80V Fault-Protected Full-Duplex RS-485 Transceiver - Maxim Integrated Products
Description
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19-4098; Rev 0; 5/08
±80V Fault-Protected Full-Duplex RS-485 Transceiver
General Description
The MAX13448E full-duplex RS-485 transceiver features inputs and outputs fault protected up to ±80V (with respect to ground).
The device operates from a +3.
0V to +5.
5V supply and features true fail-safe circuitry, guaranteeing a logic-high receiver output when the receiver inputs are open or shorted.
This enables all receiver outputs on a terminated bus to output logichigh when all transmitters are disabled.
The MAX13448E features a slew-rate limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 500kbps with a +5V supply, and 250kbps with a +3.
3V supply.
The MAX13448E includes a hot-swap capability to eliminate false transitions on the bus during power-up or hot insertion.
The driver and receiver feature active-high and active-low enables, respectively, that can be connected together externally to serve as a direction control.
The MAX13448E features an 1/8-unit load receiver input impedance, allowing up to 256 transceivers on the bus.
All driver outputs are protected to ±8kV ESD using the Human Body Model.
The MAX13448E is available in a 14-pin SO package and operates over the extended -40°C to +85°C temperature range.
o True Fail-Safe Receiver o Hot-Swap Input Structure on DE o ESD Protection on the RS-485 I/O Ports ±8kV Human Body Model o Slew-Rate Limiting Facilitates Error-Free Data Transmission o 1/8-Unit Load Allows Up to 256 Transceivers on the Bus o -7V to +12V Common-Mode Input Voltage Range o +3.
0V to +5.
5V Operating Supply Voltage o Available in 14-Pin SO Package
Features
o ±80V Fault Protection on the RS-485 I/O Ports
MAX13448E
Ordering Information
PART MAX13448EESD+ TEMP RANGE -40°C to +85°C PIN-PACKAGE 14 SO
+Denotes a lead-free package.
Applications
Industrial Control Systems HVAC Control systems Utility Meters Motor Driver Control S...
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