This post describes for the semiconductor TDA1028.
The Part Number is TDA1028. The package is 16-lead DIL, plastic ( SOT-38 )
The function of this semiconductor is Signal Souces Switch.
The manufacturer of this part is NXP.
See the preview image and the PDF file for more information.
The TD1028 is a quadruple operational amplifier connencted as an impedance converter. Each amplifier has 2 switchable inputs which are protected by clamping diodes. The input currents are independent of the switch position and the outputs are short-circuit protected. The device is intended as an elecronic four-channel signal-sources switch in a.f. amlifiers.