1997 Dec 01

6

Philips Semiconductors

Product specification

9-fold ESD transient voltage suppressor

BZA109

APPLICATION INFORMATION

Typical common anode application

A 9-fold transient suppressor in an SO20; SOT163-1 package makes it possible to protect nine separate lines using only

one package. Two simplified examples are shown in Figs 7 and 8.

Fig.7 Computer interface protection.

handbook, full pagewidth

GND

keyboard,

terminal,

printer,

etc.

I/O

BZA109

A

B

C

D

E

F

G

H

I

FUNCTIONAL

DECODER

MBK274

Fig.8 Microprocessor protection.

handbook, full pagewidth

MBK275

I/O

ROM

RAM

CPU

CLOCK

GND

VDD

VGG

data bus

control bus

address bus

4/9 BZA109