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PDF ISL54222 Data sheet ( Hoja de datos )
| Número de pieza | ISL54222 | |
| 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 ISL54222 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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Data Sheet
February 9, 2009
ISL54222
FN6835.0
High-Speed USB 2.0 (480Mbps)
Multiplexer
The Intersil ISL54222 is a single supply dual 2:1 multiplexer
that can operate from a single 1.8V to 3.3V 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 5.5Ω 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 with a single supply as low as 1.8V. 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 and/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 1.8V to 3.3V supply. The ISL54222 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 ISL54222 is available in 10 Ld 1.8mmx1.4mm µTQFN,
10 Ld TDFN and 10 Ld MSOP packages. It operates over a
temperature range of -40 to +85°C.
Application Block Diagram
Features
• High-Speed (480Mbps) and Full-Speed (12Mbps)
Signaling Capability per USB 2.0
• 1.8V Logic Compatible
• Enable Pin to Open all Switches
• Power OFF Protection
• D-/D+ Pins are Overvoltage Tolerant to 5.5V
• -3dB Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . 782MHz
• Low ON Capacitance. . . . . . . . . . . . . . . . . . . . . . . . 6.5pF
• Low ON-Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . 5.5Ω
• Single Supply Operation (VDD) . . . . . . . . . . . . 1.8V to 3.3V
• Available in µTQFN, TDFN, and MSOP Packages
• 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
ISL54222
SEL
LOGIC CIRCUITRY
OE
HSD1-
D- HSD1+
D+
GND
HSD2-
HSD2+
µCONTROLLER
USB
HIGH-SPEED
OR
FULL-SPEED
TRANSCEIVER
#1
USB
HIGH_SPEED
OR
FULL-SPEED
TRANSCEIVER
#2
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. 2009. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL54222
www.TDaetasStheCeti4rUc.cuoimts and Waveforms
VDD
LOGIC
INPUT
0V
SWITCH
INPUT
VINPUT
SWITCH
OUTPUT 0V
50%
tOFF
VOUT
90%
tON
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
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
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 FN6835.0
February 9, 2009
5 Page 
ISL54222
www.TDaytapSihceaetl4UP.ceormformance Curves TA = +25°C, Unless Otherwise Specified (Continued)
VDD = 1.8V
TIME SCALE (10ns/DIV)
FIGURE 14. EYE PATTERN: 12Mbps WITH USB SWITCHES IN THE SIGNAL PATH
VDD = 3.3V
TIME SCALE (10ns/DIV)
FIGURE 15. EYE PATTERN: 12Mbps WITH USB SWITCHES IN THE SIGNAL PATH
11
FN6835.0
February 9, 2009
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ISL54222.PDF ] | |
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