Datasheet

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MAX14970 Ruggedized 6Gbps SATA Redriver with High

ESD and Extended Temperature Operation

General Description

The MAX14970 dual-channel buffer with input equaliza-

tion and preemphasis is ideal to redrive internal serial-ATA

(SATA) 1i, 2i, and 3i signals as well as eSATA 1m and 2m

signals. The device features high electrostatic discharge

(ESD), ±8kV Human Body Model (HBM) protection. The

device can be placed near a SATA connector on the moth-

erboard to overcome board losses and guarantee SATA

compliance. The device is SATA specification version 3.0

(gold standard) compliant and can also be pin configured for

SATA specification version 2.6 (gold standard) compliance.

The device features hardware SATA-drive cable detection

that automatically places the device into a standby mode

that consumes less than 20µA (typ) standby current when

no drive is connected. In addition, the device features an

independent channel dynamic power-down mode where

power consumption is reduced when no input signal is

present. The device maintains output common-mode

levels to meet internal SATA version 3.0 standards and

prevent delays when coming out of low-power mode.

The device preserves signal integrity at the receiv er by

reestablishing full output levels and reducing the total sys-

tem jitter (T

) by providing equalization. The device fea-

tures channel-independent digital preemphasis controls

to drive SATA outputs over longer trace lengths to meet

internal SATA specifications. SATA out-of-band (OOB)

signaling is supported using high-speed out-of-band

signal detection on the inputs, and squelch on the cor-

responding outputs. Inputs and outputs are all internally

50Ω terminated and must be AC-coupled to the SATA

controller IC and SATA device.

The device operates from a single +3.3V (typ) supply, is

available in a small, 4mm x 4mm TQFN package with flow-

through traces for ease of layout, and is specified over the

extended -40ºC to +85ºC operating temperature range.

Benets and Features

● Robust Solution for Harsh Environments

• Extended Temp Rating: -40°C to +85°C

• High ESD Protection on All Pins: ±8kV (HBM)

• TQFN (4mm x 4mm) Package for Resistance to

Vibration/Shocks

● Unique Power-Saving Design

• Standby State: <1mW (typ)

• Dynamic Power-Down State

Idle State: 52.8mW (typ)

Active State: 231mW (typ)

● Design Flexibility

• Input Equalization and Selectable Output

Preemphasis

• Single 3.3V Supply Operation

• SATA 3i (6.0Gbps), SATA 2i/2m (3.0Gbps),

and SATA 1i/1m(1.5Gbps) Compatible

Applications

● Industrial/Embedded PC

● Portable IPC/HMI

● Industrial Server

● Medical

● SATA SSDs or HDDs

19-6479; Rev 0; 3/13

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer

to: www.maximintegrated.com/MAX14970.related

Summary of content (12 pages)

PAGE 1
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation General Description The MAX14970 dual-channel buffer with input equalization and preemphasis is ideal to redrive internal serial-ATA (SATA) 1i, 2i, and 3i signals as well as eSATA 1m and 2m signals. The device features high electrostatic discharge (ESD), ±8kV Human Body Model (HBM) protection. The device can be placed near a SATA connector on the motherboard to overcome board losses and guarantee SATA compliance.
PAGE 2
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Absolute Maximum Ratings (All voltages referenced to GND, unless otherwise noted.) VCC....................................................................... -0.3V to +4.0V AINP, AINM, BINP, BINM, EN, CAD, MODE, PA, PB (Note 1)........................ -0.3V to (VCC + 0.3V) Short-Circuit Output Current AOUTP, AOUTM, BOUTP, BOUTM...............................±30mA Continuous Current at Inputs AINP, AINM, BINP, BINM....
PAGE 3
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Electrical Characteristics (continued) (VCC = +3.0V to +3.6V, CCL = 10nF coupling capacitor on each output, RL = 50Ω, TA = -40ºC to +85ºC, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25ºC.
PAGE 4
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Electrical Characteristics (continued) (VCC = +3.0V to +3.6V, CCL = 10nF coupling capacitor on each output, RL = 50I, TA = -40ºC to +85ºC, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25NC.
PAGE 5
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Typical Operating Characteristics (VCC = +3.3V, TA = +25°C, all eye diagrams measured using K28.5 pattern, unless otherwise noted.) VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 1.5Gbps VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 3.0Gbps MAX14970 toc01 VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 6.
PAGE 6
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Typical Operating Characteristics (continued) (VCC = +3.3V, TA = +25°C, all eye diagrams measured using K28.5 pattern, unless otherwise noted.) MAX14970 toc10 VRX-DFF-PP = 1000mVP-P, PA = VCC, DATA RATE = 3.0Gbps VRX-DFF-PP = 1000mVP-P, PA = VCC, DATA RATE = 6.
PAGE 7
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation AOUTM GND BINM BINP TOP VIEW AOUTP Pin Configuration 15 14 13 12 11 VCC 16 10 VCC GND 17 9 PA 8 PB 7 EN 6 VCC CAD 18 MAX14970 MODE 19 3 4 5 BOUTP 2 BOUTM AINP 1 GND + AINM VCC 20 *EP TQFN (4mm × 4mm) *CONNECT EXPOSED PAD (EP) TO GND.
PAGE 8
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Functional Diagram/Truth Table MODE VCC MAX14970 VCC VOOB_TH_LOW (mVP-P) VOOB_TH_HIGH (mVP-P) 0 75 200 1 50 150 VCC 50Ω 50Ω 50Ω 50Ω EN PA PB CHANNEL A CHANNEL B 0 X X STANDBY STANDBY AINP AOUTP 1 0 0 STANDARD SATA STANDARD SATA AINM AOUTM 1 1 0 PREEMPHASIS STANDARD SATA 1 0 1 STANDARD SATA PREEMPHASIS 1 1 1 PREEMPHASIS PREEMPHASIS VCC VCC 50Ω 50Ω 50Ω 50Ω BOUTM BI
PAGE 9
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Cable-Detect Input dynamic power-down mode, making the device ideal for internal SATA applications. The device features an active-low, cable-detect input (CAD) for use in external SATA applications. CAD has an internal 390kI (typ) pullup resistor. Drive CAD high or leave uncon nected to place the device into low-power standby mode. In this mode, the buffers are disabled, reducing supply current to 20FA (typ).
PAGE 10
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Exposed-Pad Package The exposed-pad, 20-pin TQFN package incorporates features that provide a very low-thermal resistance path for heat removal from the device. The exposed pad on the device must be soldered to GND for proper thermal and electrical performance. For more information on exposedpad packages, refer to Application Note 862: HFAN-08.1: Thermal Considerations of QFN and Other ExposedPaddle Packages.
PAGE 11
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation +3.3V 1µF 0.01µF VCC 1 10nF (X7R) 10nF (X7R) AINP Tx 2 AOUTP 10nF (X7R) Rx 10nF (X7R) AINM MAX14970 3 AOUTM 4 SATA HOST CONTROLLER 10nF (X7R) 10nF (X7R) BOUTM Rx Tx 10nF (X7R) BOUTP MODE EN GPIO GPIO PA PB EXTERNAL HARD DRIVE 5 BINM 10nF (X7R) eSATA DEVICE CONNECTOR BINP 6 CAD 7 OR 1* GND VCC *PINS 1 AND 7 CAN BE INTERCHANGED DEPENDING ON THE LAYOUT. Figure 4.
PAGE 12
MAX14970 Ruggedized 6Gbps SATA Redriver with High ESD and Extended Temperature Operation Revision History REVISION NUMBER REVISION DATE 0 3/13 DESCRIPTION Initial release PAGES CHANGED — For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product.