MAX3786 19-2727 Rev 2 6/04 1.5Gbps Serial ATA-Compatible Mux/Buffer with Loopback and Equalization General Description Features The MAX3786 is an AC-coupled, serial-ATA (SATA)- < 50ps Total Residual Jitter (20in FR-4, EQ P-P compatible, 1.5Gbps multiplexer/buffer (mux/buffer) IC and PE On) that provides the capability to switch a single serial Supports SATA OOB Signaling data signal between two redundant I/O channels. SATA out-of-band (OOB) signaling is supported using Loopback of Nonselected Channel loss-of-signal (LOS) detect on all three inputs and Receive Equalization and Transmit Preemphasis shutdown on the corresponding outputs. The high-speed on Controller-Side I/O Channels inputs and outputs are all internally terminated, compati- ble with 100 differential systems, and must be AC-cou- 0C to +85C Operation pled to the controller IC and SATA-compatible disk drive. 32-Pin, 5mm 5mm Thin QFN Package Receive equalization (EQ) and transmit preemphasis +3.3V Power Supply (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. Ordering Information The MAX3786 operates from a single +3.3V supply and PART TEMP RANGE PIN-PACKAGE PKG CODE typically consumes 520mW with PE and EQ enabled. It is available in a 5mm x 5mm, 32-lead thin QFN 32 Thin QFN-EP* MAX3786UTJ 0C to +85C T3255-2 exposed-pad package and operates over a 0C to (5mm 5mm) +85C temperature range. 32 Thin QFN-EP* MAX3786UTJ+ 0C to +85C (5mm 5mm) Applications +Denotes lead-free package. *EP = Exposed pad. 1.5Gbps Serial ATA Redundancy Typical Application Circuit 2in TO 24in FR-4 CONTROLLER 1 OUT1 IN1 RX MAX3786 TX DISK DRIVE OUT0 IN0 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 Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE CONNECTOR CONNECTOR CONNECTOR CONNECTOR SATA CONNECTOR SATA CONNECTOR1.5Gbps Serial ATA-Compatible Mux/Buffer with Loopback and Equalization ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ......................................-0.5V to +5.0V Voltage at PE1EN, PE0EN, EQ1EN, EQ0EN, CC Continuous Current at Outputs LB EN, SEL, CM1, CM0.........................-0.5V to (V + 0.5V) CC (TX, OUT1, OUT0)............................22mA Continuous Power Dissipation (T = +85C) A Input Voltage 32-Pin Thin QFN (derate 21.3mW/C above +85C) .1384mW (RX, IN1, IN0) ..................................-0.5V to (V + 0.5V) Operating Temperature Range....................0C to +85C CC Differential Input Voltage Storage Temperature Range .........................-55C to +150C (RX, IN1, IN0) .....................................2.0V Lead Temperature (soldering, 10s) ...............+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V, T = 0C to +85C. Typical values at V = +3.3V, T = +25C, unless otherwise noted.) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS EQ and PE off 125 150 Supply Current I mA CC EQ and PE on 158 220 Maximum Data Rate (Note 1) 1.5 Gbps Differential Input Voltage (Note 2) 250 600 mV P-P (RX, IN1, IN0) Input Termination Differential 85 100 115 Input Return Loss S11 100MHz to 2.5GHz 14 dB Input Equalization At 750MHz 4.5 dB PE off 400 500 600 Differential Output Voltage mV P-P (TX, OUT0, OUT1) (Note 2) Output disabled by OOB signaling 30 Output Termination Single ended to V 42.5 50 57.5 CC Output Transition Time 1.5Gbps data, 20% to 80% (Notes 1, 3) 135 200 270 ps Output Preemphasis At 750MHz (Note 4) 4.5 dB Output Jitter DJ + 14RJ, EQ and PE off (Notes 1, 5, 8) 30 40 ps P-P Total Residual Jitter DJ + 14RJ, EQ and PE on (Notes 1, 6, 8) 40 50 ps P-P Differential Output Skew (Note 1) 20 ps LOS Detector Threshold 50 150 mV P-P Output Startup/Shutdown Time (Note 7) 5 ns LVCMOS Input High Voltage V 1.5 V IH 2 MAX3786