Analog Devices Inc./Maxim Integrated DS3152+

Overview

DS3152+ from Maxim Integrated (now Analog Devices) is a dual-channel line interface unit (LIU) for DS3 (44.736 Mbps), E3 (34.368 Mbps), and STS-1 (51.840 Mbps) physical-layer interfacing. It integrates independent receive/transmit paths per channel, on-chip jitter attenuation, B3ZS/HDB3 encoding/decoding, and supports 75Ω coaxial cable up to 380m (DS3), 440m (E3), or 360m (STS-1). It is used in SONET/SDH multiplexers and digital cross-connect systems.

For engineers reviewing the DS3152+ datasheet, DS3152+ pinout, DS3152+ application, or DS3152+ equivalent, key selection considerations include dual-port DS3/E3/STS-1 compliance, hardware/CPU bus configuration modes, jitter attenuator path placement flexibility, tri-state output support for protection switching, and industrial temperature operation (–40°C to +85°C).

Technical Context

The DS3152+ implements two fully independent LIU channels, each with adaptive equalization (0–15 dB loss compensation), digital/analog LOS detection per ANSI T1.231 and ITU G.775, and programmable B3ZS/HDB3 encode/decode. Each receiver performs clock/data recovery from AMI-coded signals and outputs recovered clock (RCLK) and data (RPOS/RDAT, RNEG/RLCV) with configurable edge alignment via RCINV.

Each transmitter accepts binary or bipolar input, performs waveform shaping, includes line build-out (LBO) control for DS3/STS-1, generates AIS (ANSI T1.107), and supports gapped clocks up to 51.84 MHz with ±20% duty cycle tolerance. Jitter attenuation can be placed exclusively in either the receive or transmit path-or disabled-via dedicated RJAn/TJAn pins.

Key Specifications

Pinout & Package

DS3152+ uses a 144-pin thermally enhanced CSBGA package (13 mm × 13 mm), optimized for high-density telecom line card layouts and thermal dissipation in fanless chassis.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS3152N+, the DS3152+ offers identical electrical and functional behavior but excludes extended temperature qualification - making it suitable for climate-controlled central office use. Against DS3182+, DS3152+ trades marginal jitter improvement for 2× port density and lower per-port BOM cost in multi-link systems.

Availability

DS3152+ is available at Aetrix Electronics and suitable for SONET multiplexers, digital cross-connect systems, and DSLAM line cards requiring stable component supply across multi-year telecom infrastructure deployments.

Supply support for DS3152+ 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, industrial, and computing markets.

The DS3152+ belongs to Maxim's DS315x LIU family, designed specifically for carrier-grade DS3/E3/STS-1 line termination in SONET/SDH, PDH, and broadband access infrastructure.

FAQ

What telecom standards does the DS3152+ comply with?

The DS3152+ complies with ANSI T1.102, T1.107, T1.231, and T1.404; ITU-T G.703, G.751, G.775, G.823, and G.824; ETSI ETS 300 686/687/EN 300 689; and Telcordia GR-253-CORE and GR-499-CORE. These cover physical layer signaling, AIS/LOS detection, jitter control, and SONET transport requirements - all verified per the device's published electrical characteristics and functional diagrams.

Does DS3152+ support both hardware and microprocessor-based configuration?

Yes, DS3152+ supports two mutually exclusive modes: hardware mode (configuration via pull-up/pull-down resistors on pins like HW, E3Mn, STSn) and CPU bus mode (8-bit parallel interface with A[5:0], D[7:0], RD/DS, WR/R/W, CS, ALE). The HW pin selects mode: high = hardware, low = CPU bus. Both modes retain critical pins like RST, HIZ, and T3MCLK/E3MCLK/STMCLK for system-level control.

How is jitter attenuation configured in DS3152+?

In DS3152+, jitter attenuation is configured per channel using dedicated RJAn (receiver) and TJAn (transmitter) pins. Only one path may be active at a time: if TJAn = 1, the jitter attenuator is placed in the transmit path regardless of RJAn state (TJA takes precedence). This prevents cascaded filtering and preserves phase alignment - a design requirement explicitly stated in the functional description and jitter transfer diagram (Figure 9-1).

What is the role of RMONn and ALOS in DS3152+ receiver operation?

RMONn enables the receiver preamplifier for flat-gain monitoring of attenuated signals (e.g., from DSX test jacks), while ALOS is an internal analog loss-of-signal indicator generated before AGC/equalization. Together, they provide dual-stage LOS detection: ALOS gives early analog warning, and digital LOS (RLOS) confirms sustained zero-run violations - satisfying both ANSI T1.231 and ITU G.775 requirements as documented in Table 13-D/E and Section 6.

Can DS3152+ generate and detect PRBS patterns for link validation?

Yes, DS3152+ integrates on-chip 2¹⁵–1 and 2²³–1 PRBS generators (transmit side) and detectors (receive side) per channel. These operate independently of framer interface mode (binary/bipolar) and support both DS3 and E3 rates. PRBS output is available on PRBSn pins, and detection status is accessible via status registers - enabling full physical-layer BER testing without external pattern generators.