Analog Devices Inc./Maxim Integrated DS2152L

Overview

DS2152L from Maxim Integrated is an enhanced T1 single-chip transceiver (SCT) for DS-1/ISDN-PRI line interface applications, integrating full framer, jitter attenuator, elastic store buffers, HDLC controller, and line driver/receiver functions. It supports D4, ESF, and SLC-96R framing, handles 0–6000 ft cable lengths, delivers -7.5dB/-15dB/-22.5dB CSU/DSX-1 line build-outs, and operates from a 5V supply in a 100-pin LQFP package.

For engineers reviewing the DS2152L datasheet, DS2152L pinout, DS2152L application, or DS2152L equivalent, key selection considerations include T1 framer compatibility with ANSI T1.403-1995 and ITU G.703/G.704, crystal-less 32-/128-bit jitter attenuation, dual elastic store support for asynchronous backplanes up to 8.192MHz, and hardware-based robbed-bit signaling extraction/insertion.

Technical Context

The DS2152L implements a fully independent transmit and receive data path with separate clock domains, enabling simultaneous operation on long-haul and short-haul T1 lines. Its framer detects and generates RAI (yellow), AIS (blue), RLOS, and RCL alarms while supporting D4 superframe, ESF extended superframe, and SLC-96R formats with CRC6 validation per Japanese standard.

It integrates a programmable 8-bit parallel control port compatible with Intel- and Motorola-style buses (multiplexed or nonmultiplexed), an integral HDLC controller with 16-byte FDL buffers, and a pulse density enforcer compliant with ANSI ones-density requirements. The line interface decouples analog front-end operation from digital framing, allowing direct connection to optical, HDSL, or NRZ interfaces.

Key Specifications

Pinout & Package

DS2152L is housed in a 100-pin LQFP (14mm × 14mm) package with exposed thermal pad. Pin assignments are validated per Maxim's official DS2152 datasheet Rev 011706, including dedicated analog receive/transmit terminals, parallel control bus, elastic store clocks, and alarm/status outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS2152L, DS2154 offers E1 compatibility but no T1 support or crystal-less jitter attenuation, while MC145508 requires external analog and buffering components-making DS2152L the only single-chip solution delivering full T1 transceiver functionality with integrated line interface, elastic store, and programmable build-out in a 100-pin LQFP.

Availability

DS2152L is available at Aetrix Electronics and suitable for T1 channel banks, ISDN-PRI access gateways, CSU/DSU equipment, and telecom network monitoring taps requiring stable component supply across industrial temperature ranges (0°C to +70°C).

Supply support for DS2152L 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 (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for communications, computing, and industrial applications.

The DS2152L belongs to Maxim's T1/E1 transceiver product line, designed specifically for single-chip termination of DS-1 and ISDN-PRI lines in carrier-class access equipment, with emphasis on integration, standards compliance, and field-replaceable reliability.

FAQ

What is the operating temperature range for the DS2152L?

The DS2152L is specified for commercial temperature operation from 0°C to +70°C. This range aligns with standard telecom line card environments where ambient heat dissipation is managed via chassis airflow and board-level thermal design. The DS2152L+ variant offers identical electrical performance with lead-free/RoHS-compliant packaging, and the DS2152LN extends operation to -40°C to +85°C for extended-temperature applications.

Does the DS2152L support both D4 and ESF framing formats?

Yes, the DS2152L natively supports D4 (12-frame superframe), ESF (24-frame extended superframe), and SLC-96R framing formats. Its framer automatically locates frame and multiframe boundaries, validates CRC6 per ITU G.706 and Japanese standards, and extracts/inserts robbed-bit signaling in both formats-enabling interoperability across legacy and modern T1 networks without firmware changes.

How does the crystal-less jitter attenuator in the DS2152L function?

The DS2152L's crystal-less jitter attenuator uses a digitally controlled delay-line architecture to filter incoming jitter without requiring an external crystal oscillator. It is configurable for 32-bit or 128-bit depth and can be placed in either the transmit or receive data path. This feature simplifies board layout, reduces BOM cost, and maintains jitter tolerance compliance per ITU G.823 across varying line conditions.

Can the DS2152L interface directly with an FPGA or DSP without external glue logic?

Yes, the DS2152L's 8-bit parallel control port supports both Intel- and Motorola-style bus timing and operates in multiplexed or nonmultiplexed mode. Its interrupt output (INT), elastic store sync signals (RSYNC/TSYNC), and channel clocks (RCHCLK/TCHCLK) provide deterministic handshaking with FPGAs or DSPs-enabling direct connection to Xilinx Zynq or TI C6000-series devices without address latches or bus transceivers.

What line build-out options does the DS2152L support?

The DS2152L supports programmable line build-out levels of -7.5dB, -15dB, and -22.5dB for both CSU (long-haul) and DSX-1 (short-haul) configurations. These settings are controlled via the Line Interface Control Register (LICR) and implemented using internal current sources and resistive networks-eliminating need for external passive components while ensuring compliance with AT&T TR-62411 and ANSI T1.231 specifications.