80-0276-F Datasheet, PDF (2/5 Pages) List of Unclassifed Manufacturers – System Level ESD Mitigation

System Level ESD Mitigation
Vdd
SW1
USER_RESET
R1
100K
R2* 10K
C4
.1
D1
1N4148
RSC4000/4128
-RESET
D2*
1N4148
* Add for ESD protection
Design Note
Figure 2 – Reset ESD protection
5. (Desirable) Put 100 ohm series resistors on output pins if they travel to the outside or travel long distances
(with the exception of PWM pins). If adding 100 ohm series resistance causes the signal to slow or degrade
unacceptably, decrease the resistance or use an optoisolator or some other higher speed ESD protection
instead.
6. (Desirable) Put a 0.1uF capacitor across the supply pins on the board (not to be confused with decoupling
capacitors, which should be as close to IC's as possible.)
7. (Desirable) Put clamp diodes (such as1N4148) PWM as shown in Figure 2:
PWM0
PWM1
Vdd
Vdd
D1
1N4148
D1
1N4148
D2
1N4148
D2
1N4148
LS1
SPEAKER
Figure 3 - PWM ESD Protection
8. (Desirable) Put a clamp diode (such as1N4148) reverse biased across any power supply.
9. (Desirable) Put a high-frequency 1 kV capacitor between each power pin and chassis ground close to the
electronics.
10. (Desirable) If a battery enclosure is used, put a 0.1uF capacitor across the supply as close to the battery
connection as possible.
2
P/N 80-0276-F
© 2006 Sensory Inc.