PACUSB-D3

• A low-capacitance USB downstream port terminator, EMI filter, and transient over-voltage (ESD) protector in a single surface-mounted package
• ESD protection to ±20kV contact discharge, per MIL-STD-883D, Method 3015
• ESD protection to ±15kV contact discharge, per IEC 61000-4-2 International Standard
• Compact SOT23-5 and SC70-5 package options save board space and lower manufacturing costs compared to discrete solutions
• Capacitors matched to a precision exceeding the USB specification
• Pin-compatible with ST Microelectronics USBDFxxW5 USB Downstream Port Terminator
• Lead-free versions available

The PACUSB-D3 is a single-channel USB downstream-port termination network. PACUSB-D3 integrates EMI/RFI filter components R1 and C1, as recommended by the USB specification as well as the required 15k pull-down resistors (R2) to GND. In addition, PACUSB-D1/D2/D3 provides a very high level of protection for sensitive electronic components that may be subjected to electrostatic discharge (ESD). PACUSB-D3 pins will safely dissipate ESD strikes of ±15kV, exceeding the maximum requirements of the IEC 61000-4-2 international standard. Using the MIL-STD-883D (Method 3015) specification for Human Body Model (HBM) ESD, all pins are protected from contact discharges to ±20kV.

There are three options for the value of the series resistor R1: 15, 22, and 33. This series of PACUSB-D3 resistance, plus the USB driver output resistance, must be close to the USB cable&primes characteristic impedance of 45 (each side) to minimize transmission line reflections.

The PACUSB-D1/D2/D3 is manufacured in a 5-pin SC70 or a 5-pin SOT23 package and is available with optional lead-free finishing.

Note: Some of the devices listed here have suggested replacements available. Please see additional information at the end of this page.