19-1427; Rev 0; 1/99 MAX3690 Evaluation Kit The MAX3690 evaluation kit (EV kit) is an assembled surface-mount demonstration board that provides easy evaluation of the MAX3690 622Mbps serializer with TTL input, clock synthesis, and differential PECL output. Component List DESIGNATION QTY C4–C12, C16–C21 C13, C22 DESCRIPTION 15 0.1µF, 25V min, 10% ceramic capacitors (0603) 2 1µF, 10V min, 10% ceramic capacitors (0805) X7R C14 1 1µF, 25V min, 10% ceramic capacitor (0805) C15* 1 33µF ±10%, 10V min tantalum cap AVX TAJD336K010 C2, C3, R2, R11, JU1, JU2, JU4 0 Do not install L1–L5* 5 56nH inductors Coilcraft 0805CS-560XKBC R3, R4 2 27Ω, 5% resistors (0603) R5, R6 2 220Ω, 5% resistors (0603) R7, R8 2 130Ω, 5% resistors (0603) R9, R10 2 24Ω, 5% resistors (0603) R12 1 20kΩ, 5% resistor (0603) PCLKI, PD0–PD7, PCLKO 10 SMB connectors (PC mount) Suhner 82 SMB-50-0-1/111 RCLK, SD+, SD- 3 SMA connectors (PC mount) E.F. Johnson 142-0701-206 or Digi-Key J495-ND VCC, GND 2 Test points Mouser 151-203 JU3 1 2x2 pin header (0.1" centers) Digi-Key S2012-36-ND None 1 Shunt Digi-Key S9000-ND U1* 1 MAX3690ECJ (32 TQFP) None 1 MAX3690 EV kit circuit board, Rev. B None 1 MAX3690 data sheet* * Supplied by Maxim. ____________________________Features ♦ +3.3V Single Supply ♦ 77.76MHz Overhead Generation Clock Reference Frequency ♦ Selectable Input Clock Reference Frequencies 77.76MHz 51.84MHz 38.88MHz ♦ Fully Assembled and Tested Surface-Mount Board Ordering Information PART MAX3690EVKIT TEMP. RANGE -40°C to +85°C IC PACKAGE 32 TQFP Component Suppliers PHONE FAX Coilcraft SUPPLIER 847-639-6400 847-639-1469 Sprague 603-224-1961 603-224-1430 Note: Please indicate that you are using the MAX3690 when contacting these component suppliers. Detailed Description The MAX3690 EV kit simplifies evaluation of the MAX3690ECJ. The EV kit operates from a single +3.3V supply and includes all the external components necessary to interface with TTL inputs and 3.3V PECL outputs. PD_, PCLKI These TTL inputs are high impedance, with a range of 0 to VCC (+3.3V) with respect to ground. All input signal lines are of equal length to minimize propagation-delay skew. RCLK See Table 1 for changing reference clock rates. In normal operation with a high-impedance TTL reference source, RCLK should be driven like PCLKI with R2 open and C2 shorted. If RCLK is driven by a 50Ω TTL source, R2 should be 50Ω, JU1 should be shorted, and C2 should be shorted. If a non-TTL source is used for RCLK, C2 = 0.1µF (ensure trace under C2 is cut) and V CC / 2 should be applied to the stub on the nonground side of JU1. Important: Note that the output of the reference clock generator must swing at least 1.2V peak to peak. PCLKO PCLKO is designed to drive a high-impedance TTL input. To drive other I/O standards, a converter on this output is recommended. The PCLKO output is sensitive to capacitance loading (see MAX3690 data sheet for specified capacitance loading). ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Evaluates: MAX3690 General Description SD+, SD- Table 1. Jumper JU3 Functions The PECL outputs have an attenuation and impedance matching network on the EV board that allows 50Ω terminations to ground for oscilloscope interfacing. All signal inputs and outputs use coupled 50Ω transmission lines. All output signal lines are of equal length. SHUNT LOCATION REFERENCE CLOCK FREQUENCY 1–2* 51.84 Connected to a 20kΩ termination to GND 3–4* 38.88 Connected to GND Open 77.76 Floating CKSET PIN * Pins 1 and 2 are the top two pins. JU2 C22 1µF +3.3V JU3 C12 0.1µF R12 20k VCCVCO C11 0.1µF VCCPLL R11 OPEN JU4 VCCPLL 25 JU1 26 R2 OPEN 27 RCLK 17 C7 0.1µF GND GND 18 GND CKSET VCC FIL- 19 VCC GND SD+ RCLK SD- 31 32 PCLKI PCLKO GND PCLKO GND GND J5 1 PD0 2 3 4 5 6 7 PD7 C5 0.1µF VCC VCC PD6 30 PCLKI MAX3690 PD5 29 VCCDIG J3 VCC VCC PD4 28 VCCPLL 8 C21 0.1µF +3.3V R7 130Ω R6 220Ω C8 0.1µF 15 R4 27Ω 14 13 12 VCCECL VCCLVDS +3.3V J15 11 10 C6 0.1µF R10 R8 24Ω 130Ω JU11 L1 56nH R6 220Ω C9 0.1µF PCLKO 9 J11 PD7 J12 PD6 VCCVCO C16 0.1µF JU12 L2 56nH C17 0.1µF JU13 L3 J17 +3.3V C15 33µF J18 56nH C18 0.1µF C14 1µF JU14 L4 GND 56nH VCCPLL J7 J9 PD5 PD2 VCCDIG J8 PD3 J10 PD4 VCCECL C19 0.1µF JU15 L5 56nH VCCLVDS C20 0.1µF Figure 1. MAX3690 EV Kit Schematic 2 J14 SD- J6 PD1 J13 SD+ 16 U1 PD3 C2 SHORT 20 GND PD2 J2 C4 0.1µF 21 PD1 C3 0.1µF 22 FIL+ 23 GND 24 R3 27Ω R9 24Ω C10 0.1µF C13 1µF PD0 Evaluates: MAX3690 MAX3690 Evaluation Kit _______________________________________________________________________________________ MAX3690 Evaluation Kit Evaluates: MAX3690 1.0" 1.0" Figure 2. MAX3690 EV Kit PC Board Layout—Component Side Figure 3. MAX3690 EV Kit PC Board Layout—Solder Side 1.0" 1.0" 1.0" 1.0" Figure 4. MAX3690 EV Kit PC Board Layout—Power Plane Figure 5. MAX3690 EV Kit PC Board Layout—Ground Plane _______________________________________________________________________________________ 3 Evaluates: MAX3690 MAX3690 Evaluation Kit 1.0" Figure 6. MAX3690 EV Kit PC Board Layout—Silk Screen 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. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.