KBMF Datasheet, PDF (1/8 Pages) STMicroelectronics – EMI FILTER AND LINE TERMINATION FOR PS/2 MOUSE OR KEYBOARD PORTS

®
IPAD™
KBMF
EMI FILTER AND LINE TERMINATION
FOR PS/2 MOUSE OR KEYBOARD PORTS
MAIN APPLICATIONS
EMI Filter and line termination for mouse and key-
board ports on:
■ Desktop computers
■ Notebooks
■ Workstations
■ Servers
FEATURES
■ Integrated low pass filters for Data and Clock
lines
■ Integrated ESD protection
■ Integrated pull-up resistors
■ Small package size
■ Breakdown voltage: V_BR = 6V min.
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.
SOT23-6L
(Plastic)
Table 1: Order Code
Part Number
KBMF01SC6
Marking
KM1
Figure 1: Functional Diagram
Dat In
+Vcc
Rp
Rs
CC
Dat Out
Gnd
Clk In
+Vcc
Rp
Rs
CC
+Vcc
Clk Out
Code 01
Tolerance
Rs
39Ω
±10%
Rp
4.7kΩ
±10%
C
120pF
±20%
BENEFITS
■ EMI / RFI noise suppression
■ ESD protection exceeding IEC61000-4-2 level 4
■ High flexibility in the design of high density
boards
COMPLIES WITH THE FOLLOWING ESD
STANDARDS:
IEC 61000-4-2 (R = 330Ω C = 150pF)
Level 4
±15 kV (air discharge)
±8 kV (contact discharge)
MIL STD 883C, Method 3015-6
Class 3
C = 100pF R = 1500Ω
3 positive strikes and
3 negative strikes (F = 1 Hz)
TM: IPAD is a trademark of STMicroelectronics.
October 2004
REV. 2
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