MAX1486:Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,12Mbps, RS-485/RS-422 Transceivers in µMAX Package

The MAX1481/MAX1484/MAX1485/MAX1486 provide software-selectable, half-/full-duplex, low-power, slew-rate- limited, and high-speed (12Mbps) RS-485/RS-422 operation in a 10-pin µMAX® package—the smallest 10-pin package available. The software-selectable, half-/full-duplex MAX1485/MAX1486 make obsolete the normally larger and more expensive solutions required for selectable half-/full-duplex RS-485/RS-422 operation: 1) a 14-pin, full-duplex transceiver configured via jumpers between receiver and transmitter lines, or 2) two 8-pin, half-duplex transceivers, which require an additional inverter logic gate for software selectability. The MAX1481/MAX1484 are functionally equivalent to the industry-standard MAX491 and 75180, and are designed for space-constrained, full-duplex RS-422 applications. All parts contain one driver and one receiver and feature a 1/8-unit-load receiver input impedance, allowing up to 256 transceivers on the bus. The MAX1481/MAX1485 feature reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. The MAX1484/MAX1486 driver slew rates are not limited, allowing them to transmit up to 12Mbps. The MAX1481/MAX1484/MAX1485/MAX1486 draw only 300µA of supply current. The MAX1481 has a low-power shutdown mode that reduces supply current to only 0.1µA. All devices operate from a single 5V supply. Drivers are output 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.

Key Features
  • 10-Pin µMAX Package: Smallest 10-Pin Package
  • Software-Selectable Half-/Full-Duplex Operation (MAX1485/MAX1486)
  • 0.1µA Low-Current Shutdown Mode (MAX1481)
  • Slew-Rate Limiting Allows Error-Free Data Transmission (MAX1481/MAX1485)
  • 12Mbps High-Speed Operation (MAX1484/MAX1486)
  • Allow up to 256 Transceivers on the Bus
MAX1481, MAX1484: Pin Configuration
MAX1481, MAX1484: Pin Configuration
Applications/Uses
  • Battery-Powered Applications
  • Handheld Equipment
  • Industrial Control Local Area Networks
  • Level Translators
  • Low-Power RS-422/RS-485 Communications
  • Transceivers for EMI-Sensitive Applications
DataSheet
titleDownload file
MAX1481-MAX1486 Data SheetMAX1481-MAX1486.pdf
Parametrics
Part NumberTx/RxDuplexVSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX14811Tx + 1RxFull50.3250YesYes0.1256NoneNo-40 to +85µMAX/10$1.52 @1k
MAX1484Full12000Yes-µMAX/10
MAX1485Half/Full250No-µMAX/10
MAX1486Half/Full12000No-µMAX/10
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1486CUBNo Longer AvailableMAX1486CUB+µMAX,;10 pin;15.4 mm²0°C to +70°CNo
MAX1486CUB+ActiveµMAX,;10 pin;15.4 mm²0°C to +70°CLead Free
MAX1486CUB+TActiveµMAX,;10 pin;15.4 mm²0°C to +70°CLead Free
MAX1486CUB-TNo Longer AvailableMAX1486CUB+TµMAX,;10 pin;15.4 mm²0°C to +70°CNo
MAX1486EUBNo Longer AvailableMAX1486EUB+µMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1486EUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1486EUB+TActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1486EUB-TNo Longer AvailableMAX1486EUB+TµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1481-MAX1486.pdf MAX1486
Explanation of Maxim RS-485 Features MAX489
MAX1486.pdf MAX1486
MAX1481-MAX1486.pdf MAX1486