8:1 analog mux with 100 ohm on-resistance
The MAX4051AESE+T from Analog Devices (formerly Maxim Integrated) is a single 8:1 analog multiplexer/demultiplexer in a 16-SOIC package. It switches one of eight inputs to a common output, or the reverse as a demultiplexer. The headline spec is a maximum on-state resistance of 100 ohms, with channel-to-channel matching held to 6 ohms max, keeping the insertion loss uniform across channels. Off-leakage is just 100 pA max, and channel capacitance is 2 pF on both the source and drain sides, so it loads the signal path lightly. Crosstalk is rated at -90 dB at 100 kHz, which is clean enough for audio-path multiplexing or moderate-frequency analog signals. Charge injection is 2 pC — a figure that matters when the mux drives a sample-and-hold or an integrator, because that glitch can shift the settled voltage. The supply range is flexible: single supply from 2 V to 16 V, or dual supplies from ±2.7 V to 8 V. Switching times are 175 ns on, 150 ns off, fast enough for most data-acquisition scan rates. The -40°C to +85°C temperature grade covers industrial control, instrumentation, and telecom line cards. It is not rated for automotive under-hood environments, but is fine for indoor and outdoor cabinet gear. The 16-SOIC body is 3.90 mm wide — a standard footprint that reworks cleanly with hot air; the pin 1 indicator is the usual notch and dot, so orientation is clear under magnification.
Lifecycle and sourcing
The MAX4051AESE+T is listed as Active on the manufacturer's product status, and it is ROHS3 compliant. For a BOM line that needs an 8:1 analog mux in a 16-SOIC, this is a stable, low-risk selection with no near-term EOL concern.