Document
NUF2221W1
USB Upstream Terminator with ESD Protection
This device is designed for applications requiring Line Termination, EMI Filtering and ESD Protection. It is intended for use in upstream USB ports, Cellular phones, Wireless equipment and computer applications. This device offers an integrated solution in a small package (SC−88/SOT−363) reducing PCB space and cost.
Features
• Provides USB Line Termination, Filtering and ESD Protection • Single IC Offers Cost Savings • Bi−directional EMI Filtering Prevents Noise from Entering/Leaving
the System
• Compliance with IEC61000−4−2 (Level 4)
25 kV (Contact) 30 kV (Air)
• Flexible Pull−up Line Termination to Meet USB 1.1 Low Speed and
High Speed Specification
• ESD Ratings: Machine Model = C
ESD Ratings: Human Body Model = 3B
• This is a Pb−Free Device
Benefits
• SC−88 Package Minimizes PCB Space • Integrated Circuit Increases System Reliability versus Discrete
Component Implementation
• TVS Devices Provide ESD Protection That is Better than a Discrete
Implementation because the Small IC minimizes Parasitic Inductances
Typical Applications
• USB Hubs • Computer Peripherals Using USB
MAXIMUM RATINGS (TA = 25°C)
Rating
Symbol
Value
Unit
Steady State Power
PD
225
mW
Maximum Junction Temperature TJ(max)
125
°C
Operating Temperature Range
TJ
−55 to +125
°C
Storage Temperature Range
Tstg
−55 to +125
°C
Lead Solder Temperature (10 second duration)
TL
260
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
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CIRCUIT DESCRIPTION
D1(c) 6
VBUS 5
D2(c) 4
Rup
Rs
C1
C1
Rs
1 D1(i)
2 GND
3 D2(i)
SC−88 / SOT−363
CASE 419B
1
PLASTIC
MARKING DIAGRAM
6 022 M G G
1
022 = Specific Device Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
RS (W) Pkg
Shipping†
NUF2221W1T2G 22 SC−88
3000 /
(Pb−Free) Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2008
1
November, 2008 − Rev. 0
Publication Order Number: NUF2221W1/D
NUF2221W1
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Device
VRWM (Volts)
VBR @ 1 mA (Volts)
Min Typ Max
IR @ 3.3 V (nA)
Min Typ Max
Line Capacitance Vdc = 2.5 V f = 1 MHz pF (Note 1)
Min Typ Max
Series Resistor RS (W)
Min Typ Max
Pull−up Resistor Rup (kW)
Min Typ Max
NUF2221W1
5.25 5.6 6.8 8.0 − 10 100 37.6 42 56.4 17.6 22 26.4 1.2 1.5 1.8
1. Measured between pins 1, 3, 4, 6 and ground with pin 5 also grounded. 2. For other resistance values (e.g. 15 W, 33 W), please contact your local ON Semiconductor sales representative.
TYPICAL CHARACTERISTICS
RS (W) (dB)
RUP (W)
0
−5
−10
−15
−20
−25
Temp = 25°C
−30
0.10
1.00
10.00
100.00
FREQUENCY (MHz)
1000.00
Figure 1. Insertion Loss Characteristics
24.5
1600
24.0
RS = Typical
1580
RUP = Typical
1560 23.5
1540 23.0
1520
22.5 1500
22.0
1480
21.5
1460
−20 −10 0 10 20 30 40 50 60 70
−20 −10 0 10 20 30 40 50 60 70
TEMPERATURE (°C) Figure 2. RS versus Temperature
TEMPERATURE (°C) Figure 3. RUP versus Temperature
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NUF2221W1
APPLICATIONS BACKGROUND
What is USB? The USB is not a serial port, it is a serial bus, a fact that
enables a single port on the computer to be a link for a myriad of devices, (up to 127 devices in a USB system). We can easily chain one device to another and use one port as a connecting point of many devices by using a hub. All these enable us to look at the USB system as a small network of devices.
The Universal Serial Bus (USB) makes connecting devices to your computer faster, easier and virtually limitless. High−Speed USB devices are capable of communicating at speeds up to 12 megabytes−without shutting down and without having to open your computer.
Typical USB System
Monitor
Telephone
Scanner Printer
HUB
Computer PC CPU
KeyBoard
Plotter Mouse
devices, handling the power management for devices that are bus−powered (get power from the bus), and responsibility for bus error detection and recovery. Another important role of the hub is to manage both full and low speed devices. When a device is attached to the system the hub detects the speed, which the device operates in, and through the whole communication on the bus prevents from full speed traffic to reach low seed device and vice versa – prevent from low speed traffic to reach full speed device.
The Device The Device is defined as everything in the USB system,
which is not a host (including hubs). A device provides one or more USB functions. Most of the.