PBL38614-1 Datasheet | Ericsson

Preliminary Information February 2000 PBL 386 14/1 Subscriber Line Interface Circuit Description The PBL 386 14/1 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in ISDN Network Terminal Adapters and other short loop telemunication equipment which often are remote powered, and by that, the available power is limited. The PBL 386 14/1 has been optimized for low total line interface cost, low power and requires a minimum of external ponents. The PBL 386 14/1 has constant current feed, programmable to max 30m A. The SLIC uses a first battery voltage for On-hook . A second battery voltage is used for Off-hook and must be connected, to reduce short loop power dissipation. The SLIC automatically switches between the two battery supply voltages without need for external ponents or external control. The loop current controls the switching between On-hook and Off-hook battery. The SLIC incorporates loop current, ground key and ring trip detection functions. The PBL 386 14/1 is patible with loop start signalling. Two- to four-wire and four- to two-wire voice frequency (vf) signal conversion is acplished by the SLIC in conjunction with either a conventional CODEC/filter or with a programmable CODEC/filter, e.g. SLAC, Si Co Fi, bo II. The programmable line terminating impedance could be plex or real to fit every market. Longitudinal voltages are suppressed by a feedback loop in the SLIC and the longitudinal balance specifications meet Bellcore TR909 requirements. The PBL 386 14/1 package is a very PCB space efficient 28-pin SSOP. Applications - ISDN Network terminals - Shortloop applications Key Features - Small footprint with SSOP package - On-hook and Off-hook battery with automatic switching, controlled by loop current - On-hook battery current is limited to 6 m A - 37 m W on-hook power dissipation in active state - Metering 0.5 Vrms (0.7 Vpeak) - Adaptive Overhead Voltage The overhead voltage follows 1Vpeak<signals<2...