* MAX9325 * 19-2511 Rev 3 11/04 2:8 Differential LVPECL/LVECL/HSTL Clock and Data Driver General Description Features The MAX9325 low-skew, 2:8 differential driver features 50ps (max) Output-to-Output Skew extremely low output-to-output skew (50ps max) and 1.5ps (max) Random Jitter RMS part-to-part skew (225ps max). These features make the device ideal for clock and data distribution across a Guaranteed 300mV Differential Output at 700MHz backplane or board. The device selects one of the two +2.375V to +3.8V Supplies for Differential differential HSTL or LVECL/LVPECL inputs and repeats them at eight differential outputs. Outputs are compati- HSTL/LVPECL ble with LVECL and LVPECL, and can directly drive -2.375V to -3.8V Supplies for Differential LVECL 50 terminated transmission lines. Two Selectable Differential Inputs The differential inputs can be configured to accept a single-ended signal when the unused complementary On-Chip Reference for Single-Ended Inputs input is connected to the on-chip reference output volt- Outputs Low for Inputs Open or at V EE age V All inputs have internal pulldown resistors to BB. V The internal pulldowns and a fail-safe circuit EE. Pin Compatible with MC100LVE310 ensure differential low default outputs when the inputs are left open or at V . EE The MAX9325 operates over a 2.375V to 3.8V supply range for interfacing to differential HSTL and LVPECL signals. This allows high-performance clock or data dis- Ordering Information tribution in systems with a nominal +2.5V or +3.3V sup- ply. For LVECL operation, the device operates with a PART TEMP RANGE PIN-PACKAGE -2.375V to -3.8V supply. MAX9325EQI -40C to +85C 28 PLCC The MAX9325 is offered in 28-lead PLCC and space- MAX9325EGI -40C to +85C 28 QFN 5mm x 5mm saving 28-lead QFN packages. The MAX9325 is speci- fied for operation from -40C to +85C. Applications Functional Diagram appears at end of data sheet. Precision Clock Distribution Low-Jitter Data Repeaters Pin Configurations TOP VIEW INPUT SELECT TRUTH TABLE 22 25 24 23 21 20 19 CLK SEL INPUT CLOCK L CLK0, CLK0 SELECTED V EE 26 18 Q3 H CLK1, CLK1 SELECTED V 1 21 Q3 EE CLK SEL Q3 27 17 CLK SEL 2 20 Q3 CLKO Q4 28 16 CLKO 3 19 Q4 V V CC 1 15 CC MAX9325 V 4 18 V CLKO 2 14 CC CC Q4 MAX9325 V 3 13 CLKO BB Q5 5 17 Q4 CLK1 4 12 Q5 V 6 16 Q5 BB CLK1 7 15 Q5 56 7 8 9 10 11 PLCC QFN *CORNER PINS AND EXPOSED PAD ARE CONNECTED TO V . EE 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. * Q0 CLK1 Q0 N.C. Q1 Q7 V V CC CC Q7 Q1 Q2 Q6 Q6 Q2 CLK1 8 28 Q0 N.C. 9 27 Q0 Q7 10 26 Q1 V 11 25 V CC CC Q7 12 24 Q1 Q6 13 23 Q2 Q6 14 22 Q2 *2:8 Differential LVPECL/LVECL/HSTL Clock and Data Driver ABSOLUTE MAXIMUM RATINGS V - V ...............................................................-0.3V to +4.1V 28-Lead QFN (derate 20.8mW/C above +70C) ....1667mW CC EE Inputs (CLK , CLK , CLK SEL) to V ......-0.3V to (V + 0.3V) in Still Air ............................................................+48C/W EE CC JA CLK to CLK .....................................................................3.0V ..............................................................................+2C/W JC Continuous Output Current.................................................50mA Operating Temperature Range ...........................-40C to +85C Surge Output Current........................................................100mA Junction Temperature......................................................+150C V Sink/Source Current................................................0.65mA Storage Temperature Range .............................-65C to +150C BB Continuous Power Dissipation (T = +70C) ESD Protection A 28-Lead PLCC (derate 10.5mW/C above +70C) .....842mW Human Body Model (CLK , CLK , Q , Q ).................... 2kV in Still Air .............................................................+95C/W Soldering Temperature (10s)...........................................+300C JA .............................................................................+25C/W JC 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. DC ELECTRICAL CHARACTERISTICS ((V - V ) = 2.375V to 3.8V, R = 50 1% to V - 2V. Typical values are at (V - V ) = 3.3V, V = (V - 1V), V = (V - 1.5V).) CC EE L CC CC EE IH CC IL CC (Notes 14) -40C +25C +85C PARAMETER SYMBOL CONDITIONS UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX SINGLE-ENDED INPUT (CLK SEL) Single-Ended V V V CC CC CC Input High V Figure 1 V V V V IH CC CC CC - 1.165 - 1.165 - 1.165 Voltage Single-Ended V V V CC CC CC Input Low V Figure 1 V V V V IL EE EE EE - 1.475 - 1.475 - 1.475 Voltage Input Current I V , V -10.0 +150 -10.0 +150 -10.0 +150 A IN IH IL DIFFERENTIAL INPUT (CLK , CLK ) Single-Ended V V V CC CC CC Input High V Figure 1 V V V V IH CC CC CC - 1.165 - 1.165 - 1.165 Voltage Single-Ended V V VCC CC CC Input Low V Figure 1 V V V V IL EE EE EE - 1.475 - 1.475 - 1.475 Voltage Differential Input V V V EE EE EE V Figure 1 V V V V IHD CC CC CC High Voltage + 1.2 + 1.2 + 1.2 2 MAX9325