Update: 29 September, 2023
The MAX253 is a monolithic oscillator/power-driver specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The device drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W. The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches. The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.
File format: PDF
Size: -
MD5 Checksum: 7C56EA588CFCB4AC509E6F985A26007A
Publication date: 11 April, 2012
Downloads: -
PDF Link: MAXIM MAX253 handbook PDF