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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 Applications/Uses Automated HVAC Systems Industrial Controls Industrial Motor Drives Utility Meters

DataSheet

Parametrics

Design kits & evaluation modules

• MAX13485EEVKIT

Quality and Environmental Data

• MAX13485E.pdf

Ordering Information