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TP120N

Tripolar protection for ISDN interfaces

STMicroelectronics 

TPI

Tripolar protection for ISDN interfaces

Features

■ Bidirectional triple crowbar protection

■ Peak pulse current:

IPP = 30 A , 10/1000 µs

■ Breakdown voltage:

– TPI80N: 80 V

– TPI120N: 120 V

■ Available in SO-8 package

■ Low dynamic breakover voltage:

– TPI8011N: 120 V

– TPI12011N: 170 V

Benefits

■ Low capacitance from lines to ground, allowing

high speed transmission without signal

attenuation

■ Good capacitance balance between lines to

ensure longitudinal balance

■ Fixed breakdown voltage in both common and

differential modes

■ The same surge current capability in both

common and differential modes

■ A particular attention has been given to the

internal wire bonding. The “4-point”

configuration ensures a reliable protection,

eliminating overvoltages introduced by the

parasitic inductances of the wiring (LdI/dt),

especially for very fast transient overvoltages

SO-8

Complies with following standards

■ CCITT K17-K20

– 10/700 µs, 1.5 kV

– 5/310 µs, 38 A

■ VDE 0433

– 10/700 µs, 2 kV

– 5/310 µs, 50 A

■ VDE 0878

– 1.2/50 µs, 1.5 kV

– 1/20 µs, 40 A

■ IEC 61000-4-2 level 4

– 0.5/700 µs, 1.5 kV

– 0.2/310 µs, 38 A

Description

Dedicated devices for ISDN interface and high

speed data telecom line protection. Equivalent to

a triple Trisil™ with low capacitance.

Figure 1. Functional diagram

Tip 1

GND 2

GND 3

Ring 4

8 Tip

7 GND

6 GND

5 Ring

TM: Trisil is a trademark of STMicroelectronics

November 2007

Rev 5

1/9

www.st.com

9

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