The Calogic SD310 is a 30V analog switch driver without a built-in protection diode from gate to substrate for use with SD312 and SD314 DMOS analog switches. The SD312 is a high performance, high-speed, high-voltage, and low resistance analog switch capable of switching 5V signals. The maximum threshold of 2V permits simple direct TTL an CMOS driving for small applications. The SD314 is DMOS analog switch capable of switching 10V analog signals with all other parameters identical to those of SD312.