MAX3490:3.3V Powered, 10Mbps and Slew-Rate Limited, True RS-485/RS-422 Transceivers

The MAX3483, MAX3485, MAX3486, MAX3488, MAX3490, and MAX3491 are 3.3V, low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The MAX3483 and MAX3488 feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The partially slew-rate-limited MAX3486 transmits up to 2.5Mbps. The MAX3485, MAX3490, and MAX3491 transmit at up to 10Mbps. 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 both inputs are open circuit. The MAX3488, MAX3490, and MAX3491 feature full-duplex communication, while the MAX3483, MAX3485, and MAX3486 are designed for half-duplex communication.

Key Features
  • Operate from a Single 3.3V Supply-No Charge Pump!
  • Interoperable with +5V Logic
  • 8ns Max Skew (MAX3485/MAX3490/MAX3491)
  • Slew-Rate Limited for Errorless Data Transmission (MAX3483/MAX3488)
  • 2nA Low-Current Shutdown Mode (MAX3483/MAX3485/MAX3486/MAX3491)
  • -7V to +12V Common-Mode Input Voltage Range
  • Allows up to 32 Transceivers on the Bus
  • Full-Duplex and Half-Duplex Versions Available
  • Industry Standard 75176 Pinout (MAX3483/MAX3485/MAX3486)
  • Current-Limiting and Thermal Shutdown for Driver Overload Protection
MAX3483, MAX3485, MAX3486: Typical Application Circuit
MAX3483, MAX3485, MAX3486: Typical Application Circuit
Applications/Uses
  • Industrial Control Local Area Networks
  • Integrated Services Digital Networks
  • Low-Power RS-485/RS-422 Transceivers
  • Packet Switching
  • Telecommunications
  • Transceivers for EMI-Sensitive Applications
DataSheet
titleDownload file
MAX3483-MAX3491 Data SheetMAX3483-MAX3491.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
MAX34831Tx + 1RxHalf3.31250YesYes0.00232OpenNo-40 to +85
0 to +70
PDIP(N)/8
SOIC(N)/8
$1.97 @1k
MAX3485Half10000YesYes0.002PDIP(N)/8
SOIC(N)/8
MAX3486Half2500YesYes0.002PDIP(N)/8
SOIC(N)/8
MAX3488Full250NoNo-PDIP(N)/8
SOIC(N)/8
MAX3490Full10000NoNo-PDIP(N)/8
SOIC(N)/8
MAX3491Full10000YesYes0.002PDIP(N)/14
SOIC(N)/14
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3490C/DActiveDICE SALES,;NA pin;DICE S;0°C to +70°CSee data sheet
MAX3490CPANo Longer AvailableMAX3490CPA+PDIP(N),;8 pin;81.9 mm²0°C to +70°CNo
MAX3490CPA+ActivePDIP(N),;8 pin;81.9 mm²0°C to +70°CLead Free
MAX3490CSANo Longer AvailableMAX3490CSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
MAX3490CSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX3490CSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
MAX3490CSA-TNo Longer AvailableMAX3490CSA+TN.SO;8 pin0°C to +70°CSee data sheet
MAX3490EPANo Longer AvailableMAX3490EPA+PDIP(N),;8 pin;81.9 mm²-40°C to +85°CNo
MAX3490EPA+ActivePDIP(N),;8 pin;81.9 mm²-40°C to +85°CLead Free
MAX3490ESANo Longer AvailableMAX3490ESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX3490ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX3490ESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX3490ESA-TNo Longer AvailableMAX3490ESA+TSOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX3483-MAX3491.pdf MAX3491
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface MAX5492
Oops...Practical ESD Protection vs. Foolhardy Placebos MAX13362
ESD Protection for I/O Ports MAX491E
Maxim Leads the Way in ESD Protection MAX491E
MAX3490.pdf MAX3490
MAX3483-MAX3491.pdf MAX3491