MAX9867 MAX9867EVKIT GRM155R61A104K BLM18PG600SN1 GRM155R60J105K GRM155R60J225M - Datasheet Archive
MAX9867 Evaluation Kit Features The MAX9867 evaluation kit (EV kit) consists of a MAX9867 evaluation board and software. The EV
19-5085; Rev 0; 12/09 MAX9867 MAX9867 Evaluation Kit Features The MAX9867 MAX9867 evaluation kit (EV kit) consists of a MAX9867 MAX9867 evaluation board and software. The EV kit is a fully assembled and tested circuit board that evaluates the MAX9867 MAX9867 low-power, stereo audio codec. The EV kit is designed to send and receive digital audio data in the Sony/Philips digital interface (S/PDIF) format and can be optionally configured to communicate using generic digital audio or I2S-compatible signals. S USB-PC Connection (Cable Included) The EV kit provides two RCA jacks for analog audio input signals and two 3.5mm headphone jacks for analog audio output signals. The EV kit also provides fiber optic receiving and transmitting modules for digital audio input and output. S Isolation Header for Direct Communication with WindowsM XPM-, The EV kit includes 2000-, Windows and Windows VistaM-compatible software that provides a graphical user interface (GUI) for exercising the features of the MAX9867 MAX9867. The EV kit is connected to a PC through a USB A-to-mini-B cable. S USB Powered (External Power Supply Not Required) S On-Board 12.288MHz and 13MHz Clock Oscillators S On-Board Digital Audio Interface Transceiver S On-Board Fiber Optic Transmitter and Receiver Modules the MAX9867 MAX9867 I2C and Digital Audio Interfaces S Proven PCB Layout S Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Software Ordering Information PART TYPE MAX9867EVKIT MAX9867EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. System Diagram SOFTWARE REQUIRED USB CABLE S PC WINDOW EV KIT ANALOG INPUTS S/PDIF DIGITAL INPUTS AND OUTPUTS Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp. _ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. Evaluates: MAX9867 MAX9867 General Description Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY C55, C56 2 0.1FF Q10%, 10V X5R ceramic capacitors (0402) Murata GRM155R61A104K GRM155R61A104K C57C61 0 Not installed, ceramic capacitors (0402) D1 1 Surface-mount yellow LED (0603) D2 1 Surface-mount red LED (0603) FB1, FB2 2 0.1I DCR, 60I at 100MHz ferrite beads Murata BLM18PG600SN1 BLM18PG600SN1 J1 1 White phono jack (side entry, PCB mount) J2 1 Red phono jack (side entry, PCB mount) J3, J4 2 Surface-mount 3.5mm stereo headphone jacks J5 1 Digital audio fiber optic transmitter module Toshiba TOTX147L(F,T) J6 1 Digital audio fiber optic receiver module Toshiba TORX147L(F,T) REQUIRED COMPONENTS C1C8, C10, C12, C13, C16, C17 13 C9 1 1.0FF Q10%, 6.3V X5R ceramic capacitors (0402) Murata GRM155R60J105K GRM155R60J105K 2.2FF Q20%, 6.3V X5R ceramic capacitor (0402) Murata GRM155R60J225M GRM155R60J225M SUPPORT COMPONENTS C11, C18 2 220FF 220FF Q20%, 4V tantalum capacitors (1206) Nichicon F950G227MSAAQ2 F950G227MSAAQ2 C14, C15 2 1.0FF Q10%, 6.3V X5R ceramic capacitors (0402) Murata GRM155R60J105K GRM155R60J105K C19, C20, C31 C34, C37, C38 C21, C22, C27, C29, C35, C40, C42, C44C47, C51 C23C26, C43, C50, C53, C54 C28 C30 C36, C41 C39 C48, C49 C52 8 0.01FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C103K GRM188R71C103K 12 0.1FF Q10%, 16V X5R ceramic capacitors (0603) Murata GRM188R61C104K GRM188R61C104K DESCRIPTION 8 1FF Q10%, 10V X5R ceramic capacitors (0603) Murata GRM188R61A105K GRM188R61A105K J7 1 Mini-B USB jack 1 0.047FF 047FF Q10%, 16V X7R ceramic capacitor (0603) Murata GRM188R71C473K GRM188R71C473K JU1JU11, JU14JU18 16 2-pin headers JU12 1 3-pin header 0.47FF Q10%, 16V X7R ceramic capacitor (0603) Murata GRM188R71C474K GRM188R71C474K JU13 1 21-pin header (3 x 7) L1 1 47FH Q5%, 200mA inductor (1812) Coilcraft 1812LS-473XJLB 1812LS-473XJLB 1 2 10pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J GRM1885C1H100J 1 0.033FF 033FF Q10%, 16V X7R ceramic capacitor (0603) Murata GRM188R71C333K GRM188R71C333K 2 22pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J GRM1885C1H220J 1 10FF Q10%, 6.3V X5R ceramic capacitor (0805) Murata GRM219R60J106K GRM219R60J106K R1R4 4 2.2kI Q5% resistors (0402) R5, R6, R8 3 10kI Q5% resistors (0402) R7, R11, R15, R16, R29 0 Not installed, resistors (0402) R9, R10, R12, R13, R14 5 75I Q5% resistors (0402) R17 1 402I Q5% resistor (0603) R18 1 47kI Q5% resistor (0603) R19, R20 2 220I Q5% resistors (0603) R21, R22, R23 3 1.5kI Q5% resistors (0603) R24, R25 2 27I Q5% resistors (0603) 2 _ MAX9867 MAX9867 Evaluation Kit DESIGNATION QTY R26 1 470I Q5% resistor (0603) R27 1 2.2kI Q5% resistor (0603) R28 1 10kI Q5% resistor (0603) R30 1 0I Q5% resistor (0402) U1 1 Stereo audio codec (30 WLP) Maxim MAX9867EWV MAX9867EWV+ 2 Low-noise linear regulators (5 SC70) Maxim MAX8510EXK18 MAX8510EXK18+ U2, U3 DESCRIPTION 1 U5, U6 1 U11 1 Low-noise linear regulator (5 SC70) Maxim MAX8511EXK25 MAX8511EXK25+ U12, U13 2 Digital microphones (6 LGA) Akustika AKU2002C AKU2002C Y1 1 12.288MHz clock oscillator Y2 1 13MHz clock oscillator Hong Kong X'tals C4M13000NSMI02601-0 C4M13000NSMI02601-0 Y3 1 16MHz surface-mount crystal oscillator Y5 1 6MHz surface-mount crystal oscillator - 1 USB high-speed A-to-mini-B cable, 6ft - 24 Shunts - 1 PCB: MAX9867 MAX9867 EVALUATION KIT+ USB-to-UART converter (32 TQFP) U8 1 Microcontroller (56 TQFN-EP*) Maxim MAXQ2000-RBX MAXQ2000-RBX+ U9 1 Low-noise linear regulator (5 SC70) Maxim MAX8511EXK33 MAX8511EXK33+ DESCRIPTION U10 2:1 high-speed muxes (6 SC70) 1 U7 QTY 93C46 93C46 type 3-wire EEPROM (8 SO) Digital audio transceiver (28 SO) Cirrus Logic CS8427-CSZ CS8427-CSZ 2 U4 DESIGNATION *EP = Exposed pad. Component Suppliers SUPPLIER PHONE WEBSITE Coilcraft, Inc. 847-639-6400 www.coilcraft.com Hong Kong X'tals Ltd. 852-35112388 www.hongkongcrystal.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com Toshiba America Electronic Components, Inc. 949-623-2900 www.toshiba.com/taec Note: Indicate that you are using the MAX9867 MAX9867 when contacting these component suppliers. MAX9867 MAX9867 EV Kit Files FILE DESCRIPTION INSTALL.EXE Installs the EV kit files on your computer MAX9867 MAX9867.EXE Application program FTDIBUS.INF USB device driver file UNINST.EXE Uninstalls the EV kit software USB_Driver_Help.PDF USB driver installation help file _ 3 Evaluates: MAX9867 MAX9867 Component List (continued) Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Quick Start Recommended Equipment · MAX9867 MAX9867 EV kit (USB A-to-mini-B cable included) · User-supplied Windows 2000, Windows XP, or Windows Vista PC with a spare USB port · Pair of headphones (16I or greater) · Two single-ended analog audio sources · Digital audio equipment with two TOSLINK optical cables Refer to the MAX9867 MAX9867 IC data sheet while using this EV kit for detailed descriptions of the codec's features. Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. Procedure The MAX9867 MAX9867 EV kit is fully assembled and tested. Follow the steps below to verify board operation before exercising the full features of the MAX9867 MAX9867: 1) Verify that all the jumpers are set in their default positions, as shown in Table 1. 2) Connect one TOSLINK optical cable between the digital audio equipment input and the J5 module on the EV kit board. 3) Connect the other TOSLINK optical cable between the digital audio equipment output and the J6 module on the EV kit board. 4) Connect one analog audio source to the MICLP and MICLN pads on the EV kit board. Connect the MICLN pad to GND for single-ended microphone input. 5) Connect the other analog audio source to the MICRP and MICRN pads on the EV kit board. Connect the MICRN to GND for single-ended microphone input. 6) Connect one analog audio source to the J1 RCA jack on the EV kit board. 7) Connect the other analog audio source to the J2 RCA jack on the EV kit board. 8) Connect the headphone to the J4 headphone jack on the EV kit board. 9) Set the digital audio equipment audio output and input sampling frequency to 48kHz. 10) Enable the digital audio equipment input and output. 11) Enable the analog audio sources. 12) Visit www.maxim-ic.com/evkitsoftware to download the latest version of the EV kit software, 9867Rxx.ZIP. 13) Install the MAX9867 MAX9867 evaluation software on your computer by running the INSTALL.EXE program. The program files are copied and icons are created in the Windows Start menu. 14) Connect the USB cable from the PC to the EV kit board. A New Hardware Found window pops up when installing the USB driver for the first time. If a window is not seen that is similar to the one described above after 30s, remove the USB cable from the board and reconnect it. Administrator privileges are required to install the USB device driver on Windows. 15) Follow the directions of the Found New Hardware window to install the USB device driver. Manually specify the location of the device driver to be C:\Program Files\MAX9867 MAX9867 (default installation directory) using the Browse button. During device driver installation, Windows may show a warning message indicating that the device driver Maxim uses does not contain a digital signature. This is not an error condition and it is safe to proceed with installation. Refer to the USB_Driver_Help.PDF document included with the software for additional information. 16) Start the MAX9867 MAX9867 EV kit software by opening its icon in the Start | Programs menu. 17) The EV kit software main window appears, as shown in Figure 1. Verify that the message MAX9867 MAX9867: Connected is displayed on the status bar at the bottom of the software's main window. 18) In the Clock Configuration group box, press the Configure button. 19) In the MCLK Sources group box, click on the Recovered Master Clock radio button. 20) Click on the DAC and Headphone Outputs tab. In the Headphone Output Mode drop-down list, select Stereo OCL. 21) Click on the Mic and Line Inputs tab. In the Line Inputs group box, check the Enable Left Line In, Enable Right Line In, Mute Left Line In, and Mute Right Line In checkboxes. Muting the input does not prevent the input from routing to the ADCs. 22) Click on the Filters tab. In the Codec Filtering Mode drop-down list, select Audio (FIR). 4 _ MAX9867 MAX9867 Evaluation Kit and the software application. The drop-down list allows a user to enable or disable the MAX9867 MAX9867. 24) Verify that audio from the digital audio equipment is output at the headphone and the analog audio sources are output to the digital audio equipment. The Device Status group box reports the status of various device functions. Check/uncheck the checkboxes to enable/disable the hardware interrupts for each status flag. Detailed Description of Software Software Main Window On the top of the main window, press the Read All button to read all the MAX9867 MAX9867 register values and update the GUI. Press Reset to reset the EV kit hardware. Press Connected to set up the connection between the EV kit The lower side of the main window includes eight tabs. On each tab sheet, the user can exercise a group of related configurations and check the register values. Each control on the GUI generates the expected read and/or write operations on the internal registers of the MAX9867 MAX9867 and the CS8427 CS8427 digital audio transceiver. Figure 1. MAX9867 MAX9867 Evaluation Software (Main Window) _ 5 Evaluates: MAX9867 MAX9867 23) On the top-right corner of the software's main window, select Enabled from the drop-down list. Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit File Menu Select the Save Configuration menu item to save the current EV kit configuration to a text file that can be loaded at a later time. Select Load Configuration to reload settings from a saved file. Select Exit to exit the application. View Menu Select the Show Test Mode Registers menu item to display or hide the MAX9867 MAX9867 trim registers and test registers tab sheets. Select Show CS8427 CS8427 Registers to display or hide the CS8427 CS8427 tab to change the digital audio transceiver registers. Options Menu Select the Power On Reset menu item to reset the MAX9867 MAX9867 to its power-on state. Select Read Status to read the MAX9867 MAX9867 status registers. Select Auto Read Status to enable the automatic read of the MAX9867 MAX9867 status registers. Select Auto Connect to automatically set up the connection between the EV kit and the software application in case the connection is lost. Tools Menu Select the Reconnect to EVKIT menu item to set up the connection between the EV kit and the software application. Select Debug Mode to bring up the Maxim Command Module Interface window. The interface allows I2C operations, such as read byte and write byte, to be executed. Uncheck the Auto Read Status menu item before using the command module interface. The I2C dialog boxes accept numeric data in binary, decimal, or hexadecimal. Hexadecimal numbers should be prefixed by $ or 0x. Binary numbers must be exactly eight digits. See Figure 2 for an example of this control method. Help Menu Select the Help menu item for information about the software. Clock and Digital Audio Tab The Clock and Digital Audio tab sheet (Figure 1) contains the master clock (MCLK) and digital audio interface selections for the MAX9867 MAX9867. A user can select an automatic typical interface configuration or manually configure the device according to specific requirements. DAC and Headphone Outputs Tab The DAC and Headphone Outputs tab sheet (Figure 3) includes the DAC enable and gain controls. It also includes the headphone output mute, level, and mode controls. AUX and Jacksense Tab The AUX and Jacksense tab sheet (Figure 4) includes the measurement control of an AUX input. It also includes the jack detection controls. Do not use the DC-voltage measurement and jack detection at the same time. Mic and Line Inputs Tab The Mic and Line Inputs tab sheet (Figure 5) includes the microphone and the line input controls. ADC and Sidetone Tab The ADC and Sidetone tab sheet (Figure 6) includes the controls for the ADC and the sidetone circuitry on the MAX9867 MAX9867. Filters Tab The Filters tab sheet (Figure 7) controls the functionality of the DAC and ADC filters on the MAX9867 MAX9867. Registers 1 and Registers 2 Tabs The Registers 1 tab sheet (Figure 8) and the Registers 2 tab sheet (Figure 9) list all of the MAX9867 MAX9867 registers. To change a register value, type in the new value in the appropriate edit box and press the Enter key on the keyboard, or click the bit names on the GUI. CS8427 CS8427 Tab The CS8427 CS8427 tab sheet (Figure 10) displays the EV kitrelated CS8427 CS8427 register values on one page. To change a register value, type in the new value in the appropriate edit box and press the Enter key on the keyboard, or click the bit names on the GUI. 6 _ MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 2. MAX9867 MAX9867 Evaluation Software (Maxim Command Module Interface) _ 7 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 3. MAX9867 MAX9867 Evaluation Software (DAC and Headphone Outputs Tab) 8 _ MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 4. MAX9867 MAX9867 Evaluation Software (AUX and Jacksense Tab) _ 9 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 5. MAX9867 MAX9867 Evaluation Software (Mic and Line Inputs Tab) 10 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 6. MAX9867 MAX9867 Evaluation Software (ADC and Sidetone Tab) _ 11 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 7. MAX9867 MAX9867 Evaluation Software (Filters Tab) 12 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 8. MAX9867 MAX9867 Evaluation Software (Registers 1 Tab) _ 13 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 9. MAX9867 MAX9867 Evaluation Software (Registers 2 Tab) 14 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 10. MAX9867 MAX9867 Evaluation Software (CS8427 CS8427 Tab) _ 15 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Detailed Description of Hardware The MAX9867 MAX9867 EV kit is a complete digital audio evaluation system for the MAX9867 MAX9867 low-power, stereo audio codec. The EV kit provides translation between the digital audio signals and optical S/PDIF signals to allow easy connection with consumer electronics devices. See Table 1 for a description of all EV kit jumper configurations. Clocking On-Board Clock The EV kit has one 12.288MHz and one 13MHz clock oscillator on the board to provide flexible master-clock selections for the MAX9867 MAX9867. Recovered Clock When the S/PDIF IN has a digital audio input and the S/PDIF transceiver is in operation, the recovered clock from the S/PDIF transceiver can be used as the master clock for the MAX9867 MAX9867. External Clocks Connect an external clock source to jumper JU12 pin 2 to drive the MAX9867 MAX9867 MCLK pin without using the onboard oscillator. The user must type in the correct clock frequency in the MCLK Frequency edit box. Jack Detection and DC-Voltage Measurement The MAX9867 MAX9867 has a JACKSNS/AUX pin that can be configured to either detect the presence/absence of a jack or accurately measure a DC voltage. To measure a DC voltage, place a shunt on jumper JU7 and apply the DC voltage on the AUX pad. The on-board resistor network (R5, R6) can be used to adjust the input voltage ranges. To detect the presence or absence of a jack, remove the shunt on jumper JU7 and connect the JACKSNS pad to a proper jack pin. Refer to the MAX9867 MAX9867 IC data sheet for the details of jack-detection functionality. Microphone Inputs The MAX9867 MAX9867 features stereo differential microphone inputs that can be connected to either analog or digital microphones. MICRP and MICRN pins can only connect to an analog microphone. Place shunts on jumpers JU1 and JU3 to use the MAX9867 MAX9867 MICBIAS for microphone biasing. Place a shunt on jumper JU2 to connect MICRN to GND for single-ended microphone input. MICLP/DIGMICDATA and MICLN/DIGMICCLK pins can connect either to an analog microphone or a digital microphone, but not at the same time. For analog microphone input, remove the shunts on jumpers JU8 and JU9. Place shunts on jumpers JU4 and JU6 to use the MAX9867 MAX9867 MICBIAS for microphone biasing. Place a shunt on jumper JU2 to connect MICLN to GND for single-ended microphone input. For digital microphone input, place shunts on JU8 and JU9 and remove connections on the MICLP and MICLN pads. There are two digital microphones on the EV kit board. Headphone Outputs There are two headphone jacks on the EV kit board. Use J4 for differential or capacitorless output configuration. Remove the shunts on jumpers JU10 and JU11. Use J5 for single-ended output configuration. Remove the shunts on jumpers JU10 and JU11 for fast turn-on mode. Place the shunts on JU10 and JU11 for clickless mode. 16 MAX9867 MAX9867 Evaluation Kit JUMPER JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8, JU9 JU10 JU11 JU12, JU13 JU14 JU15 JU16 JU17 JU18 SHUNT POSITON Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 Open* 1-2 2-3* (all rows) Open 1-2* Open 1-2* Open 1-2* Open DESCRIPTION MICRN disconnected from GND MICRN connected to GND through a 2.2kI resistor MICRN disconnected from GND MICRN connected to GND MICRP disconnected from MICBIAS MICRP connected to MICBIAS through a 2.2kI resistor MICLP disconnected from MICBIAS MICLP connected to MICBIAS through a 2.2kI resistor MICLN disconnected from GND MICLN connected to GND MICLN disconnected from GND MICLN connected to GND through a 2.2kI resistor JACKSNS/AUX used for jack detection JACKSNS/AUX used for AUX DC measurement MICLP/MICLN disconnected from digital microphone MICLP/MICLN connected to digital microphone ROUTN connected to GND through a 1FF capacitor ROUTN disconnected from GND LOUTN connected to GND through a 1FF capacitor LOUTN disconnected from GND MAX9867 MAX9867 connected to on-board I2S and I2C interfaces MAX9867 MAX9867 I2S and I2C interfaces available for user-supplied equipment MAX9867 MAX9867 DVDD connected to on-board 1.8V supply MAX9867 MAX9867 DVDD applied externally on DVDD pad MAX9867 MAX9867 AVDD connected to on-board 1.8V supply MAX9867 MAX9867 AVDD applied externally on AVDD pad MAX9867 MAX9867 PDD connected to on-board 1.8V supply MAX9867 MAX9867 PVDD applied externally on PVDD pad 1-2* MAX9867 MAX9867 DVDDIO connected to on-board 3.3V supply Open MAX9867 MAX9867 DVDDIO applied externally on DVDDIO pad 1-2* Open CS8427 CS8427 powered by 5V USB supply CS8427 CS8427 powered by external supply on CS8427 CS8427_5V pad *Default position. _ 17 Evaluates: MAX9867 MAX9867 Table 1. Jumper Descriptions (JU1JU18) Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 11a. MAX9867 MAX9867 EV Kit Schematic (Sheet 1 of 4) 18 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 11b. MAX9867 MAX9867 EV Kit Schematic (Sheet 2 of 4) _ 19 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 11c. MAX9867 MAX9867 EV Kit Schematic (Sheet 3 of 4) 20 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 11d. MAX9867 MAX9867 EV Kit Schematic (Sheet 4 of 4) _ 21 Evaluates: MAX9867 MAX9867 MAX9867 MAX9867 Evaluation Kit Figure 12. MAX9867 MAX9867 EV Kit Component Placement Guide- Component Side Figure 14. MAX9867 MAX9867 EV Kit PCB Layout-Inner Layer 2 Figure 13. MAX9867 MAX9867 EV Kit PCB Layout-Component Side Figure 15. MAX9867 MAX9867 EV Kit PCB Layout-Inner Layer 3 22 MAX9867 MAX9867 Evaluation Kit Evaluates: MAX9867 MAX9867 Figure 16. MAX9867 MAX9867 EV Kit PCB Layout-Inner Layer 4 Figure 17. MAX9867 MAX9867 EV Kit PCB Layout-Inner Layer 5 Figure 18. MAX9867 MAX9867 EV Kit PCB 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products 23 Maxim is a registered trademark of Maxim Integrated Products, Inc.