You are buying  1 piece of Maxim Integrated MAX4656ESA High Current 10ohm SPST 300mA CMOS Analog Switches in 8-pin SOIC package

Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX4655-MAX4658.pdf

Features:
High Continuous Current Handling
300mA (MAX4655/MAX4656)
150mA (MAX4657/MAX4658)
High Peak Current Handling
400mA (MAX4655/MAX4656)
300mA (MAX4657/MAX4658)
10Ω (max) On-Resistance (±15V supplies)
VL Not Required
1Ω (max) RON Flatness over Specified Signal Range
Rail-to-Rail Signal Handling
+12V Single Supply or ±15V Dual SupplyOperation
Pin Compatible with DG417, DG418