Details, datasheet, quote on part number: KBMFxxSC6
PartKBMFxxSC6
CategoryUnsorted => IPAD (Integrated Passive and Active Discretes)->IP
TitleIPAD (Integrated Passive and Active Discretes)->IP
DescriptionEmi Filter And Line Termination For PS/2 Mouse or Keyboard Ports
CompanyST Microelectronics, Inc.
DatasheetDownload KBMFxxSC6 datasheet
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Features, Applications

EMI FILTER AND LINE TERMINATION FOR PS/2 MOUSE OR KEYBOARD PORTS

MAIN APPLICATION EMI Filter and line termination for mouse and keyboard 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. 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 at a premium. FEATURES Integrated low pass filters for Data and Clock lines Integrated ESD protection Integrated pull-up resistors Small package size Breakdown voltage: VBR = 6V min

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 = 150pF), level 15 kV (air discharge) 8 kV (contact discharge) MIL STD 883C, Method 3015-6 Class 1500 3 positive strikes and 3 negative strikes = 1 Hz)

ABSOLUTE MAXIMUM RATINGS (Tamb = 25C) Symbol VPP Tj Tstg TL Top Pr Parameter ESD discharge = 150pF contact discharge ESD discharge - MIL STD 883 - Method 3015-6 Junction temperature Storage temperature range Lead solder temperature (10 second duration) Operating temperature Range Power rating per resistor Value 70 100 Unit C mW

ELECTRICAL CHARACTERISTICS (Tamb = 25C) Symbol IR VBR VF Parameters Diode leakage current Diode breakdown voltage Diode forward voltage drop Test conditions VRM 6 0.9 Min Typ Max 10 Unit A V

TECHNICAL INFORMATION EMI FILTERING The KBMFxxSC6 ensure a filtering protection against ElectroMagnetic and RadioFrequency Interferences thanks to its low-pass filter structure. This filter is characterized by the following parameters : - cut-off frequency - Insertion loss - high frequency rejection Fig. A1: Measurements configuration Fig. A2: KBMFxxSC6 attenuation curve

ESD PROTECTION The KBMFxxSC6 is particularly optimized to perform ESD protection. ESD protection is based on the use of device which clamps at : Vouput = VBR + Rd.IPP This protection function is splitted in 2 stages. As shown in figure A3, the ESD strikes are clamped by the first stage S1 and then its remaining overvoltage is applied to the second stage through the resistor R. Such a configuration makes the output voltage very low at the Voutput level. Fig. A3: ESD clamping behavior


 

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