The MAX14778 is a dual 4:1 analog multiplexer that supports analog signals up to ±25V with a single 3.0 to 5.5V supply. Each multiplexer has separate control inputs to allow independent switching, making the device ideal for multiplexing different communications signals with the same connector pins.
The MAX14778 dual 4:1 analog multiplexer from Maxim supports analog signals up to ±25 V using a single 3.0 V to 5.5 V supply. Each multiplexer has independent control inputs, a low on‑resistance (1.5 Ω max) and can handle up to 300 mA continuous current.
The device is offered in a 20‑pin TQFN package, operates from –40 °C to +85 °C, and includes extended ESD protection of +6 kV (human‑body model) on the signal pins. It is suitable for USB 1.1, RS‑485, and other communication interfaces.
| Supply Voltage Range | 3.0 V to 5.5 V |
|---|---|
| Continuous Current Through Switch | 300 mA |
| Input Capacitance | 78 pF |
| ESD Protection (A_/B_ pins) | +6 kV HBM |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 20‑pin TQFN (5 mm × 5 mm) |
Each multiplexer can carry up to 300 mA of continuous current in either direction.
The A_ and B_ pins are protected up to +6 kV human‑body model.
It is offered in a 20‑pin TQFN package measuring 5 mm × 5 mm.