L3234 datasheet(4/26 Pages) STMICROELECTRONICS

部件名	L3234

功能描述	HIGHLY INTEGRATED SLIC KIT TARGETED TO PABX AND KEY SYSTEM APPLICATIONS

PDF	26 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

4 / 26 page

DESCRIPTION

The L3234 is a monolithic integrated circuit which

is part of a kit of solid state devices for the sub-

scriber line interface. The L3234 sends a ringing

signal into a two wires analog telephone line in

balanced mode. The AC ringing signal amplitude

is up to 60Vrms, and for that purpose a positive

supply voltage of +100V shall be available on the

subscriber card.

The L3234 receives a low amplitude ringing sig-

nal (950mVrms) and provide the voltage/current

amplification (60Vrms/70mA) when the enable in-

put is active (CS > 2V). In disable mode (CS <

0.8V) the power consumption of the chip is very

low (<14mW).

The circuit is designed with a high voltage bipolar

technology (VCEO > 140V / VCBO > 250V).

The package is a moulded plastic power package

(Heptawatt) suitable also for surface mounting.

HEPTAWATT

BLOCK DIAGRAM

L3234

Solid State Ringing Injector

L3234 - L3235

4/26

L3234 数据表(PDF) 4 Page - STMicroelectronics