KBMFxxSC6
®
EMI FILTER AND LINE TERMINATION
FOR PS/2 MOUSE OR KEYBOARD PORTS
A.S.D.
MAIN APPLICATION
EMI Filter and line termination for mouse and key-
board ports on:
- Desktop computers
- Notebooks
- Workstations
- Servers
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.
SOT23-6L
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.
FUNCTIONAL DIAGRAM
+Vcc
Rp
Rs
Dat Out
+Vcc
Dat In
Gnd
C
C
FEATURES
■
Integrated low pass filters for Data and Clock
lines
+Vcc
Rp
■
■
■
■
Integrated ESD protection
Integrated pull-up resistors
Small package size
Rs
Clk In
Clk Out
C
C
Breakdown voltage: VBR = 6V min
BENEFITS
■
■
■
EMI / RFI noise suppression
ESD protection exceeding IEC61000-4-2 level 4
High flexibility in the design of high density
boards
Rs
Rp
C
120pF
±20%
code 01
Tolerance
39Ω
4.7kΩ
±10%
±10%
TM: ASD and TRANSIL are trademarks of STMicroelectronics.
February 2002 - Ed : 1D
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