MAX485: Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers FEATURES
The MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are lowpower transceivers for RS-485 and RS- 422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.
These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487 have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.
Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.
The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained using the MAX488–MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex applications.
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Vishay / Vitramon
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 0603 3.6pF 200V C0G .1pF HI FREQ
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 2000V 560pF 0.01
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 3000V 620pF 5% AEC-Q200
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Murata Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 2220 X7R 1000volts 0.068uF +/-10%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 630V 0.12uF X7R 1825 10% AEC-Q200
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 16V 1500pF X8R 0805 5% AEC-Q200
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Vishay / Vitramon
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 1206 0.015uF 100volts Y5V +80-20%
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Kyocera AVX
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 100V 4700pF X7R 1210 5% Tol
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 2000V 2700pF 20% AEC-Q200
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 5.1pF X8R 0805 0.25pF AEC-Q200
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 100V 0.47uF X7R 1206 10%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 630volts 0.15uF X7R 10%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 630Vo 5.6nF X8G 1210 10% AEC-Q200
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 10V 1.1pF 0603 X8R 0.25pF
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 200V .033uF X7R 1206 20%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 50V 1pF X8R 1210 0.25pF AEC-Q200
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 1000V 5.1nF X8G 1210 5%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 25V 1200pF X8R 0805 10% AEC-Q200
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Vishay / Vitramon
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 1206 1500pF 50volts X7R 5%
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KEMET Electronics
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Multilayer Ceramic Capacitors MLCC - SMD/SMT 200V 820pF 0.05
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