BL1532—DPDT USB2.0 Analog Switch
Low-Power, Two-Port, High-Speed, USB2.0 (480Mbps)
DPDT Analog Switch BL1532
Description
The BL1532 is a Low-Power, Two-Port, High-Speed, USB2.0 (480Mbps) double –pole double-throw
(DPDT) Analog Switch featuring an On-Resistance of 4.5 ohm at VCC=3V and a Low On Capacitance
3.7pf Typical.
The BL1532 is compatible with the requirements of USB2.0 and the wide bandwidth needed to pass the
third harmonic, resulting in signals with minimum edge and phase distortion. Superior channel-to
channel crosstalk also minimizes interference. Break-before-make function for both parts eliminates
signal disruption during switching from preventing both switches being enabled simultaneously.
The BL1532 contains special circuitry on the switch I/O pins for applications where the VCC supply is
powered-off (VCC=0), which allows the device to withstand an over-voltage condition. This device is
designed to minimize current consumption even when the control voltage applied to the Sel pin is lower
than the supply voltage (VCC). This feature is especially valuable to ultra-portable applications, such as
cell phones, allowing for direct interface with the general purpose I/Os of the baseband processor. Other
applications include switching and connector sharing in portable cell phones, PDAs, digital cameras,
printers, and notebook computers.
Pin Configuration
OEb
8
VCC
9
Dp2
Dn2
7
6
BL1532
Sel 10
1
2
Dp
Dn
5
Dp1
4
Dn1
3
GND
UTQFN1.8×1.4-10L
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MSOP10L
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BL1532—DPDT USB2.0 Analog Switch
Features
Wide Power Supply Range: 2.3V to 5V
Low On Capacitance 3.7pf Typical
Low On Resistance 4.5Ω (typ) at 3V VDD when VSW=0.4V
High Bandwidth (-3db): >720MHz without CL and >550MHz with CL=5pF
Low Power Consumption: 1uA Maximum
ESD: pass 8kV HBM test
Over voltage tolerance (OVT) on all USB ports up to 5.25V without external components
TTL/CMOS Compatible
Break-Before-Make Switching
Operation Temperature Range: -40℃ to 85℃
UTQFN1.8×1.4-10L and MSOP10L Package
Applications
Cell phone, PDAs, Digital camera, Notebook, LCD Monitor, TV, SET-TOP BOX
Block Diagram
VCC
Dp1
Dp
Dp2
OEb
logic
Sel
Dn1
Dn
Dn2
GND
Function Table
OEb
Sel
Function
1
X
Disconnect
0
0
Dp, Dn=Dp1, Dn1
0
1
Dp, Dn=Dp2, Dn2
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BL1532—DPDT USB2.0 Analog Switch
Pin Description
PIN num
Pin Name
Type
Description
UTQFN10L
MSOP10L
1
3
Dp
Input/Output
USB Data BUS
2
4
Dn
Input/Output
USB Data BUS
3
5
GND
Ground
Ground
4
6
Dn1
Input/Output
Data Port
5
7
Dp1
Input/Output
Data Port
6
8
Dn2
Input/Output
Data Port
7
9
Dp2
Input/Output
Data Port
8
10
OEb
Input
Switch enable
9
1
VCC
PWR
Power Supply
10
2
Sel
Input
Switch select
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Units
DC Supply Voltage
VCC
-0.5
5.5
V
DC Switch Voltage
Dpn / Dnn / Dp / Dn
-0.5
VCC+ 0.3
V
DC Input Voltage
VOeb / VSel
-0.5
VCC
V
Continuous Current
I(Dpn/Dnn/Dp/Dn)
-50
+50
mA
Peak Current(1)
IPEAK(Dpn/Dnn/Dp/Dn)
-100
+100
mA
TA
-40
85
℃
Operating Temperature Range
Notes:
(1) Pulsed at 1ms, 50% duty circle
(2) Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device.
These are stress ratings only and operations of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications are not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
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BL1532—DPDT USB2.0 Analog Switch
ORDERING INFORMATION
SPECIFIED
MODEL
PIN- PACKAGE
TEMPERATURE
RANGE
BL1532TQFN
BL1532MSOP
UTQFN1.8×1.410L
MSOP10L
- 40°C to +85°C
- 40°C to +85°C
PACKAGE
PACKAGE OPTION
MARKING
HYW(1)
Tape and Reel,
3000
H1G
Tape and Reel,
YWW
3000
WHERE(1):
“HYW” IS 3 DIGITS PRODUCTION ID
COLOUR: LASER MARKING
“H” stands for the product BL1532.
“Y”stands for the product year, for example, “1” stands for the year 2011.
“W” stands for the product week, for example, “a” stands for the first week, “A” stands for the 27th
week.
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BL1532—DPDT USB2.0 Analog Switch
DC ELECTRICAL CHARACTERISTICS
Guaranteed Limit
Parameter
Symbol
Conditions
Min. Typ.(1) Max.
Unit
Analog Switch
Analog Signal Range
VPn/VNn/Vp/Vn
On-Resistance(2)
RON
On-Resistance Match Between
Channels(3)
0
VCC = 3V,VSW=0.4V,
ION=-8mA
VCC = 3V,VSW=0.4V,
△ RON
ION=-8mA
VCC
V
4.5
Ω
0.1
Ω
Current
Source Off Leakage Current
IPn / Nn (OFF)
Channel on Leakage Current
IPn / Nn (ON)
POWER OFF leakage current
IOFF
Quiescent supply current
ICC
Increase in ICC current per
VCC=3.6V,Vp/Vn= 3.6/0.3V,
VPn/VNn=0.3/3.6V
VCC=3.6V,Vp/Vn= 3.6/0.3V,
VPn/VNn=3.6/0.3V
VCC = 0V,VSW=0V to 3.6V,
Vcontrol=0 or VCC
-1
1
uA
-1
1
uA
-1
1
uA
1
uA
VCC=3V,
Vcontrol=0 or VCC, Iout=0
ICCT
VCC=3.6V, Vcontrol=2.6V
4
uA
IOEb /Sel
VOEb / Sel = 0 or VCC
1
uA
Input Voltage High
VIH
VCC = 3.0-3.6V
Input Voltage Low
VIL
VCC = 3.0-3.6V
control voltage and VCC
Input Leakage Current
Digital I/O
1.6
V
0.5
Note:
(1)
Typical characteristics are at +25°C
(2)
Measured by the voltage drop between Dpn/Dnn and Dp/Dn pins at the indicated
current through the switch. On resistance is determined by the lower of the voltage on
the two (Dpn/Dnn and Dp/Dn ports).
(3) △ RON= RON(MAX) – RON(MIN), between Dp and Dn .
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V
BL1532—DPDT USB2.0 Analog Switch
DYNAMIC CHARACTERISTICS
Guaranteed Limit
Parameter
Symbol
Conditions
Min. Typ. (1)
Unit
Max.
DRIVER CHARACTERISTICS
Turn-On Time
tON
VCC=3.3V, RL=50omh,
10
30
ns
20
25
ns
3
6.5
ns
CL=5pF, VSW=0.8V
Turn-Off Time
tOFF
VCC=3.3V, RL=50omh,
CL=5pF,VSW=0.8V
Break-Before-Make Time
tBBM
VCC=3.3V, RL=50omh,
2.0
CL=5pF,VSW1,2=0.8V
Propagation Dalay
tPD
VCC=3.3V, RL=50omh,
0.2
ns
1.5
pF
3.7
pF
2.0
pF
VCC = 3.3V,RL=50omh,CL=0pF
720
MHz
VCC = 3.3V,RL=50omh,CL=5pF
550
MHz
-30
dB
-35
dB
CL=5pF
CAPACITANCE
Control Capacitance
CIN
ON Capacitance
CON
OFF Capacitance
COFF
VCC=0V
VCC = 3.3V,OE=0V,
f=240MHz
VCC = 3.3V,OE=3.3V,
f=240MHz
APPLICATION CHARACTERISTICS
3dB Bandwidth
Off Isolation(2)
Channel crosstalk
f3dB
VIso
XTALK
VCC = 3.3V,
RL=50omh,f=250MHz
VCC = 3.3V,
RL=50omh,f=250MHz
Note:
(1) Typical characteristics are at 25°C
(2) Off Channel Isolation = 20log10 [(VP1\P2)/VP] or 20log10 [(VN1\N2)/VN]
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BL1532—DPDT USB2.0 Analog Switch
TEST SETUP CIRCUITS
V1
VCC
BL1532
VDp1/
VDn1
VDp/
VDn
VDp2/
VDn2
Ron=V1/8mA
8mA
GND
Figure1. Test Circuit for On Resister
VCC
VDp1/
VDn1/
VDp2/
VDn2
AC=1
BL1532
VDp/
VDn
Sel=0 or VCC
50 ohm
5pF
GND
Figure2. Test Circuit for Bandwidth
VCC
VDp1/
VDn1/
VDp2/
VDn2
AC=1
BL1532
VDp/
VDn
Sel=0 or VCC
50 ohm
GND
Figure3. Test Circuit for Off Isolation
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BL1532—DPDT USB2.0 Analog Switch
VCC
AC=1
VDp1/
VDp2/
VDp
VDn1/
VDn2
VDn
50 ohm
50 ohm
BL1532
Sel=0 or VCC
GND
Figure4. Test Circuit for Crosstalk
VDp1/
VDn1
VSW
VCC
BL1532
VDp/
VDn
VDp2/
VDn2
50 ohm
5pF
Sel=0 or VCC
GND
Trise = Tfall = 2.5ns
VOEb/VSel
50%
50%
90%
90%
VOUT
tON
tOFF
Test Circuit 5. Test Circuit for Switch Times
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BL1532—DPDT USB2.0 Analog Switch
VDp1/
VDn1
VSW
VSW
VCC
BL1532
VDp/
VDn
VDp2/
VDn2
50 ohm
5pF
Sel=0 or VCC
GND
Trise = Tfall = 2.5ns
VSel
50%
VOUT
90%
90%
tBBM
Test Circuit 5. Test Circuit for Break-Before-Make Time Delay, tBBM
BL1532
VDp1/
Trise = Tfall = 2.5ns VDn1/
VDp2/
VDn2
VCC
VDp/
VDn
50 ohm
5pF
Sel=0 or VCC
GND
400mV
50%
VIN
50%
0V
50%
50%
VOUT
t PDH
tPDL
Test Circuit 6. Test Circuit for Propagation Delay, tPD
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BL1532—DPDT USB2.0 Analog Switch
APPLICATION NOTE
Meeting USB 2.0 VBUS Short Requirements
(1) Power-Off Protection
For a VBUS short circuit the switch is expected to withstand such a condition for at least 24 hours. The
BL1532 has the specially designed circuit which prevents unintended signal bleed through as well as
guaranteed system reliability during a power-down, over-voltage condition. The protection has been
added to the common pins (Dp, Dn).
(2) Power-On Protection
The USB 2.0 specification also notes that the USB device should be capable of withstanding a VBUS
short during transmission of data. This modification works by limiting current flow back into the VCC
rail during the over-voltage event so current remains within the safe operating range.
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BL1532—DPDT USB2.0 Analog Switch
PACKAGE OUTLINE DIMENSIONS
UTQFN1.8×1.4-10L
1.400+/-0.050
1.800+/-0.050
PIN #1 DOT
BY MARKING
TOP VIEW
0.400+/-0.050 0.400TYP
(*9)
PIN #1 DEFINITION
CHAMFER 0.100*45。
0.550+/-0.050
0.500+/-0.050
0.8REF
0.200+/-0.050
BOTTOM VIEW
0.152REF
0.000-0.050
SIDE VIEW
NOTE: All linear dimensions are in millimeters.
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BL1532—DPDT USB2.0 Analog Switch
MSOP10L
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