09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

PACUSB-D1/D2/D3

USB Downstream Port Terminator

Features

A low-capacitance USB downstream port termina-
tor, 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

Applications

ESD protection and termination of USB
downstream ports

Desktop PCs

Notebooks

Set-top boxes

USB hubs

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 recom-
mended by the USB specification as well as the
required 15k

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: 15

, 22, and 33. This series resis-

tance, plus the USB driver output resistance, must be
close to the USB cable's characteristic impedance of
45

(each side) to minimize transmission line reflec-

tions.

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.

Electrical Schematic

GND

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

09/14/04

PACUSB-D1/D2/D3

Ordering Information

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.

PIN DESCRIPTIONS

PINS

NAME

DESCRIPTION

D+ CNTR

D+ Data to the USB controller circuitry

GND

Ground Pin

D- CNTR

D- Data to the USB controller circuitry

D- CONN

D- Data to the USB connector

D+ CONN

D+ Data to the USB connector

PACKAGE / PINOUT DIAGRAMS

Note 1: The "n" shown in part markings above represents either the digit "1," "2," or "3."

5-pin SOT23

D+ CNTR

GND

D- CNTR

D+ CONN

D- CONN

UD
F
n
/

Top View

5-pin SC70

DFn /

Top View

Note 2: SOT23 and SC70 package sizes may differ. These drawings are not to scale.

PACUSB-D1Y5/-D2Y5/-D3Y5

PACUSB-D1YB5/-D2YB5/-D3YB5

D+ CNTR

GND

D- CNTR

D+ CONN

D- CONN

DF
nR

-D1Y5R/-D2Y5R/-D3Y5R

-D1YB5R/-D2YB5R/-D3YB5R

PART NUMBERING INFORMATION

Pins

R1 Value

Package

Standard Finish

Lead-free Finish

Ordering Part

Number

Part Marking

Ordering Part

Number

Part Marking

SOT23-5

PACUSB-D2Y5

UDF2

PACUSB-D2Y5R

DF2R

PACUSB-D3Y5

UDF3

PACUSB-D3Y5R

DF3R

PACUSB-D1Y5

UDF1

PACUSB-D1Y5R

DF1R

SC70-5

PACUSB-D2YB5

DF2

PACUSB-D2YB5R

F2R

PACUSB-D3YB5

DF3

PACUSB-D3YB5R

F3R

PACUSB-D1YB5

DF1

PACUSB-D1YB5R

F1R

09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

PACUSB-D1/D2/D3

Specifications

ABSOLUTE MAXIMUM RATINGS

PARAMETER

RATING

UNITS

Storage Temperature Range

-65 to +150

°C

Power Dissipation per Resistor

100

Package Power Dissipation

200

Voltage on any pin (DC)

STANDARD OPERATING CONDITIONS

PARAMETER

RATING

UNITS

Operating Temperature

-40 to +85

°C

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

09/14/04

PACUSB-D1/D2/D3

Specifications (cont'd)

Note 1: Electrical operating characteristics guaranteed over standard operating conditions unless specified otherwise.
Note 2: Guaranteed by design and characterization.
Note 3: ESD voltage applied to pins with respect to GND, one at a time; unused pins are left open.
Note 4: 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 5: 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).

ELECTRICAL OPERATING CHARACTERISTICS

(SEE NOTE 1)

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Resistance of R1 Resistor
(PACUSB-D2Y5/Y5R, -D2YB5/YB5R)

= 25°C

Resistance of R1 Resistor
(PACUSB-D3Y5/Y5R, -D3YB5/YB5R)

= 25°C

17.6

26.4

Resistance of R1 Resistor
(PACUSB-D1Y5/Y5R, -D1YB5/YB5R)

= 25°C

26.4

39.6

Resistance of R2 Resistor

= 25°C

TCR

Temperature Coefficient of Resistance Note 1

+1300

ppm/

°C

Capacitance of C1 Capacitor

0 VDC; 30 mVAC; 1MHz; 25°C

37.6

56.4

2.5 VDC; 30 mVAC; 1MHz; 25°C

25.6

38.4

TOL

Matching Tolerance of C1 Capacitors

1MHz; 25°C

LEAK

Diode Leakage Current to GND

Measured at 3.3 VDC, 25°C

100

Diode Reverse Bias Voltage

LOAD

= 10

A; T

= 25°C

5.5

SIG

Signal Voltage:

Positive Clamp
Negative Clamp

LOAD

= 10mA; T

= 25°C

LOAD

= 10mA; T

= 25°C

5.6

-0.4

6.8

-0.8

9.0

-1.5

V
V

ESD

In-system ESD Withstand Voltage

MIL-STD-883D, Method 3015
(HBM)
IEC 61000-4-2 Contact Discharge

Pins 1, 3; Notes 2,3 and 4
Pins 4, 5; Notes 2 and 3
Pins 4, 5; Notes 2 and 3

+20
+15

kV
kV
kV

Clamping voltage under ESD
discharge

MIL-STD-883D, Method 3015
+8kV; Notes 2 and 5

MIL-STD-883D, Method 3015 -
8kV; Notes 2 and 5

-7

09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.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 normal-

ized 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)

DC Voltage

r
m

a
l
i
z
e
d

C1 Ca

t
a
n

c
e

1.0

1.2

1.4

1.6

0.8

0.6

0.4

0.2

09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

PACUSB-D1/D2/D3

Application Information

The PACUSB-D1/D2/D3 provides a complete interface
for a single downstream USB port typically found in
computers and USB hubs. It integrates the series
resistors (R1) and the 15k

pull-down resistors (R2)

for both USB data lines (D+ and D-) as well as the
capacitors to ground for EMI suppression. Zener
diodes provide ESD protection up to 15kV contact dis-

charge per the IEC 61000-4-2 standard and protect the
USB controller on both data lines.

The PACUSB-D1/D2/D3 should be placed on the PCB
between the USB controller and the USB connector, as
shown on the Connection Diagram

Figure 5

Figure 5. Connection Diagram for PACUSB-D1/D2/D3 Devices

To guarantee the best ESD and filtering performance,
it is recommended to physically locate the PACUSB-
D1/D2/D3 close to the USB connector. Also, the trace
lengths between the PACUSB-D1/D2/D3 and the USB
controller should be kept as short as possible.

DOWN-

USB

CONTROLLER

PACUSB-DnY5/Y5R, -DnYB5/YB5R

D+

D-

D+

D-

STREAM

CONNECTOR

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

09/14/04

PACUSB-D1/D2/D3

Mechanical Details

PACUSB-D1/D2/D3 devices are packaged in SOT23-5

and SC70-5 packages.

SOT23-5 Mechanical Specifications:
Dimensions for PACUSB-D1/D2/D3 devices packaged
in a 5-pin SOT23 package are presented below.

For complete information on the SOT23-5 package,
see the California Micro Devices SOT23 Package
Information document.

* This is an approximate amount which may vary.

Package Dimensions for SOT23-5.

PACKAGE DIMENSIONS

Package

SOT23-5 (JEDEC name is MO-178)

Pins

Dimensions

Millimeters

Inches

Min

Max

Min

Max

1.45

0.057

0.00

0.15

0.000

0.006

0.30

0.50

0.012

0.020

0.08

0.22

0.003

0.009

2.75

3.05

0.108

0.120

2.60

3.00

0.102

0.118

1.45

1.75

0.057

0.069

0.95 BSC

0.0374 BSC

1.90 BSC

0.0748 BSC

0.30

0.60

0.0236 0.024

0.60 REF

0.024 REF

# per tape

and reel

3000 pieces*

Controlling dimension: millimeters

Mechanical Package Diagrams

TOP VIEW

E1 E

SIDE VIEW

END VIEW

09/14/04

430 N. McCarthy Blvd., Milpitas, CA 95035-5112

Tel: 408.263.3214

Fax: 408.263.7846

www.calmicro.com

PACUSB-D1/D2/D3

Mechanical Details (continued)

SC70-5 Mechanical Specifications:
Dimensions for PACUSB-D1/D2/D3 devices packaged
in a 5-pin SC70 package are presented below.

For complete information on the SC70-5 package, see
the California Micro Devices SC70 Package Informa-
tion document.

* This is an approximate amount which may vary.

Package Dimensions for SC70-5.

PACKAGE DIMENSIONS

Package

SC70-5

(JEDEC name is MO-203 Issue A)

Pins

Dimensions

Millimeters

Min

Max

0.80

1.10

0.00

0.10

0.70

1.00

0.15

0.30

0.08

0.25

1.85

2.25

1.15

1.35

0.65 BSC

2.00

2.40

0.26

0.46

# / bag

1000 pieces*

# / tape and reel

3000 pieces*

Mechanical Package Diagrams

TOP VIEW

E HE

SIDE VIEW

END VIEW

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