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KBMF

EMI FILTER AND LINE TERMINATION

FOR PS/2 MOUSE OR KEYBOARD PORTS

REV. 2

SOT23-6L

(Plastic)

October 2004

MAIN APPLICATIONS

EMI Filter and line termination for mouse and key-

board ports on:

FEATURES

lines

DESCRIPTION

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.

BENEFITS

boards

IPAD™

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%

Figure 1: Functional Diagram

Table 1: Order Code

Part Number

Marking

KBMF01SC6

KM1

TM: IPAD is a trademark of STMicroelectronics.

COMPLIES WITH THE FOLLOWING ESD

STANDARDS:

IEC 61000-4-2 (R = 330

Ω C = 150pF)

Level 4

±15 kV (air discharge)

±8 kV (contact discharge)

MIL STD 883C, Method 3015-6

Class 3

C = 100pF R = 1500

Ω

3 positive strikes and

3 negative strikes (F = 1 Hz)