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SPUSB1BJT Datasheet(PDF) 1 Page - Littelfuse |
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SPUSB1BJT Datasheet(HTML) 1 Page - Littelfuse |
1 / 3 page 217 www .littelfuse .com 5 TVS Diode Arrays Upstream USB Port Terminator with ESD Suppression & EMI Filtering The Littelfuse SPUSB1 Series is a multifunctional USB port protection network designed to provide ESD protection, EMI/RFI filtering and line termination for a single USB 1.1 port. The SPUSB1 can replace a mini- mum of ten typically larger “discrete” devices resulting in inventory and placement cost savings. The SPUSB1 Series combines Transient Voltage Suppression (TVS) avalanche diodes, EMI/RFI filtering components (R1 and C1), and a1.5kΩ termination resistor (R2). The filtering components are included to satisfy recommendations in the USB 1.1 specification, and the 1.5kΩ resistor (R2) is included as a pull-up resistor to VBUS. The SPUSB1 Series can be used for termination and protection of“upstream” USB devices such as PDAs, digital cameras, scanners and hubs which are often at risk from transient voltage surges and electromagnetic interference from both internal and external sources. To support a wide range of circuit conditions, Littelfuse offers three resistance values for the series resistor (R1). The series resistance plus the USB driver output resistance must be close to the USB cable’s char- acteristic impedance of 45Ω (90Ω balanced) to minimize transmission line reflections. Circuit Diagram Features • One upstream USB port terminator, EMI filter and transient overvoltage protector in a single surface-mount package • Compact SC70 package saves board space and lowers manufacturing costs compared to discrete solutions • ESD protection to 30kV contact discharge per MIL-STD- 883D, method 3015 • ESD protection to 15kV contact discharge per IEC 61000-4-2 international standard Applications • Desktop/Laptop PCs • USB peripherals (printers, scanners, zip drives) • PDAs / wireless handsets • Digital cameras • MP3 Players • Cable Modems Ordering Information 2 C1 GND 1 3 C1 5 6 4 R2 R1 R1 VBUS SC70-6 DEVICE BRAND UFA UFB UFC PKG TYPE SC70-6 SC70-6 SC70-6 #/REEL 3000 3000 3000 C1 (pF) 47 47 47 PART NUMBER SPUSB1AJT SPUSB1BJT SPUSB1CJT R1 (Ohm) 12 22 33 R2 (KOhm) 1.5 1.5 1.5 SPUSB1 Series |
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