NUF2015W1 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. http://onsemi.com CIRCUIT DESCRIPTION Features: • Provides USB Line Termination, Filtering and ESD Protection • Single IC Offers Cost Savings • Bidirectional EMI Filtering Prevents Noise from Entering/Leaving D1(c) VBUS D2(c) 6 5 4 Rup the System • Compliance with IEC61000−4−2 (Level 4) • • • Rs 8 kV (Contact) 15 kV (Air) Flexible Pullup Line Termination to Meet USB 1.1 Low Speed and High Speed Specification ESD Ratings: Machine Model = C ESD Ratings: Human Body Model = 3B Pb−Free Package is Available Benefits: • SC−88 Package Minimizes PCB Space • Integrated Circuit Increases System Reliability versus Discrete 6 C1 1 2 3 D1(i) GND D2(i) 5 Implementation because the Small IC minimizes Parasitic Inductances 1 Value Unit PD 225 mW TJ(max) 125 Operating Temperature Range TJ Storage Temperature Range Lead Solder Temperature (10 second duration) 4 5W M G G 2 3 = Specific Device Code = Date Code = Pb−Free Package Device RS (W) Pkg. Shipping† °C NUF2015W1T2 15 SC−88 3000/Tape & Reel −55 to +125 °C NUF2015W1T2G 15 Tstg −55 to +125 °C 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. March, 2006 − Rev. 3 5 ORDERING INFORMATION Symbol © Semiconductor Components Industries, LLC, 2006 6 (Note: Microdot may be in either location) MAXIMUM RATINGS (TA = 25°C) Maximum Junction Temperature 3 SC−88 / SOT−363 CASE 419B PLASTIC 5W M G • USB Hubs • Computer Peripherals Using USB Rating 2 1 Applications: Steady State Power MARKING DIAGRAM 4 Component Implementation • TVS Devices Provide ESD Protection That is Better than a Discrete Rs C1 1 SC−88 3000/Tape & Reel (Pb−Free) †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Publication Order Number: NUF2015W1/D NUF2015W1 ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted) Device NUF2015W1T2 VBR @ 1 mA (V) Line Capacitance Vdc = 2.5 V f = 1 MHz (pF) (Note 1) IR @ 3.3 V (nA) Series Resistor RS (W) Pullup Resistor Rup (kW) VRWM (V) 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 33 42 51 12 15 18 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. 0 0 −5 −10 −10 −20 S41 (dB) S21 (dB) TYPICAL CHARACTERISTICS −15 −30 −20 −40 −25 −50 −30 1.E+06 1.E+07 1.E+08 1.E+09 −60 1.E+06 1.E+10 1.E+07 FREQUENCY (Hz) 1.E+08 1.E+09 FREQUENCY (MHz) Figure 1. Insertion Loss Characteristics (S21 Measurement) Figure 2. Analog Cross−Talk (S41 Measurement) 1600 16 RUP = Typical 1580 15.5 1560 1540 RUP (W) RS (W) 1.E+10 15 1520 1500 14.5 1480 14 −20 −10 0 10 20 30 40 TEMPERATURE (°C) 50 60 1460 −20 −10 70 Figure 3. RS vs. Temperature 0 10 20 30 40 TEMPERATURE (°C) 50 Figure 4. RUP vs. Temperature http://onsemi.com 2 60 70 NUF2015W1 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 NUF2015W1T2 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 pullup 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 NUF2015W1T2 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 futures are offered in an integrated solution placed in a small and single package (SC−88, Case 419B). The NUF2015W1T2 device is shown in the Figure 6. Figure 5. 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 NUF2015W1 D2(C) 5 4 RUP RS 0 2 RS RUP C1 6 D+ 3.3 V 5 C1 3 D− RS C1 C1 1 D+ USB CONNECTOR VBUS 6 USB CONTROLLER D1(C) 4 RS D− Figure 7. Full Speed Connection D1(i) 2 GND Low−Speed Connection 3 The pullup resistor (Rpu) 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 8 shows the connections of the NUF2015W1T2 device for “Low−Speed”. D2(i) Figure 6. 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. D− USB CONTROLLER The NUF2015W1T2 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 pullup resistor. The device’s connection diagrams for each speed are described as follows: Full−Speed Connection The pullup 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. Figure 7 shows the connections of the NUF2015W1T2 device for “Full−Speed”. 1 0 D+ 2 RS RUP C1 D− 6 3.3 V 5 C1 3 RS 4 Figure 8. Low Speed Connection http://onsemi.com 4 D+ USB CONNECTOR 1 NUF2015W1 PACKAGE DIMENSIONS SC−88/SC70−6/SOT−363 CASE 419B−02 ISSUE W NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. 419B−01 OBSOLETE, NEW STANDARD 419B−02. D e 6 5 DIM A A1 A3 b C D E e L HE 4 HE −E− 1 2 3 b 6 PL 0.2 (0.008) M E M 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 A3 C A A1 L SOLDERING FOOTPRINT* 0.50 0.0197 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. http://onsemi.com 5 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 NUF2015W1 ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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