Beyond-the-rails mux and switch family simplifies power-supply requirements

March 22, 2012 // By Paul Buckley
Maxim Integrated Products has unveiled the MAX14778 (analog mux) and MAX14759–MAX14764 (analog switches), ±25 V above- and below-the-rails devices that let you switch/mux a wide signal range from standard 3 V to 5.5 V supplies.

Designers no longer need multiple switches/mux to switch both high- and low-voltage signals. Maxim’s beyond-the-rail technology helps simplify power-supply requirements and system design. Flexible and robust, the mux and switches are ideal for general-purpose system signal routing and industrial analog front-ends. Specific applications include POS connector sharing, industrial analog inputs, handheld instrumentation, ATE, and audio/data switching.

In the past multiple devices were needed to mux/switch interface signals greater than 5 V for CAN, RS-485, and RS-232 interfaces, or to switch low-voltage signals less than 5 V for USB and audio signals. The ±25 V MAX14778 mux can multiplex up to 8 channels, making it an excellent choice for applications requiring connector sharing (multiplexing RS-232, USB, RS-485, CAN, or audio).

The ±25 V signal capability of all the devices enables switching of true RS-232 signals for connector sharing applications. For analog input applications, the wide voltage range provides a robust signal range to accommodate harsh industrial environments. With a 75 MHz (min) bandwidth, they also switch Full Speed USB (12 Mbps). The low 1.5 Ω (Max) RON and 3 mΩ (typical) RON flatness of the MAX14778 ensure precise voltage measurements over temperature ideal for precision analog input applications and connector sharing applications.

More information about the switches at

MAX14778
MAX14759, MAX14761, MAX14763
MAX14760, MAX14762, MAX14764