SBTF201-22.TC Ver la hoja de datos (PDF) - Semtech Corporation

Número de pieza

componentes Descripción

Lista de partido

SBTF201-22.TC

USB Downstream Port Filter & TVS For EMI Filtering and ESD Protection

Semtech Corporation 

STF201-22 & STF201-30

USB Downstream Port Filter & TVS

For EMI Filtering and ESD Protection

PROTECTION PRODUCTS

Description

The STF201 is a combination EMI filter and line termi-

nation device with integrated TVS diodes for use on

downstream USB ports. It is constructed using a

proprietary technology that allows passive components

and TVS diodes to be integrated in the same package.

Each device will provide termination, filtering, and ESD

protection for one downstream USB port. The STF201

is an easily implemented solution for meeting the

requirements of revision 1.1 of the Universal Serial Bus

specification.

USB line termination is achieved with series 22Ω or

30Ω resistors on both the D+ and D- USB lines. These

resistors preserve signal integrity by matching the cable

impedance to that of the differential driver. The 15kΩ

pull-down resistors complete the termination circuit on

each line. They are required by the USB specification

to identify the line as a downstream connection. The

47pF capacitors are used to bypass high frequency

energy to ground and for edge rate control of the USB

signals. Finally, the STF201 contains TVS diodes for

ESD protection of both (D+ & D-) data lines and the

voltage bus (V ). The TVS diodes provide effective

BUS

suppression of ESD voltages in excess of 15kV (air

discharge) and 8kV (contact discharge) per IEC 61000-

4-2, level 4.

The small size and integrated feature of the STF201

minimizes required board space and increases system

reliability. The pin-out of the device allows easy imple-

mentation. The STF201 is suitable for use in USB

hubs, computers, peripherals, and portable devices.

Features

‹ Bidirectional EMI/RFI filtering and line termination

with integrated ESD protection

‹ ESD protection for USB power (VBUS) and data lines

(D+ & D-) to IEC 61000-4-2 Level 4

‹ Filtering and termination for two USB data lines

‹ Different series resistors for impedance matching

‹ Low TVS operating voltage (5.25V)

‹ Low leakage current

‹ Low capacitance

‹ Solid-state technology

Mechanical Characteristics

‹ EIAJ SOT23-6L package

‹ Molding compound flammability rating: UL 94V-0

‹ Marking : Marking Code

‹ Packaging : Tape and Reel per EIA 481

Applications

‹ USB Hubs

‹ Portable electronics

‹ Printers

‹ Monitors

‹ Servers, Desktop, and Notebook computers

Circuit Diagram

Pin Configuration

Revision 08/11/04

S0T23-6L (Top View)

1

www.semtech.com

Share Link: