PBL38640/2R3

The PBL38640/2R3 is a kind of SLIC (Subscriber Line Interface Circuit). It is a 90 V bipolar integrated circuit for digital loop carrier, FITL and other telecommunications equipment. PBL38640/2R3 is ideal for low total line interface cost and a high degree of flexibility in different applications. The device includes loop current, ground key and ring trip detection functions. Besides, it can be available in 24-pin SSOP package, 24-pin SOIC and 28-pin PLCC.

There are some features ofPBL38640/2R3 as follows: (1)24-pin SSOP package; (2)high and low battery with automatic switching; (3)65 mW on-hook power dissipation in active state; (4)on-hook transmission; (5)long loop battery feed tracks Vbat for maximum line voltage; (6)only +5 V feed in addition to battery; (7)selectable transmit gain (1x or 0.5x); (8)no power-up sequence; (9)programmable signal headroom; (10)43 V open loop voltage @ -48V battery feed; (11)constant loop voltage for line leakage <5 mA (RLeak ~ >10 k@ -48 V); (12)full longitudinal current capability during on-hook state; (13)analog over temperature protection permits transmission while the protection circuit is active.

The following is about the maximum ratings of PBL38640/2R3: (1)storage temperature range, TStg: -55 +150 ; (2)operating temperature range, TAmb: -40 +110 ; (3)operating junction temperature range, TJ: -40 +140 ; (4)VCC with respect to A/BGND, VCC: -0.4 to 6.5 V; (5)VBat2 with respect to A/BGND, VBat2: VBat to 0.4 V; (6)VBat with respect to A/BGND, continuous, VBat: -75 to 0.4 V; (7)VBat with respect to A/BGND, 10 ms, VBat:  -80 to 0.4 V; (8)continuous power dissipation at TAmb +85 , PD: 1.5 W.