1/8

KBMFxxSC6

®

EMI FILTER AND LINE TERMINATION

FOR PS/2 MOUSE OR KEYBOARD PORTS

February 2002 - Ed : 1D

A.S.D.

™

SOT23-6L

FUNCTIONAL DIAGRAM

TM: ASD and TRANSIL are trademarks of STMicroelectronics.

EMI Filter and line termination for mouse and key-

board ports on:

- Desktop computers

- Notebooks

- Workstations

- Servers

MAIN APPLICATION

s

Integrated low pass filters for Data and Clock

lines

s

Integrated ESD protection

s

Integrated pull-up resistors

s

Small package size

s

FEATURES

On the implementation of computer 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

EMC compatibility, the computing devices are

required to tolerate ESD events and remain

operational without user intervention.

The KBMF implements a low pass filter to limit EMI

levels and provide ESD protection which exceeds

IEC 61000-4-2 level 4 standard. The device also

implements the pull up resistors needed to bias the

data and clock lines. The package is the

SOT23-6L which is ideal for situations where

board space is at a premium.

DESCRIPTION

s

EMI / RFI noise suppression

s

ESD protection exceeding IEC61000-4-2 level 4

s

High flexibility in the design of high density

boards

BENEFITS

Dat In

Clk In

Gnd

Dat Out

Clk Out

+Vcc

Rs

C

Rp

C

+Vcc

Rs

C

Rp

C

+Vcc

Rs

Rp

C

code 01

39

Ω

4.7k

Ω

120pF

Tolerance

±10%

±10%

±20%