Analog Devices Inc./Maxim Integrated MAX72463B+

Overview

MAX72463B+ from Maxim Integrated is an 8-channel SAS/SATA signal conditioner IC designed for high-speed serial link conditioning in storage interconnects. It supports 1.5Gbps/3Gbps/6Gbps signaling, features adaptive DFE receivers, low-jitter CDR, and programmable transmitter output (400–1600mV amplitude, 0–9dB deemphasis), enabling reliable 6Gbps operation over lossy FR4 or long copper cables in RAID enclosures and cable I/O cards.

For engineers reviewing the MAX72463B+ datasheet, MAX72463B+ pinout, MAX72463B+ application, or MAX72463B+ equivalent, key selection considerations include its FCCSP-196 package compatibility, I²C/UART configurability, real-time eye monitoring capability, OOB forwarding compliance with SAS 2.1, and support for optical SAS interfaces.

Technical Context

The MAX72463B+ implements eight independent PHYs-each with a decision-feedback equalizer (DFE) receiver, spread-spectrum clock-compatible CDR, and fully configurable transmitter. It processes SAS and SATA training sequences to auto-tune transmit settings including amplitude, deemphasis, slew rate, and zero crossing.

It integrates eye mapping and real-time eye monitoring for channel health assessment, plus 10 GPIOs and interrupt output for system-level control. Optical SAS support per SAS 2.1 specification is implemented via register configuration and external oscillator selection.

Key Specifications

Pinout & Package

FCCSP-196 (Fine-Pitch Chip Scale Package) with 196 solder balls arranged in a 15mm × 15mm array and 1mm ball pitch. Thermal and electrical performance optimized for high-speed serial interface placement on dense PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SAS/SATA signal conditioning applications.

Compared with MAX72463B+, MAX72462B+ offers identical signal conditioning quality in a reduced lane count, while DS100BR210 trades configurability and SAS protocol awareness for smaller footprint and lower power-making it suitable only for basic retiming, not full SAS ecosystem integration.

Availability

MAX72463B+ is available at Aetrix Electronics and suitable for RAID enclosures, cable I/O cards, and legacy backplane upgrades requiring stable component supply and long-term industrial availability.

Supply support for MAX72463B+ 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 high-speed interface ICs for industrial, communications, and computing applications.

The MAX72463B+ belongs to Maxim's high-speed serial signal conditioning product line, engineered specifically to extend SAS and SATA reach in storage subsystems where channel loss and jitter limit native 6Gbps performance.

FAQ

What is the primary function of the MAX72463B+ in a SAS/SATA system?

The MAX72463B+ functions as an adaptive signal conditioner that restores signal integrity in 6Gbps SAS and SATA links. It mitigates intersymbol interference and jitter using DFE receivers and low-jitter CDR, while dynamically tuning transmitter parameters during link training. The MAX72463B+ ensures reliable operation over lossy FR4 traces or long copper cables where native PHYs would fail to maintain bit error rates below 1e-12.

Does the MAX72463B+ support optical SAS interfaces?

Yes, the MAX72463B+ supports optical SAS per SAS 2.1 specification when configured with appropriate register settings and a 150MHz reference clock. It handles OOB signaling, link training, and eye monitoring required for optical PHY layer compliance. The MAX72463B+ does not integrate laser drivers but provides the full electrical conditioning and protocol-aware control needed upstream of optical transceivers.

How many independent channels does the MAX72463B+ provide, and what is their configuration?

The MAX72463B+ provides eight independent high-speed serial channels, organized as four bidirectional SAS/SATA ports (each with TX/RX pair). Each channel includes a fully adaptive DFE receiver, low-jitter CDR, and programmable transmitter with amplitude, deemphasis, slew rate, and zero-crossing control. The MAX72463B+ allows per-channel configuration via I²C or UART, enabling asymmetric tuning across ports.

Is the MAX72463B+ pin-compatible with other members of the MAX72463 family?

Yes, the MAX72463B+ shares identical FCCSP-196 pinout and ball map with MAX72463B# and MAX72463B#W variants. All share the same 15mm × 15mm footprint, 1mm ball pitch, and identical power, I/O, and control terminal assignments. The MAX72463B+ differs only in screening and packaging grade-not in pin function or electrical interface-enabling drop-in replacement within the same family.

What configuration interfaces does the MAX72463B+ support, and how are they used in system design?

The MAX72463B+ supports I²C and UART for runtime configuration and status monitoring, plus boot-from-flash mode for autonomous initialization. I²C (SCL/SDA) enables integration with baseboard management controllers without additional firmware; UART allows debug access via standard serial tools. The MAX72463B+ also accepts configuration from external SPI flash memory at power-up, eliminating host processor dependency during link bring-up.