SP4T switch for RF and precision analog routing
The Maxim Integrated MAX4704EGC+T is a single-pole, four-throw (SP4T) analog switch in a 12-QFN (3x3 mm) package. It routes one common I/O to any of four independent channels, controlled by a 2-bit digital address. The switch handles both analog and digital signals, with a 200 MHz -3dB bandwidth that makes it suitable for video, RF, and high-speed data multiplexing, not just low-frequency audio or control signals. On-resistance is 60 ohms maximum, with channel-to-channel matching of 1 ohm. Supply range spans 1.8 V to 5.5 V single supply. Crosstalk is rated at -90 dB at 1 MHz, a strong figure for keeping signals from bleeding between channels in precision analog or multiplexed sensor applications. Charge injection is 2 pC, low enough that sample-and-hold droop or glitch energy is manageable in most data-acquisition front ends.
What the key ratings mean for the BOM
The 60 ns turn-on and 20 ns turn-off times (max) are fast enough for most multiplexing tasks, including switching between sensor channels in a data-acquisition system running at hundreds of kilohertz. The 7 pF channel capacitance limits off-channel feedthrough at high frequencies; it is typical for a 60-ohm switch in this package size.
Lifecycle and sourcing posture
ROHS3 compliant. No stock or price figures are published here because the market moves daily; a quick RFQ returns the real numbers.