This lot of 20 Philips Semiconductor HEF4052BT SO-16 ICs are a dual 4-channel analog multiplexer/demultiplexer. They have a mounting style of surface mount and a package of SOIC-16. The ICs have a maximum operating voltage of 15V and a minimum operating voltage of 3V. The HEF4052BT ICs feature CMOS digital logic and have a temperature range of -40 °C to 125 °C.