8/11

EMIF03-SIM01

CROSSTALK BEHAVIOR

Fig. A7: Crosstalk phenomena

αβ

1G1

12G2

V+

V

αβ

2G2

21G1

V+

V

Line 1

Line 2

DRIVERS

RECEIVERS

The crosstalk phenomena are due to the coupling between 2 lines. The coupling factor (

β12 or β21 )

increases when the gap across lines decreases, particularly in silicon dice. In the example above the

the line 2. This phenomenon has to be taken into account when the drivers impose fast digital data or

high frequency analog signals in the disturbing line. The perturbed line will be more affected if it works

with low voltage signal or high load impedance (few k

Ω).

1- Digital crosstalk

Fig. A8: Digital crosstalk measurements

+3V

+3V

74HC04

+3V

Square

Pulse

Generator

74HC04

V

B1

C1

B3

C3

®

EMI35

SIM01

Square pulse generator

s

frequency = 3.3MHz

s

0 - 3.3V

s

Risetime = 30ns