Analog Devices Inc./Maxim Integrated DS3150Q+T&R

Overview

DS3150Q+T&R from Maxim Integrated is a 3.3V DS3/E3/STS-1 Line Interface Unit (LIU) performing full physical-layer interfacing for TDM telecom networks. It integrates receiver clock/data recovery, transmitter waveshaping, and configurable jitter attenuation - supporting B3ZS (DS3/STS-1) and HDB3 (E3) coding, 75Ω coaxial interface up to 440m (E3), and loss-of-signal detection per ANSI T1.231 and ITU G.775. Used in digital cross-connects and DSLAMs.

For engineers reviewing the DS3150Q+T&R datasheet, DS3150Q+T&R pinout, DS3150Q+T&R application, or DS3150Q+T&R equivalent, key selection criteria include DS3/E3/STS-1 line-rate support (44.736/34.368/51.840 Mbps), 28-pin PLCC package, 3.3V operation with 5V-tolerant I/O, jitter attenuator path flexibility (Rx/Tx), and compliance with GR-253-CORE, G.703, and T1.102.

Technical Context

The DS3150Q+T&R implements independent receive and transmit data paths with adaptive analog equalization (0–15dB cable loss compensation), dual-mode B3ZS/HDB3 encode/decode, and programmable jitter attenuation that can be placed exclusively in either the receive or transmit path - not both simultaneously. Its CDR block accepts master clock inputs at 44.736 MHz (DS3), 34.368 MHz (E3), or 51.840 MHz (STS-1), with fallback to internal oscillator or TCLK if MCLK is inactive.

It supports bipolar and NRZ framer interfaces via ZCSE-controlled mode selection, includes on-chip 2¹⁵−1 and 2²³−1 PRBS generation/detection per ITU O.151, and features line build-out (LBO) control, transmit driver monitor (DM), and tri-state line driver for protection switching - all while meeting waveform template requirements across DS3, E3, and STS-1 standards.

Key Specifications

Pinout & Package

DS3150Q+T&R is housed in a 28-pin PLCC package with gull-wing leads, designed for high-density PCB layouts and thermal reliability in telecom line cards. Pin functions are defined per Maxim's DS3150 datasheet Rev 071305, Section 2 (Pin Descriptions) and Section 4 (Pin Configurations).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar line interface unit applications.

Compared with DS3150Q+T&R, DS3150QN offers wider thermal margin without design change, while DS3150T adds diagnostic capability at the cost of package size and pin count - neither is pin-compatible replacement, but all three share identical functional architecture and register mapping.

Availability

DS3150Q+T&R is available at Aetrix Electronics and suitable for digital cross-connects, DSLAM line cards, and ATM edge routers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for telecom infrastructure programs.

Supply support for DS3150Q+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 (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for communications, computing, and industrial applications.

The DS3150Q+T&R belongs to Maxim's telecom line interface product line, engineered specifically for TDM physical-layer interfacing in SONET/SDH, PDH, and access network equipment - emphasizing standards compliance, jitter control, and cable-length adaptability.

FAQ

What is the operating voltage range for the DS3150Q+T&R?

The DS3150Q+T&R operates from a single 3.3 V ±5% supply. All digital I/O pins are 5V tolerant, enabling direct interfacing with legacy 5V logic without external level shifters. This simplifies system integration in mixed-voltage telecom platforms and reduces bill-of-materials complexity. The device draws up to 110 mA under maximum load, supporting efficient power delivery design in dense line-card layouts.

Does the DS3150Q+T&R support both DS3 and E3 standards simultaneously?

No - the DS3150Q+T&R supports DS3, E3, and STS-1 standards, but only one line rate is active at a time, determined by the master clock (MCLK) frequency: 44.736 MHz for DS3, 34.368 MHz for E3, or 51.840 MHz for STS-1. The internal circuitry auto-configures decode/encode behavior (B3ZS vs. HDB3), equalizer response, and jitter tolerance profile based on the selected clock. Configuration is hardware-driven, not software-programmable.

How does the jitter attenuator function in the DS3150Q+T&R?

The jitter attenuator in the DS3150Q+T&R is a configurable block that can be mapped exclusively into the receive path, exclusively into the transmit path, or disabled - it cannot operate in both paths simultaneously. When enabled in the transmit path, it uses MCLK as its clean reference to generate a low-jitter line clock, allowing TCLK to be jittery or gapped (≤8 UI). Its performance meets GR-253-CORE and G.823/G.824 jitter transfer requirements.

What package type is used for the DS3150Q+T&R?

The DS3150Q+T&R is supplied in a 28-pin Plastic Leaded Chip Carrier (PLCC) package, measuring 11.43 mm × 11.43 mm with 1.27 mm lead pitch. This surface-mount package supports automated assembly and provides robust thermal performance for telecom line-card applications. It is identical in footprint and pinout to the DS3150Q and DS3150QN variants, enabling drop-in substitution within the same temperature grade.

Can the DS3150Q+T&R perform PRBS testing?

Yes - the DS3150Q+T&R includes fully integrated 2¹⁵−1 and 2²³−1 pseudorandom bit sequence (PRBS) generator and detector circuitry compliant with ITU-T O.151. The PRBS generator is selectable via TDS0/TDS1 inputs; the detector runs continuously and reports bit errors on the PRBS pin (low = sync, pulsed high = error). This enables in-system physical-layer BER validation without external test equipment.