The MAX845ESA is a transformer driver IC from Analog Devices, designed for isolated DC-to-DC power supplies in space-sensitive applications like PCMCIA cards. It operates from a 5V or 3.3V supply.
The MAX845ESA-T is a transformer driver IC from Analog Devices / Maxim Integrated, designed for space-sensitive applications like PCMCIA cards. It operates from a 2.5V to 6V supply.