KBMF01SC6 STMicroelectronics

KBMF EMI FILTER AND LINE TERMINATION FOR PS/2 MOUSE OR KEYBOARD PORTS IPAD MAIN APPLICATIONS EMI Filter and line termination for mouse and key- board ports on: Desktop computers Notebooks Workstations Servers FEATURES SOT23-6L Integrated low pass filters for Data and Clock (Plastic) lines Integrated ESD protection Table 1: Order Code Integrated pull-up resistors Small package size Part Number Marking Breakdown voltage: V = 6V min. KBMF01SC6 KM1 BR DESCRIPTION Figure 1: Functional Diagram On the implementation of computer systems, the +Vcc radiated and conducted EMI should be kept within Rp Rs Dat In Dat Out the required levels as stated by the FCC C C regulations. In addition to the requirements of EMC compatibility, the computing devices are Gnd +Vcc required to tolerate ESD events and remain +Vcc Rp operational without user intervention. Rs The KBMF implements a low pass filter to limit EMI Clk In Clk Out C C 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 Rs Rp C the data and clock lines. The package is the Code 01 39 4.7k 120pF SOT23-6L which is ideal for situations where Tolerance 10% 10% 20% board space is at a premium. COMPLIES WITH THE FOLLOWING ESD BENEFITS STANDARDS: EMI / RFI noise suppression IEC 61000-4-2 (R = 330 C = 150pF) ESD protection exceeding IEC61000-4-2 level 4 Level 4 15 kV (air discharge) High flexibility in the design of high density 8 kV (contact discharge) boards MIL STD 883C, Method 3015-6 Class 3 C = 100pF R = 1500 3 positive strikes and 3 negative strikes (F = 1 Hz) TM: IPAD is a trademark of STMicroelectronics. October 2004 REV. 2 1/8KM1 KBMF Table 2: Absolute Maximum Ratings (T = 25C) amb Symbol Parameter Value Unit 12 ESD discharge R = 330W C = 150pF contact discharge V kV PP ESD discharge - MIL STD 883 - Method 3015-6 25 T Junction temperature 150 C j T Storage temperature range - 55 to +150 C stg T Lead solder temperature (10 second duration) 260 C L T Operating temperature Range 0 to 70 C op P Power rating per resistor 100 mW r Table 3: Electrical Characteristics (T = 25C) amb Symbol Parameters Test conditions Min Typ Max Unit I Diode leakage current V = 5.0V 10 A R RM V I = 1mA Diode breakdown voltage 6V BR R V I = 50mA Diode forward voltage drop 0.9 V F F TECHNICAL INFORMATION 1. 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 Figure 2: Measurements configuration Figure 3: KBMF attenuation curve Insertion loss (dB) 0 -10 TEST BOARD TG OUT RF IN 50 -20 Vg 50 -30 -40 1 10 100 1000 F (MHz) 2/8