MAX4952A 19-4575 Rev 0 4/09 Dual Equalized 1.5/3.0/6.0 GT/s SAS/SATA Redriver General Description Features The MAX4952A dual-channel redriver is designed to Single +3.3V Supply Operation redrive one full lane of SAS or SATA signals up to SAS Gen I/II Up to 6.0GT/s 6.0GT/s (gigatransfers per second) and operates from Excellent Return Loss a single +3.3V supply. 8dB at 3.0GT/s The MAX4952A features independent input equalization and output preemphasis. The MAX4952A enhances sig- Supports SAS/SATA OOB (Out-of-Band) Signaling nal integrity at the receiver by equalizing the signal at Very Fast Entry and Exit Time the input and establishing preemphasis at the output of 5ns (typ) the device. SAS and SATA OOB (Out-of-Band) signaling Internal Input/Output 50 Termination Resistors is supported using high-speed amplitude detection Selectable Input Equalization on the inputs and squelch on the corresponding outputs. 0, 3dB Inputs and outputs are all internally 50 terminated and Standard 1000mV (typ) Output must be AC-coupled to the SAS/SATA controller IC and P-P SAS/SATA device. Selectable Output Preemphasis The MAX4952A is available in a small 28-pin, 3.5mm x 0, 3dB 5.5mm TQFN package with flowthrough traces for ease Inline Signal Traces for Flowthrough Layout of layout. This device is specified over the 0C to +70C Space-Saving, 3.5mm x 5.5mm TQFN Package operating temperature range. Applications Ordering Information Servers PART TEMP RANGE PIN-PACKAGE Data Storage/Work Stations MAX4952ACTI+ 0C to +70C 28 TQFN-EP* Docking Stations +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Pin Configuration TOP VIEW 24 23 22 21 20 19 18 17 16 15 25 14 PE1 GND 26 13 EQ1 GND GND 27 MAX4952A 12 PE0 GND 28 11 EQ0 *EP 123456789 10 TQFN *CONNECT EXPOSED PAD (EP) TO GND. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE V V CC CC GND GND IN0P OUT0P IN0M OUT0M GND GND OUT1P IN1P OUT1M IN1M GND GND V V CC CC EN MODEDual Equalized 1.5/3.0/6.0 GT/s SAS/SATA Redriver ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) Junction-to-Case Thermal Resistance ( ) (Note 1) JC V ........................................................................-0.3V to +4.0V 28-Pin TQFN................................................................2.7C/W CC All Other Pins..............................................-0.3V to (V + 0.3V) Junction-to-Ambient Thermal Resistance ( ) (Note 1) CC JA Continuous Current (PE , EQ , MODE)............................15mA 28-Pin TQFN.................................................................35C/W Peak Current (for 10kHz, 1% duty cycle) Operating Temperature Range...............................0C to +70C (IN , OUT ) .............................................................100mA Storage Temperature Range .............................-55C to +150C Continuous Power Dissipation (T = +70C) Junction Temperature......................................................+150C A 28-Pin TQFN (derate 28.6mW/C above +70C) .......2286mW Lead Temperature (soldering, 10s) .................................+300C Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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, C = 12nF, R = 50, T = 0C to +70C, unless otherwise noted. Typical values are at V = +3.3V, CC COUPLE L A CC T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Power-Supply Range V 3.0 3.6 V CC EQ = PE = GND 140 175 Operating Supply Current I mA CC EQ = PE = V 175 220 CC Standby Supply Current I EN = GND 16 20 mA STBY Input Termination R Single-ended to V 42.5 57.5 RX-SE CC Output Termination R Single-ended to V 42.5 57.5 TX-SE CC AC PERFORMANCE 0.1GHz f 0.3GHz -10 Differential Input Return Loss S dB DD11 0.3GHz f 3.0GHz -7.9 (Note 3) 3.0GHz f 6.0GHz 0 0.1GHz f 0.3GHz -6 Common-Mode Input Return S dB CC11 0.3GHz f 3.0GHz -5 Loss (Note 3) 3.0GHz f 6.0GHz 0 0.1GHz f 0.3GHz -10 Differential Output Return Loss S dB DD22 0.3GHz f 3.0GHz -7.9 (Note 3) 3.0GHz f 6.0GHz 0 0.1GHz f 0.3GHz -6 Common-Mode Output Return S dB CC22 0.3GHz f 3.0GHz -5 Loss (Note 3) 3.0GHz f 6.0GHz 0 SAS 1.5, 3.0, or 6.0GT/s MODE = GND 275 1600 Differential Input Voltage V mV IN-DIFF P-P SATA 1.5, 3.0, or 6.0GT/s MODE = V 225 1600 CC Input Equalization EQ EQ = V (Note 4) 3 dB CC Differential Output Voltage V f = 750MHz, PE = GND 800 1200 mV OUT-DIFF P-P Output Preemphasis PE PE = V , Figure 1 3 dB CC Propagation Delay t PE = EQ = GND 300 ps PD Output Transition Time T PE = GND, 20% to 80% 30 ps TX-RF 2 MAX4952A