Quad SPDT switch with 1 Ohm Ron — what it means for signal routing
The MAX4784ETE+T from Maxim Integrated is a four-circuit, single-pole double-throw (SPDT) analog switch in a 16-TQFN (3x3 mm) package. Each switch presents a maximum on-resistance of 1 Ohm, which keeps insertion loss low in audio, video, and precision analog paths. The -3 dB bandwidth of 123 MHz supports high-speed switching without rolling off the signal, while the -95 dB crosstalk at 1 MHz ensures that adjacent channels do not bleed into one another — a spec that matters when multiplexing sensitive ADC inputs or low-level transducer signals. Supply voltage spans 1.6 V to 4.2 V. Charge injection is 5 pC typical. Off-leakage stays under 1 nA. Operating temperature covers -40°C to +85°C. The supplier device package is 16-TQFN (3x3 mm).
Switching speed and channel matching
Turn-on time is 25 ns max, turn-off 10 ns max. That asymmetry means the switch breaks before it makes, which prevents momentary shorting of signal paths during channel change. Channel-to-channel on-resistance matching is 100 mOhm max, so gain errors across a multi-channel system stay within a tight band — useful for matched attenuator networks or multiplexed sensor arrays.
Lifecycle and compliance
The MAX4784ETE+T carries an Active lifecycle status and is ROHS3 compliant.