Product Summary

The MAX253CPA+ 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. The MAX253CPA+ consists of a CMOS oscillator driving a pair of N-channel power switches. The applications of the MAX253CPA+ 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, Process Control.

Parametrics

MAX253CPA+ 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 (TA = +70℃), Plastic DIP (derate 9.09mW/℃ above +70℃): 727mW; SO (derate 5.88mW/℃ above +70℃): 471mW; μMAX (derate 4.10mW/℃ above +70℃): 330mW; CERDIP (derate 8.00mW/℃ above +70℃): 640mW.

Features

MAX253CPA+ 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

MAX253CPA+ block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MAX253CPA+
MAX253CPA+
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
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MAX201CPD
MAX201CPD
Maxim Integrated Products
RS-232 Interface IC
Data Sheet
Negotiable 
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MAX2022ETX+TD
Maxim Integrated Products
Modulator / Demodulator 1.5-2.5GHz Quadratr Modulator
Data Sheet
0-2028: $7.21
2028-2500: $7.21
MAX2022ETX+
MAX2022ETX+
Maxim Integrated Products
Modulator / Demodulator 1.5GHz-2.5GHz Quad Mod/Demod
Data Sheet
0-1: $7.83
1-25: $5.26
25-50: $3.81
50-100: $3.76
MAX2022ETX+D
MAX2022ETX+D
Maxim Integrated Products
Modulator / Demodulator 1.5-2.5GHz Quadratr Modulator
Data Sheet
0-1: $17.41
1-25: $11.60
25-50: $8.41
50-100: $7.73
MAX2021ETX+T
MAX2021ETX+T
Maxim Integrated Products
Modulator / Demodulator 0.75GHz-1.2GHz Quad Mod/Demod
Data Sheet
0-1949: $3.43
1949-2500: $3.43
MAX2022ETX
MAX2022ETX
Maxim Integrated Products
Modulator / Demodulator 1.5GHz-2.5GHz Quad Mod/Demod
Data Sheet
0-801: $3.28
801-1000: $3.16