MAX4986

PRODUCTION

SAS/SATA Single Lane 2:1/1:2 Multiplexer/Demultiplexer Plus Redriver with Equalization

1:2/2:1 Active Mux with Redrive Maintains Signal Integrity While Providing High-Frequency Performance at SAS/SATA 2.0s

Data Sheet (Rev. 1) Product Selection Table

Part Models: 4
1ku List Price: Starting From $13.86

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Overview

Single +3.3V Supply Operation
Low-Power, 1mA (typ) Standby
- Active-High Enable (EN) for Use with Power Good
- Active-Low Enable (EN) for Cable-Detect Function
Supports SAS I/II/III ≤ 6.0Gbps
Independent Programmable Input Equalization Two Levels: 0dB, 4dB
Independent Programmable Output Preemphasis Two Levels: 0dB, 3dB
Independent Programmable Output Level Selection
Supports SAS/SATA OOB-Level Signaling
- Programmable SAS/SATA Threshold
Cable-Detect Feature for Low Power Consumption
On-Chip 50Ω Input/Output Terminations
Inline Signal Traces for Simplified Layout
Space-Saving, 3.5mm x 9.0mm TQFN Package with Exposed Pad

The MAX4986 active 2:1/1:2 multiplexer/demultiplexer equalizes and redrives SAS/SATA or SATA-only signals up to 6.0Gbps and operates from a single +3.3V supply.

The MAX4986 features independent input equalization and output preemphasis. The MAX4986 enhances signal integrity at the receiver by equalizing the signal at the input and establishing preemphasis at the output of the device. SAS/SATA and SATA-only out-of-band (OOB) signaling is supported using high-speed amplitude detection on the inputs and squelch on the corresponding outputs. Inputs and outputs are internally 50Ω terminated and must be AC-coupled to the SAS/SATA controller IC and SAS/SATA device.

The MAX4986 is available in a small (3.5mm x 9.0mm), 42-pin TQFN package optimal for simplified layout and space-saving requirements. The MAX4986C is specified over the 0°C to +70°C commercial operating temperature range. The MAX4986E is specified over the -40°C to +85°C extended temperature range.

Applications

Desktops
Docking Stations
PC Servers
Workstations

Part Models: 4
1ku List Price: Starting From $13.86

Documentation

Data Sheet 1

MAX4986: SAS/SATA Single Lane 2:1/1:2 Multiplexer/Demultiplexer Plus Redriver with Equalization Data Sheet (Rev.1) 07/05/2012

Reliability Data 1

MAX4986 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX4986CTO+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX4986CTO+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX4986ETO+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX4986ETO+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Evaluation Kit for the MAX4986

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Features and Benefits

One SATA Host Connector
Two SATA Device Connectors
Application Circuit with SATA Inputs/Outputs
Eye Diagram Test Circuit with SMA Inputs/Outputs
Calibration Traces (50Ω Load Trace and Through Trace)
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX4986 evaluation kit (EV kit) provides a proven design to evaluate the MAX4986 SAS/SATA 2:1/1:2 multiplexer/demultiplexer. The EV kit contains four sections: an application circuit, characterization circuit, and two sets of calibration traces.

The application circuit is designed to demonstrate the MAX4986 in multiplexing and equalizing SAS/SATA signals. This section of the EV kit operates from an external +5V supply that is regulated by an on-board LDO to +3.3V, which powers the MAX4986 (U1). All traces in the application circuit are 100Ω differential controlled-impedance traces.

The characterization circuit is provided for eye diagram evaluation using SMA connectors and 50Ω controlled-impedance traces. This section is powered by an external +3.3V power supply.

For information on the specifications for SATA interfaces, refer to documents defined by the 2.6 release from the Serial ATA industry work group (www.serialata.org), or if superceded, by the most recently released document from the ATA ANSI work group (www.t13.org).