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PDF ISL54205A Data sheet ( Hoja de datos )
| Número de pieza | ISL54205A | |
| Descripción | MP3/USB 2.0 High Speed Switch | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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®
Data Sheet
December 7, 2006
ISL54205A
FN6342.1
MP3/USB 2.0 High Speed Switch with
Negative Signal Handling
The Intersil ISL54205A 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 ISL54205A incorporates circuitry for detection of the USB
VBUS voltage, which is used to switch between the audio and
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 ISL54205A is available in a small 10 Ld 2.1mm x 1.6mm
ultra-thin μTQFN package and a 10Ld 3mm x 3mm TDFN
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
VBUS
COM -
VDD
ISL54205A
Logic Circuitry
4MΩ
4MΩ
Features
• High Speed (480Mbps) Signaling Capability per USB 2.0
• Low Distortion Negative Signal Capability
• Detection of VBUS Voltage on USB Cable
• 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 (VDD) . . . . . . . . . . . . 2.7V to 3.6V
• -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 630MHz
• Available in μTQFN and TDFN Packages
• Pb-Free Plus Anneal (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
CTRL
D-
D+
μCONTROLLER
USB
HIGH-SPEED
TRANSCEIVER
COM +
50kΩ
50kΩ
L
R
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. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL54205A
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
VCTRLH = 1.4V, VCTRLL = 0.5V, (Notes 4, 6), unless otherwise specified.
(Continued)
PARAMETER
TEST CONDITIONS
TEMP MIN
MAX
(°C) (Note 5) TYP (Note 5) UNITS
Input Current, IBUSH
VDD = 3.6V, VBUS = 5.25V, CTRL = 0V or float
Full -2 1.1 2 μA
Input Current, ICTRLH
VDD = 3.6V, VBUS = 0V or float, CTRL = 3.6V
Full -2 1.1 -2 μA
VBUS Pull-Down Resistor, RVBUS VDD = 3.6V, VBUS = 5.25V, CTRL = 0V or float
Full - 4 - MΩ
CTRL Pull-Down Resistor, RCTRL VDD = 3.6V, VBUS = 0V or float, CTRL = 3.6V
Full - 4 - MΩ
NOTES:
4. VLOGIC = Input voltage to perform proper function.
5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet.
6. Parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.
7. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range.
8. Guaranteed by design.
9. 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-.
Test Circuits and Waveforms
VBUSH
LOGIC
INPUT
VBUSL
50%
tOFF
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
VOUT
90%
tON
tr < 20ns
tf < 20ns
90%
VDD
C
VINPUT
SWITCH
INPUT
CTRL
AUDIO OR USB
VBUS
COMX
VBUS
GND
VOUT
RL CL
50Ω 10pF
Logic input waveform is inverted for switches that have the opposite
logic sense.
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
-----------R-----L-----------
RL + r(ON)
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
5 FN6342.1
December 7, 2006
5 Page 
ISL54205A
Typical Performance Curves TA = +25°C, Unless Otherwise Specified (Continued)
TIME (10ns/DIV)
FIGURE 12. EYE PATTERN: 480Mbps WITH SWITCH IN THE SIGNAL PATH
11 FN6342.1
December 7, 2006
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ISL54205A.PDF ] | |
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