This post explains for the Analog Switch.
The Part Number is DG302.
The function of this semiconductor is CMOS Analog Switch.
The DG302 is TTL Compatible CMOS Analog Switch.
Maxim’s DG300-DG303 and DG300A-DG303A CMOS dual and quad analog switches combine low power operation with fast switching times and superior DC and AC switch chracteristics. On resistance is less than 50Ω and is essentially constant over the analog signal range. Device specifications are ideal for battery powered circuitry.
1. Monolithic Low Power CMOS
2. Latch-Up proof construction
3. Fully compatible 2nd source
4. Fast switching time
1. Portable Instruments
2. Low power sample/holds
3. Power supply switching
4. Process control and telemetry
Other data sheets are available within the file:
DG302CJ, DG302CWE, DG302CK, DG302BWE, DG302BK, DG302AK
DG302 IGBT Reference Page : http://www.datasheetcafe.com/300v-igbt/