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. CIRCUIT DESCRIPTION Features • Provides USB Line Termination, Filtering and ESD Protection • Single IC Offers Cost Savings • Bi−directional EMI Filtering Prevents Noise from Entering/Leaving • • • • http://onsemi.com 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 D1(c) VBUS D2(c) 6 5 4 Rup Rs C1 1 2 3 D1(i) GND D2(i) SC−88 / SOT−363 CASE 419B PLASTIC Benefits • SC−88 Package Minimizes PCB Space • Integrated Circuit Increases System Reliability versus Discrete 1 Component Implementation MARKING DIAGRAM • TVS Devices Provide ESD Protection That is Better than a Discrete Implementation because the Small IC minimizes Parasitic Inductances 6 022 M G G Typical Applications • USB Hubs • Computer Peripherals Using USB 1 022 = Specific Device Code G = Pb−Free Package (Note: Microdot may be in either location) MAXIMUM RATINGS (TA = 25°C) Rating Symbol Value Unit PD 225 mW 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 Steady State Power Maximum Junction Temperature 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. © Semiconductor Components Industries, LLC, 2008 November, 2008 − Rev. 0 Rs C1 1 ORDERING INFORMATION Device RS (W) NUF2221W1T2G 22 Pkg Shipping† SC−88 (Pb−Free) 3000 / 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. Publication Order Number: NUF2221W1/D NUF2221W1 ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted) Device NUF2221W1 VBR @ 1 mA (Volts) Line Capacitance Vdc = 2.5 V f = 1 MHz pF (Note 1) IR @ 3.3 V (nA) Series Resistor RS (W) Pull−up Resistor Rup (kW) VRWM (Volts) Min Typ Max Min Typ Max Min Typ Max Min Typ Max Min Typ Max 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 0 −5 (dB) −10 −15 −20 −25 −30 0.10 Temp = 25°C 1.00 10.00 100.00 1000.00 FREQUENCY (MHz) Figure 1. Insertion Loss Characteristics 1600 24.5 RS = Typical 1560 23.5 1540 RUP (W) RS (W) RUP = Typical 1580 24.0 23.0 1520 22.5 1500 22.0 21.5 −20 1480 −10 0 10 20 30 40 50 60 1460 −20 −10 70 TEMPERATURE (°C) 0 10 20 30 40 50 TEMPERATURE (°C) Figure 2. RS versus Temperature Figure 3. RUP versus Temperature http://onsemi.com 2 60 70 NUF2221W1 APPLICATIONS BACKGROUND What is USB? 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 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. 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 devices provide only one function but there may be some, which provides more than one and called compound devices. We refer to two kinds of devices − self powered or bus powered devices. A device that gets its power from the bus is called bus powered and on the other hand a device which supplies its own power is called self powered. There are two kinds of devices for USB 1.1: Full−speed devices − operates in 12 Mb/s Low−speed devices that work in 1.5 Mb/s. Typical USB System Monitor Scanner Telephone Computer PC CPU Plotter KeyBoard Mouse HUB Printer NUF2221W1 Device Information The Universal Serial Bus (USB) specification revision 1.1 requires the USB drivers to have certain impedance characteristics. The series resistance plus the USB driver output resistance must be close to the USB cable’s impedance of 45 W unbalanced (90 W balance) to minimize transmission line reflections. In addition USB 1.1 also requires upstream ports to be terminated with a pull−up resistor (usually 1.5 kW) from D+ or D− lines to VCC=3.3 V (VCC is usually taken from VBUS by using a 5 V − 3.3 V regulator). In case of EMI, the radiated and conducted EMI should be kept within the required levels as specified by the FCC regulations. Actual FCC regulations requires that class B computing devices meet the specifications of maximum levels for both radiated and conducted EMI (Radiated EMI covers the frequency range from 30 MHz to 1 GHz and Conducted EMI covers the 450 kHz to 30MHz range). The NUF2221W1 device from On Semiconductor provides series termination, EMI filtering and ESD protection for the two data lines (D+, D−) as well as for the VBUS. The ESD device’s ratings comply with IEC61000−4−2 (Level 4), HBM class 3B and MM class C. All these features are offered in an integrated solution placed Figure 4. Typical USB System Typically the USB system consists of one host, hubs and devices. The Host The host in the USB system, is responsible to the whole complexity of the protocol (simplifies the designing of USB devices). The host controls the media access, therefore, no one can access the bus unless it got an approval required from the host. The Hub The hub provides an interconnect point, which enables many devices to connect to a single USB port. The logical topology of the USB is a star structure, all the devices are connected (logically) directly to the host. It is totally transparent to the device what is its’ hub tier (the number of hubs the data has to flow through). The hub is connected to the USB host in the upstream direction (data flows ”up” to the host) and is connected to the USB device in the downstream direction (data flows ”down” from the host to the device). The hubs’ main functionality is the responsibility of detecting an attachment and detachment of http://onsemi.com 3 NUF2221W1 terminal 6. Finally, the input of the D− line is connected in the terminal 3 which outputs from the terminal 4. Figure 6 shows the connections of the NUF2221W1 device for “Full−Speed”. VBUS D2(C) 6 5 4 RUP RS RS C1 C1 1 D+ 0 2 RUP C1 6 D+ 3.3 V 5 C1 3 D− RS USB CONNECTOR D1(C) USB CONTROLLER in a small and single package (SC−88, Case 419B). The NUF2221W1 device is shown in the Figure 5. 4 RS D− Figure 6. Full Speed Connection D1(i) 2 GND 3 D2(i) Low−Speed Connection The Pull up resistor (RUP) is connected to the D− Line. The terminal 5 is connected to a 3.3 V voltage supply while the terminal 2 is connected to ground. The input of the D− line is connected in the terminal 1 which outputs from the terminal 6. Finally, the input of the D+ line is connected in the terminal 3 which outputs from the terminal 4. The Figure 7 shows the connections of the NUF2221W1 device for “Low−Speed”. Figure 5. Device Description Connection for Full− Speed and Low−Speed Devices The USB 1.1 specification calls for two data rates: • Full−speed devices − operates in 12 Mb/s • Low−speed devices that work in 1.5 Mb/s. The NUF2221W1 device can be shaped for either full−speed or low−speed by connecting one of the data lines (D+, D−) to a 3.3 V voltage supply through the 1.5 kW pull up resistor. The device’s connection diagrams for each speed are described as follows: USB CONTROLLER D− Full−Speed Connection The Pull up resistor (RUP) is connected to the D+ Line. The terminal 5 is connected to a 3.3 V voltage supply while the terminal 2 is connected to ground. The input of the D+ line is connected in the terminal 1 which outputs from the 1 0 D+ 2 RS RUP C1 D− 6 3.3 V 5 C1 3 RS 4 Figure 7. Low Speed Connection http://onsemi.com 4 D+ USB CONNECTOR 1 NUF2221W1 PACKAGE DIMENSIONS SC−88/SC70−6/SOT−363 CASE 419B−02 ISSUE W D e 6 5 4 1 2 3 HE DIM A A1 A3 b C D E e L HE −E− b 6 PL 0.2 (0.008) M E MILLIMETERS MIN NOM MAX 0.80 0.95 1.10 0.00 0.05 0.10 0.20 REF 0.10 0.21 0.30 0.10 0.14 0.25 1.80 2.00 2.20 1.15 1.25 1.35 0.65 BSC 0.10 0.20 0.30 2.00 2.10 2.20 INCHES NOM MAX 0.037 0.043 0.002 0.004 0.008 REF 0.004 0.008 0.012 0.004 0.005 0.010 0.070 0.078 0.086 0.045 0.049 0.053 0.026 BSC 0.004 0.008 0.012 0.078 0.082 0.086 MIN 0.031 0.000 M SOLDERING FOOTPRINT* A3 C A A1 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. 419B−01 OBSOLETE, NEW STANDARD 419B−02. 0.50 0.0197 L 0.65 0.025 0.65 0.025 0.40 0.0157 1.9 0.0748 SCALE 20:1 mm Ǔ ǒinches SC−88/SC70−6/SOT−363 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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