KBMF01SC6 데이터 시트보기 (PDF) - STMicroelectronics

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KBMF01SC6

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

STMicroelectronics 

KBMFxxSC6

Fig. A7: Analog Crosstalk measurements configu-

ration

50 Ω TG OUT

Vg

TEST BOARD

KM1

RF IN

50 Ω

Fig. A8: Typical Analog Crosstalk measurement

crosstalk (dB)

0

-20

-40

-60

-80

-100

-120

1

10

100

F (MHz)

1,000

Figure A7 gives the measurement circuit for the analog crosstalk application. In figure A8, the curve shows

the effect of the Data line on the CLK line. In usual frequency range of analog signals (up to 100MHz) the

effect on disturbed line is less than -37dB.

Fig. A9: Digital crosstalk measurements configu-

ration

Fig. A10: Digital crosstalk measurements

Square

Pulse

Generator

5KHz

+5V

74HC04

Line 1

+5V

VG1

Line 2

+5V

74HC04

KBMF

01SC6

b21 VG1

Figure A9 shows the measurement circuit used to quantify the crosstalk effect in a classical digital applica-

tion.

Figure A10 shows that in such a condition signal from 0 to 5V and rise time of few ns, the impact on the

other line is less than 50mV peak to peak. (Below the logic high threshold voltage).The measurements per-

formed with falling edges gives the results within the same range.

6/8

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