USB Downstream Port Terminator
PACUSB-D1/D2/D3
Features
•
A low-capacitance USB downstream port
terminator, EMI filter, and transient over-voltage
(ESD) protector in a single surface-mounted
package
ESD protection to +20kV contact discharge, per
MIL-STD-883D, Method 3015
ESD protection to +15kV contact discharge, per
IEC 61000-4-2 International Standard
Compact SOT23-5 and SC70-5 package options
save board space and lower manufacturing costs
compared to discrete solutions
Capacitors matched to a precision exceeding the
USB specification
Pin-compatible with ST Microelectronics
USBDFxxW5 USB Downstream Port Terminator
Lead-free versions available
Product Description
The PACUSB-D1/D2/D3 is a single-channel USB
downstream-port termination network. It integrates
EMI/RFI filter components R1 and C1, as
recommended by the USB specification as well as
the required 15kW pull-down resistors (R2) to GND.
In addition, PACUSB-D1/D2/D3 provides a very high
level of protection for sensitive electronic components
that may be subjected to electrostatic discharge
(ESD). The device pins will safely dissipate ESD
strikes of +15kV, exceeding the maximum
requirements of the IEC 61000-4-2 international
standard. Using the MIL-STD-883D (Method 3015)
specification for Human Body Model (HBM) ESD, all
pins are protected from contact discharges to +20kV.
There are three options for the value of the series
resistor R1: 15Ω, 22Ω, and 33Ω.
This series
resistance, plus the USB driver output resistance,
must be close to the USB cable’s characteristic
impedance of 45Ω (each side) to minimize
transmission line reflections.
The PACUSB-D1/D2/D3 is manufactured in a 5-pin
SC70 or a 5-pin SOT23 package and is available with
optional lead-free finishing..
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•
•
•
•
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Applications
•
•
•
•
•
ESD protection and termination of USB
downstream ports
Desktop PCs
Notebooks
Set-top boxes
USB hubs
©2010 SCILLC. All rights reserved.
June 2010 – Rev. 2
Publication Order Number:
PACUSB-D1/D2/D3/D
PACUSB-D1/D2/D3
Electrical•Schematic
PIN DESCRIPTIONS
PINS
1
2
3
4
5
NAME
D+ CNTR
GND
D- CNTR
D- CONN
D+ CONN
DESCRIPTION
D+ Data to the USB controller circuitry
Ground Pin
D- Data to the USB controller circuitry
D- Data to the USB connector
D+ Data to the USB connector
Rev. 2 | Page 2 of 10 | www.onsemi.com
PACUSB-D1/D2/D3
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Pins
5
R1 Value
15
Ω
22
Ω
33
Ω
5
15
Ω
22
Ω
33
Ω
SC70-5
Package
SOT23-5
Ordering Part
1
Number
PACUSB-D2Y5
PACUSB-D3Y5
PACUSB-D1Y5
PACUSB-D2YB5
PACUSB-D3YB5
PACUSB-D1YB5
Lead-free Finish
Ordering Part
1
Number
PACUSB-D2Y5R
PACUSB-D3Y5R
PACUSB-D1Y5R
PACUSB-D2YB5R
PACUSB-D3YB5R
PACUSB-D1YB5R
Part Marking
UDF2
UDF3
UDF1
DF2
DF3
DF1
Part Marking
DF2R
DF3R
DF1R
F2R
F3R
F1R
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Storage Temperature Range
Power Dissipation per Resistor
Package Power Dissipation
Voltage on any pin (DC)
RATING
-65 to +150
100
200
6
UNITS
°C
mW
mW
V
STANDARD OPERATING CONDITIONS
PARAMETER
Operating Temperature
RATING
-40 to +85
UNITS
°C
Rev. 2 | Page 3 of 10 | www.onsemi.com
PACUSB-D1/D2/D3
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
R1
PARAMETER
Resistance of R1 Resistor
(PACUSB-D2Y5/Y5R, -D2YB5/YB5R)
Resistance of R1 Resistor
(PACUSB-D3Y5/Y5R, -D3YB5/YB5R)
Resistance of R1 Resistor
(PACUSB-D1Y5/Y5R, -D1YB5/YB5R)
Resistance of R2 Resistor
Temperature Coefficient of
Resistance
Capacitance of C1 Capacitor
CONDITIONS
T
A
= 25°C
MIN
12
TYP
15
MAX
18
UNITS
Ω
Ω
Ω
R1
T
A
= 25°C
17.6
22
26.4
R1
T
A
= 25°C
26.4
33
39.6
R2
TCR
T
A
= 25°C
Note 1
15
+1300
kΩ
ppm/°
C
56.4
38.4
+2
pF
pF
%
nA
V
C1
0 VDC; 30 mVAC; 1MHz; 25°C
2.5 VDC; 30 mVAC; 1MHz; 25°C
37.6
25.6
47
32
TOL
CM
I
LEAK
V
RB
V
SIG
Matching Tolerance of C1 Capacitors
Diode Leakage Current to GND
Diode Reverse Bias Voltage
Signal Voltage:
Positive Clamp
Negative Clamp
In-system ESD Withstand Voltage
MIL-STD-883D, Method 3015
(HBM)
IEC 61000-4-2 Contact Discharge
1MHz; 25°C
Measured at 3.3 VDC, 25°C
I
LOAD
= 10μA; T
A
= 25°C
5.5
1
100
I
LOAD
= 10mA; T
A
= 25°C
I
LOAD
= 10mA; T
A
= 25°C
5.6
-0.4
6.8
-0.8
9.0
-1.5
V
V
V
ESD
Pins 1, 3; Notes 2 and 3
Pins 4, 5; Note 2
Pins 4, 5; Notes 2
MIL-STD-883D, Method 3015
+8kV; Note 4
MIL-STD-883D, Method 3015 -
8kV; Note 4
+4
+20
+15
12
kV
kV
kV
V
V
CL
Clamping voltage under ESD
discharge
-7
V
Note 1: Electrical operating characteristics guaranteed over standard operating conditions unless specified otherwise.
Note 2: ESD voltage applied to pins with respect to GND, one at a time; unused pins are left open.
Note 3: Pins 1 and 3 are not connected to the USB port connector, and therefore are not exposed to external ESD hazards.
Thus, they do not require the high ESD protection levels provided for pins 4 and 5.
Note 4: ESD Clamping Voltage is measured at the opposite end of R1 from the pin to which the ESD discharge is applied (e.g., if
ESD is applied to pin 6, then the clamping voltage is measured at pin 1).
Rev. 2 | Page 4 of 10 | www.onsemi.com
PACUSB-D1/D2/D3
Performance Information
Capacitance vs. Voltage
The C1 capacitance value as a function of DC voltage across it is presented in
Figure 1.
The curve is
normalized to a capacitance of 1.0 capacitance units at 2.5 VDC.
Figure 1. Diode Capacitance vs. DC Voltage (Normalized)
Insertion Loss vs. Frequency Characteristics
Figure 2. Insertion Loss vs. Frequency Performance Curve, PACUSB-D1(SOT23-6)
Rev. 2 | Page 5 of 10 | www.onsemi.com
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