Description
The MAX3465–MAX3469 are high-speed differential bus transceivers for RS-485 and RS-422 communications. They are designed to meet TIA/EIA-422-B, TIA/EIA-485-A, V.11, and X.27 standards. The transceiver complies with the Profibus specification providing +2.1V minimum output level with a 54. load, 40Mbps data rate, and output skew less than 2ns.
Each part contains one three-state differential line driver and one differential input line receiver. The devices operate from a +5V supply and feature true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This enables all receiver outputs on a terminated bus to output logic highs when all transmitters are disabled.
Features
- Recommended for Profibus Applications
- Up to 40Mbps Data Rate
- 15ns Transmitter Propagation Delay
- 20ns Receiver Propagation Delay
- 2ns Transmitter and Receiver Skew
- High Differential Driver Output Level (2.1V on 54)
- Hot-Swap Versions
- 1iA Shutdown Supply Current
- Low Supply Current Requirements (2.5mA, typ)
- Allow Up to 128 Transceivers on the Bus
- True Fail-Safe Receiver while Maintaining EIA/TIA-485 Compatibility
- Designed for Multipoint Transmissions on Long or Noisy Bus Lines
- Full-Duplex and Half-Duplex Versions Available
- Phase Controls to Correct for Twisted-Pair Reversal for 14-Pin Versions
- Current-Limiting and Thermal Shutdown for Driver Overload Protection
Links
Related articles
- RS 485 & RS 422 - http://www.hw-server.com/docs/rs485.html
- Choosing the Right RS-232 Transceiver - http://www.hw-server.com/beginners/crrs232t.html
- DTMF Basics - http://www.hw-server.com/docs/dtmfb.html
