Littelfuse B61089QDR & B9110DF Dual-Port SLIC Protectors

Littelfuse B61089QDR Dual-Port Subscriber Line Interface Circuit (SLIC) protectors protect two different SLIC tip/ring pairs with independent voltage tracking for each pair. Littelfuse B61089QDR protects the SLIC interface against lightning-induced surge and power fault events. This SLIC protector contains fast switching crowbarring structures for negative events and a simple fast switching diode structure for positive events. B9110DF dual-port polarity programmable SLIC protector protects smart ringing SLICs with dual power supplies. B9110DF protects the SLIC interface against lightning-induced surges and power fault events. This SLIC protector contains fast switching crowbarring structures that are compatible with the Basic levels outlined in ITU K.20, K.21, K.45.

Features

Common features
- Low gate current triggering
- Fails short circuit when surged in excess of its ratings
- Surge capability does not degrade after multiple surge events within its ratings
- ESD Immunity (HBM): JESD22 Class 3B, ≥8KV
- MSL: Level 1, unlimited
- Lead-free and RoHS compliant
B61089QDR
- Dual-port negative voltage tracking programmable component
- Supports battery voltages down to -170V
- 150ma min. holding current
- Specified 2/10 limiting voltage
- Integrated diodes for positive surge protection

B9110DF
- High-performance protection for SLICs with ±V_BAT references and with changing V_BAT references
- -110V to +110V programming range
- Tracking crowbarring component

Applications

Common applications
- Wireless In the Local Loop (WLL)
- Voice applications requiring regenerated Plained Old Telephone Service (POTS)
- VoIP applications
- Private Branch Exchange (PBX)

Additional B61089QDR applications
- Foreign Exchange Station (FXS) applications
- Digital Pair Gain Systems (DPG) and Digital Loop Carrier Systems (DLC)
- Small Office Home Office (SOHO)