Product Summary

The MAX253CSA is a monolithic oscillator/power-driver. The device is specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. The MAX253CSAe 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 applications of the MAX253CSA include Isolated RS-485/RS-232 Power-Supply, Transformer Driver, High Noise-Immunity Communications Interface, Isolated and/or High-Voltage Power Supplies, Bridge Ground Differentials, Medical Equipment and Process Control.

Parametrics

MAX253CSA absolute maximum ratings: (1)Supply Voltage (VCC): -0.3V to +7V; (2)Control Input Voltages (SD, FS): -0.3V to (VCC + 0.3V); (3)Output Switch Voltage (D1, D2): 12V; (4)Peak Output Switch Current (D1, D2): 1A; (5)Average Output Switch Current (D1, D2): 200mA; (6)Continuous Power Dissipation: 727mW; (7)Operating Temperature Ranges: 0℃ to +70℃; (8)Junction Temperatures: +150℃; (9)Storage Temperature Range: -65℃ to +160℃; (10)Lead Temperature (soldering, 10s): +300℃; (11)Soldering Temperature (reflow): +260℃; (12)PDIP, SO, μMAX, CERDIP containing lead(Pb): +240℃.

Features

MAX253CSA features: (1)Power-Supply Transformer Driver for Isolated RS-485/RS-232 Data-Interface Applications; (2)Single 5V or 3.3V Supply; (3)Low-Current Shutdown Mode: 0.4μA; (4)Pin-Selectable Frequency: 350kHz or 200kHz; (5)8-Pin DIP, SO, and μMAX? Packages.

Diagrams

MAX253CSA block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
MAX253CSA
MAX253CSA

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable 
MAX253CSA+
MAX253CSA+

Maxim Integrated Products

Power Driver ICs Transformer Driver for Iso RS-485 Int

Data Sheet

0-1: $1.95
1-25: $1.31
25-50: $0.95
50-100: $0.94
MAX253CSA+T
MAX253CSA+T

Maxim Integrated Products

Power Driver ICs Transformer Driver for Iso RS-485 Int

Data Sheet

0-2080: $0.84
2080-2500: $0.84
MAX253CSA-T
MAX253CSA-T

Maxim Integrated Products

Power Driver ICs

Data Sheet

Negotiable