RS-485 transmittere opererer med høj hastighed og lavt effektforbrug
Exar præsenterer en serie af højhastigheds RS-485/RS-422 transmittere, der kombinerer lav effektforbrug, høj ydelse, kompakt pakning samt +/-15kV ESD beskyttelse (in english).
Exar Corporation has announced a family of high-speed RS-485/RS-422 transmitters that combine low power, high performance, small packaging and high +/- 15kV ESD protection. This family is best suited for industrial applications such as multi-drop clock distribution, telecom networking, robotic control, process automation and local area network applications.The XR33193, XR33194 and XR33195 operate from a 3.3V supply and draw only 180uA (375uA maximum) of supply current. All transmitters feature a shutdown mode that consumes less than 2uA whenever the transmitters are disabled. The family is available in tiny 6-pin TSOT23 packages, ideal for high-speed point-to-point RS-485 applications where space is a concern.
The XR33193/94/95 occupy a 3mm x 3mm footprint and feature 250kbps, 2.5Mbps and 20Mbps data rates. The XR33193 and XR33194 have slew-limited outputs for reduced EMI and error-free communication over long or improperly terminated data cables and multi-drop applications with unterminated stubs. The XR33195 features fast 25ns propagation delay and 5ns driver-output skew.
All three RS-485 transmitters feature +/- 15kV ESD protection on the driver outputs and operate over an extended temperature range of -40°C to +125°C. They also offer hot-swap glitch protection allowing live insertion without driving invalid data onto shared busses.
- These stand-alone drivers complement our recently announced family of RS-485 receivers the XR33180/81/83/84. This tiny driver/receiver chipset is a simple solution for point-to-point RS-485 serial communication, says Dale Wedel, VP of high performance analog at Exar.
