MAX4951C

PRODUCTION

6Gbps SATA Bidirectional Redriver with Input Equalization, Preemphasis, and Advanced Power Management

Maintains Output Common-Mode Levels to Meet the Internal SATA 3.0 Standard

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $3.32

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Overview

Unique Design Saves Power
- Low-Power, 20µA (typ) SATA Cable/Drive Detect
- Dynamic Power Reduction
  - Reduced Power Consumption When Idle
  - Maintains Common-Mode Output Level
  - No Loss of Data When Coming Out of Low-Power Mode
Allows Design Flexibility
- Single +3.3V Supply Operation
- SATA 3i (6.0Gbps) and SATA 2i/2m (3.0Gbps) Compliant
- SATA 1i/1m (1.5Gbps) Compatible
Permits Longer Trace Lengths
- Input Equalization
- Selectable Output Preemphasis
High Level of Integration for Performance
- Excellent Input/Output Return Loss Up to 6Gbps
- Supports SATA 2i and 3i Output Levels
- Supports SATA OOB Signaling
- OOB Detection: 3ns (typ)
- High ESD Protection on All Pins: ±8kV (HBM)
Saves Board Space
- On-Chip 50Ω Input/Output Termination Resistors
- Inline Signal Traces for Flow-Through Layout
- Space-Saving, 4mm × 4mm TQFN Package with Exposed Pad
- Pin Compatible with the MAX4951BE

The MAX4951C 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. 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 receiver by reestablishing full output levels and reducing the total system jitter (T_J) by providing equalization. The device features 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 corresponding outputs. Inputs and outputs are all internally 50Ω terminated and must be AC-coupled to the SATA controller IC and SATA device.

The MAX4951C 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 commercial 0°C to +70°C operating temperature range. The MAX4951C is also pin compatible with the MAX4951BE SATA 6.0Gbps redriver.

Applications

Data Storage/Workstations
Desktop Computers
Docking Stations
Laptop Computers
Servers

Part Models: 2
1ku List Price: Starting From $3.32

Documentation

Data Sheet 1

MAX4951C: 6Gbps SATA Bidirectional Redriver with Input Equalization, Preemphasis, and Advanced Power Management Data Sheet (Rev.0) 04/07/2011

Reliability Data 1

MAX4951C 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
MAX4951CCTP+	20-LFCSP-4X4X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX4951CCTP+T	20-LFCSP-4X4X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 14, 2023 - 2275A WAFER FAB
		pcn_2275a
MAX4951CCTP+	PRODUCTION
MAX4951CCTP+T	PRODUCTION

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

Evaluation Kits

Evaluation Kit for the MAX4951C

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Features and Benefits

Application Circuit with SATA Input/Output
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 MAX4951C evaluation kit (EV kit) provides a proven design to evaluate the MAX4951C dual-channel buffer. 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 device's use in redriving serial-ATA (SATA) signals and SATA cable detection. 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 device. 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.