| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Frequency | 350 kHz |
| Number of Pins | 8 Pin |
| Supply Voltage (DC) | -300 mV (min) |
| Case/Package | SOIC-8 |
| Number of Outputs | 2 Output |
| Output Voltage | 12.0 V |
| Output Current | 1 A |
| Supply Current | 450 µA |
| Number of Positions | 8 Position |
| Power Dissipation | 471 mW |
| Operating Temperature (Max) | 70 ℃ |
| Operating Temperature (Min) | 0 ℃ |
| Supply Voltage | 3.3V, 5V |
| Supply Voltage (Max) | 7 V |
| Supply Voltage (Min) | 2.5 V |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Unknown |
| Packaging | Tube |
| Operating Temperature | 0℃ ~ 70℃ |
The MAX253CSA+ is a simple power-supply Transformer Driver for isolated RS-485/RS-232 data-interface applications. The device drives a centre-tapped transformer primary from a 5 or 3.3VDC 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.
● 0.4µA Low-current shutdown mode
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