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MAX3786

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

Maxim Integrated 

19-2727; Rev 2; 6/04

EVAALVUAAILTAIOBNLEKIT

1.5Gbps Serial ATA-Compatible Mux/Buffer with

Loopback and Equalization

General Description

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, compati-

ble with 100Ω differential systems, and must be AC-cou-

pled to the controller IC and SATA-compatible disk drive.

Receive equalization (EQ) and transmit preemphasis

(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 PE and EQ 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

1.5Gbps Serial ATA Redundancy

Features

♦ < 50psP-P Total Residual Jitter (20in FR-4, EQ

and PE On)

♦ Supports SATA OOB Signaling

♦ Loopback of Nonselected Channel

♦ Receive Equalization and Transmit Preemphasis

on Controller-Side I/O Channels

♦ 0°C to +85°C Operation

♦ 32-Pin, 5mm ✕ 5mm Thin QFN Package

♦ +3.3V Power Supply

Ordering Information

PART

TEMP RANGE PIN-PACKAGE PKG CODE

MAX3786UTJ

0°C to +85°C

32 Thin QFN-EP*

(5mm × 5mm)

T3255-2

MAX3786UTJ+

0°C to +85°C

32 Thin QFN-EP*

(5mm × 5mm)

—

+Denotes lead-free package.

*EP = Exposed pad.

Typical Application Circuit

2in TO 24in FR-4

CONTROLLER 1

OUT1 IN1

RX

MAX3786

TX

OUT0 IN0

DISK DRIVE

2in TO 24in FR-4

CONTROLLER 2

Pin Configuration and Functional Diagram appear at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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