MMQA, SZMMQA Quad Common Anode Series

http://onsemi.com

5

TYPICAL COMMON ANODE APPLICATIONS

A quad junction common anode design in a SC-74

package protects four separate lines using only one package.

This adds flexibility and creativity to PCB design especially

when board space is at a premium. A simplified example of

MMQA/SZMMQA Series Device applications is illustrated

below.

KEYBOARD

TERMINAL

PRINTER

ETC.

FUNCTIONAL

DECODER

I/O

A

MMQA/SZMMQA SERIES DEVICE

GND

B

C

D

Figure 9. Computer Interface Protection

I/O

RAM

ROM

CLOCK

CPU

CONTROL BUS

ADDRESS BUS

DATA BUS

GND

MMQA/SZMMQA

SERIES DEVICE

Figure 10. Microprocessor Protection