isl54205b

Manufacturer Part Numberisl54205b
DescriptionMp3/usb 2.0 High Speed Switch With Negative Signal Handling
ManufacturerIntersil Corporation
isl54205b datasheet
 
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Data Sheet
MP3/USB 2.0 High Speed Switch with
Negative Signal Handling
The Intersil ISL54205B dual SPDT (Single Pole/Double
Throw) switches combine low distortion audio and accurate
USB 2.0 high speed data (480Mbps) signal switching in the
same low voltage device. When operated with a 2.7V to 3.6V
single supply these analog switches allow audio signal swings
below-ground, allowing the use of a common USB and audio
headphone connector in Personal Media Players and other
portable battery powered devices.
The ISL54205B incorporates circuitry for detection of the USB
V
voltage, which is used to switch between the audio and
BUS
USB signal sources in the portable device. The part has a
control pin to open all the switches and put the part in a low
power down state.
The ISL54205B is available in a small 10 Ld 2.1mmx1.6mm
ultra-thin
TQFN package and a 10Ld 3mmx3mm TDFN
µ
package. It operates over a temperature range of -40 to
+85°C.
Related Literature
• Application Note AN1280 “ISL54205EVAL1Z Evaluation
Board User’s Manual.
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Application Note AN557 “Recommended Test Procedures
for Analog Switches”
Application Block Diagram
22kΩ
COM -
COM +
1
September 25, 2007
Features
• High Speed (480Mbps) and Full Speed (12Mbps)
Signaling Capability per USB 2.0
• Low Distortion Negative Signal Capability
• Detection of V
• Control Pin to Open all Switches and Enter Low Power
State
• Low Distortion Headphone Audio Signals
- THD+N at 20mW into 32Ω Load . . . . . . . . . . . . . <0.1%
• Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB
• Single Supply Operation (V
• -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 630MHz
• Available in
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit Requirements
Without Additional External Components
Applications
• MP3 and Other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Audio/USB Switching
V
DD
ISL54205B
V
BUS
CTRL
LOGIC CIRCUITRY
4MΩ
4MΩ
D-
D+
50kΩ
L
R
50kΩ
GND
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
All other trademarks mentioned are the property of their respective owners.
ISL54205B
FN6557.0
Voltage on USB Cable
BUS
) . . . . . . . . . . . . 2.7V to 3.6V
DD
TQFN and TDFN Packages
µ
µCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
CODEC
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved

isl54205b Summary of contents

  • Page 1

    ... BUS USB signal sources in the portable device. The part has a control pin to open all the switches and put the part in a low power down state. The ISL54205B is available in a small 10 Ld 2.1mmx1.6mm ultra-thin TQFN package and a 10Ld 3mmx3mm TDFN µ package. It operates over a temperature range of -40 to +85° ...

  • Page 2

    ... VBUS 2 4M COM - 3 4 COM + 50k 5 GND NOTE: 1. ISL54205B Switches shown for V BUS Truth Table V BUS CTRL: Logic “0” when ≤ 0.5V or Float, Logic “1” when ≥ 1.4V : Logic “0” when ≤ 0.2V or Float, Logic “1” when ≥V ...

  • Page 3

    ... CTRL 3 ISL54205B FUNCTION Power Supply Digital Control Input Voice and Data Common Pin Voice and Data Common Pin Ground Connection Audio Right Input Audio Left Input USB Differential Input USB Differential Input Digital Control Input (Audio Enable) FN6557 ...

  • Page 4

    ... ON-Resistance COMx (See Figure 4) 4 ISL54205B Thermal Information Thermal Resistance (Typical, Notes 5, 6) θ µTQFN Package . . . . . . . . . . . . ) + 0.3V 3x3 TDFN Package . . . . . . . . . . Maximum Junction Temperature (Plastic Package +150° 0.3V) Maximum Storage Temperature Range . . . . . . . . . . . -65°C to +150°C DD Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below ) + 0 ...

  • Page 5

    ... Power State) DIGITAL INPUT CHARACTERISTICS V Voltage Low BUS BUSL DD V Voltage High BUS BUSH DD CTRL Voltage Low CTRLL DD 5 ISL54205B Test Conditions 1.4V, V CTRLH CTRLL (Continued) TEST CONDITIONS = 3.6V 4.4V, CTRL = 0V or 3.6V, BUS = 40mA Voltage at max 3.6V ...

  • Page 6

    ... V INPUT INPUT V 90% SWITCH OUTPUT Logic input waveform is inverted for switches that have the opposite logic sense. FIGURE 1A. MEASUREMENT POINTS 6 ISL54205B Test Conditions 1.4V, V CTRLH CTRLL (Continued) TEST CONDITIONS = 2.7V to 3.6V = 3.6V float, CTRL = 0V or float BUS = 3.6V 5.25V, CTRL = 0V or float BUS = 3 ...

  • Page 7

    ... V /100mA ON 1 CTRL 100mA COMX GND Repeat test for all switches. FIGURE 3. AUDIO r TEST CIRCUIT ON 7 ISL54205B (Continued) V INPUT V BUS 90 Repeat test for all switches. C FIGURE 2. BREAK-BEFORE-MAKE TIME FLOAT V BUS Repeat test for all switches. ...

  • Page 8

    ... OUT+ t skew_o OUT- 50% 90% 10 FIGURE 7A. MEASUREMENT POINTS 8 ISL54205B (Continued SIGNAL GENERATOR V BUS V OR BUSL V BUSH ANALYZER Signal direction through switch is reversed, worst case values are recorded. Repeat test for all switches. FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT ...

  • Page 9

    ... BUS audio CODEC drivers and USB transceiver of the MP3 player or cell phone. The ISL54205B contains a logic control pin (CTRL) that when driven low while V switches and puts the part into a low power state, drawing typically 1nA of I current ...

  • Page 10

    ... USB hub is connected at the common connector, the voltage at the VBUS pin will be driven the range of 4.4V to 5.25V. The ISL54205B 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 ...

  • Page 11

    ... DD 0. 0.05 0.04 20 200 FREQUENCY (Hz) FIGURE 8. THD+N vs SUPPLY VOLTAGE vs FREQUENCY 0 32Ω LOAD FREQ = 1kHz 0.4 0.3 0.2 0 0.5 1.0 1.5 2.0 OUTPUT VOLTAGE (V FIGURE 10. THD+N vs OUTPUT VOLTAGE 11 ISL54205B T = +25°C, Unless Otherwise Specified A 0.4 0.3 0 20k 20 FIGURE 9. THD+N vs SIGNAL LEVELS vs FREQUENCY 0.5 0.4 0.3 0.2 0 2.5 3.0 3 32Ω LOAD ...

  • Page 12

    ... Typical Performance Curves FIGURE 12. EYE PATTERN: 480Mbps WITH SWITCH IN THE SIGNAL PATH 12 ISL54205B T = +25°C, Unless Otherwise Specified (Continued) A TIME SCALE (10ns/DIV) FN6557.0 September 25, 2007 ...

  • Page 13

    ... Typical Performance Curves FIGURE 13. EYE PATTERN: 12MBps WITH SWITCHES IN THE SIGNAL PATH 13 ISL54205B T = +25°C, Unless Otherwise Specified (Continued) A TIME SCALE (10ns/DIV 3.3V DD FN6557.0 September 25, 2007 ...

  • Page 14

    ... Typical Performance Curves 50Ω 0. P-P P-P 1M 10M FREQUENCY (Hz) FIGURE 14. FREQUENCY RESPONSE 14 ISL54205B T = +25°C, Unless Otherwise Specified (Continued) A Die Characteristics USB SWITCH SUBSTRATE POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 98 PROCESS: Submicron CMOS 100M 1G FN6557.0 September 25, 2007 ...

  • Page 15

    ... X e BOTTOM VIEW C L (A1 SECTION "C-C" FOR ODD TERMINAL/SIDE b 0.05 MIN 0.10 MIN DETAIL “A” PIN ISL54205B L10.2.1x1. LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE E SYMBOL 4xk Ne (DATUM B) NOTES Dimensioning and tolerancing conform to ASME Y14.5-1994. ...

  • Page 16

    ... 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 16 ISL54205B L10.3x3A 0.10 C ...