PSMF15 datasheet(4/5 Pages) PROTEC

4 / 5 page

PSMF05

thru

PSMF24

05123.R10 3/07

www.protekdevices.com

APPLICATION NOTE

CIRCUIT BOARD LAYOUT RECOMMENDATIONS

Circuit board layout is critical for Electromagnetic

Compatibility (EMC) protection. The following

guidelines are recommended:

✔ The protection device should be placed near the

input terminals or connectors, the device will

divert the transient current immediately before it

can be coupled into the nearby traces.

✔ The path length between the TVS device and

the protected line should be minimized.

✔ All conductive loops including power and ground

loops should be minimized.

✔ The transient current return path to ground

should be kept as short as possible to reduce

parasitic inductance.

✔ Ground planes should be used whenever

possible. For multilayer PCBs, use ground vias.

The PSMF Series are TVS arrays designed to protect I/O or data lines from the damaging effects of ESD or EFT. This product provides unidirectional

protection, with a surge capability of 200 Watts P

PP per line for an 8/20µs waveform and ESD protection > 25 kilovolts.

UNIDIRECTIONAL COMMON-MODE CONFIGURATION (Figure 1)

The PSMF Series provides up to four (4) lines of protection in a common-mode configuration as depicted in Figure 1.

Circuit connectivity is as follows:

✔ I/O 1 is connected to Pin 1.

✔ I/O 2 is connected to Pin 3.

✔ I/O 3 is connected to Pin 4.

✔ I/O 4 is connected to Pin 5.

✔ Pin 2 is connected to ground.

Figure 1 - Unidirectional Configuration

Common-Mode I/O Port Protection

I/O 4

I/O 3

I/O 2

I/O 1

PSMF15 Datasheet(PDF) 4 Page - Protek Devices