Maxim’s beyond-the-rail technology looks to simplify power-supply requirements and system design. Designed to be both flexible and robust, the mux and switches are suitable for general-purpose system signal routing and industrial analogue front-ends. Specific applications include POS connector sharing, industrial analogue inputs, handheld instrumentation, ATE, and audio/data switching.
In the past multiple devices were needed to mux/switch interface signals greater than 5V for CAN, RS-485, and RS-232 interfaces, or to switch low-voltage signals less than 5V for USB and audio signals. The ±25V 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 ±25V 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 75MHz (min) bandwidth, they also switch Full Speed USB (12Mbps). The low 1.5 ohm (Max) RON and 0.3 milliohm (typ) RON flatness of the MAX14778 ensure precise voltage measurements over temperature ideal for precision analog input applications and connector sharing applications.
The MAX14778 mux is packaged in a 20-pin TQFN. The MAX14759/MAX14760/MAX14763/MAX14764 switches are available in an 8-pin TDFN, and the MAX14761/MAX14762 in a 10-pin TDFN. All devices are specified over the -40°C to +85°C temperature range.