Maxim Integrated (MAX253CPA+) Ballast Control, RS232 / RS485

Product OverviewThe MAX253CPA+ is a simple power-supply Transformer Driver for isolatedRS-485/RS-232 data-interface applications. The device drives a centre-tappedtransformer primary from a 5 or 3.3VDC power supply. The secondary can be woundto provide any isolated voltage needed at power levels up to 1W. The MAX253consists of a CMOS oscillator driving a pair of N-channel power switches. Theoscillator runs at double the output frequency, driving a toggle flip-flop toensure 50% duty cycle to each of the switches. Internal delays are arranged toensure break-before-make action between the two switches. The SD pin puts theentire device into a low-power shutdown state, disabling both the power switchesand oscillator.0.4µA Low-current shutdown modeApplicationsPower Management, Communications & Networking, Medical, Automation & ProcessControlProduct InformationDevice Type: Ballast ControlIC Interface Type: RS232, RS485No. of Drivers: 2DriversSupply Voltage Min: 4.5VSupply Voltage Max: 5.5VDriver Case Style: DIPNo. of Pins: 8PinsOperating Temperature Min: 0°COperating Temperature Max: 70°CProduct Range: -Automotive Qualification Standard: -MSL: -