MAX3786

1.5Gbps Serial ATA-Compatible Mux/Buffer with Loopback and Equalization

1.5Gbps Serial ATA-Compatible Mux/Buffer with Loopback and Equalization Provides the Capability to Switch a Single Serial-Data Signal Between Two Redundant I/O Channels

Data Sheet (Rev. 2)

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Overview

< 50ps_P-P Total Residual Jitter (20in FR-4, EQ and PE On)
Supports SATA OOB Signaling
Loopback of Nonselected Channel
Receive Equalization and Transmit Pre-Emphasis on Controller-Side I/O Channels
0°C to +85°C Operation
32-Pin, 5mm x 5mm Thin QFN Package
+3.3V Power Supply

The MAX3786 is an AC-coupled, serial-ATA (SATA)-compatible, 1.5Gbps multiplexer/buffer (mux/buffer) IC that provides the capability to switch a single serial data signal between two redundant I/O channels.

SATA out-of-band (OOB) signaling is supported using loss-of-signal (LOS) detect on all three inputs and shutdown on the corresponding outputs. The high-speed inputs and outputs are all internally terminated, compatible with 100Ω differential systems, and must be AC-coupled to the controller IC and SATA-compatible disk drive.

Receive equalization (EQ) and transmit pre-emphasis (PE) are provided on the dual I/O channels to mitigate the effects of intersymbol interference in the signal path. Loopback can be enabled on the nonselected I/O channel.

The MAX3786 operates from a single +3.3V supply and typically consumes 520mW with pre-emphasis and equalization enabled. It is available in a 5mm x 5mm, 32-lead thin QFN exposed-pad package and operates over a 0°C to +85°C temperature range.

Applications