PBL38650/2R3

Product Summary

The PBL38650/2R3 is a Subscriber Line Interface Circuit (SLIC) for use in Central Office Metering applications and other telecommunications equipment. The PBL38650/2R3 has been optimized for low total line interface cost and a high degree of flexibility in different applications. A second, lower battery voltage may be connected to the device to reduce short loop power dissipation. The SLIC automatically switches between the two battery supply voltages without need for external components or external control. The SLIC incorporates loop current, ground key and ring trip detection functions. The PBL38650/2R3 is compatible with both loop and ground start signaling.

Parametrics

PBL38650/2R3 absolute maximum ratings: (1)Storage temperature range TStg: -55 +150 ℃; (2)Operating temperature range TAmb: -40 +110 ℃; (3)Operating junction temperature range, Note 1 TJ: -40 to +140 ℃; (4)VCC with respect to A/BGND VCC: -0.4 to 6.5 V; (5)VBat2 with respect to A/BGND VBat2 VBat: 0.4 V; (6)VBat with respect to A/BGND, continuous VBat -75: 0.4 V; (7)VBat with respect to A/BGND, 10 ms VBat -80: 0.4 V; (8)Continuous power dissipation at TAmb ≤ +70 ℃ PD: 1.5 W; (9)Input voltage VID: -0.4 to VCC V; (10)Output voltage VOD: -0.4 to VCC V.

Features

PBL38650/2R3 features: (1)24-pin SSOP package; (2)Programmable two-wire signal headroom for 2.2 Vrms metering; (3)High and low battery with automatic switching; (4)Only +5 V feed in addition to battery; (5)Selectable transmit gain (0.5x or 0.25x); (6)70 mW on-hook power dissipation in active state; (7)On-hook transmission; (8)Long loop battery feed tracks Vbat for maximum line voltage; (9)No power-up sequence; (10)43V open loop voltage ＠ -48V battery feed; (11)Constant loop voltage for line leakage <5 mA (RLeak ~ >10 kΩ ＠ -48V); (12)Full longitudinal current capability during on-hook state; (13)Analog over temperature protection permits transmission while the protection circuit is active; (14)Line voltage measurement; (15)Polarity reversal; (16)Ground key detector; (17)Tip open state with ring ground detector.

Diagrams