The RM12F4990CT is a 12-bit, 16-channel, 8-pole universal linear CMOS analog multiplexer (MUX) manufactured by Cal-Chip. It has an operating voltage range of 2.7V to 5.5V, low power consumption of only 18mW, and a bandwidth of 350kHz max. The MUX operates on two differential analog inputs with a switch on/off ratio of 80dB min. Its maximum on-state resistance is only 10ohms, making it well suited for low power applications. The MUX has a 0.2 ms switching speed, making it fast enough for most applications. Additionally, it has a temperature range of -40 to +85°C, making it suitable for use in most environments.