2006 California Micro Devices Corp. All rights reserved.
05/01/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
1
PACUSB-U1/U2/U3
Upstream USB Port Terminator
Features
One upstream USB port terminator, EMI filter and
transient overvoltage protector in a single surface-
mount package
Compact SC70 or SOT23 package saves board
space and lowers manufacturing costs compared
to discrete solutions
ESD protection to
30kV contact discharge per
MIL-STD-883D, method 3015
ESD protection to
15kV contact discharge per
IEC 61000-4-2 international standard
Lead-free version available
Applications
ESD protection and termination of USB port
All USB peripherals (PC printers, scanners,
zip drives, etc.)
PDAs / handheld PCs
Digital cameras
Wireless Handets
MP3 Players
Cable Modems
Product Description
The PACUSB-U1, PACUSB-U2, and PACUSB-U3 are
single-channel USB upstream-port termination net-
works.
The PACUSB-U1/U2/U3 integrate EMI/RFI filter com-
ponents R1 and C1, as recommended by the USB
specification. Because these are upstream USB
devices, they are terminated with a single 1.5k
pull-up
resistor to V
3.3
(R2).
There are three options for the value of the series
resistor R1:
For PACUSB-U1, R1=15
For PACUSB-U2, R1=33
For PACUSB-U3, R1=22
This series resistance plus the USB driver output resis-
tance must be close to the USB cable's characteristic
impedance of 45
(90 balanced) to minimize trans-
mission line reflections.
In addition, these parts provide a very high level of pro-
tection for sensitive electronic components that may be
subjected to electrostatic discharge (ESD). The input
and output pins are designed and characterized to dis-
sipate ESD strikes of
15kV safely, a level well beyond
the maximum requirements of the IEC 61000-4-2 inter-
national standard.
Using the MIL-STD-883D (Method 3015) specification
for Human Body Model (HBM) ESD, all pins are pro-
tected for contact discharges to greater than
30kV.
The PACUSB-U1/U2/U3 is housed in either a 6-pin
SC70 or 6-pin SOT23 package and is available with
optional lead-free finishing.
Vcc
SC70 6
R1
GND
IN1
OUT 1
OUT 2
IN2
1
2
3
C1
C1
R1
R2
6
5
4
D1_c
V
3.3
D2_c
GND
D1_i
D2_i
Electrical Schematic
i = input
c = connector
2006 California Micro Devices Corp. All rights reserved.
2
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
05/01/06
PACUSB-U1/U2/U3
Ordering Information
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
D1_i
The USB Controller side of the D+ or D- bidirectional transmission line of the differential
pair defined by USB standards.
2
GND
The ground reference for the PACUSB-U1/U2/U3 device.
3
D2_i
The USB Controller side of the D- or D+ bidirectional transmission line of the differential
pair defined by USB standards.
4
D2_c
The connector side of the D- or D+ bidirectional transmission line of the differential pair
defined by USB standards.
5
V
3.3
The 3.3V supply voltage for the PACUSB-U1/U2/U3 device.
6
D1_c
The connector side of the D+ or D- bidirectional transmission line of the differential pair
defined by USB standards.
PACKAGE / PINOUT DIAGRAMS
Note: Drawings are not to scale.
6-pin SC70
6-pin SOT23
D1_i
GND
D2_i
D1_c
V
3.3
D2_c
D1_i
GND
D2_i
D1_c
V
3.3
D2_c
1
2
6
5
3
4
UUx/
1
2
6
5
3
4
UUxY/
UxYR
UxR
PART NUMBERING INFORMATION
R1 Value (
)
Pins
Package
Standard FInish
Lead-free Finish
Ordering Part
Number
1
Part Marking
Ordering Part
Number
1
Part Marking
15
6
SC70-6
PACUSB-U1
UU1
PACUSB-U1R
U1R
15
6
SOT23-6
PACUSB-U1Y6
UU1Y
PACUSB-U1Y6R
U1YR
33
6
SC70-6
PACUSB-U2
UU2
PACUSB-U2R
U2R
33
6
SOT23-6
PACUSB-U2Y6
UU2Y
PACUSB-U2Y6R
U2YR
22
6
SC70-6
PACUSB-U3
UU3
PACUSB-U3R
U3R
22
6
SOT23-6
PACUSB-U3Y6
UU3Y
PACUSB-U3Y6R
U3YR
2006 California Micro Devices Corp. All rights reserved.
05/01/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
3
PACUSB-U1/U2/U3
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNITS
V
3.3
(Supply Voltage)
5.5
V
Operating Temperature Range
-40 to +85
C
Storage Temperature Range
-65 to +150
C
DC Power to Resistor
100
mW
Package Power
200
mW
STANDARD OPERATING CONDITIONS
PARAMETER
RATING
UNITS
V
3.3
(Supply Voltage)
3.3
V
Ambient Operating Temperature
-40 to +85
C
2006 California Micro Devices Corp. All rights reserved.
4
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
05/01/06
PACUSB-U1/U2/U3
Specifications (con't)
Note 1: ESD applied to input/output/V
3.3
pins with respect to GND, one at a time. Clamping voltage is measured at the opposite side
of the EMI filter to the ESD pin (i.e., if ESD is applied to pin 1, then clamping voltage is measured at pin 6). Unused pins are
open.
Note 2: These parameters guaranteed by design.
ELECTRICAL OPERATING CHARACTERISTICS
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R1
Resistance R1 (PACUSB-U1 only)
Measured at T
A
= 25C
12
15
18
R1
Resistance R1 (PACUSB-U2 only)
Measured at T
A
= 25C
26
33
40
R1
Resistance R1 (PACUSB-U3 only)
Measured at T
A
= 25C
18
22
26
R2
Resistance R2
Measured at T
A
= 25C
1.2
1.5
1.8
k
C1
Capacitance C1
Measured at 1 MHz, 2.5VDC,
T
A
=25C
38
47
56
pF
I
LEAK
Diode Leakage Current to GND
At 3.3VDC and T
A
= 25C
1
100
nA
V
D1
Diode Reverse-biased Stand-off
Voltage
I = 10
A,T
A
= 25C
5.5
V
V
D2
Signal Clamp Voltage
Positive Clamp
Negative Clamp
@ 10mA, T
A
= 25C
@ 10mA, T
A
= 25C
5.6
-1.2
6.8
-0.8
8.0
-0.4
V
V
V
ESD
In-system ESD Withstand Voltage
Human Body Model, MIL-STD-883,
Method 3015
IEC 61000-4-2, contact discharge
method (I/O pins)
IEC 61000-4-2, contact discharge
method (V
3.3
pin)
Notes 1,2
Notes 1,2
Notes 1,2
30
15
25
kV
kV
kV
V
CLAMP
Clamping Voltage during ESD
Discharge
Positive
Negative
MIL-STD-883, Method 3015, 8kV;
Notes 1,2
10
-5
V
V
2006 California Micro Devices Corp. All rights reserved.
05/01/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
5
PACUSB-U1/U2/U3
Application Information
The PACUSB-U1/U2/U3 is targeted for upstream USB
ports (peripherals). It provides series termination, EMI
filtering, and ESD protection for the two USB data lines
D+ and D-.
The USB Specification revision 1.1 provides for two
data rates:
The Full Speed signaling bit rate at 12 Mbits per
second, and
The Low Speed signaling bit rate at 1.5 Mbits per
second.
The speed is selected by connecting one of the data
lines (D+ or D-) to a 3.3V supply voltage via a 1.5k
pull-up resistor (R2).
Connections for Full Speed Operation
Full Speed devices have the pull-up resistor (R2) con-
nected to the D+ data line, as shown in
Figure 1
. Pin1
is tied to the D+ line of the USB controller. Pin 6 is con-
nected to the D+ line on the USB connector.
Connections for Low Speed Operation
Low Speed devices have the pull-up resistor (R2) con-
nected to the D- data line, as shown in
Figure 2
. Pin 1
is tied to the D- line of the USB controller; pin 6 is con-
nected to the D- line on the USB connector.
Figure 1. Full Speed Connection
Figure 2. Low Speed Connection
USB
CONNECTOR
Vcc
SC70-6
R1
GND
IN1
OUT 1
OUT 2
IN2
1
2
3
C1
C1
R1
R2
6
5
4
D1_i
GND
D2_i
D2_c
D1_c
V
3.3
USB
CONTROLLER
3.3V
D+
D-
D+
D-
GND
PACUSB-Ux
USB
CONNECTOR
Vcc
SC70-6
R1
GND
IN1
OUT 1
OUT 2
IN2
1
2
3
C1
C1
R1
R2
6
5
4
D1_i
GND
D2_i
D2_c
D1_c
V
3.3
USB
CONTROLLER
3.3V
D-
D+
D-
D+
GND
PACUSB-Ux
2006 California Micro Devices Corp. All rights reserved.
6
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
05/01/06
PACUSB-U1/U2/U3
Mechanical Details
PACUSB-U1/U2/U3 devices are available in 6-pin
SC70 and 6-pin SOT23 packages.
SC70 Mechanical Specifications
Dimensions for the PACUSB-U1/U2/U3 supplied in a
SC70-6 package are presented below.
For complete information on the SC70, see the Califor-
nia Micro Devices SC70 Package Information docu-
ment.
Package Dimensions for SC70-6.
PACKAGE DIMENSIONS
Package
MO-203 Issue A
Pins
6
Dimensions
Millimeters
Min
Max
A
0.80
1.10
A1
0.00
0.10
A2
0.70
1.00
B
0.15
0.30
c
0.08
0.25
D
1.85
2.25
E
1.15
1.35
e
0.65 BSC
HE
2.00
2.40
L
0.26
0.46
# per
tape and reel
3000 pcs
Mechanical Package Diagrams
TOP VIEW
1
2
3
6
5
4
e
e
B
A
SIDE VIEW
L
END VIEW
D
A2
A1
c
E HE
Pin 1
Marking
2006 California Micro Devices Corp. All rights reserved.
05/01/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.cmd.com
7
PACUSB-U1/U2/U3
Mechanical Details (continued)
SOT23 Mechanical Specifications
Dimensions for the PACUSB-U1/U2/U3 supplied in a
SOT23-6 package are presented below.
For complete information on the SOT23 , see the Cali-
fornia Micro Devices SOT23 Package Information doc-
ument.
Package Dimensions for SOT23-6.
PACKAGE DIMENSIONS
Package
MO-178
Pins
6
Dimensions
Millimeters
Inches
Min
Max
Min
Max
A
--
1.45
--
0.057
A1
0.00
0.15
0.000
0.006
b
0.30
0.50
0.012
0.020
c
0.08
0.22
0.003
0.009
D
2.75
3.05
0.108
0.120
E
2.60
3.00
0.102
0.118
E1
1.45
1.75
0.057
0.069
e
0.95 BSC
0.0374 BSC
e1
1.90 BSC
0.0748 BSC
L
0.60 REF
0.0236 REF
# per tape
and reel
3000 pcs
Controlling dimension: inches
Mechanical Package Diagrams
TOP VIEW
A
SIDE VIEW
D
A1
L1
END VIEW
c
L
1
2
3
6
5
4
e1
e
E1 E
b
Pin 1
Marking
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