Evaluates: MAX4885E 19-4417 Rev 0 1/09 MAX4885E Evaluation Kit General Description Features The MAX4885E evaluation kit (EV kit) is an assembled 1:2 Switch for VGA Signals and tested circuit board that contains all the compo- VGA Connections and Power nents necessary to evaluate the MAX4885E IC. The Single 5V DC Power Supply (VIN) MAX4885E is a 1:2 switch for VGA signals. The EV kit can be powered from the 5V DC delivered through the LED Indicators for Switch Connections VGA cable. The EV kit can also operate from an exter- Evaluates the MAX4885E in a 4mm x 4mm x 0.8mm, nal 5V 10% DC power supply. 24-Pin TQFN Package with an Exposed Pad Lead(Pb)-Free and RoHS Compliant Fully Assembled and Tested Ordering Information PART TYPE MAX4885EEVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION D3, D4, D5 3 Green surface-mount LEDs (0805) B 0, B 1, B 2, H0, H1, G 0, JU1, JU2 2 3-pin headers G 1, G 2, R 0, pnp transistor (SOT23) R 1, R 2, Q1 1 Fairchild MMBT3906 19 White test points, 40 mil drill size SCL0, SCL1, (Top Mark: 2A) SCL2, SDA0, R1, R2 2 10k 5% resistors (0603) SDA1, SDA2, R3R6 4 680 5% resistors (0603) V0, V1 1:2 VGA switch (24 TQFN-EP*) 1F 10%, 10V X5R ceramic U1 1 Maxim MAX4885EETG+ capacitor (0603) C1 1 Murata GRM188R61A105K or VGA0, VGA1, 15-pin VGA, HD sub-D 15-pin female 3 TDK C1608X5R1A105K VGA2 connectors 0.1F 10%, 50V X7R ceramic 2 Shunts (JU1, JU2) capacitors (0603) 1 PCB: MAX4885E Evaluation Kit+ C2, C3 2 Murata GRM188R71H104K or *EP = Exposed pad. TDK C1608X7R1H104K 40V, 500mA Schottky diodes (SOT563) D1, D2 2 Central Semi CMLSH05-4+ (Top Mark: C54) Component Suppliers SUPPLIER PHONE WEBSITE Central Semiconductor Corp. 631-435-1110 www.centralsemi.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX4885E when contacting these component suppliers. 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.MAX4885E Evaluation Kit can be powered from the 5V DC (typically up to 10mA) Quick Start that is delivered through the VGA cable or an external Required Equipment regulated 5V DC power supply. The MAX4885E EV kit MAX4885E EV kit also provides test points to monitor the individual video signals on the EV kit. 5V, 100mA DC power supply (optional) One user-supplied PC Power Source Mismatch Protection The EV kit circuit features two wired-OR Schottky One 15-pin, VGA HD sub-D cable (all pins present) diodes (D1 and D2) to prevent damage due to mis- Two VGA monitors matching power-supply voltages. Procedure VGA Signal-Path Indicators The MAX4885E EV kit is fully assembled and tested. The MAX4885E EV kit features three LEDs (D3, D4, and Follow the steps below to verify board operation. D5) to indicate the VGA signal paths on the EV kit. Caution: Do not turn on the power supply until all LEDs D3 and D4 light when VGA0 is connected to connections are completed. VGA1. Similarly, LEDs D3 and D5 light when VGA0 is 1) Verify that a shunt is installed on pins 1-2 of jumper connected to VGA2. JU1 (EV kit enabled). Printed-Circuit Board (PCB) 2) Verify that a shunt is installed on pins 2-3 of jumper The MAX4885E EV kit is built on a four-layer, 1oz cop- JU2 (VGA0 connected to VGA1). per FR4 PCB. All the video signal trace impedances are 3) Connect the PC VGA output to the VGA0 connector. controlled to 75 and a matched length to 25 mils. 4) Connect the first monitor to the VGA1 connector on Jumper Selection the EV kit. Enable, EN (JU1) 5) Connect the second monitor to the VGA2 connector The MAX4885E EV kit provides jumper JU1 to enable or on the EV kit. disable the MAX4885E IC, thus reducing the supply 6) Turn on the power to the PC and both monitors. current to the EV kit. Table 1 lists JU1 options to enable or disable the MAX4885E EV kit. 7) Verify that both green LEDs D3 and D4 are on (if not, verify that the VGA cable from the PC has all 15 pins present. If pin 9 on the VGA cable is missing, Table 1. JU1 Jumper Functions (EN) use an external power supply. Connect the 5V SHUNT EN PIN MAX4885E EV KIT external power supply across the VIN and GND POSITION CONNECTED TO FUNCTION PCB pads.) 1-2* VCC (through resistor R1) Enabled 8) Verify that the first monitor is in operation, while the 2-3 GND (through resistor R1) Disabled second monitor is off. 9) Move the shunt on jumper JU2 to pins 1-2 (VGA0 *Default position. connected to VGA2). VGA Channel Select, SEL (JU2) 10) Verify that both green LEDs D3 and D5 are on. The MAX4885E EV kit provides jumper JU2 to select the connection between the video source connector 11) Verify that the second monitor is in operation, while (VGA0) to one of the two destination connectors (VGA1 the first monitor is off. or VGA2). Table 2 lists jumper JU2 options. 12) Move the shunt on jumper JU1 to pins 2-3 (EV kit disabled). Table 2. JU2 Jumper Functions (SEL) 13) Verify that both monitors are off. The LEDs remain in SHUNT SEL PIN VGA0 CHANNEL their last position. POSITION CONNECTED TO CONNECTED TO Detailed Description of Hardware 1-2 VCC (through resistor R2) VGA2 The MAX4885E evaluation kit (EV kit) is an assembled 2-3* GND (through resistor R2) VGA1 and tested circuit board that contains all the compo- *Default position. nents necessary to evaluate the MAX4885E IC. The MAX4885E is a 1:2 switch for VGA signals. The EV kit 2 Evaluates: MAX4885E