MAX4951 19-4178 Rev 1 5/09 SATA I/SATA II Bidirectional Re-Driver General Description Features The MAX4951 dual-channel buffer is designed to re-drive Single +3.3V (typ) Supply Operation serial-ATA (SATA) I and SATA II signals and is functional Supports SATA I (1.5Gbps) and SATA II (3.0Gbps) up to 6.0Gbps for next-generation data rates. The MAX4951 can be placed near an eSATA connector to Supports up to 6.0Gbps for Next-Generation overcome board losses and produce an eSATA-compati- Applications ble signal level. Meets SATA I, SATA II Input-/Output-Return Loss The MAX4951 preserves signal integrity at the receiver by Mask reestablishing full output levels, and can reduce the total Supports eSATA Levels system jitter (T ) by squaring up the signal. This device J Supports SATA Out-of-Band (OOB) Signaling features channel-independent digital boost controls to drive SATA outputs over longer trace lengths, or to meet Internal Input/Output 50 Termination Resistors eSATA specifications. SATA Out-Of-Band (OOB) signaling Inline Signal Traces for Flow-Through Layout is supported using high-speed amplitude detection on the inputs, and squelch on the corresponding outputs. Inputs ESD Protection on All Pins: 5.5kV and outputs are all internally 50 terminated and must be Space-Saving, 4mm x 4mm, TQFN Package AC-coupled to the SATA controller IC and SATA device. The MAX4951 operates from a single +3.3V (typ) sup- Ordering Information ply and is available in a small, 4mm x 4mm, TQFN package with flow-through traces for ease of layout. PART TEMP RANGE PIN-PACKAGE This device is specified over the 0C to +70C operat- MAX4951CTP+ 0C to +70C 20 TQFN-EP* ing temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Applications Servers Pin Configuration Desktop Computers Notebook Computers TOP VIEW Docking Stations Data Storage/Workstations 15 14 13 12 11 V 10 V 16 CC CC BA GND 17 9 GND 18 8 BB MAX4951 GND 19 7 EN *EP V V 20 6 CC CC 1 2 3 45 TQFN 4mm x 4mm *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. HAP DAP HAM DAM GND GND DBM HBM DBP HBPSATA I/SATA II Bidirectional Re-Driver ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A V ........................................................................-0.3V to +4.0V 20-Pin TQFN (derate 25.6mW/C above +70C) ..... 2051mW CC HAP, HAM, DBP, DBM, EN, BA, BB Junction-to-Case Thermal Resistance ( ) (Note 2) JC (Note 1)...................................................-0.3V to (V + 0.3V) 20-Pin TQFN...................................................................6C/W CC Short-Circuit Output Current Junction-to-Ambient Thermal Resistance ( ) (Note 2) JA (HBP, HBM, DAP, DAM) .................................................90mA 20-Pin TQFN.................................................................39C/W Continuous Current at Inputs Operating Temperature Range...............................0C to +70C (HAP, HAM, DBP, DBM)...............................................30mA Storage Temperature Range .............................-55C to +150C Continuous Current Lead Temperature (soldering, 10s) .................................+300C (EN, BA, BB)...................................................................5mA Note 1: All I/O pins are clamped by internal diodes. Note 2: 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 = 10nF, R = 50, T = 0C to +70C, unless otherwise noted. Typical values are at V = +3.3V, T = +25C.) CC L L A CC A (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Power-Supply Range V 3.0 3.6 V CC BA = BB = V 90 125 CC Operating Supply Current I mA CC BA = BB = GND 70 100 Standby Supply Current I EN = GND 7 10 mA STBY Single-Ended Input Resistance Z 40 RX-SE-DC Differential Input Resistance Z 85 100 115 RX-DIFF-DC Single-Ended Output Resistance Z 40 TX-SE-DC Differential Output Resistance Z 85 100 115 TX-DIFF-DC AC PERFORMANCE f = 150MHz to 300MHz -29 -18 f = 300MHz to 600MHz -26 -14 f = 600MHz to 1200MHz -22 -10 Differential Input Return Loss RL dB RX-DIFF (Note 4) f = 1.2GHz to 2.4GHz -18 -8 f = 2.4GHz to 3.0GHz -15 -3 f = 3.0GHz to 5.0GHz -14 -1 f = 150MHz to 300MHz -5 f = 300MHz to 600MHz -5 f = 600MHz to 1200MHz -2 Common-Mode Input Return Loss RL dB RX-CM (Note 4) f = 1.2GHz to 2.4GHz -2 f = 2.4GHz to 3.0GHz -2 f = 3.0GHz to 5.0GHz -1 2 MAX4951