ISL54215 ® Data Sheet November 25, 2008 FN6815.0 MP3/USB 2.0 High Speed Switch with Negative Signal Handling and Low Power Shutdown Features The Intersil ISL54215 dual SPDT (Single Pole/Double Throw) switch combines low distortion audio and accurate USB 2.0 high speed data (480Mbps) signal switching in the same low voltage device. When operated with a 2.5V to 5.0V single supply, this analog switch allows audio signal swings below ground, allowing for the use of a common USB and audio headphone connector in Personal Media Players and other portable battery powered devices. • Low Distortion Negative Signal Capability • High Speed (480Mbps) and Full Speed (12Mbps) Signaling Capability per USB 2.0 • Low Power Shutdown State • Low Distortion Headphone Audio Signals - THD+N at 1mW into 32Ω Load . . . . . . . . . . . . <0.013% • Crosstalk (100kHz) . . . . . . . . . . . . . . . . . . . . . . . . . -95dB • OFF-Isolation (100kHz) . . . . . . . . . . . . . . . . . . . . . . 95dB The ISL54215 logic control pins are 1.8V compatible, which allows for control via a standard microcontroller. • Single Supply Operation (VDD) . . . . . . . . . . . . 2.5V to 5.0V The ISL54215 has an audio enable control pin to open all switches and put the part in a low power state. In this state, the device draws typically 1nA of current. • Available in µTQFN Package The ISL54215 is available in a small 10 Ld 2.1mmx1.6mm ultra-thin µTQFN package. It operates over a temperature range of -40°C to +85°C. • -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 736MHz • Compliant with USB 2.0 Short Circuit Requirements Without Additional External Components • Pb-Free (RoHS Compliant) Applications Related Literature • MP3 and other Personal Media Players • Technical Brief TB363 “Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)” • Cellular/Mobile Phones • PDAs • Audio/USB Switching Application Block Diagram 3.3V VDD ISL54215 USB/HEADPHONE JACK IN CTRL µCONTROLLER LOGIC CONTROL VBUS 4MΩ 4MΩ DCOM D+ USB HIGH-SPEED TRANSCEIVER COM + L R AUDIO CODEC GND 1 CAUTION: These devices 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. 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL54215 Pinouts (Note 1) CTRL ISL54215 (10 LD 2.1mmx1.6mm µTQFN) TOP VIEW 10 4MΩ VDD 1 IN 2 LOGIC CONTROL 9 D8 D+ 4MΩ COM - 3 7 L COM + 4 6 R GND 5 NOTE: 1. ISL54215 Switches Shown for IN = Logic “0” and CTRL = Logic “1”. Truth Table Ordering Information ISL54215 IN CTRL L, R D+, D- 0 0 OFF OFF 0 1 ON OFF 1 X OFF ON IN, CTRL: Logic “0” when ≤ 0.5V or Floating, Logic “1” when ≥ 1.4V with 2.7V to 3.6V Supply. Pin Descriptions PIN NUMBER NAME 1 VDD 2 IN 3 COM- Voice and Data Common Pin 4 COM+ Voice and Data Common Pin 5 GND 6 R Audio Right Input 7 L Audio Left Input 8 D+ USB Differential Input 9 D- USB Differential Input 10 CTRL PART NUMBER (Note 2) PART MARKING ISL54215IRUZ-T* GR TEMP. RANGE (°C) PACKAGE (Pb-Free) PKG. DWG. # -40 to +85 10 Ld µTQFN L10.2.1x1.6A *Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pbfree material sets; molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FUNCTION Power Supply Digital Control Input Ground Connection Digital Control Input (Audio Enable) 2 November 25, 2008 ISL54215 Absolute Maximum Ratings Thermal Information VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V Input Voltages D+, D- (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 2V to 5.5V L, R (Note 3) . . . . . . . . . . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V) IN, CTRL (Note 3) . . . . . . . . . . . . . . . . . . -0.3V to ((VDD) + 0.3V) Output Voltages COM-, COM+ (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V Continuous Current (Audio Switches). . . . . . . . . . . . . . . . . ±150mA Peak Current (Audio Switches) (Pulsed 1ms, 10% Duty Cycle, Max). . . . . . . . . . . . . . . . ±300mA Continuous Current (USB Switches). . . . . . . . . . . . . . . . . . . ±40mA Peak Current (USB Switches) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . ±100mA ESD Ratings Human Body Model, I/0 to GND . . . . . . . . . . . . . . . . . . . . . . >4kV Human Body Model, All Other Pins. . . . . . . . . . . . . . . . . . .>3.5kV Human Body Model, VDD to GND. . . . . . . . . . . . . . . . . . . . >11kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >250V Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV Thermal Resistance (Typical, Notes 4, 5) θJA (°C/W) θJC (°C/W) 10 Ld 2.1mmx1.6mm µTQFN Package 154 48.3 Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C Maximum Storage Temperature Range. . . . . . . . . . . . -65°C to +150°C Pb-free reflow profile. . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTES: 3. Signals on D+, D-, L, R, COM-, COM+, CTRL and IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current ratings. 4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 5. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V, (Note 6), Unless Otherwise Specified. PARAMETER TEST CONDITIONS TEMP MIN (°C) (Notes 7, 8) TYP MAX (Notes 7, 8) UNITS ANALOG SWITCH CHARACTERISTICS Audio Switches (L, R) Analog Signal Range, VANALOG VDD = 3.3V, IN = 0.5V, CTRL = 1.4V ON-Resistance, rON VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Figure 3, Note 10) rON Matching Between Channels, ΔrON VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = Voltage at max rON over signal range of -0.85V to 0.85V (Notes 10, 11) rON Flatness, rFLAT(ON) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Notes 9, 10) Full -1.5 - 1.5 V 25 - 2.5 2.8 Ω Full - - 3.4 Ω 25 - 0.09 0.25 Ω Full - - 0.26 Ω 25 - 0.02 0.05 Ω Full - - 0.07 Ω ON-Resistance, rON VDD = 5.0V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Figure 3) 25 - 2.3 - Ω ON-Resistance, rON VDD = 4.2V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Figure 3) 25 - 2.35 - Ω ON-Resistance, rON VDD = 2.85V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Figure 3) 25 - 2.72 - Ω Full 0 - VDD V 25 - 5 6.5 Ω Full - - 7 Ω USB Switches (D+, D-) Analog Signal Range, VANALOG VDD = 2.7V to 3.6V, IN = 1.4V, CTRL = 1.4V ON-Resistance, rON (High-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV (Figure 4, Note 10) 3 November 25, 2008 ISL54215 Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V, (Note 6), Unless Otherwise Specified. (Continued) PARAMETER TEST CONDITIONS TEMP MIN (°C) (Notes 7, 8) TYP MAX (Notes 7, 8) UNITS rON Matching Between Channels, ΔrON (High-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = Voltage at max rON (Notes 10, 11) 25 - 0.05 0.25 Ω Full - - 0.55 Ω rON Flatness, rFLAT(ON) (High-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV (Notes 9, 10) 25 - 0.45 0.55 Ω Full - - 1.0 Ω ON-Resistance, rON (Full-Speed) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 1mA, VD+ or VD- = 3.3V (Figure 4, Note 10) 25 - 25 30 Ω Full - - 35 Ω ON-Resistance, rON VDD = 5.0V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 5V (Figure 4) 25 - 20 - Ω ON-Resistance, rON VDD = 4.2V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 4.2V (Figure 4) 25 - 22 - Ω ON-Resistance, rON VDD = 2.85V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 2.85V (Figure 4) 25 - 28 - Ω OFF-Leakage Current, ID+(OFF) or ID-(OFF) VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ = 0.5V, 0V, VD+ or VD- = 0V, 0.5V, VL and VR = float 25 -5 0.5 5 nA Full -60 - 60 nA ON-Leakage Current, IDX VDD = 3.6V, IN = VDD, CTRL = 0V or VDD, VD+ or VD- = 2.7V, VCOM- or VCOM+ = Float, VL and VR = float 25 -10 2 10 nA Full -70 - 70 nA DYNAMIC CHARACTERISTICS USB Turn-ON Time, tON VDD = 3.0V, RL = 50Ω, CL = 10pF (Figure 1) 25 - 30 - ns USB Turn-OFF Time, tOFF VDD = 3.0V, RL = 50Ω, CL = 10pF (Figure 1) 25 - 20 - ns Audio Turn-ON Time, tON VDD = 3.0V, RL = 50Ω, CL = 10pF (Figure 1) 25 - 2.5 - µs Audio Turn-OFF Time, tOFF VDD = 3.0V, RL = 50Ω, CL = 10pF (Figure 1) 25 - 30 - ns Break-Before-Make Time Delay, VDD = 3.0V, RL = 50Ω, CL = 10pF (Figure 2) tD 25 - 13 - ns Skew, (tSKEWOUT - tSKEWIN) VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45Ω, CL = 10pF, tR = tF = 720ps at 480Mbps, (Duty Cycle = 50%) (Figure 7) 25 - 50 - ps Total Jitter, tJ VDD =3.0V, IN = 3V, CTRL = 3V, RL = 45Ω, CL = 10pF, tR = tF = 750ps at 480Mbps 25 - 210 - ps Propagation Delay, tPD VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45Ω, CL = 10pF (Figure 7) 25 - 250 - ps Audio Crosstalk R to COM-, L to COM+ VDD = 3.0V, IN = 0V, CTRL = 3.0V, RL = 32Ω, f = 20Hz to 20kHz, VR or VL = 0.707VRMS (2VP-P) (Figure 6) 25 - -100 - dB Crosstalk (Audio to USB, USB to Audio) VDD = 3.0V, RL = 50Ω, f = 100kHz (Figure 6) 25 - -95 - dB OFF-Isolation VDD = 3.0V, RL = 50Ω, f = 100kHz 25 - 95 - dB OFF-Isolation VDD = 3.0V, RL = 32Ω, f = 20Hz to 20kHz 25 - 115 - dB Total Harmonic Distortion f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VL or VR = 180mVRMS (509mVP-P), RL = 32Ω 25 - 0.013 - % Total Harmonic Distortion f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VL or VR = 0.707VRMS (2VP-P), RL = 32Ω 25 - 0.05 - % USB Switch -3dB Bandwidth Signal = 0dBm, 0.2VDC offset, RL = 50Ω, CL = 5pF 25 - 736 - MHz D+/D- OFF-Capacitance, CDxOFF f = 1MHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VD- or VD+ = VCOMx = 0V (Figure 5) 25 - 3 - pF 25 - 5 - pF L/R OFF-Capacitance, CLOFF, f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VL or CROFF VR = VCOMx = 0V (Figure 5) 4 November 25, 2008 ISL54215 Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V, (Note 6), Unless Otherwise Specified. (Continued) PARAMETER COM ON-Capacitance, CCOMx(ON) TEST CONDITIONS f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VD- or VD+ = VCOMx = 0V (Figure 5) TEMP MIN (°C) (Notes 7, 8) 25 - Full 2.5 TYP 7 MAX (Notes 7, 8) UNITS - pF 5.0 V POWER SUPPLY CHARACTERISTICS Power Supply Range, VDD Positive Supply Current, IDD Positive Supply Current, IDD (Low Power State) VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V VDD = 3.6V, IN = 0V, CTRL = 0V or float Power OFF-Current, IDx ICOMx VDD = 0V, VDx = VCOMx = 5.25V, IN = CTRL = Float 25 - 7 13 µA Full - - 15 µA 25 - 1 10 nA Full - - 150 nA 25 - 7 - µA DIGITAL INPUT CHARACTERISTICS Voltage Low, VINL, VCTRLL VDD = 2.7V to 3.6V Full - - 0.5 V Voltage High, VINH, VCTRLH VDD = 2.7V to 3.6V Full 1.4 - - V Input Current, IINL, ICTRLL VDD = 3.6V, IN = 0V, CTRL = 0V Full -50 20 50 nA Input Current, IINH VDD = 3.6V, IN = 3.6, CTRL = 0V Full -2 0.9 2 µA Input Current, ICTRLH VDD = 3.6V, IN = 0V, CTRL = 3.6V Full -2 0.9 2 µA CTRL Pull-Down Resistor, RCTRL VDD = 3.6V, IN = 0V, CTRL = 3.6V; measure current through the internal pull-down resistor and calculate resistance value. Full - 4 - MΩ IN Pull-Down Resistor, RIN VDD = 3.6V, IN = 3.6V, CTRL = 3.6V; measure current through the internal pull-down resistor and calculate resistance value. Full - 4 - MΩ NOTES: 6. Vlogic = Input voltage to perform proper function. 7. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 8. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 9. Flatness is defined as the difference between maximum and minimum value of ON-resistance over the specified analog signal range. 10. Limits established by characterization and are not production tested. 11. rON matching between channels is calculated by subtracting the channel with the highest max rON value from the channel with lowest max rON value, between L and R or between D+ and D-. 5 November 25, 2008 ISL54215 Test Circuits and Waveforms VINH LOGIC INPUT 50% VINL VINPUT tOFF SWITCH INPUT VINPUT SWITCH INPUT CTRL VOUT AUDIO OR USB COMx IN VOUT 90% 90% SWITCH OUTPUT C VDD tr < 20ns tf < 20ns VIN CL 10pF RL 50Ω GND 0V tON Logic input waveform is inverted for switches that have the opposite logic sense. Repeat test for all switches. CL includes fixture and stray capacitance. RL V OUT = V (INPUT) -----------------------R L + r ON FIGURE 1A. MEASUREMENT POINTS FIGURE 1B. TEST CIRCUIT FIGURE 1. SWITCHING TIMES VDD LOGIC INPUT CTRL VINH D- OR D+ VINPUT 90% 0V CL 10pF RL 50Ω IN VOUT VOUT COMx L OR R VINL SWITCH OUTPUT C GND VIN tD Repeat test for all switches. CL includes fixture and stray capacitance. FIGURE 2B. TEST CIRCUIT FIGURE 2A. MEASUREMENT POINTS FIGURE 2. BREAK-BEFORE-MAKE TIME VDD VDD C C rON = V1/40mA rON = V1/40mA CTRL CTRL D- OR D+ L OR R VL OR VR VD- OR VD+ IN 0V OR FLOAT V1 40mA 40mA COMx IN V1 VDD COMx GND GND Repeat test for all switches. Repeat test for all switches. FIGURE 3. AUDIO rON TEST CIRCUIT 6 FIGURE 4. USB rON TEST CIRCUIT November 25, 2008 ISL54215 Test Circuits and Waveforms (Continued) VDD VDD C CTRL C CTRL AUDIO OR USB SIGNAL GENERATOR L OR R IN IMPEDANCE ANALYZER 32Ω COMx IN 0V OR VDD 0V COMx GND R OR L COMx ANALYZER NC GND RL Repeat test for all switches. Signal direction through switch is reversed, worst case values are recorded. Repeat test for all switches. FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT FIGURE 5. CAPACITANCE TEST CIRCUIT VDD C tri CTRL 90% DIN+ DIN- 10% 50% tskew_i 90% VDD DIN+ IN 15.8Ω COM+ 143Ω 50% 10% tfi tro DIN- 15.8Ω OUT+ D+ CL COM- OUT- DCL 143Ω 45Ω 45Ω 90% OUT+ OUT- 10% GND 50% tskew_o 50% 90% tf0 10% |tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals. |tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals. |tskew_0| Change in Skew through the Switch for Output Signals. |tskew_i| Change in Skew through the Switch for Input Signals. FIGURE 7A. MEASUREMENT POINTS FIGURE 7B. TEST CIRCUIT FIGURE 7. SKEW TEST 7 November 25, 2008 ISL54215 Typical Application Block Diagrams 3.3V VDD ISL54215 USB/HEADPHONE JACK IN CTRL µCONTROLLER LOGIC CONTROL VBUS 4MΩ 4MΩ DCOM D+ USB HIGH-SPEED TRANSCEIVER COM + L AUDIO CODEC R GND FIGURE 8. LOGIC CONTROL VIA MICROPROCESSOR 3.3V VDD ISL54215 IN USB/HEADPHONE JACK CTRL µCONTROLLER LOGIC CONTROL VBUS 4MΩ 4MΩ 500kΩ DCOM D+ USB HIGH-SPEED TRANSCEIVER COM + L R AUDIO CODEC GND FIGURE 9. LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB Detailed Description The ISL54215 device is a dual single pole/double throw (SPDT) analog switch that operates from a single DC power supply in the range of 2.5V to 5.0V. It was designed to function as a dual 2 to 1 multiplexer to select between USB differential data signals and audio L and R stereo signals. It comes in tiny µTQFN package for use in MP3 players, PDAs, cellular phones and other personal media players. 8 The part consists of two 2.5Ω audio switches and two 5Ω USB switches. The audio switches can accept signals that swing below ground. They were designed to pass audio left and right stereo signals, that are ground referenced, with minimal distortion. The USB switches were designed to pass high-speed USB differential data signals with minimal edge and phase distortion. The ISL54215 was specifically designed for MP3 players, personal media players and cellular phone applications that need to combine the audio headphone jack and the USB November 25, 2008 ISL54215 data connector into a single shared connector, thereby saving space and component cost. “Typical Application Block Diagrams” on page 8 of this functionality are shown in Figures 8 and 9. The ISL54215 has a single logic control pin (IN) that selects between the audio switches and the USB switches. This pin can be driven Low or High to switch between the audio CODEC drivers and USB transceiver of the MP3 player or cellular phone. The ISL54215 also contains a logic control pin (CTRL) that when driven Low while IN is Low, opens all switches and puts the part into a low power state, drawing typically 1nA of IDD current. Detailed descriptions of the two types of switches are provided in the following sections. Audio Switches The two audio switches (L, R) are 2.5Ω switches that can pass signals that swing below ground by as much as 1.5V. They were designed to pass ground reference stereo signals with minimal insertion loss and very low distortion over a ±1V signal range. Crosstalk between the audio channels is -100dB over the audio band. Crosstalk between the audio channel and USB channel is -95dB at 100kHz. These switches have excellent OFF-isolation, 115dB, over the audio band with a 32Ω load. Over a signal range of ±1V (0.707VRMS) with VDD > 2.7V, these switches have an extremely low rON resistance variation. They can pass ground referenced audio signals with very low distortion (<0.05% THD+N) when delivering 15.6mW into a 32Ω headphone speaker load. See Figures 10 through 13 for THD+N performance curves. These switches are bi-directional switches. In typical applications, the audio drivers would be connected at the L and R side of the switch (pins 6 and 7) and the speaker loads would be connected at the COM side of the switch (pins 3 and 4). The audio switches are active (turned ON) whenever the IN voltage is ≤ 0.5V or floating and the CTRL voltage ≥ to 1.4V. USB Switches The two USB switches (D+, D-) are bidirectional switches that can pass rail-to-rail signals. When powered with a 3.3V supply, these switches have a nominal rON of 5Ω over the signal range of 0V to 400mV with a rON flatness of 0.45Ω. The rON matching between the D+ and D- switches over this signal range is only 0.05Ω ensuring minimal impact by the switches to USB high speed signal transitions. As the signal level increases, the rON resistance increases. At a signal level of 3.3V, the switch resistance is nominally 25Ω. The USB switches were specifically designed to pass USB 2.0 high-speed (480Mbps) differential signals typically in the range of 0V to 400mV. They have low capacitance and high bandwidth to pass the USB high-speed signals with 9 minimum edge and phase distortion to meet USB 2.0 high speed signal quality specifications. See Figure 14. The USB switches can also pass USB full-speed signals (12Mbps) with minimal distortion and meet all the USB requirements for USB 2.0 full-speed signaling. See Figure 15 for Full-speed Eye Pattern taken with switch in the signal path. The maximum signal range for the USB switches is from -1.5V to VDD. The signal voltage at D- and D+ should not be allowed to exceed the VDD voltage rail or go below ground by more than -1.5V. The USB switches are active (turned ON) whenever the IN voltage is ≥ to 1.4V. ISL54215 Operation The following will discuss using the ISL54215 in the “Typical Application Block Diagrams” on page 8 shown in Figures 8 and 9. VDD SUPPLY The DC power supply connected at VDD (pin 1) provides the required bias voltage for proper switch operation. The part can operate with a supply voltage in the range of 2.5V to 5.0V. In a typical USB/Audio application for portable battery powered devices, the VDD voltage will come from a battery or an LDO and be in the range of 2.7V to 3.6V. For best possible USB full-speed operation (12Mbps), it is recommended that the VDD voltage be ≥ 2.5V in order to get a USB data signal level above 2.5V. LOGIC CONTROL The state of the ISL54215 device is determined by the voltage at the IN pin (pin 2) and the CTRL pin (pin 10). These logic pins are 1.8V logic compatible when VDD is in the range of 2.7V to 3.6V and can be controlled by a standard microprocessor. The part has three states or modes of operation. The Audio Mode, USB Mode and the Low Power Mode. Refer to the “Truth Table” on page 2. The IN and CTRL pins are internally pulled low through a 4MΩ resistor to ground and can be left floating or tri-stated by the µprocessor. The CTRL control pin is only active when IN is logic “0”. Logic control voltage levels: IN = Logic “0” (Low) when VIN ≤ 0.5V or Floating. IN = Logic “1” (High) when VIN ≥ 1.4V CTRL = Logic “0” (Low) when ≤ 0.5V or Floating. CTRL = Logic “1” (High) when ≥ 1.4V Audio Mode If the IN pin = Logic “0” and CTRL pin = Logic “1”, the part will be in the Audio mode. In Audio mode, the L (left) and R (right) 2.5Ω audio switches are ON and the D- and D+ 5Ω switches are OFF (high impedance). November 25, 2008 ISL54215 When nothing is plugged into the common connector or a headphone is plugged into the common connector, the microprocessor will sense that there is no voltage at the VBUS pin of the connector and will drive and hold the IN control pin of the ISL54215 low. As long as CTRL = Logic “1,” the ISL54215 part will be in the audio mode and the audio drivers of the media player can drive the headphones and play music. USB Mode If the IN pin = Logic “1” and the CTRL pin = Logic “0” or Logic “1”, the part will go into USB mode. In USB mode, the D- and D+ 5Ω switches are ON and the L and R 2.5Ω audio switches are OFF (high impedance). When a USB cable from a computer or USB hub is connected at the common connector, the µprocessor will sense the presence of the 5V VBUS and drive the IN pin voltage high. The ISL54215 part will go into the USB mode. In USB mode, the computer or USB hub transceiver and the MP3 player or cell phone USB transceiver are connected and digital data will be able to be transmitted back and forth. When the USB cable is disconnected, the µprocessor will sense that the 5V VBUS voltage is no longer connected and will drive the IN pin low and put the part back into the Audio or Low Power Mode. Low Power Mode If the IN pin = Logic “0” and CTRL pin = Logic “0”, the part will be in the Low Power mode. In the Low Power mode, the audio switches and the USB switches are OFF (high impedance). In this state, the device draws typically 1nA of current. In Low Power mode, the OFF-isolation and crosstalk between switch cells is minimal for negative swinging signals. Care should be taken to avoid negative swinging signals in this mode of operation. In typical applications, the 10 Low Power state will be applied to the ISL54215 part when the portable media player is in its sleep or hibernate mode to conserve battery power. In the sleep mode, no audio or USB signals are applied to the part. USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE “IN” PIN Rather than using a microprocessor to control the IN logic pin, one can directly drive the IN pin using the 5V VBUS voltage from the computer or USB hub. See the Application Block Diagram, Figure 9. When a headphone or nothing is connected at the common connector, the internal 4MΩ pull-down will pull the IN pin low, putting the ISL54215 in the Audio or Low Power mode, depending on the condition of the CTRL pin. When a USB cable is connected at the common connector, the voltage at the IN pin will be driven to 5V and the part will automatically go into the USB mode. When the USB cable is disconnected from the common connector, the voltage at the IN pin will be pulled low by the pull-down resistor and return to the Audio or Low Power mode, depending on the condition of the CTRL pin. Note: The ISL54215 contains an internal diode between the IN pin and VDD pin. Whenever the IN voltage is greater than the VDD voltage by more than 0.7V, current will flow through this diode into the VDD power supply bus. An external series resistor in the range of 100kΩ to 500kΩ is required at the IN logic pin to limit the current when driving it with the VBUS voltage. This allows the VBUS voltage from a computer or USB hub (4.4V to 5.25V) to drive the IN pin while the VDD voltage is in the range of 2.5V to 3.6V. A 500kΩ resistor will limit the current to 2.76µA and still allow the IN logic voltage to go to around 3.67V, which is will above the required VINH level of 1.4V. A smaller series resistor can be used but more current will flow. November 25, 2008 ISL54215 Typical Performance Curves TA = +25°C, Unless Otherwise Specified. 0.020 0.019 0.080 RLOAD = 32Ω PLOAD = 1mWRMS VDD = 2.6V 0.075 0.018 RLOAD = 32Ω VLOAD = 0.707VRMS VDD = 2.6V 0.070 0.016 0.015 VDD = 2.7V 0.014 0.060 0.055 VDD = 3.6V VDD = 3.6V 0.045 VDD = 5V 0.011 50 100 200 500 1k 2k FREQUENCY (Hz) 5k 0.040 20 10k 20k 50 100 200 500 1k 2k 5k 10k 20k FIGURE 11. THD+N vs SUPPLY VOLTAGE vs FREQUENCY 0.10 0.09 0.08 0.07 0.11 RLOAD = 32Ω VDD = 3V RLOAD = 32Ω FREQ = 1kHz VDD = 3V 0.06 3VP-P 0.09 VDD = 5V FREQUENCY (Hz) FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY 0.05 0.07 THD+N (%) 0.08 THD+N (%) VDD = 3V 0.050 0.012 0.10 VDD = 2.7V VDD = 3V 0.013 0.010 20 0.065 THD+N (%) THD+N (%) 0.017 2.5VP-P 0.06 0.04 0.03 2VP-P 0.05 0.02 0.04 0.03 0.02 20 1VP-P 50 100 200 500 1k 2k FREQUENCY (Hz) 5k 10k 20k FIGURE 12. THD+N vs SIGNAL LEVELS vs FREQUENCY 11 0.01 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE (VP-P) FIGURE 13. THD+N vs OUTPUT VOLTAGE November 25, 2008 ISL54215 VOLTAGE SCALE (0.1V/DIV) Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued) TIME SCALE (0.2ns/DIV) FIGURE 14. EYE PATTERN: 480Mbps WITH USB SWITCHES IN THE SIGNAL PATH 12 November 25, 2008 ISL54215 Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued) VOLTAGE SCALE (0.5V/DIV.) VDD = 3.3V TIME SCALE (10ns/DIV) FIGURE 15. EYE PATTERN: 12Mbps USB SIGNAL WITH USB SWITCHES IN THE SIGNAL PATH 1 0 USB SWITCH RL = 50Ω VSIGNAL = 0.2VP-P TO 2VP-P 0 -20 -2 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) -1 -3 -4 RL = 50Ω 10M 100M FREQUENCY (Hz) FIGURE 16. FREQUENCY RESPONSE 13 -40 -60 -80 -100 VSIGNAL = 0.2VP-P TO 2VP-P 1M VDCOFFSET = 1.5VDC 1G -120 0.001M 0.01M 0.1M 1M 10M FREQUENCY (Hz) 100M 500M FIGURE 17. OFF-ISOLATION USB SWITCHES November 25, 2008 ISL54215 Typical Performance Curves TA = +25°C, Unless Otherwise Specified. (Continued) 0 NORMALIZED GAIN (dB) -20 RL = 50Ω VSIGNAL = 0.2VP-P TO 2VP-P Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): -40 GND -60 TRANSISTOR COUNT: 98 -80 PROCESS: Submicron CMOS -100 -120 0.001M 0.01M 0.1M 1M 10M 100M 500M FREQUENCY (Hz) FIGURE 18. OFF-ISOLATION AUDIO SWITCHES All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. 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 data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 14 November 25, 2008 ISL54215 Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN) D 6 INDEX AREA A L10.2.1x1.6A B N 10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS E SYMBOL 2X MIN NOMINAL MAX 1 2X 2 0.10 C TOP VIEW C A 0.05 C SEATING PLANE 1 0.45 0.50 0.55 - A1 - - 0.05 - 0.127 REF - b 0.15 0.20 0.25 5 D 2.05 2.10 2.15 - E 1.55 1.60 1.65 - A1 e SIDE VIEW k 0.20 - - L 0.35 0.40 0.45 (DATUM A) PIN #1 ID A A3 0.10 C 4xk 2 NX L 0.50 BSC - NX b e 2 Nd 4 3 Ne 1 3 0 12 - NOTES: 5 BOTTOM VIEW CL (A1) L 5 e SECTION "C-C" TERMINAL TIP C C 4 Rev. 3 6/06 0.10 M C A B 0.05 M C 3 (ND-1) X e - 10 (DATUM B) N-1 - N θ N NX (b) NOTES 0.10 C FOR ODD TERMINAL/SIDE b 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd and Ne refer to the number of terminals on D and E side, respectively. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 7. Maximum package warpage is 0.05mm. 8. Maximum allowable burrs is 0.076mm in all directions. 9. Same as JEDEC MO-255UABD except: No lead-pull-back, "A" MIN dimension = 0.45 not 0.50mm "L" MAX dimension = 0.45 not 0.42mm. 10. For additional information, to assist with the PCB Land Pattern Design effort, see Intersil Technical Brief TB389. 2.50 1.75 0.05 MIN L 2.00 0.80 0.275 0.10 MIN DETAIL “A” PIN 1 ID 0.50 0.25 LAND PATTERN 10 15 November 25, 2008