The MAX3440E-MAX3444E fault-protected RS-485 and J1708 transceivers feature ±60V protection from signal faults on communication bus lines. Each device contains one differential line driver with three-state output and one differential line receiver with three-state input. The 1/4-unit-load receiver input impedance allows up to 128 transceivers on a single bus. The devices operate from a 5V supply at data rates of up to 10Mbps. True fail-safe inputs guarantee a logic-high receiver output when the receiver inputs are open, shorted, or connected to an idle data line. Hot-swap circuitry eliminates false transitions on the data bus during circuit initialization or connection to a live backplane. Short-circuit current-limiting and thermal shutdown circuitry protect the driver against excessive power dissipation, and on-chip ±15kV ESD protection eliminates costly external protection devices. The MAX3440E-MAX3444E are available in 8-pin SO and PDIP packages and are specified over industrial and automotive temperature ranges.
Feature
- ±15kV ESD Protection
- ±60V Fault Protection
- Guaranteed 10Mbps Data Rate (MAX3441E/MAX3443E)
- Hot Swappable for Telecom Applications
- True Fail-Safe Receiver Inputs
- Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX3440E/MAX3442E/MAX3444E)
- Allow Up to 128 Transceivers on the Bus
- -7V to +12V Common-Mode Input Range
- Automotive Temperature Range (-40°C to +125°C)
- Industry-Standard Pinout
Applications
- HVAC Controls
- Industrial Networks
- RS-422/RS-485 Communications
- Telecommunication Systems
