19-0519; Rev 1; 2/07 MAX6974 Evaluation Kit The MAX6974 evaluation kit (EV kit) is an assembled and tested printed circuit board (PCB) that demonstrates the MAX6974/ MAX6975 precision current-sinking, 24-output PWM LED drivers. The MAX6974/MAX6975 functionality can be evaluated using the MAX6974 EV kit. The MAX6975 has 14-bit individual PWM and 5-bit global PWM, while the MAX6974 has 12-bit individual PWM and 7-bit global PWM. The evaluation kit comes with a MAX6974ATL+ installed. The Windows (R) 98/2000/XP software supports only the MAX6974. Features Proven PCB Layout Complete Evaluation System Convenient On-Board Test Points Fully Assembled and Tested Multiplexed 4 x 8 RGB (96 LEDs Total) 20mA LED Matrix Ordering Information PART Windows is a registered trademark of Microsoft Corp. TYPE INTERFACE REQUIREMENTS MAX6974EVKIT+ EV kit Windows PC with RS-232 serial port +Denotes a lead-free and RoHS-compliant EV kit. Component List DESIGNATION QTY C1 C2, C3 C4, C5, C25 DESCRIPTION 1 100F 20%, 10V X5R capacitor (1812) TDK C4532X5R1A107M 2 100F 20%, 6.3V X5R capacitors (1210) TDK C3225X5R0J107M 3 10F 10%, 6.3V X5R capacitors (0603) TDK C1608X5R0J106K 4 0.47F 10%, 6.3V X5R capacitors (0402) TDK C1005X5R0J474K DESIGNATION QTY DESCRIPTION JU1-JU13 13 2-pin headers JU14-JU20 7 3-pin headers P1 1 Female DB9 connector Q1-Q4 4 pnp transistors Zetex FMMTL717TA (SOT23) R1-R8 8 200 1% resistors (0603) R9-R12 4 182 1% resistors (0603) R13-R16 4 562 1% resistors (0603) 7 0.1F 10%, 6.3V X5R capacitors (0402) TDK C1005X5R0J104K R17 1 4.99k 1% resistor (0402) R18 1 9.53k 1% resistor (0402) 2 0.001F 10%, 25V X5R capacitors (0402) TDK C1005X5R1E102K R19 1 249k 1% resistor (0402) R20 1 267k 1% resistor (0402) 4 120pF 5%, 25V C0G capacitors (0402) TDK C1005C0G1E121J TP1-TP10 0 Not installed C23, C24 2 10pF 5%, 25V C0G capacitors (0402) TDK C1005C0G1E100J U1, U2 2 24-output LED drivers Maxim MAX6974ATL+ (40-pin TQFN, 6mm x 6mm EP) C26 1 0.01F 10%, 6.3V X5R capacitor (0402) TDK C1005X5R1E103K U3 1 D1-D32 32 RGB LED modules Stanley URGB1308B-10-TF Low-power microcontroller Maxim MAXQ2000-RAX+ (68-pin QFN, 10mm x 10mm EP) U4 1 Dual LVDS line driver Maxim MAX9112EKA+ (8-pin SOT23) U5 1 Dual LVDS line receiver Maxim MAX9113EKA+ (8-pin SOT23) C6-C9 C10-C16 C17, C18 C19-C22 J1 0 Not installed J2 1 2 x 5 right-angle receptacle (0.1in) J3 1 2 x 5 right-angle male header (0.1in) J4 0 Not installed ________________________________________________________________ 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: MAX6974 General Description Evaluates: MAX6974 MAX6974 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION U6 1 RS-232 transceiver Maxim MAX3311EUB+ (10-pin MAX(R)) Y1 1 20MHz crystal Citizen HCM49-20.000MABJ-UT U7, U8 2 LDO linear regulators Maxim MAX1658ESA+ (8-pin SO) Y2 1 32MHz oscillator ECS ECS-3953M-320-B-TR U9 1 LDO linear regulator Maxim MAX1659ESA+ (8-pin SO) -- 1 PCB: MAX6974 evaluation kit+ -- 20 Shunts MAX is a registered trademark of Maxim Integrated Products, Inc. Component Suppliers PHONE FAX TDK Corp. SUPPLIER 847-803-6100 847-390-4405 www.component.tdk.com WEBSITE Zetex USA 631-543-7100 631-864-7630 www.zetex.com Note: Indicate that you are using the MAX6974 when contacting these component suppliers. Quick Start Required Equipment Before you begin, you need the following equipment: * Maxim MAX6974EVKIT * DC power supply, 5VDC at 1A * Windows 98/2000/XP-compatible computer with a serial (COM) port * 9-pin I/O extension cable Procedure Do not turn on the power until all connections are complete. 1) Ensure that all jumpers JU1-JU20 are in 1-2 position (see Table 5). 2) Connect a 5VDC power source (7VDC maximum) to the board at the VLED and GND terminals. 3) Connect a cable from the computer's serial port to the EV kit. If using a 9-pin serial port, use a straightthrough, 9-pin female-to-male cable. If the only available serial port uses a 25-pin connector, a standard 25-pin-to-9-pin adapter is required. 4) Install the evaluation software on your computer by launching MAX6974.msi. (The latest software can be found on Maxim's website www.maxim-ic.com.) The program files are copied and icons are created for them in the Windows Start menu. 2 5) Turn on the power supply. None of the LEDs light up at this time. 6) Start the MAX6974 program by opening its icon in the Start menu. 7) In the Select Maxim MAX6974 Evaluation Kit Software Mode window, select Connect to EVKit on port (Autodetect). Click OK. See Figure 1. Verify that the blue M test pattern appears (test_0_blue_M.clr). 8) From the File menu, select Load Test Patterns... and then pick the file test_01_all_white.clr. Verify that all 32 RGB LEDs light up in white. 9) In the LED0 color grid, double-click one of the large round color dots in the 4 x 8 grid (or select one of the dots and click OK). The standard color selector dialog box appears. Select a color and click OK. Click Upload All to write the 4 x 8 color grid data to the board. Verify that the LEDs light up in colors corresponding to the software color grid settings. 10) Set Global Intensity to 5/63 and click Upload All. Verify that the LEDs are brighter. Detailed Description of Software The MAX6974 EV kit software controls one or more MAX6974 EV kit boards, each of which has two MAX6974s driving a 4 x 8 grid of LEDs. _______________________________________________________________________________________ MAX6974 Evaluation Kit Cascading Boards When Multiplexing is disabled, only the left half of the 4 x 8 grid is driven. See the Detailed Description of Hardware section. Two or more MAX6974 EV kit boards can be connected together in a master-slave configuration, using the master/slave connectors, J2 and J3. 1) With power off, connect the J3 pins of one board to the J2 socket of the next board. Clicking the Upload Control Command Only button writes the control command to all cascaded MAX6974s (see Figure 2). Refer to the MAX6974/MAX6975 data sheet Commands section, Table 15. 2) The board on the left is the master. On the master board, set the JU14-JU18 shunts to position 1-2. On all other boards, set the JU14-JU18 shunts to position 2-3. Individual Board Options 3) The board on the right is the last slave. On the last slave board, set the JU10-JU13 shunts closed. On all other boards, remove the JU10-JU13 shunts. The Individual Board Options controls apply to the two MAX6974s on the selected board. If using a single EV kit board, leave Select Board set at 1. See the Cascading Boards section. The Board Calibration controls determine the peak LED current for each group of output ports. Because the LEDs used on the EV kit board are only rated for 20mA, setting the calibration controls to a value greater than about 50/255 can exceed the LED's rated drive current, causing permanent damage to the LED. The 4 x 8 grid of circles inside Board LED Colors corresponds to the 4 x 8 grid of LEDs on the EV kit board. These can be individually selected by clicking them with the mouse. The Change... button chooses the color of the single selected LED. Clicking the Change All button sets all 32 LEDs to a chosen color. Upload All Clicking the Upload All button writes universal and individual board options to all cascaded MAX6974s. File-Load Test Patterns Pressing the key combination Ctrl+T brings up a convenient window containing a list of test pattern files (see Figure 3). All files whose names begin with "test_" and end with ".clr" are listed as test patterns. Click on a filename from the list, and the chroma pattern is immediately loaded. For example, test pattern test_921_ 2boards_all_white.clr loads a master and one slave board with a 4 x 16 pattern where all of the LEDs are on. The test pattern default.clr is loaded at startup. Disabling LED Multiplexing As shipped from the factory, the 4 x 8 grid of tricolor LEDs is multiplexed. To disable multiplexing, and drive only the left 4 x 4 half of the grid, two steps are necessary. First, jumpers JU1-JU6 and JU19 and JU20 must be reconfigured. See Table 5. Second, the Multiplexing must be set to Disabled in Universal Options. 4) Connect 5VDC power to the master board, between the VLED and GND pads. 5) Connect a cable from the computer's serial port to the master board. If using a 9-pin serial port, use a straight-through, 9-pin, female-to-male cable. 6) Install the evaluation software on your computer by launching MAX6974.msi. The program files are copied and icons are created for them in the Windows Start menu. 7) Turn on the power supply. None of the LEDs light up at this time. 8) Start the MAX6974 program by opening its icon in the Windows Start menu. 9) In the Select Maxim MAX6974 Evaluation Kit Software Mode window, select Connect to EVKit on port (Autodetect). See Figure 1. Click OK. 10) Set the software's Cascaded Boards to 2, 3, 4, or 5, depending on the number of boards used. 11) Set the software's Select Board to 1 to work with the master board. 12) In the Board 1 LED Colors grid, double-click one of the large round color dots in the 4 x 8 grid (or select one of the dots and click OK). The standard color selector dialog box appears. Select a color and click OK. 13) Click Upload All to write the 4 x 8 color grid data to the board. Verify that the LEDs light up in colors corresponding to the software color grid settings. 14) Set Board 1 Global Intensity to 5/63 and click Upload All. Verify that the LEDs are brighter. 15) Set the software's Select Board to 2 to work with the next board, and repeat the process of setting LED colors, global intensity, and upload all. _______________________________________________________________________________________ 3 Evaluates: MAX6974 Universal Options The Cascaded Boards control must be set to the number of boards that are connected. Evaluates: MAX6974 MAX6974 Evaluation Kit Slideshow Demo The EV kit software can load a sequence of test patterns. From the Command menu, select Slideshow, then choose a folder containing test pattern files (see Figure 4). The time between patterns can be adjusted between 50ms and 30s. Detailed Description of Hardware The MAX6974 precision current-sinking, 24-output PWM LED drivers (U1, U2) drive a 4 x 8 multiplexed grid of red-green-blue LEDs in the common-anode configuration. Common-emitter pnp BJTs (Q1-Q4) switch the LED supply voltage in the multiplexing configuration. See Tables 1 and 2. LED Power Dissipation Table 1. LED Nonmultiplexing IC/PORT LED DEVICES DRIVEN COLORS U1 port R D1 to D8 Red U1 port G D1 to D8 Green U2 port R D9 to D16 Red U2 port G D9 to D16 Green U1 port B D1 to D8 Blue U2 port B D9 to D16 Blue Table 2. LED Multiplexing IC/PORT U1 port R U1 port G U2 port R U2 port G U1 port B U2 port B LED DEVICES DRIVEN D1 to D8 D17 to D24 D1 to D8 D17 to D24 D9 to D16 D25 to D32 D9 to D16 D25 to D32 D1 to D8 D9 to D16 D17 to D24 D25 to D32 MAX6974 LED display drivers (U1, U2). A 32MHz crystal oscillator (Y2) is used to demonstrate optimum PWM frequency by driving the LVDS clock signal between command sequences. During command sequences, the MAXQ2000 bit bangs the LVDS clock at 2.8MHz. When used with the software, the MAX3311 (U6) translates the RS-232 signal levels from the COM port (P1) to logic-level signals. Resistor-dividers R17/R18 convert the 5V logic output into 3.3V logic. When JU14-JU18 are in the 2-3 position, external LVDS signals must be applied to connector J2. In this slave configuration, the MAXQ2000 (U3), MAX9112 (U4), and MAX3311 (U6) are not used. Peak LED current is set by each port's LED current calibration register. This 8-bit DAC allows peak LED current to be reduced to between 20% and 100% of the full-scale rating, 30mA. Setting the current calibration register to a value of 0 limits the peak LED current to 6mA (20% of 30mA). By writing different values to the red, green, and blue ports' current calibration registers, the display's color balance can be adjusted to compensate for LED efficacy variations. The evaluation kit is shipped from the factory with an LED type (Stanley URGB1308B) that has a maximum rating of 20mA forward current or 84mW power dissipation. COLORS Red Green Red Green Blue Blue Evaluating the MAX6975 The MAX6974 EV kit's software and firmware are only capable of driving 12-bit PWM values. If the EV kit were used to drive the MAX6975s instead, then the two least significant bits of the individual pixel PWM values are not accessible. See Tables 3 and 4. Table 3. Device Comparison-- Nonmultiplexed Operation MAX6974 MAX6975 OPERATION 7 bits 5 bits Global-intensity control PWM resolution 3 (R, G, B) 3 (R, G, B) Number of LED current calibration registers 8 bits 8 bits LED current calibration resolution User-supplied DC power between 5V and 7V, applied between the VLED and GND pads, is regulated by three MAX1658/MAX1659 low-dropout linear regulators (U7, U8, and U9) to produce 5V, 3.3V, and 2.5V supply rails. 30mA 30mA Maximum LED drive current (LED current calibration = 255) 6mA 6mA LED drive current (LED current calibration = 0) The MAXQ2000 microcontroller (U3) drives the MAX9112 LVDS level shifter (U4). When JU14-JU18 are in the 1-2 position, this microcontroller drives the 24 24 12 bits 14 bits 4 Number of pixels Individual pixel PWM-intensity-control resolution _______________________________________________________________________________________ MAX6974 Evaluation Kit Evaluates: MAX6974 Table 4. Device Comparison-- Multiplexed Operation MAX6974 MAX6975 6 bits 4 bits OPERATION Global-intensity control PWM resolution 3 (R, G, B) 3 (R, G, B) Number of LED current calibration registers 8 bits 8 bits LED current calibration resolution 30mA 30mA Maximum LED drive current (LED current calibration = 255) 6mA 6mA LED drive current (LED current calibration = 0) 48 48 12 bits 14 bits Number of pixels Individual pixel PWM-intensity-control resolution Table 5. Jumper Functions Table JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 PINS FUNCTION Closed* Enables LED multiplexing. Open Disables LED multiplexing. Closed* Enables LED multiplexing. Open Disables LED multiplexing. Closed* Enables LED multiplexing. Open Disables LED multiplexing. Closed* Enables LED multiplexing. Open Disables LED multiplexing. Closed* Enables LED multiplexing. Open Disables LED multiplexing. Closed* Enables LED multiplexing. Open Closed* Open Closed* Open Closed* Open Disables LED multiplexing. Normal operation. Force LED D1 red open fault condition. Normal operation. Force LED D1 green open fault condition. Normal operation. Force LED D1 blue open fault condition. *Default jumper setting. _______________________________________________________________________________________ 5 Evaluates: MAX6974 MAX6974 Evaluation Kit Table 5. Jumper Functions Table (continued) JUMPER JU10 JU11 JU12 JU13 JU14 PINS Closed* Open Closed* Open Closed* Open Closed* Open Not valid. Do not use. Master mode; nothing connects to J2. 2-3 Slave mode; driven by another MAX6974 EV kit connected to J2. Not valid. Do not use. 1-2* Master mode; nothing connects to J2. 2-3 Slave mode; driven by another MAX6974 EV kit connected to J2. Not valid. Do not use. 1-2* Master mode; nothing connects to J2. 2-3 Slave mode; driven by another MAX6974 EV kit connected to J2. Not valid. Do not use. 1-2* Master mode; nothing connects to J2. 2-3 Slave mode; driven by another MAX6974 EV kit connected to J2. Not valid. Do not use. 1-2* Enables LED multiplexing. 2-3 Disables LED multiplexing. Open JU20 No DOUT termination, allowing slave board to connect to J3. 1-2* Open JU19 Single board mode: R10 terminates DOUT; nothing connects to J3. Slave mode; driven by another MAX6974 EV kit connected to J2. Open JU18 No DOUT termination, allowing slave board to connect to J3. 2-3 Open JU17 No CLKO termination, allowing slave board to connect to J3. Single board mode: R10 terminates DOUT; nothing connects to J3. Master mode; nothing connects to J2. Open JU16 No CLKO termination, allowing slave board to connect to J3. Single board mode: R9 terminates CLKO; nothing connects to J3. 1-2* Open JU15 FUNCTION Single board mode: R9 terminates CLKO; nothing connects to J3. Not valid. Do not use. 1-2* Enables LED multiplexing. 2-3 Disables LED multiplexing. Open Not valid. Do not use. *Default jumper setting. 6 _______________________________________________________________________________________ MAX6974 Evaluation Kit Evaluates: MAX6974 Figure 1. Select Maxim MAX6974 EV Kit Software Mode Screenshot Figure 3. Click to Upload Color Test Pattern Screenshot Figure 4. Slideshow Screenshot Figure 2. MAX6974 EV Kit--Connected to COM1 Main Window Screenshot _______________________________________________________________________________________ 7 VLED +3.3V R2_A R1_A R0_A LOADI DIN- DIN+ CLKI- CLKI+ MUX0_A 5 2 1 11 R2 R1 R0 R3 GND LOADI DIN- DIN+ CLKI- CLKI+ MUX0 VDD 40 12 39 R4 B0 13 38 R5 B1 14 37 36 U1 35 B4 MAX6974 B3 34 R6 15 R7 16 G0 17 G3 SET U7 GND 4 IN IN IN C2 100F MAX1658 OUT +3.3V OUT SHDN 8 6 3 7 VLED +2.5V R19 249k 1% R20 267k 1% VLED 20 G4 5 2 1 +3.3V C6 0.47F U8 GND 8 21 22 23 4 C3 100F IN IN IN VLED 6 3 7 C1 100F G5_A G6_A G7_A VLED R0_B VLED R1_B R2_B +5V 1 5 2 R3 U9 GND 8 11 R2 R1 R0 GND LOADI DIN- DIN+ CLKI- CLKI+ MUX0 VDD 40 4 12 39 R4 B0 IN IN IN C25 10F MAX1659 OUT +5V OUT SHDN SET 10 9 8 7 6 25 24 5 26 4 2 27 R6 200 1% MUX0_B 1 C9 0.47F 3 R5 200 1% MUX1_A C5 10F 28 29 30 MAX1658 OUT +2.5V OUT SHDN SET GND G5 G6 G7 VDD LOADO DOUT- DOUT+ CLKO- CLKO+ MUX1 GND *31 VLED 5.55V 19 G2 G1 18 B7 32 B6 33 B5 EXPOSED PADDLE TO GND B2 *PIN 31 OF MAX6974 SHOULD BE ROUTED TO GROUND SEPARATELY. 10 9 8 7 6 5 4 3 2 1 R3_A B2_A R6_A B0_A R4_A B5_A G1_A B1_A R5_A B3_A R7_A B6_A G2_A B4_A G0_A B7_A G3_A C7 0.47F G4_A C4 10F +3.3V R3_B B0_B R4_B 6 3 7 13 38 R5 B1 14 37 36 U2 35 B4 MAX6974 B3 B4_B 34 R6 R7 VLED 15 16 G0 17 B7 G3 G2 G1 19 32 B6 18 33 B5 EXPOSED PADDLE TO GND B2 B5_B DOUT CLKO C10 0.1F G1_B B1_B R5_B B2_B R6_B B6_B G2_B B3_B R7_B B7_B 4 3 G4 OUT2 OUT1 C17 0.001F 20 G5 G6 G7 VDD LOADO DOUT- DOUT+ CLKO- CLKO+ MUX1 GND *31 +3.3V G3_B +3.3V G4_B 8 G0_B TP6 2 GND IN2- IN2+ IN1+ IN1- TP10 TP9 TP8 TP7 MAX9113 U5 VCC 1 21 22 23 24 25 26 27 28 29 30 5 6 7 8 G5_B G6_B G7_B LOADO DOUT- DOUT+ CLKO- CLKO+ JU13 R8 200 1% JU12 CLKO+ JU10 JU11 C8 0.47F R7 200 1% +3.3V MUX1_B DOUT- DOUT+ LOADO VLED CLKO- J3-9 J3-7 J3-5 J3-3 J3-1 J3-8 J3-6 J3-4 J3-2 J3-10 J3 VLED N.C. Evaluates: MAX6974 MAX6974 Evaluation Kit Figure 5a. MAX6974 EV Kit Schematic (Sheet 1 of 5) _______________________________________________________________________________________ OSC_EN 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 18 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 67 23 SEG10 SEG28 21 SEG9 SEG29 20 SEG8 SEG30 63 SEG7 SEG31 19 22 64 SEG6 SEG32 65 SEG5 SEG33 66 24 62 60 MAXQ2000 U3 59 58 25 +3.3V 26 27 C13 0.1F 28 EXPOSED PADDLE UNCONNECTED 61 57 56 55 54 53 29 30 31 32 N.C. 33 SEG0 GND Y2 34 52 GND VADJ TCK 68 SEG4 SEG34 2 VLCD2 TDI DOUT SEG3 SEG35 TRI VLCD1 TMS LOADO SEG2 COM0 3 4 J1-7 J1-1 J1-10 J1-2 J1-6 J1-8 J1-5 J1-9 J1-4 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 TXO RXO +3.3V J1-3 J1 32KOUT RX1 TX1 SS MOSI SCLK MISO GND T1B T1 T2B T2 T0B T0 VDD HFXOUT HFXIN OUT VCC TXO 1 VLCD TDO CLKO SEG1 VDDIO OSC_EN RXO RESET C23 10pF C11 0.1F C12 0.1F +2.5V Y1 C24 10pF N.C. +3.3V C26 0.01F DIN2 DIN1 RXO TXO 3 1 U4 VCC 4 R18 9.53k 1% 2 GND DO2- DO2+ DO1+ DO1- C14 0.1F MAX9112 C18 0.001F +3.3V R17 4.99k 1% +5V 5 6 7 8 5 4 3 1 2 1 U6 3 JU18 1 3 JU17 1 3 JU16 1 3 JU15 C15 0.1F V- 2 2 2 2 2 9 RIN TOUT GND C1+ MAX3311 C1- ROUT TIN SHDN VCC R4 200 1% R3 200 1% 1 3 6 7 10 8 C16 0.1F DIN- CLKI+ N.C. N.C. VLED N.C. TP5 TP4 TP2 TP3 TP1 J2-3 P1-5 P1-4 P1-3 P1-2 P1-9 P1-8 P1-7 P1-6 J2-9 J2-10 P1-1 J2-7 J2-8 J2-5 J2-4 J2-6 J2-1 J2-2 P1 J2 R2 200 1% R1 200 1% DIN- DIN+ N.C. N.C. N.C. N.C. VLED CLKI+ CLKI- LOADI Evaluates: MAX6974 32KIN JU14 MAX6974 Evaluation Kit Figure 5b. MAX6974 EV Kit Schematic (Sheet 2 of 5) _______________________________________________________________________________________ 9 10 Figure 5c. MAX6974 EV Kit Schematic (Sheet 3 of 5) ______________________________________________________________________________________ PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A JU9 JU8 JU7 D6-C D6-B D6-A D5-C D5-B D5-A D4-C D4-B D4-A D3-C D3-B D3-A D2-C D2-B D2-A D1-C D1-B D1-A PB5_A PG5_A PR5_A PB4_A PG4_A PR4_A PB3_A PG3_A PR3_A PB2_A PG2_A PR2_A PB1_A PG1_A PR1_A PB0_A PG0_A PR0_A PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A PVMUX0_A D12-C D12-B D12-A D11-C D11-B D11-A D10-C D10-B D10-A D9-C D9-B D9-A D8-C D8-B D8-A D7-C D7-B D7-A PB3_B PG3_B PR3_B PB2_B PG2_B PR2_B PB1_B PG1_B PR1_B PB0_B PG0_B PR0_B PB7_A PG7_A PR7_A PB6_A PG6_B PR6_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B PVMUX0_B D18-C D18-B D18-A D17-C D17-B D17-A D16-C D16-B D16-A D15-C D15-B D15-A D14-C D14-B D14-A D13-C D13-B D13-A PB1_A PG1_A PR1_A PB0_A PG0_A PR0_A PB7_B PG7_B PR7_B PB6_B PG6_B PR6_B PB5_B PG5_B PR5_B PB4_B PG4_B PR4_B PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A PVMUX1_A D23-C D23-B D23-A D22-C D22-B D22-A D21-C D21-B D21-A D20-C D20-B D20-A D19-C D19-B D19-A PB6_A PG6_A PR6_A PB5_A PG5_A PR5_A PB4_A PG4_A PR4_A PB3_A PG3_A PR3_A PB2_A PG2_A PR2_A PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_A PVMUX1_A PVMUX1_A D27-C D27-B D27-A D26-C D26-B D26-A D25-C D25-B D25-A D24-C D24-B D24-A PB2_B PG2_B PR2_B PB1_B PG1_B PR1_B PB0_B PG0_B PR0_B PB7_A PG7_A PR7_A Evaluates: MAX6974 MAX6974 Evaluation Kit PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B PVMUX1_B D32-C D32-B D32-A D31-C D31-B D31-A D30-C D30-B D30-A D29-C D29-B D29-A D28-C D28-B D28-A PB7_B PG7_B PR7_B PB6_B PG6_B PR6_B PB5_B PG5_B PR5_B PB4_B PG4_B PR4_B PB3_B PG3_B PR3_B VLED MUX1_A MUXO_A JU5 JU3 R11 182 1% JU1 R9 182 1% C21 120pF 2 C19 120pF 2 1 2 1 1 Q3 Q1 JU19 R15 562 1% R13 562 1% 3 3 3 VMUX1_A VMUXO_A MUX1_B MUXO_B JU6 JU4 R12 182 1% JU2 R10 182 1% C22 120pF 2 C20 120pF 2 1 1 1 Q4 Q2 R14 562 1% 3 R16 562 1% 2 JU20 3 3 VMUX1_B VMUXO_B Evaluates: MAX6974 PVMUX1_B MAX6974 Evaluation Kit Figure 5d. MAX6974 EV Kit Schematic (Sheet 4 of 5) ______________________________________________________________________________________ 11 12 PRO_A PR1_A PR5_A PR6_A J4-6 J4-8 J4-10 J4-12 J4-14 J4-16 J4-18 J4-20 J4-22 J4-24 J4-26 J4-28 J4-5 J4-7 J4-9 J4-11 J4-13 J4-15 J4-17 J4-19 J4-21 J4-23 J4-25 J4-27 VMUX0_A VMUX0_B VMUX1_A VMUX1_B R0_A R1_A R2_A R3_A R4_A R5_A Figure 5e. MAX6974 EV Kit Schematic (Sheet 5 of 5) ______________________________________________________________________________________ PG1_A PG5_A PG6_A J4-34 J4-36 J4-38 J4-40 J4-42 J4-44 J4-46 J4-48 J4-33 J4-35 J4-37 J4-39 J4-41 J4-43 J4-45 J4-47 G0_A G1_A G2_A G3_A G4_A G5_A G6_A G7_A (ODD PINS CONNECT TO EVEN PINS ON TOP OF PCB) PGO_A J4-32 R7_A PG7_A PG4_A PG3_A PG2_A PR7_A J4-30 J4-29 J4-31 R6_A PR4_A PR3_A PR2_A PVMUX1_B PVMUX1_A PVMUX0_B J4-4 J4-3 PVMUX0_A J4-2 J4-1 J4 J4-79 J4-77 J4-75 J4-73 J4-71 J4-69 J4-67 J4-65 J4-63 J4-61 J4-59 J4-57 J4-55 J4-53 J4-51 J4-49 J4-80 J4-78 J4-76 J4-74 J4-72 J4-70 J4-68 J4-66 J4-64 J4-62 J4-60 J4-58 J4-56 J4-54 J4-52 J4-50 (ODD PINS CONNECT TO EVEN PINS ON TOP OF PCB) R7_B R6_B R5_B R4_B R3_B R2_B R1_B R0_B B7_A B6_A B5_A B4_A B3_A B2_A B1_A B0_A J4 PR7_B PR6_B PR5_B PR4_B PR3_B PR2_B PR1_B PRO_B PB7_A PB6_A PB5_A PB4_A PB3_A PB2_A PB1_A PBO_A J4-111 J4-109 J4-107 J4-105 J4-103 J4-101 J4-99 J4-97 J4-95 J4-93 J4-91 J4-89 J4-87 J4-85 J4-83 J4-81 J4-112 J4-110 J4-108 J4-106 J4-104 J4-102 J4-100 J4-98 J4-96 J4-94 J4-92 J4-90 J4-88 J4-86 J4-84 J4-82 (ODD PINS CONNECT TO EVEN PINS ON TOP OF PCB) B7_B B6_B B5_B B4_B B3_B B2_B B1_B B0_B G7_B G6_B G5_B G4_B G3_B G2_B G1_B G0_B J4 PB7_B PB6_B PB5_B PB4_B PB3_B PB2_B PB1_B PBO_B PG7_B PG6_B PG5_B PG4_B PG3_B PG2_B PG1_B PGO_B Evaluates: MAX6974 MAX6974 Evaluation Kit MAX6974 Evaluation Kit Evaluates: MAX6974 Figure 6. MAX6974 EV Kit Component Placement Guide--Component Side ______________________________________________________________________________________ 13 Evaluates: MAX6974 MAX6974 Evaluation Kit Figure 7. MAX6974 EV Kit PCB Layout--Component Side 14 ______________________________________________________________________________________ MAX6974 Evaluation Kit Evaluates: MAX6974 Figure 8. MAX6974 EV Kit PCB Layout--Ground Layer 2 ______________________________________________________________________________________ 15 Evaluates: MAX6974 MAX6974 Evaluation Kit Figure 9. MAX6974 EV Kit PCB Layout--Signal Layer 3 16 ______________________________________________________________________________________ MAX6974 Evaluation Kit Evaluates: MAX6974 Figure 10. MAX6974 EV Kit PCB Layout--Solder Side Revision History Pages changed at Rev 1: 1, 2, 8-12, 14-17 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 (c) 2007 Maxim Integrated Products Springer is a registered trademark of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX6974EVKIT+