This is information on a product in full production.

October 2014

Doc ID025775 Rev 3

1/10

LCP22

Protection IC for ringing SLICs

Datasheet

Features

• Protection IC recommended for ringing SLICs

• Wide firing voltage range: -120 V to +120 V

Applications

• Dual battery supply voltage SLICs

• Central office (CO)

• Private branch exchange (PBX)

• Digital loop carrier (DLC)

• Digital subscriber line access multiplexer

(DSLAM)

• Fiber in the loop (FITL)

• Wireless local loop (WLL)

• Hybrid fiber coax (HFC)

• ISDN terminal adapter

• Cable modem

TM: Trisil is a trademark of STMicroelectronics

Description

The LCP22 has been developed to protect SLICs

operating on both negative and positive battery

supplies, as well as high voltage SLICs. It

provides crowbar mode protection for both TIP

and RING lines. The surge suppression is

assumed for each wire by two thyristor structures,

one dedicated to positive surges the second one

for negative surges. Both positive and negative

threshold levels are programmable by two gates.

LCP22 can be used to help equipment to meet

various standards such as UL1950, IEC 60950 /

CSAC22.2, UL1459 and TIA-968-A. LCP22

pinout and clearance is compatible with UL60950.

A Trisil

The LCP22 associated with Epcos PTC model

B59173C1130A151 is compliant with

ITU TK20/K21 (4 kV lightning and AC power fault

tests).

Figure 1. Functional diagram

Figure 2. Pin-out configuration

Gn

Line (TIP or RING)

Gp

GND

Line (RING or TIP)

GND

Line (TIP or RING)

Line (RING or TIP)

NC

NC

GND

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