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PDF ISL54227 Data sheet ( Hoja de datos )
| Número de pieza | ISL54227 | |
| Descripción | High-Speed USB 2.0 (480Mbps) DPST Switch | |
| Fabricantes | Intersil | |
| Logotipo |  |
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High-Speed USB 2.0 (480Mbps) DPST Switch with
Overvoltage Protection (OVP) and Dedicated
Charger Port Detection
ISL54227
The Intersil ISL54227 is a single supply, dual SPST
(Single Pole/Single Throw) switch that is configured as a
DPST. It can operate from a single 2.7V to 5.25V supply.
The part was designed for switching or isolating a USB
high-speed source or a USB high-speed and full-speed
source in portable battery powered products.
The 3.5Ω SPST switches were specifically designed to
pass USB full speed and USB high speed data signals.
They have high bandwidth and low capacitance to pass
USB high speed data signals with minimal distortion.The
device has two logic control input pins (OE and LP) to
control the SPST switches.
The ISL54227 has OVP detection circuitry on the COM
pins to open the SPST switches when the voltage at
these pins exceeds 3.8V or goes negative by -0.45V. It
isolates fault voltages up to +5.25V or down to -5V from
getting passed to the other side of the switch, thereby
protecting the USB down-stream transceiver. It has an
alarm indicator output pin (ALM) to indicate when the
part is in the overvoltage condition.
The part has an interrupt (INT) output pin to indicate a
1 to 1 (high/high) state on the COM lines to inform the
µprocessor when entering a dedicated charging port
mode of operation.
The ISL54227 is available in 10 Ld 1.8mmx1.4mm
µTQFN and 10 Ld 3mmx3mm TDFN packages. It
operates over a temperature range of -40 to +85°C.
Features
• High-Speed (480Mbps) and Full-Speed (12Mbps)
Signaling Capability per USB 2.0
• 1.8V Logic Compatible (2.7V to +3.6V supply)
• Alarm Overvoltage Indicator Output
• Charger Interrupt Indicator Output
• Low Power State
• Power OFF Protection
• COM Pins Overvoltage Detection and Protection for
+5.25V and -5V Fault Voltages
• -3dB Frequency . . . . . . . . . . . . . . . . . . . . 790MHz
• Low ON Capacitance @ 240MHz . . . . . . . . . . . . 2pF
• Low ON-Resistance . . . . . . . . . . . . . . . . . . . . 3.5Ω
• Single Supply Operation (VDD) . . . . . 2.7V to 5.25V
• Available in µTQFN and TDFN Packages
• Pb-Free (RoHS Compliant)
• Compliant with USB 2.0 Short Circuit and
Overvoltage Requirements without Additional
External Components
Applications*(see page 16)
• MP3 and other Personal Media Players
• Cellular/Mobile Phones, PDA’s
• Digital Cameras and Camcorders
• USB Switching
Typical Application
3.3V
500Ω
VDD
VBUS
D- COM-
OVP
D+ COM+
GND ISL54227
INT
LOGIC
CONTROL
ALM
LP
OE
µP
D-
USB
HIGH-SPEED
TRANSCEIVER
D+
GND
USB 2.0 HS Eye Pattern with
Switches in the Signal Path
TIME SCALE (0.2ns/DIV)
July 2, 2010
FN7593.0
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. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL54227
www.DataSheet4U.com
Electrical Specifications - 2.7V to 5.25V Supply Test Conditions: VDD = +3.3V, GND = 0V, VLP = GND, VOEH = 1.4V,
VOEL = 0.5V, (Note 10), Unless Otherwise Specified. Boldface limits apply over the operating temperature range,
-40°C to +85°C. (Continued)
PARAMETER
TEST CONDITIONS
TEMP
MIN
MAX
(°C) (Notes 11, 12) TYP (Notes 11, 12) UNITS
Overvoltage Protection Detection
Positive Fault-Protection Trip VDD = 2.7V to 5.25V, OE = VDD
Threshold, VPFP
(See Table 1 on page 2)
Negative Fault-Protection Trip VDD = 2.7V to 5.25V, OE = VDD
Threshold, VNFP
(See Table 1 on page 2)
OFF Persistance Time
Fault Protection Response
Time
Negative OVP Response: VDD = 2.7V,
SEL = 0V or VDD, OE/ALM = VDD,
VDx = 0V to -5V, RL = 1.5kΩ
Positive OVP Response: VDD = 2.7V,
SEL = 0V or VDD, OE/ALM = VDD,
VDx = 0V to 5.25V, RL = 1.5kΩ
ON Persistance Time
Fault Protection Recovery
Time
VDD = 2.7V, OE = VDD, VDx = 0V to 5.25V
or 0V to -5V, RL = 1.5kΩ
25
25
25
25
25
3.62
-0.6
-
3.8
-0.45
102
3.95
-0.29
-2
- 45
V
V
ns
µs
µs
DYNAMIC CHARACTERISTICS
Turn-ON Time, tON
VDD = 3.3V, VINPUT = 3V, RL = 50Ω,
CL = 50pF (see Figure 1)
Turn-OFF Time, tOFF
VDD = 3.3V, VINPUT = 3V, RL = 50Ω,
CL = 50pF (see Figure 1)
Skew, (tSKEWOUT - tSKEWIN) VDD = 3.3V, OE = 3.3V, RL = 45Ω,
CL = 10pF, tR = tF = 500ps at 480Mbps,
(Duty Cycle = 50%) (see Figure 5)
25
25
25
- 160 -
- 60 -
- 50 -
ns
ns
ps
Rise/Fall Degradation
(Propagation Delay), tPD
Crosstalk
VDD = 3.3V, OE = 3.3V, RL = 45Ω,
CL = 10pF, (see Figure 5)
VDD = 3.3V, RL = 50Ω, f = 240MHz
(see Figure 4)
25
25
- 250 -
- -39 -
ps
dB
OFF-Isolation
VDD = 3.3V, OE = 0V, RL = 50Ω,
f = 240MHz
25 - -23 -
dB
-3dB Bandwidth
OFF Capacitance, COFF
Signal = 0dBm, 0.86VDC offset,
RL = 50Ω
f = 1MHz, VDD = 3.3V, LP = 0V, OE = 0V
(see Figure 3)
25
25
- 790 -
- 2.5 -
MHz
pF
COM ON Capacitance, C(ON) f = 1MHz, VDD = 3.3V, LP = 0V,
OE = 3.3V, (see Figure 3)
25 - 4 - pF
COM ON Capacitance, C(ON) f = 240MHz, VDD = 3.3V, LP = 0V,
25
-
2
-
pF
OE = 3.3V
POWER SUPPLY CHARACTERISTICS
Power Supply Range, VDD
Positive Supply Current, IDD VDD = 5.25V, OE = 5.25V, LP = GND
Full
25
Full
2.7
-
-
5.25
45 56
- 59
V
µA
µA
Positive Supply Current, IDD VDD = 3.6V, OE = 3.6V, LP = GND
25
-
23 30
µA
Full -
- 34 µA
Positive Supply Current, IDD VDD = 3.6V, OE = 0V, LP = VDD
(Low Power State)
25 -
Full -
5 6 µA
- 10 µA
5 FN7593.0
July 2, 2010
5 Page 
ISL54227
www.DataSheet4U.com
The OE and LP pins are internally pulled low through a
4MΩ resistor to ground and can be tri-stated or left
floating.
The ISL54227 is designed to minimize IDD current
consumption when the logic control voltage is lower than
the VDD supply voltage. With VDD = 3.6V and the OE
logic pin is at 1.4V the part typically draws only 25µA.
With VDD = 4.3V and the OE logic pin is at 2.6V the part
typically draws only 35µA. Driving the logic pin to the
VDD supply rail minimizes power consumption.
The OE and LP pin can be driven with a voltage higher
than the VDD supply voltage. It can be driven up to
5.25V with a VDD supply in the range of 2.7V to 5.25V.
TABLE 2. LOGIC CONTROL VOLTAGE LEVELS
VDD SUPPLY LOGIC = “0” (LOW)
RANGE OE LP
LOGIC = “1”
(HIGH)
OE LP
2.7V to 3.6V
≤ 0.5V
or
floating
≤ 0.5V
or
floating
≥1.4V
≥1.4V
3.7V to 4.2V
≤ 0.7V
or
floating
≤ 0.7V
or
floating
≥1.7V
≥1.7V
4.3V to 5.25V
≤ 0.8V
or
floating
≤ 0.8V
or
floating
≥2.0V
≥2.0V
Low Power Mode
If the OE pin = Logic “0”, and the LP pin = Logic “1” the
switches will turn OFF (high impedance) and the part
will be put in a low power mode. In this mode the part
draws only 10µA (max) of current across the operating
temperature range.
Normal Operation Mode
With a signal level in the range of 0V to 3.6V and with
the LP pin = Logic “0” the switches will be ON when the
OE pin = Logic “1” and will be OFF (high impedance)
when the OE pin = Logic “0”.
USB 2.0 VBUS Short Requirments
The USB specification in section 7.1.1 states a USB
device must be able to withstand a VBUS short (4.4V to
5.25V) or a -1V short to the D+ or D- signal lines when
the device is either powered off or powered on for at
least 24 hours.
The ISL54227 part has special power-off protection and
OVP detection circuitry to meet these short circuit
requirements. This circuitry allows the ISL54227 to
provide protection to the USB down-stream transceiver
connected at its signal pins (D-, D+) to meet the USB
specification short circuit requirements.
The power-off protection and OVP circuitry allows the
COM pins (COM-, COM+) to be driven up to 5.25V or
down to -5V while the VDD supply voltage is in the range
of 0V to 5.25V. In these overvoltage conditions with a
500Ω external VDD resistor the part draws <55µA of
current into the COM pins and causes no stress/damage
to the IC. In addition all switches are OFF and the
shorted VBUS voltage will be isolated from getting
through to the other side of the switch channels, thereby
protecting the USB transceiver.
Typical Performance Curves TA = +25°C, Unless Otherwise Specified
3.4 16
ICOM = 17mA
3.3
2.7V
ICOM = 17mA
14
12
3.2 3.0V
3.3V
3.1 3.6V
4.3V
3.0 5.25V
2.9
0
0.1 0.2 0.3
VCOM (V)
0.4
FIGURE 9. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
10
2.7V
8
3.0V
6
4
2
5.25V
3.3V
0
0 0.6 1.2 1.8 2.4 3.0 3.6
VCOM (V)
FIGURE 10. ON-RESISTANCE vs SUPPLY VOLTAGE vs
SWITCH VOLTAGE
11 FN7593.0
July 2, 2010
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ISL54227.PDF ] | |
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