The 4MX0121V is a 12-bit bus switch/multiplexer (MUX) designed for 2.5V supply voltage operation. The MUX is designed for operation in DDR3 and DDR4 memory bus systems. The 4MX0121V has a 1:2 switch or 2:1 multiplex topology with a 12-bit wide bus. The 4MX0121V uses a high-speed switch architecture providing high bandwidth, low insertion loss, return loss, and very low propagation delay, allowing for the use in many applications requiring switching or multiplexing of high-speed signals.