Upstream USB Port Terminator

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Elfreda Mathews
6 years ago
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1 Upstream Port Terminator Features One upstream port terminator, EMI filter and transient overvoltage protector in a single surfacemount package Compact SC70 or SOT3 package saves board space and lowers manufacturing costs compared to discrete solutions ESD protection to ±30k contact discharge per MIL-ST883D, method 30 ESD protection to ±k contact discharge per IEC international standard Lead-free version available Applications ESD protection and termination of port All peripherals (PC printers, scanners, zip drives, etc.) PDAs / handheld PCs Digital cameras Wireless Handets MP3 Players Cable Modems Product Description The PAC-U, PAC-U, and PAC-U3 are single-channel upstream-port termination networks. The PAC-U/U/U3 integrate EMI/RFI filter components and C, as recommended by the specification. Because these are upstream devices, they are terminated with a single.kω pull-up resistor to (R). There are three options for the value of the series resistor : For PAC-U, =Ω For PAC-U, =33Ω For PAC-U3, =Ω This series resistance plus the driver output resistance must be close to the cable s characteristic impedance of 4Ω (90Ω balanced) to minimize transmission line reflections. In addition, these parts provide a very high level of protection for sensitive electronic components that may be subjected to electrostatic discharge (ESD). The input and output pins are designed and characterized to dissipate ESD strikes of ±k safely, a level well beyond the maximum requirements of the IEC international standard. Using the MIL-ST883D (Method 30) specification for Human Body Model (HBM) ESD, all pins are protected for contact discharges to greater than ±30k. The PAC-U/U/U3 is housed in either a -pin SC70 or -pin SOT3 package and is available with optional lead-free finishing. Electrical Schematic D_i IN OUT D_c C R cc C i = input c = connector 3 4 D_i IN OUT D_c SC70 0/0/0 490 N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax:

2 PACKAGE / PINOUT DIAGRAMS D_i D_c D_i D_c UUx/ UxR UUxY/ UxYR D_i 3 4 D_c D_i 3 4 D_c -pin SC70 -pin SOT3 Note: Drawings are not to scale. Ordering Information PIN DESCRIPTIONS PIN NAME DESCRIPTION D_i The Controller side of the or bidirectional transmission line of the differential pair defined by standards. The ground reference for the PAC-U/U/U3 device. 3 D_i The Controller side of the or bidirectional transmission line of the differential pair defined by standards. 4 D_c The connector side of the or bidirectional transmission line of the differential pair defined by standards. The 3.3 supply voltage for the PAC-U/U/U3 device. D_c The connector side of the or bidirectional transmission line of the differential pair defined by standards. PART NUMBERING INFORMATION Standard FInish Note : Parts are shipped in Tape & Reel form unless otherwise specified. Lead-free Finish Ordering Part Ordering Part alue (Ω) Pins Package Number Part Marking Number Part Marking SC70- PAC-U UU PAC-UR UR SOT3- PAC-UY UUY PAC-UYR UYR 33 SC70- PAC-U UU PAC-UR UR 33 SOT3- PAC-UY UUY PAC-UYR UYR SC70- PAC-U3 UU3 PAC-U3R U3R SOT3- PAC-U3Y UU3Y PAC-U3YR U3YR 490 N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax: /0/0

3 Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNITS (Supply oltage). Operating Temperature Range -40 to +8 C Storage Temperature Range - to +0 C DC Power to Resistor 00 mw Package Power 00 mw STANDARD OPERATING CONDITIONS PARAMETER RATING UNITS (Supply oltage) 3.3 Ambient Operating Temperature -40 to +8 C 0/0/0 490 N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax:

4 Specifications (con t) ELECTRICAL OPERATING CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Resistance (PAC-U only) Measured at T A = C 8 Ω Resistance (PAC-U only) Measured at T A = C Ω Resistance (PAC-U3 only) Measured at T A = C 8 Ω R Resistance R Measured at T A = C...8 kω C Capacitance C Measured at MHz,.DC, pf T A = C I LEAK Diode Leakage Current to At 3.3DC and T A = C 00 na D Diode Reverse-biased Stand-off I = 0μA,T A = C. oltage D Signal Clamp oltage Positive Clamp Negative 0mA, T A = 0mA, T A = C ESD In-system ESD Withstand oltage Human Body Model, MIL-ST883, Method 30 Notes, ±30 k IEC , contact discharge method (I/O pins) Notes, ± k IEC , contact discharge method ( pin) Notes, ± k CLAMP Clamping oltage during ESD Discharge Positive Negative MIL-ST883, Method 30, 8k; Notes, 0 - Note : ESD applied to input/output/ pins with respect to, one at a time. Clamping voltage is measured at the opposite side of the EMI filter to the ESD pin (i.e., if ESD is applied to pin, then clamping voltage is measured at pin ). Unused pins are open. Note : These parameters guaranteed by design N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax: /0/0

5 Application Information The PAC-U/U/U3 is targeted for upstream ports (peripherals). It provides series termination, EMI filtering, and ESD protection for the two data lines and. The Specification revision. provides for two data rates: The Full Speed signaling bit rate at Mbits per second, and The Low Speed signaling bit rate at. Mbits per second. The speed is selected by connecting one of the data lines ( or ) to a 3.3 supply voltage via a.kω pull-up resistor (R). Connections for Full Speed Operation Full Speed devices have the pull-up resistor (R) connected to the data line, as shown in Figure. Pin is tied to the line of the controller. Pin is connected to the line on the connector. Connections for Low Speed Operation Low Speed devices have the pull-up resistor (R) connected to the data line, as shown in Figure. Pin is tied to the line of the controller; pin is connected to the line on the connector. PAC-Ux IN OUT D_i C R D_c 3.3 CONTROLLER C cc CONNECTOR 3 IN D_i SC70-4 OUT D_c Figure. Full Speed Connection PAC-Ux IN OUT D_i C R D_c 3.3 CONTROLLER C cc CONNECTOR 3 IN D_i SC70-4 OUT D_c Figure. Low Speed Connection 0/0/0 490 N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax:

6 Mechanical Details PAC-U/U/U3 devices are available in -pin SC70 and -pin SOT3 packages. Mechanical Package Diagrams SC70 Mechanical Specifications Dimensions for the PAC-U/U/U3 supplied in a SC70- package are presented below. TOP IEW e e For complete information on the SC70, see the California Micro Devices SC70 Package Information document. Pin Marking 4 E HE 3 Package PACKAGE DIMENSIONS MO-03 Issue A Pins Dimensions Min Millimeters Max A A A B c D.8. E..3 e 0. BSC HE L # per tape and reel 3000 pcs B SIDE IEW D A A A END IEW c L Package Dimensions for SC N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax: /0/0

7 Mechanical Details (continued) SOT3 Mechanical Specifications Dimensions for the PAC-U/U/U3 supplied in a SOT3- package are presented below. For complete information on the SOT3, see the California Micro Devices SOT3 Package Information document. Mechanical Package Diagrams TOP IEW e e 4 PACKAGE DIMENSIONS Pin Marking E E Package MO-78 3 Pins Dimensions Millimeters Inches Min Max Min Max b SIDE IEW A A D b c A D E E e 0.9 BSC BSC END IEW A e.90 BSC BSC L 0.0 REF 0.03 REF # per tape and reel 3000 pcs Controlling dimension: inches c L L Package Dimensions for SOT3-. 0/0/0 490 N. McCarthy Blvd., Milpitas, CA 903- Tel: Fax:

2 Channel Headset EMI Filter with ESD Protection

2 Channel Headset EMI Filter with ESD Protection Features Two channels of EMI filtering, one for a microphone and one for an earpiece speaker Pi-style EMI filters in a capacitor-resistor-capacitor (C-R-C)