MAX3250 Datasheet PDF

●The MAX3250CAI+ is a ±50V isolated RS-232 Transceiver for programmable logic controller and point-of-sale equipment. The MAX3250 is a 3.0 to 5.5V powered, ±50V isolated EIA/TIA-232 and V.28/V.24 communications interface with high data-rate capabilities. The MAX3250 is a dual die part that operates with up to ±50V difference between the RS-232 side and the logic side (ISOCOM to GND). This makes the device ideal for operation in noisy conditions with high common-mode voltages. This feature prevents damage to the device if RS-232 lines are inadvertently short-circuited to a +24 or ±48V power bus. The MAX3250 is powered by a single 3 to 5.5V supply on the logic side. Power is transferred from the logic side to the isolated side by ±100V external capacitors. The MAX3250 has two receivers (Rx) and two drivers (Tx) and is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.

● Isolation breaks ground loops due to high common-mode voltages while maintaining data rate

● Shutdown allows multiple interfaces (IrDA, RS-232, RS-485) to be connected to the same UART

● Inductorless/transformerless design simplifies EMI compliance

● Meets EIA/TIA-232 specifications down to 3.0V