Datasheet > USBDFXXW5_06

USBDFXXW5_06

更新时间： 2024-02-01 21:34:43

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
11页	154K
描述
EMI filter and line termination for USB downstream ports

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USBDFXXW5_06 数据手册

USBDFxxW5

EMI filter and line termination for USB downstream ports

Applications

EMI Filter and line termination for USB

downstream ports on:

■ Desktop computer

■ Notebooks

SOT323-5L

■ Workstations

■ USB Hubs

Functional diagram

Features

D+ Out

D+ In

Gnd

■ Monolithic device with recommended line

termination for USB downstream ports

■ Integrated Rt series termination and Ct

bypassing capacitors.

■ Integrated ESD protection

■ Small package size

D- In

D- Out

Description

R_t

R_d

C_t

The USB specification requires USB downstream

ports to be terminated with pull-down resistors

from the D+ and D- lines to ground. On the

implementation of USB systems, the radiated and

conducted EMI should be kept within the required

levels as stated by the FCC regulations. In

addition to the requirements of termination and

EMC compatibility, the computing devices are

required to be tested for ESD susceptibility.

USBDF01W5

USBDF02W5

Tolerance

33 Ω

15 Ω

15 kΩ

±10%

47 pF

±20%

±10%

Order codes

Part number

Marking

USBDF01W5

USBDF02W5

UD1

UD2

The USBDFxxW5 provides the recommended line

termination while implementing a low pass filter to

limit EMI levels and providing ESD protection

which exceeds IEC 61000-4-2 level 4 standard.

The device is packaged in a SOT323-5L, which is

a very small (50% smaller than the standard

SOT23).

Benefits

■ EMI / RFI noise suppression

■ Required line termination for USB downstream

ports

Complies with the following standards

■ ESD protection exceeding

IEC 61000-4-2, level 4 ±15 kV (air discharge)

±± kV (contact discharge)

IEC61000-4-2 level 4

■ IPAD™ technology provides high flexibility in

the design of high density boards

MIL STD ±±3C, Method 3015-6

Class 3 C = 100 pF R = 1500 W

3 positive strikes and 3 negative strikes (F = 1 Hz)

■ Tailored to meet USB 1.1 standard

TM: IPAD is a trademark of STMicroelectronics

September 2006

Rev 3

1/11

www.st.com

12 3 4 5 6 7...11

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