19-2197; Rev 0; 10/01 MAX3783 Evaluation Kit Features ♦ Fully Assembled and Tested ♦ Single +3.3V Power-Supply Operation ♦ Termination of Unused Outputs Provided OnBoard ♦ Easy Selection of Operating Modes Ordering Information Component List DESIGNATION QTY DESCRIPTION PART TEMP. RANGE IC PACKAGE MAX3783EVKIT 0°C to +85°C 48 TQFP-EP* C1–C40 40 0.1µF ±10% ceramic capacitors (0402) Murata GRM36X5R104K010AD C41 1 33µF ±10% tantalum capacitor (C) AVX TAJC336K010 C42 1 2.2µF ±10% tantalum capacitor (C) AVX TAJC225K035 J1–J28 28 SMA connectors (edge-mount) SUPPLIER J29, J30 2 Test points *Exposed pad Component Suppliers PHONE FAX AVX 803-946-0690 803-626-3123 847-639-6400 847-639-1469 814-237-1431 814-238-0490 JU1–JU6 6 1 × 2-pin headers (0.1in centers) Coilcraft 1 47nH inductor (0805) Coilcraft 0805CS-470XKBC Murata L1 R1–R6 6 1kΩ ±1% resistors (0603) R7–R13 7 100Ω ±1% resistors (0603) U1 1 MAX3783UCM 48-pin TQFP-EP (exposed pad) None 6 Shunts None 1 MAX3783 evaluation board None 1 MAX3783 data sheet Quick Start 1) Remove R12 (differential termination resistor) from the evaluation board. Note: Be sure to clean flux residue thoroughly. 2) Apply +3.3V to the VCC pin (J29). Connect powersupply ground to the GND pin (J30). 3) Shunt jumper JU5 (SELA). Refer to Table 1 for other configurations. 4) Apply up to 3.125Gbps differential data to LI2A± (J17 and J18). 5) Connect SOA± (J23 and J24) to a high-speed 50Ω oscilloscope. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluates: MAX3783 General Description The MAX3783 evaluation kit (EV kit) is an assembled demonstration board that provides easy evaluation of the MAX3783 multiplexer/buffer. The MAX3783 EV kit provides 100Ω differential output terminations onboard, simplifying termination of unused outputs. Evaluates: MAX3783 MAX3783 Evaluation Kit Detailed Description Connecting CML Outputs to 50Ω Oscilloscopes CML outputs have a common-mode voltage near VCC, which is incompatible with oscilloscopes terminated in 50Ω to ground. To avoid interfering with the commonmode voltage, all MAX3783 CML outputs are AC-coupled on-board with 0.1µF capacitors. The CML outputs should not be connected directly through 50Ω to ground. Terminating Unused Outputs The MAX3783 EV kit has 100Ω differential resistors placed across all outputs. These resistors must be removed before connecting the outputs to a 50Ω oscilloscope. For best performance, keep all outputs terminated, either to a 50Ω measurement device or to the 100Ω differential resistor. 2 Control Lines Jumpers JU1–JU6 are provided to set the operating mode of the MAX3783. Shorting these jumpers pulls the corresponding TTL control line to a logical zero. All TTL control lines are internally pulled high through 15kΩ resistors. See Table 1 to set operating modes. Exposed Pad (EP) Package The exposed pad 48-pin TQFP-EP provides a very low thermal-resistance path for heat removal from the IC. The pad is also electrical ground on the MAX3783 and must be soldered to the circuit board for proper thermal and electrical performance. Table 1. Operating Modes SEL_ SO_ LB_ LO_ 0 LI2_ 0 LI_ 1 LI1_ 1 SI_ _______________________________________________________________________________________ MAX3783 Evaluation Kit J29 C41 J30 33µF LO2A+ J20 C35 0.1µF C36 0.1µF L1 47nH C32 0.1µF R12 100Ω C31 0.1µF R10 100Ω R11 100Ω VCC VCC LO2AJ19 C33 0.1µF C34 0.1µF VCC C42 2.2µF R6 1kΩ LO1AJ21 SOAJ23 SOA+ J24 Evaluates: MAX3783 LO1A+ J22 VCC VCC JU5 SELA 7 C3 0.1µF 8 VCC 9 10 11 SIB- 12 R5 1kΩ JU6 SELB C39 0.1µF VCC GND LO2A- VCC LO2A+ LO1A- VCC LO1A+ SOA- VCC GND J28 34 VCC LI2A+ LI2AC25 0.1µF 32 LI1AC23 0.1µF 31 30 GND VCC LI1B+ SIB+ SIB- VCC 26 LI2B25 LI2B+ J15 27 VCC LI1B+ C21 0.1µF LI2B+ C19 0.1µF LI1A+ C24 0.1µF J13 LI1BC22 0.1µF J11 LI2BC20 0.1µF 29 28 J18 J17 33 LI1B- J16 J14 J12 VCC 13 14 15 16 17 18 19 20 21 22 23 24 VCC VCC R8 100Ω VCC VCC C5 C6 C7 C8 C9 C12 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF J26 C40 R13 0.1µF 100Ω 35 LB2B GND C26 0.1µF 36 LB1B C38 0.1µF J27 LI1A- MAX3783 LB2A SELB C4 0.1µF LB1A GND JU3 LB1B JU4 LB2B 6 LI1A+ VCC 5 VCC U1 LO2B- JU1 LB1A JU2 LB2A SIA+ VCC LO2B+ 4 LI2A- VCC VCC SIA- LO1B- SIB+ J4 3 LO1B+ R1 1kΩ R2 1kΩ R3 1kΩ R4 1kΩ J3 2 C2 0.1µF SIA+ LI2A+ VCC J2 GND SOB- SIA- 1 SOB+ C1 0.1µF VCC J1 SOA+ SELA 48 47 46 45 44 43 42 41 40 39 38 37 C15 0.1µF C37 0.1µF J25 C10 0.1µF J5 SOB+ VCC C16 0.1µF R9 100Ω R7 100Ω C17 0.1µF C11 0.1µF J9 J6 SOB- LO2B+ J7 LO1B+ C18 0.1µF C27 C28 C29 C30 C13 C14 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF 0.1µF J10 LO2B- J8 LO1B- Figure 1. MAX3783 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluates: MAX3783 MAX3783 Evaluation Kit 1.0" Figure 2. MAX3783 EV Kit Component Placement Guide—Component Side 4 _______________________________________________________________________________________ MAX3783 Evaluation Kit Evaluates: MAX3783 1.0" 1.0" Figure 3. MAX3783 EV Kit PC Board Layout—Component Side 1.0" Figure 4. MAX3783 EV Kit PC Board Layout—Ground Plane 1.0" Figure 5. MAX3783 EV Kit PC Board Layout—Power Plane Figure 6. MAX3783 EV Kit PC Board Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 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