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PDF ISL54402 Data sheet ( Hoja de datos )
| Número de pieza | ISL54402 | |
| Descripción | (ISL54400 - ISL54402) USB/Audio Switches | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL54402 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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®
Data Sheet
ISL54400, ISL54401, ISL54402
July 12, 2006
FN6240.3
Low Voltage, Dual SPDT, USB/Audio
Switches with Negative Signal Capability
The Intersil ISL54400, ISL54401, ISL54402 dual SPDT
(Single Pole/Double Throw) switches combine low distortion
audio and accurate USB 2.0 full speed data signal switching
in the same low voltage device. When operated with a 2.5V 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 ISL54400 and ISL54401 incorporate circuitry for
detection of the USB VBUS voltage, which is used to switch
between the audio and USB signal source in the portable
device. In addition, the ISL54400 includes circuitry for
generation of a VTERM voltage of 3.3V for use with USB
speed setting pull-up resistor.
The ISL54400, ISL54401, ISL54402 are available in 10 Ld
3mm x 3mm TDFN and 10 Ld tiny 2.1mm x 1.6mm ultra-thin
µTQFN packages. They operate over a temperature range of
-40 to +85°C.
Related Literature
•www.DataSheet4U.com Application Note AN1255 “ISL5440XEVAL1Z 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
VBUS
VDD
ISL54400
D-/L
D+/R
Features
• Low Distortion Negative Signal Capability
• Detection of VBUS Voltage on USB Cable (ISL54400 and
ISL54401)
• Generation of VTERM Voltage for USB D+/D- Pull-up
Resistor (ISL54400)
• Low Distortion Headphone Audio Signals
- THD+N at 12mW into 32Ω Load . . . . . . . . . . . <0.007%
• Cross-talk (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . -110dB
• 1.8V Logic Compatible (ISL54402)
• Single Supply Operation (VDD)
- ISL54400 and ISL54401 . . . . . . . . . . . . . . 2.5V to 3.6V
- ISL54402 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8V to 5.5V
• Available in Ultra-thin µQFN and TDFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• MP3 and other Personal Media Players
• Cellular/Mobile Phones
• PDA’s
• USB Switching
• Audio/USB Switching
VTERM
D-
D+
L
R
USB
FULL-SPEED
TRANSCEIVER
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  
ISL54400, ISL54401, ISL54402
Absolute Maximum Ratings
VDD to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V
VBUS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V
Input Voltages
NOx, NCx, L, R (Note 2). . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V)
D+, D- (Note 2). . . . . . . . . . . . . . . . . . . . . -2V to ((VBUS) + 0.3V)
INx (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((VDD) + 0.3V)
Output Voltages (ISL54400 and ISL54401)
D-/L, D+/R (Note 2) Audio Mode . . . . . . . . -2V to ((VDD) + 0.3V)
D-/L, D+/R (Note 2) USB Mode . . . . . . . . -2V to ((VBUS) + 0.3V)
Output Voltages (ISL54402)
COMx (Note 2) . . . . . . . . . . . . . . . . . . . . . . -2V to ((VDD) + 0.3V)
Continuous Current (L, R, NCx, or COMx) . . . . . . . . . . . . . ±300mA
Peak Current (L, R, NCx, or COMx)
(Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . ±500mA
Continuous Current (D+, D-, NOx). . . . . . . . . . . . . . . . . . . . . ±40mA
Peak Current (D+, D-, NOx)
(Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . ±100mA
ESD Rating:
HBM COMx, D-/L, D+/R, VBUS . . . . . . . . . . . . . . . . . . . . . . .>4kV
HBM All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>4kV
MM COMx, D-/L, D+/R, VBUS . . . . . . . . . . . . . . . . . . . . . . .>500V
MM All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>300V
CDM (TDFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1kV
Thermal Information
Thermal Resistance (Typical, Note 3)
θJA (°C/W)
10 Ld 3x3 TDFN Package . . . . . . . . . . . . . . . . . . . .
80
10 Ld µQFN Package . . . . . . . . . . . . . . . . . . . . . . .
96
Maximum Junction Temperature (Plastic Package). . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . -65°C to 150°C
Operating Conditions
Temperature Range
ISL5440XIR and ISL5440XIRU . . . . . . . . . . . . . . . . . -40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
2. Signals on D+, D-, L, R, D-/L, D+/R, VBUS, NOx, NCx, COMx, INx, exceeding VDD or GND by specified amount are clamped. Limit forward
current through clamp to maximum current ratings.
3. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications - 2.7V to 5.5V Supply Test Conditions: VDD = +3.0V, GND = 0V, VBUSH = 3.8V, VBUSL = 3.2V,
VINH = 1.4V, VINL = 0.5V (Notes 4, 6), Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
TEMP (NOTE 5)
(NOTE 5)
(°C) MIN TYP MAX UNITS
ANALOG SWITCH CHARACTERISTICS
Audio Switches (L, R, NC1, NC2)
Analog Signal Range, VANALOG
Full -1.5
-
1.5 V
RON Matching Between Channels, VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, ICOM = 40mA, VL 25 - 0.02 0.12 Ω
∆RON
or VR or VNCx = Voltage at max RON over signal range of
-0.85V to 0.85V, (Note 9)
Full
-
- 0.15 Ω
RON Flatness, RFLAT(ON)
VDD = 3.0V, VBUS = 3.2V or VIN = 0.5V, ICOM = 40mA,
25
-
0.002
0.08
Ω
VL or VR or VNCx = -0.85V to 0.85V, (Note 7)
Full -
- 0.09 Ω
Discharge Pull-down Resistance, VDD = 3.6V, VBUS = 0V or VIN = 0.5V, VD-/L or VD+/R or 25
30
50
70 kΩ
RL, RR
VCOM = -0.85V, 0.85V, VL or VR or VNCx = -0.85V, 0.85V,
VD+ and VD- = floating, Measure current through the
discharge pull-down resistor and calculate resistance
value.
USB Switches (D+, D-, NO1, NO2)
Analog Signal Range, VANALOG
ON Resistance, RON , (ISL54400
and ISL54401 Only)
VDD = 3.6V, VBUS = 4.4V, ICOM = 40mA, VD+ or VD- = 0V
to VBUS, (See Figure 3)
Full
25
Full
-1.5
-
-
-
VBUS
V
5 6Ω
- 6.5 Ω
RON Matching Between Channels, VDD = 3.6V, VBUS = 4.4V, ICOM = 40mA, VD+ or
∆RON , (ISL54400 and ISL54401 VD- = Voltage at max RON, (Note 9)
Only)
25 -
Full -
0.2 0.4 Ω
- 0.45 Ω
5 FN6240.3
July 12, 2006
5 Page 
ISL54400, ISL54401, ISL54402
where the two SPDT switches work in tandem, the ISL54402
gives you independent control over each SPDT switch.
USB Switches
The two NO (normally open) USB switches (D+, D-, NOx)
are 5Ω bidirectional switches that are designed to pass low
speed and full-speed USB differential signals typically in the
range of 0V to 3.6V. The switches have low capacitance and
high bandwidth to pass USB full-speed signals (12Mbps)
with minimum edge and phase distortion to meet USB 2.0
signal quality specifications. See eye diagram Figure 11 on
page 13.
For the ISL54400 and ISL54401 parts, the maximum signal
range for the USB switches is from -1.5V to VBUS. The
signal voltage should not be allowed to exceed the VBUS
voltage rail or go below ground by more than -1.5V.
For the ISL54402 part, the maximum signal range is from
-1.5V to VDD. The signal voltage should not be allowed to
exceed the VDD voltage rail or go below ground by more
than -1.5V.
When using the ISL54400 and ISL54401 parts, the USB
switches are active (turned ON) whenever the VBUS voltage
is ≥ to VDD + 0.8V. VBUS is internally pulled low, so when
VBUS is floating the USB switches are OFF.
Note: Whenever the USB switches are ON the audio drivers
of the CODEC, connected at R and L (pins 6 and 7), need to
be at AC or DC ground or floating to keep from interfering
with the data transmission.
When using the ISL54402 part, the NO1 USB switch is
active (turned ON) whenever logic pin IN1 (pin 10) is HIGH.
The NO2 USB switch is active (turned ON) whenever the
logic pin IN2 (pin 2) is HIGH. Unlike the ISL54400 and
ISL54401 parts where the two SPDT switches work in
tandem, the ISL54402 gives you independent control over
each SPDT switch.
ISL54400 and ISL54401 Operation
The ISL54400 and ISL54401 function the same except the
ISL54401 does not have the VTERM feature. The discussion
that follows pertains to both devices and will discuss using the
parts in the typical application shown in the block diagram on
page 10.
LOGIC CONTROL
The state of the ISL54400 and ISL54401 devices are
determined by the voltage at the VBUS pin (pin 2). The VBUS
pin is internally pulled low and can be left floating.
If VBUS (pin 2) is floating or the VBUS voltage ≤ VDD + 0.2V
the part will be in the Audio mode. In Audio mode the L (left)
and R (right) 1Ω audio switches are ON and the D- and D+
5Ω switches are OFF (high impedance). In this state, power
to the part will be provided by the DC voltage connected at
the VDD pin (pin 1). In a typical application VDD will be in the
range of 2.5V to 3.6V and will be connected to the battery or
LDO of the MP3 player or cellphone. When a headphone is
plugged into the common connector, nothing gets connected
at the VBUS pin (it’s floating) and the ISL54400 and
ISL54401 parts remain in the audio mode and the MP3
player or cellphone audio drivers can drive the headphones
and play music.
If VBUS (pin 2) voltage is greater than VDD by 0.8V the part
will go into USB mode. In USB mode the D- and D+ 5Ω
switches are ON and the L and R 1Ω audio switches are
OFF (high impedance). In this state the part will be powered
by the voltage connected at the VBUS pin (pin 2). When a
USB cable from a computer or USB hub is connected at the
common connector the VBUS voltage is driven to between
4.4V and 5.25V. The ISL54400 and ISL54401 parts will go
into the USB mode. In USB mode the computer or USB hub
transceiver and the MP3 player or cellphone USB
transceiver are connected and digital data will be able to be
transmitted back and forth.
When the USB cable is disconnected the switch
automatically turns the D+ and D- switches OFF and turns
the L and R audio switches ON.
POWER
In audio mode the power supply connected at VDD (pin 1)
provides power to the ISL54400 and ISL54401 parts. Its
voltage should be kept in the range of 2.5V to 3.6V when
used in a USB/Audio application to ensure you get proper
switching when the VBUS voltage is at its lower limit of 4.4V.
In USB mode power for the ISL54400 and ISL54401 parts is
provided from the VBUS line from the host USB controller of
the computer or USB hub. Its voltage will be between 4.4V
and 5.25V.
VTERM OPERATION (ISL54400 ONLY)
When a USB cable from a computer is connected to a USB
device a VTERM voltage must be applied to a speed
indicating pull-up resistor to properly terminate the bus and
identify whether the USB device is a full-speed or low-speed
device to facilitate proper digital transmission. When the
cable is removed from the device this VTERM voltage must
be disconnected from the speed indicating pull-up resistor.
The ISL54400 device can perform this operation.
When VDD ≥ 2.5V and VBUS ≥ VDD + 0.8V, the VTERM pin
(pin 10) outputs an open circuit voltage equal to the voltage
at the VBUS pin. Otherwise the VTERM pin will be in a HI-Z
state.
The ISL54400 VTERM circuitry has an internal series resistor
approximately equal to 5.3kΩ. For a full speed USB
application, it is recommended you use a 3kΩ ±5% speed
indicating pull-up resistor. When the USB bus is in the idle
state, a 3kΩ ±5% resistor will put the D+ line voltage in the
range of 2.7V to 3.6V as required by the USB specification.
For low-speed USB application, it is recommended you use
11 FN6240.3
July 12, 2006
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet ISL54402.PDF ] | |
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