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PDF ISL54221 Data sheet ( Hoja de datos )
| Número de pieza | ISL54221 | |
| Descripción | High-Speed USB 2.0 (480Mbps) Multiplexer | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL54221 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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Data Sheet
High-Speed USB 2.0 (480Mbps)
Multiplexer
The Intersil ISL54221 is a single supply dual 2:1 multiplexer
that can operate from a single 2.7V to 5.5V supply. It contains
two SPDT (Single Pole/Double Throw) switches configured as
a DPDT. The part was designed for switching or routing of
USB High-Speed signals and/or USB Full-speed signals in
portable battery powered products.
The 6.7Ω switches can swing rail to rail and were specifically
designed to pass USB full-speed data signals that range from
0V to 3.3V and USB high-speed data signals that range from
0V to 400mV. They have high bandwidth and low capacitance
to pass USB high-speed data signals with minimal distortion.
The part can be used in Personal Media Players and other
portable battery powered devices that need to route USB
high-speed signals or full-speed signals to different
transceiver sections of the device while connected to a single
USB host (computer).
The digital logic inputs are 1.8V logic compatible when
operated with a 2.7V to 3.6V supply. The ISL54221 has an
output enable pin to open all the switches. It can be used to
facilitate proper bus disconnect and connection when
switching between the USB sources.
The ISL54221 is available in a tiny 10 Ld 2.1mmx1.6mm
µTQFN package. It operates over a temperature range of
-40 to +85°C.
Application Block Diagram
December 16, 2008
ISL54221
FN6820.0
Features
• High-Speed (480Mbps) and Full-Speed (12Mbps)
Signaling Capability per USB 2.0
• 1.8V Logic Compatible (2.7V to +3.6V supply)
• Enable Pin to Open all Switches
• Power OFF Protection
• D-/D+ Pins Overvoltage Tolerant to 5.5V
• -3dB Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . 742MHz
• Low ON Capacitance. . . . . . . . . . . . . . . . . . . . . . . . 7.4pF
• Low ON-Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . 6.7Ω
• Single Supply Operation (VDD) . . . . . . . . . . . . 2.7V to 5.5V
• Available in µTQFN Package
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit and Overvoltage
Requirements Without Additional External Components
Applications
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• Digital Cameras and Camcorders
• USB Switching
VBUS
D-
D+
GND
VDD
ISL54221
SEL
LOGIC CIRCUITRY
OE
HSD1-
D- HSD1+
D+
GND
HSD2-
HSD2+
µCONTROLLER
USB
HIGH-SPEED
OR
FULL-SPEED
TRANSCEIVER
USB
HIGH_SPEED
OR
FULL-SPEED
TRANSCEIVER
PORTABLE MEDIA DEVICE
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.
1 page  
ISL54221
Test Circuits and Waveforms
www.DataVSDhDeet4U.com
LOGIC
INPUT
0V
50%
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
tON
tOFF
VOUT
90%
tr < 20ns
tf < 20ns
90%
Logic input waveform is inverted for switches that have the opposite
logic sense.
VDD
C
VINPUT
SWITCH
INPUT
HSDxx
SEL
VIN GND
Dx
OE
VOUT
RL CL
50Ω 10pF
Repeat test for all switches. CL includes fixture and stray
capacitance.
VOUT
=
V (INPUT)
---------R-----L---------
RL + rON
FIGURE 1A. MEASUREMENT POINTS
FIGURE 1. SWITCHING TIMES
FIGURE 1B. TEST CIRCUIT
VDD C
LOGIC
INPUT
VDD
0V
SWITCH
OUTPUT
VOUT
0V
90%
VINPUT
VIN
HSD2x
HSD1x
SEL
GND
Dx
OE
VOUT
RL CL
50Ω 10pF
tD
Repeat test for all switches. CL includes fixture and stray
capacitance.
FIGURE 2A. MEASUREMENT POINTS
FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD
C
rON = V1/40mA
VHSDX
HSDx
40mA
V1
Dx
GND
SEL OV OR VDD
OE
Repeat test for all switches.
FIGURE 3. rON TEST CIRCUIT
5
FN6820.0
December 16, 2008
5 Page 
ISL54221
Typical Performance Curves TA = +25°C, Unless Otherwise Specified (Continued)
www.DataSheet4U.com
VDD = 3.3V
TIME SCALE (10ns/DIV)
FIGURE 12. EYE PATTERN: 12Mbps WITH SWITCHES IN THE SIGNAL PATH
1
0
-1
-2
-3
-4
RL = 50Ω
VIN = 0dBm, 0.2VDC BIAS
1M
10M
100M
FREQUENCY (Hz)
FIGURE 13. FREQUENCY RESPONSE
1G
-10
-20
RL = 50Ω
VIN = 0dBm, 0.2VDC BIAS
-30
-40
-50
-60
-70
-80
-90
-100
-110
0.001
0.01
0.1 1M 10M
FREQUENCY (Hz)
FIGURE 14. OFF-ISOLATION
100M 500M
11 FN6820.0
December 16, 2008
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ISL54221.PDF ] | |
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