Analog Devices MAX4951C Product Info

• 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 comp