MAX13485E:Half-Duplex RS-485/RS-422 Transceivers in µDFN

Industry's Smallest RS-485 Transceiver with Enhanced ESD Protection

The MAX13485E/MAX13486E +5V, half-duplex, ±15kV ESD-protected RS-485 transceivers feature one driver and one receiver. These devices include fail-safe circuitry, guaranteeing a logic-high receiver output when receiver inputs are open or shorted. The receiver outputs a logic-high if all transmitters on a terminated bus are disabled (high impedance). The MAX13485E/MAX13486E include a hot-swap capability to eliminate false transitions on the bus during power-up or live-insertion. The MAX13485E features reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free transmission up to 500kbps. The MAX13486E driver slew rate is not limited, allowing transmit speeds up to 16Mbps. The MAX13485E/MAX13486E feature a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. These devices are intended for half-duplex communications. All driver outputs are protected to ±15kV ESD using the Human Body Model. The MAX13485E/MAX13486E are available in 8-pin SO and space-saving 8-pin µDFN packages. The devices operate over the extended -40°C to +85°C temperature range.

Key Features
  • +5V Operation
  • True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compatibility
  • Hot-Swappable for Telecom Applications
  • Enhanced Slew-Rate Limiting Facilitates Error-Free Data Transmission (MAX13485E)
  • High-Speed Version (MAX13486E) Allows for Transmission Speeds Up to 16Mbps
  • Extended ESD Protection for RS-485/RS-422 I/O Pins ±15kV Using Human Body Model
  • 1/4 Unit Load, Allowing Up to 128 Transceivers on the Bus
  • Available in Space-Saving 8-Pin μDFN or Industry Standard 8-Pin SO Packages
MAX13485E, MAX13486E: Pin Configurations
MAX13485E, MAX13486E: Pin Configurations
Applications/Uses
  • Automated HVAC Systems
  • Industrial Controls
  • Industrial Motor Drives
  • Utility Meters
DataSheet
titleDownload file
MAX13485E-MAX13486E Data SheetMAX13485E-MAX13486E.pdf
Parametrics
Part NumberTx/RxDuplexVSUPPLY
(V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX13485E1Tx + 1RxHalf54.550015YesYes10128Open or ShortedYes-40 to +85µDFN/8
SOIC(N)/8
$1.69 @1k
MAX13486E16000NoµDFN/8
SOIC(N)/8
$1.43 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX13485EELA+ActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX13485EELA+TActiveµDFN,;8 pin;4.2 mm²-40°C to +85°CLead Free
MAX13485EESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX13485EESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX13485E-MAX13486E.pdf MAX13486E
MAX13485E-MAX13486E_cn.pdf MAX13486E
MAX13485E.pdf MAX13485E
MAX13485E-MAX13486E_cn.pdf MAX13485E