MAX9389 19-2688 Rev 0 1/03 Differential 8:1 ECL/PECL Multiplexer with Dual Output Buffers General Description Features The MAX9389 is a fully differential, high-speed, low-jitter, 310ps Propagation Delay 8-to-1 ECL/PECL multiplexer (mux) with dual output Guaranteed 2.7GHz Operating Frequency buffers. The device is designed for clock and data distri- bution applications, and features extremely low propa- 0.3ps Random Jitter RMS gation delay (310ps typ) and output-to-output skew <30ps Output-to-Output Skew (30ps max). -2.375V to -5.5V Supplies for Differential Three single-ended select inputs, SEL0, SEL1, and SEL2, control the mux function. The mux select inputs are com- LVECL/ECL patible with ECL/PECL logic, and are internally refer- +2.375V to +5.5V Supplies for Differential enced to the on-chip reference output (V , V ), BB1 BB2 LVPECL/PECL nominally V - 1.425V. The select inputs accept signals CC between V and V . Internal pulldowns to V ensure CC EE EE Outputs Low for Open Inputs a low default condition if the select inputs are left open. Dual Output Buffers The differential inputs D , D can be configured to >2kV ESD Protection (Human Body Model) accept a single-ended signal when the unused comple- mentary input is connected to the on-chip reference output (V , V ). All the differential inputs have Ordering Information BB1 BB2 internal bias and clamping circuits that ensure a low PART TEMP RANGE PIN-PACKAGE output state when the inputs are left open. MAX9389EHJ -40C to +85C 32 TQFP The MAX9389 operates with a wide supply range V - CC MAX9389ETJ* -40C to +85C 32 Thin QFN V of 2.375V to 5.5V. The device is offered in 32-pin EE TQFP and thin QFN packages, and operates over the *Future productcontact factory for availability. -40C to +85C extended temperature range. Applications Functional Diagram High-Speed Telecom and Datacom Applications Central-Office Backplane Clock Distribution D0 MAX9389 D0 DSLAM/DLC D1 D1 Pin Configurations D2 V CC V D2 EE TOP VIEW D3 32 31 30 29 28 27 26 25 D3 Q0 MUX D4 8:1 Q0 V 1 24 SEL1 CC D4 Q1 V 2 23 SEL0 BB2 D5 Q1 V 3 22 V BB1 CC D5 V BB1 D0 4 21 D7 D6 MAX9389 V BB2 D0 5 20 D7 D6 D1 6 19 D6 D7 D1 7 18 D6 D7 V CC V 8 17 V CC EE SEL0 232k 180k 9 10 11 12 13 14 15 16 SEL1 D SEL2 D 165k 180k 180k TQFP V V EE EE Pin Configurations continued 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. D2 V EE D2 Q0 D3 Q0 D3 V CC D4 Q1 D4 Q1 D5 V CC D5 SEL2Differential 8:1 ECL/PECL Multiplexer with Dual Output Buffers ABSOLUTE MAXIMUM RATINGS V - V ..............................................................-0.3V to +6.0V 32-Lead QFN (derate 21.3mW/C above +70C) .....1702mW CC EE Inputs (D , D , SEL ) to V ......................-0.3V to (V + 0.3V) in Still Air..........................................................+47C/W EE CC JA D to D ...............................................................................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 ..............................................600A Storage Temperature Range .............................-65C to +150C BB Continuous Power Dissipation (T = +70C) ESD Protection A 32-Lead TQFP (derate 13.1mW/C above +70C) ...1047mW Human Body Model (D , D , Q , Q , SEL , V ) .............2kV BB in Still Air..........................................................+76C/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 5.5V, outputs loaded with 50 1% to V - 2V. Typical values are at V - V = 3.3V, V = V - 1V, CC EE CC CC EE IHD CC V = V - 1.5V, unless otherwise noted.) (Notes 14) ILD CC -40C +25C +85C PARAMETER SYMBOL CONDITIONS UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX INPUT (D , D , SEL ) Single-Ended V connected to the V - V - V - V - V - V - BB CC CC CC CC CC CC Input High V V IH unused input, Figure 1 1.225 0.880 1.225 0.880 1.225 0.880 Voltage Single-Ended V connected to the V - V - V - V - V - V - BB CC CC CC CC CC CC Input Low V V IL unused input, Figure 1 1.945 1.625 1.945 1.625 1.945 1.625 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 Differential Input V - V - V - CC CC CC V Figure 1 V V V V ILD EE EE EE Low Voltage 0.095 0.095 0.095 V - V < V - V - V - CC EE CC CC CC 0.095 0.095 0.095 3.0V V V V EE EE EE Differential Input V - IHD Figure 1 V Voltage V ILD V - V CC EE 0.095 3.000 0.095 3.000 0.095 3.000 3.0V Input Current I V V V V -60 +60 -60 +60 -60 +60 A IN IH, IL, IHD, ILD OUTPUT (Q , Q ) Single-Ended V - V - V - V - V - V - CC CC CC CC CC CC Output High V Figure 2 V OH 1.145 0.895 1.145 0.895 1.145 0.895 Voltage 2 MAX9389