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MAX487EEPA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX487EEPA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 16 page _______________General Description The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electro- static discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E 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 MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw as little as 120µA supply current when unloaded or when fully loaded with disabled drivers (see Selection Table). Additionally, the MAX481E, MAX483E, and MAX487E have a low-current shutdown mode in which they consume only 0.5µA. 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 their outputs into a high-impedance state. The receiver input has a fail-safe feature that guaran- tees a logic-high output if the input is open circuit. The MAX487E and MAX1487E feature quarter-unit-load receiver input impedance, allowing up to 128 transceivers on the bus. The MAX488E–MAX491E are designed for full- duplex communications, while the MAX481E, MAX483E, MAX485E, MAX487E, and MAX1487E are designed for half- duplex applications. For applications that are not ESD sen- sitive see the pin- and function-compatible MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487. ________________________Applications Low-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks ____________________________Features o ESD Protection: ±15kV—Human Body Model o Slew-Rate Limited for Error-Free Data Transmission (MAX483E/487E/488E/489E) o Low Quiescent Current: 120µA (MAX483E/487E/488E/489E) 230µA (MAX1487E) 300µA (MAX481E/485E/490E/491E) o -7V to +12V Common-Mode Input Voltage Range o Three-State Outputs o 30ns Propagation Delays, 5ns Skew (MAX481E/485E/490E/491E/1487E) o Full-Duplex and Half-Duplex Versions Available o Allows up to 128 Transceivers on the Bus (MAX487E/MAX1487E) o Current Limiting and Thermal Shutdown for Driver Overload Protection ±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers ________________________________________________________________ Maxim Integrated Products 1 MAX481E MAX483E MAX485E MAX487E MAX488E MAX489E MAX490E MAX491E MAX1487E PART NUMBER HALF/FULL DUPLEX DATA RATE (Mbps) SLEW-RATE LIMITED LOW-POWER SHUTDOWN RECEIVER/ DRIVER ENABLE QUIESCENT CURRENT ( µA) NUMBER OF TRANSMITTERS ON BUS PIN COUNT Half Half Half Half Full Full Full Full Half 2.5 0.25 2.5 0.25 0.25 0.25 2.5 2.5 2.5 No Yes No Yes Yes Yes No No No Yes Yes No Yes No No No No No Yes Yes Yes Yes No Yes No Yes Yes 300 120 300 120 120 120 300 300 230 32 32 32 128 32 32 32 32 128 8 8 8 8 8 14 8 14 8 ______________________________________________________________Selection Table 19-0410; Rev 3; 7/96 ______________Ordering Information Ordering Information continued on last page. 8 SO 0°C to +70°C MAX481ECSA 8 Plastic DIP 0°C to +70°C MAX481ECPA PIN-PACKAGE TEMP. RANGE PART 8 SO -40°C to +85°C MAX481EESA 8 Plastic DIP -40°C to +85°C MAX481EEPA For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 |
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