Data Sheet - Mouser Electronics
Contents
1. Audio Outputs The evaluation board has a standard headphone jack J11 connected to the COM and COM pins A headphone with a 3 5mm audio jack can be plugged into the evaluation board Note that in a typical application the USB and audio connections use a common connector This evaluation board has separate connectors for USB and audio for simplicity in evaluating the performance of USB and audio signals However for optimal USB 2 0 HS performance the headphone jack can be disconnected from the COM COM path This can be done by depopulating resistors Rg and R7 on the evaluation board USB Connections A type A USB receptacle J 4 and a type B USB receptacle J5 is located on the left side of the board The type B receptacle should be connected using a standard USB cable to the upstream USB host controller which is usually a PC computer or hub A USB device can be plugged directly into this receptacle When this connection is made and the IN logic control is driven HIGH the ISL54409 1SL54410 device will go into USB mode The switches will be turned OFF and the USB Host and USB device can communicate Note Before operating in the USB mode the headphones must be removed from the headphone speaker jack This will prevent the audio load from interfering with USB signal transmission The main purpose of the 1SL54409 1SL54410 IC is to allow the use of a common USB and Audio Headphone Connector in Personal Media Players and ot2. I c1 ooo Wy kd e J8 4 7UF 4 gs CTRL c2 r225 e fete 0 1UF R2 ow c3 IM Lb e STO OFF 0 01UF lt x 2O Stn i 1 oN Z pp 1 ul 7 By ed 1 7 WV e A 2 se x a COM UTQFN10 5 3 R9 LA S N J3 r as ct a IN 52 COM M E ea 44 il z R10 k NP Rit ainn DNP e S 4 Zv R6 oe e w 0 Ww R7 hd ANV 0 a La sS os ESG Sh bg y a toes A e of oy od a 7 21 T A Vv v7 5 s 5 e 4 s l S USB 5 L 4i vam en 7 5 es7 43 004 90 000 k 4 5 J4 J5 o e v zZ Intersil Corporation reserves the right to make changes in circuit design software and or specifications at any time without notice Accordingly the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding For information regarding Intersil Corporation and its products see www intersil com 4 intersil AN1501 0 lt October 8 2009 Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery amp Lifecycle Information Intersil ISL54410EVAL1Z
3. ces are sensitive to electrostatic discharge follow proper IC Handling Procedures 1 888 INTERSIL or 1 888 468 3774 Intersil and design is a registered trademark of Intersil Americas Inc Copyright Intersil Americas Inc 2009 All Rights Reserved All other trademarks mentioned are the property of their respective owners Application Note 1501 Power Supply The DC power supply connected at banana jacks J1 VCC and J2 GND provides power to the evaluation board The IC requires a 2 7V to 5 0V DC power supply for proper operation The power supply should be capable of delivering LOOUA of current Logic Control The state of the 1SL54409 and ISL54410 device is determined by the voltage at the IN pin and the CTRL pin When the J P1 three pin jumper is in the 1 2 position access to the IN pin is through the BNC connector J 3 When the jumper is in the 2 3 position access to the IN pin is through switch S1 When the J P2 three pin jumper is in the 2 3 position access to the CTRL pin is through the BNC connector J 8 When the jumper is in the 1 2 position access to the CTRL pin is through switch S2 The IN and CTRL pins are 1 8V logic compatible which allows for control via a standard ucontroller Logic 0 LOW when lt 0 5V or floating Logic 1 HIGH when gt 1 4V Note The evaluation board has a 1MQ pull down resistor from the IN pin to ground and CTRL pin to ground In addition the 1SL54409 and 1SL54410 IC ha
4. d D lines are connected to the switch COM and COM terminals which allows a mutually exclusive common connector for multiplexing audio and USB signals The 1SL54409 features a low power shut down mode while the 1SL54410 features integrated Audio Click and Pop Elimination This application note will guide the user through the process of configuring and using the evaluation board to evaluate the 1SL54409 or 1SL54410 device Key Features e Standard USB Connectors e BNC Input Jacks and Headphone Speaker J ack e On board or External Logic Control e Convenient Test Points and Connections for Test Equipment FIGURE 1 ISL54409EVAL1Z EVALUATION BOARD TOP VIEW Board Architecture Layout Basic Layout of Evaluation Board The basic layout of the main board is as follows Refer to Figure 1 1 VCC and GND connections are at the top of the board J1 and J2 The board operates on a 2 7V to 5 0V power supply 2 Logic control connections are at the top of the board J3 and J8 for external control S1 and S2 for on board control 3 Audio inputs are at the upper right side of the board J9 and J10 Audio outputs are at the standard headphone connector J11 4 USB connection to an upstream host controller is made at connector J5 USB connection to a downstream USB device is made at connector J 4 5 Located below S1 of the board is the I1SL54409 or 1SL54410 IC U1 October 8 2009 1 AN1501 0 CAUTION These devi
5. her portable battery powered equipment Either a headphone will be in the common connector to play music or a USB cable from a computer will be in the common connector to transmit digital data TABLE 1 EVALUATI ON BOARD COMPONENT DEFINITIONS DESIGNATOR DESCRIPTION U1 ISL54409I RUZ or ISL54410IRUZ IC jl VCC Banana J ack Connection J2 GND Banana Jack Connection J3 IN Logic Control BNC Connector J4 J5 Standard USB Connectors J8 CTRL Logic Control BNC Connector J9 LIN BNC Connector J10 RIN BNC Connector S1 IN Logic Control Toggle Switch S2 CTRL Logic Control Toggle Switch 2 _imtersil AN1501 0 October 8 2009 Application Note 1501 COMPUTER USB PORT USB DEVICE J11 HEADPHONE A Sack DC POWER SUPPLY ISL54409EVAL1Z EVALUATION BOARD 410 LOGIC CONTROL AUDIO SOURCE FI GURE 2 BASIC EVALUATI ON TEST SETUP BLOCK DI AGRAM Using The Board Refer to Figure 2 Lab Equipment The equipment external supplies and signal sources needed to operate the board are listed as follows 1 2 7V to 5 0V DC Power Supply 2 Stereo Audio Source MP3 Radio CD Player or Audio Generator 3 Headphone Set or Audio Analyzer Oscilloscope 4 Standard USB 2 0 Cables 5 Computer with USB Host Port 6 USB Device i e USB Memory Stick MP3 Player with USB Port etc Initial Board Setup Procedure 1 Attach the main evaluation board to a DC powe
6. inters Application Note 1501 ISL54409EVAL1Z 1SL54410EVAL1Z Evaluation Board User s Manual Description The ISL54409EVAL1Z and 1SL54410EVAL1Z evaluation board are designed to provide a quick and easy method for evaluating the 1SL54409 and ISL54410 Audio USB wired OR IC switch To use the evaluation board properly requires a thorough knowledge on the operation of the SL54409 and 1SL54410 IC Refer to the 1SL54409 ISL54410 data sheet for the features and functions of the device Studying the device s logic truth table along with the Applications Block Diagram is a quick way to understanding the operation of the IC A picture of the main evaluation board is shown in Figure 1 The 1SL54409 1SL54410 uTQFN IC is soldered onto the evaluation board It is designated as U1 The ISL54409 and ISL54410 is a dual SPST audio switch with low OFF capacitance on the output terminals This allows USB 2 0 HS signals to be connected to the output terminals with minimal degradation of the USB signal in a wired OR configuration for 2 1 multiplexing of audio and USB2 0 signals to a common connector For example a headphone can be plugged into the headphone jack J11 and an audio signal can be applied to the BNC connectors J9 and J10 when the switch is placed into the audio mode The switch can be turned off and placed into the USB mode allowing a USB 2 0 device to be plugged into J 4 and a USB 2 0 Host to be plugged into J5 The USB D an
7. r supply at J1 VCC and J12 GND The supply should be capable of delivering 2 7V to 5 0V and 100A of current 2 Connect the stereo audio source left channel to J9 BNC connector and right channel to J10 BNC connector 3 Connect the USB device to the USB type A receptacle J4 4 Connect a USB Host using a standard USB 2 0 Cable to the USB type B receptacle J5 Audio Mode Operation 1 Install a headphone into the headphone jack J11 2 Logic Control Put CTRL Logic 1 and IN Logic 0 You will now be in Audio mode 3Q audio switches are ON 3 Turn the audio source ON You should hear the audio signal in the headphones USB Mode Operation 1 Turn OFF audio stereo source 2 Remove headphone from J11 Headphone Jack 3 Logic Control Put IN Logic 1 You will now be in USB mode 3Q Audio switches are OFF 4 The computer should indicate that it is connected to the USB device at the J 4 receptacle You will now be able to send and receive data between the computer and USB device If you disconnect the USB cable from J 1 and take the IN pin LOW the IC will return to Audio mode You can now plug the headphone set into headphone jack turn the audio source ON to once again play music 3 intersil AN1501 0 October 8 2009 Application Note 1501 ISL54409EVAL1Z Evaluation Board Schematic VDD GND OFF a SPDT_ONO N VDD J2 f TN 1 J d oe ONgo Ag R
8. ve an internal 4MQ pull down resistor on the IN and CTRL logic pins If the user wishes to remove the 1MQ resistors on the board simply depopulate R2 for the CTRL pin and R3 for the IN pin If IN is LOW and CTRL is HIGH the part will be in the Audio mode The switches will be ON and can pass audio signals from the LIN RIN to COM COM If IN is driven HIGH and CTRL X don t care the part will be in the USB mode The switches will be turned OFF providing excellent signal isolation from LIN RIN to COM COM For the 1SL54409 if IN is logic O and CTRL is logic 0 the part will be in the Low Power mode In Low Power mode both switches are OFF and the part will draw less than 10nA typically For the 1SL54410 if IN is logic O and CTRL is logic 0 the part will be in the Audio Click and Pop mode In Audio Click and Pop mode both switches are OFF and the LIN RIN pins will have a 40Q shunt path to ground Audio Inputs The evaluation board has two audio inputs LIN J9 and RIN J10 using BNC connectors on the right side of the evaluation board Over a signal range of 1V to 1V 0 707Vpms these switches have an extremely low ON resistance variation The roy of the switch is typically less than 3Q They can pass ground referenced audio signals with very low distortion lt 0 04 THD N when delivering 4mW into a 32Q headphone speaker load A signal range above 0 707Vpms is acceptable but THD N performance will degrade
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