SN74LVC1G66DCKR

SN74LVC1G66DCKR is a Texas Instruments single bilateral analog switch in an SC70-5 package — the SN74LVC1G66 1:1 SPST switch in the 2.0 × 2.1 mm single-gate footprint, for 1.65 V to 5.5 V supplies, with roughly 5.5 Ω typical on-resistance at 4.5 V, 300 MHz bandwidth and 13 pF typical on-capacitance over −40 to +85 °C. Selection advice: electrically this is the same switch as the SN74LVC1G66DBVR in SOT-23-5, which is also listed on this site — the DCKR code buys the smaller SC70 footprint for dense or handheld layouts at the cost of a finer-pitch assembly process, so confirm your assembler's SC70 capability before committing the BOM to it. TI lists this code as Active (Production). Parameters verified against Texas Instruments documentation.