1/9

Application Specific Discretes

A.S.D

.™

THBTxxx11D

®

n

BIDIRECTIONAL CROWBAR PROTECTION

BETWEEN TIP AND GND, RING AND GND

AND BETWEEN TIP AND RING.

n

PEAK PULSE CURRENT :

µs surge.

n

HOLDING CURRENT :

n

AVAILABLE IN SO8 PACKAGES.

n

LOW DYNAMIC BREAKOVER VOLTAGE.

FEATURES

SO-8

Dedicated

to

telecommunication

equipment

protection,

these

devices

provide

a

triple

bidirectional protection function.

They ensure the same protection capability with

the same breakdown voltage both in longitudinal

mode and transversal mode.

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.

Dynamic characteristics have been defined for

several types of surges, in order to meet the SLIC

maximum ratings.

DESCRIPTION

SCHEMATIC DIAGRAM

TRIPOLAR OVERVOLTAGE

PROTECTION FOR TELECOM LINE

October 2003 - Ed: 7A

TR-NWT-001089:

10/1000

µs

1000V

2/10

µs

2500V

(first level)

2/10

µs

5000V

(second level)

with line series resistors of 56

Ω

COMPLIES WITH BELLCORE STANDARDS :

2

GND

3

GND

1

TIP

4

RING

TM: ASD is trademarks of STMicroelectronics.