP) flags slip events for firmware response.
Can the DS2141AQN generate multiple synchronized clock outputs?
Yes, the DS2141AQN provides several programmable clocks: TCHCLK and RCHCLK (192 kHz, aligned to T1 channel LSB), TLCLK (4 kHz or 2 kHz for FDL), and SYSCLK (1.544/2.048 MHz). These are generated internally and driven on dedicated pins, eliminating external clock dividers for channelized data routing and signaling timing.
What are the key differences between DS2141AQN and DS2152?
The DS2152 integrates line interface drivers and supports E1 (2.048 Mbps) in addition to T1, while DS2141AQN requires external line interface ICs (e.g., DS2186) and is T1-only. DS2152 uses a 3.3V core supply and has different pinout/control architecture; DS2141AQN retains 5V operation and Intel/Motorola bus flexibility - making them non-drop-in replacements.
DS2141AQN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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)
DS2141AQN FAQ
1.How can I place an order for DS2141AQN through Aetrix?
Please submit a Request for Quotation (RFQ) for DS2141AQN 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 DS2141AQN reliable?
The price and inventory of DS2141AQN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS2141AQN is usually 5 days.
3.What payment methods are accepted for DS2141AQN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS2141AQN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS2141AQN?
DS2141AQN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS2141AQN 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 DS2141AQN?
For technical support, including DS2141AQN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS2141AQN requirements.
6.How does Aetrix verify that DS2141AQN is sourced from the original manufacturer or authorized distributors?
All DS2141AQN 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 DS2141AQN meets industry standards.
7.What is the process for return or replacement of DS2141AQN?
All DS2141AQN units undergo pre-shipment inspection (PSI). If there is an issue with DS2141AQN, 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 DS2141AQN part is unused and in its original packaging.
Return procedure for DS2141AQN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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