MAXIM MAX485CPA+ Logic IC

The MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are low-power transceivers for RS-485 and RS422 communication. Every half accommodates one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 characteristic diminished slew-rate drivers that reduce EMI and cut back reflections attributable to improperly terminated cables, thus permitting error-free knowledge transmission as much as 250kbps. The driving force slew charges of the MAX481, MAX485, MAX490, MAX491, and MAX1487 aren’t restricted, permitting them to transmit as much as 2.5Mbps. These transceivers draw between 120µA and 500µA of provide present when unloaded or totally loaded with disabled drivers. Moreover, the MAX481, MAX483, and MAX487 have a low-current shutdown mode wherein they eat solely 0.1µA. All components function from a single 5V provide. Drivers are short-circuit present restricted and are protected towards extreme energy dissipation by thermal shutdown circuitry that locations the motive force outputs right into a high-impedance state. The receiver enter has a fail-safe characteristic that ensures a logic-high output if the enter is open circuit. The MAX487 and MAX1487 characteristic quarter-unit-load receiver enter impedance, permitting as much as 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained utilizing the MAX488–MAX491, whereas the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex purposes.