LH1465AB

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device.

These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those indicated in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.

* If the SOG package is used, it is recommended to place a drop of RTV (room temperature vulcanizing) compound on the tip and ring pins (pins 3 and 4). This will guard against the possibility of arcing between the pins (which are 0.030 in. apart) under worst-case dust and oil board buildup conditions.

The LH1465AB ISDN dc Termination IC is used on Uinterface digital subscriber lines (U-DSL) and provides a polarity insensitive dc termination for the loop-sealing current and a recognizable signature for mechanized loop testing (MLT) systems. The LH1465AB passes dc signaling information to the NT1 circuitry through a 6N139 optoisolator (or equivalent). The LH1465AB IC consists of two functional blocks. The first provides the electronic inductor and silicon-controlled rectifier portion of the termination, while the second drives the LED of the 6N139 optoisolator. Inquire about the availability of tape-and-reel packaging for the 16-pin SOG (LH1465AAE).