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Part Number
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MAX253 |
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Manufacturer
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Maxim |
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Description
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Transformer Driver |
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Published
|
May 6, 2005 |
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Detailed Description
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19-0226; Rev 0; 1/94
Transformer Driver for Isolated RS-485 Interface
_______________General Description
The MAX253 is ...
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Datasheet
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MAX253
|
Overview
19-0226; Rev 0; 1/94
Transformer Driver for Isolated RS-485 Interface
_______________General Description
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.
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 ac...
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