L3121B Datasheet | STMicroelectronics

® PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION Application Specific Discretes A.S.D.TM Features BIDIRECTIONAL FUNCTION WITH VOLTAGE PROGRAMMABILITY IN BOTH POSITIVE AND NEGATIVE POLARITIES. PROGRAMMABLE BREAKDOWN VOLTAGE UP TO 100 V. HOLDING CURRENT = 150 mA min. HIGH SURGE CURRENT CAPABILITY. IPP = 100A , 10/1000 µs SIP4 DESCRIPTION This device has been especially designed to protect a subscriber line interface circuit (SLIC) with an integrated ring generator. Used with the remended application circuit, each line (TIP and RING) is protected against positive and negative surges. In the positive polarity, the breakdown voltage is referenced to the + VB , and...