MAX253 Datasheet PDF | Maxim Integrated

Maxim Integrated MAX253

The MAX253 is a monolithic oscillator/power-driver, specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. It 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.

Part No.	MAX253
Datasheet	MAX253 Download
Manufacturer	Maxim Integrated
Description	Transformer Driver
Buy	Stock & Price

DESCRIPTION

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-beforemake 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. ____________________________Features o Power-Supply Transformer Driver for Isolated RS-485/RS-232 Data-Interface

APPLICATIONS

o Single +5V or +3.3V Supply o Low-Current Shutdown Mode: 0.4µA o Pin-Selectable Frequency: 350kHz or 200kHz o 8-Pin DIP, SO, and µMAX Packages MAX253 ______________Ordering Information PART MAX253CPA MAX253CSA MAX253CUA MAX253C/D MAX253EPA MAX253ESA MAX253EUA MAX253MJA TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO 8 µMAX Dice* 8...