Dual SP4T analog switch for precision signal routing
The MAX4618EUE+ from Analog Devices (formerly Maxim Integrated) is a dual single-pole, four-throw (SP4T) analog switch in a 16-pin TSSOP package. It routes one of four inputs to a common output per channel, with two independent switches on the die. The part is specified for single-supply operation from 2V to 5.5V, making it a fit for 3.3V and 5V logic systems in industrial control, data acquisition, and audio signal routing where board space is tight and signal integrity matters.
What the key ratings mean for your design
On-resistance of 10 Ohm max and channel-to-channel matching of 200 mOhm ensure gain error between multiplexed channels stays tight for precision ADC front-ends. Crosstalk of -96 dB at 100 kHz means a signal on one channel will not bleed into the adjacent channel at audible or low-frequency data rates. That spec holds for the 100 kHz band; at higher frequencies the isolation degrades, so keep this part below 1 MHz for clean switching. Switching times of 15 ns (ton) and 10 ns (toff) and 3 pC charge injection are specified. Leakage current of 1 nA max off-state keeps offset errors negligible in high-impedance sensor interfaces. Combined with 5 pF / 15 pF channel capacitance, the RC time constant stays low enough for signals up to a few megahertz without significant attenuation.
Package, mounting, and environment
The 16-TSSOP body (4.40 mm width) is a fine-pitch surface-mount package. Solder profile follows standard JEDEC MSL-1 for lead-free reflow. The -40°C to +85°C operating range covers most indoor industrial and telecom enclosures; not rated for under-hood automotive or extended industrial above 85°C.
Lifecycle and compliance
ROHS3 compliant and lead-free. No direct replacement is listed by the manufacturer.