Standard-compliant RS-485 transceivers offer reliability in noisy industrial environments
The robust STMicroelectronics ST4E1240 and ST4E1216 transceiver ICs are ideal for factory automation equipment, industrial robots and telecoms infrastructure thanks to the high signal integrity and integrated ESD protection.
The ST4E1240 and ST4E1216 from STMicroelectronics are low-power, differential line transceivers for half-duplex RS-485 transmissions.
With the ST4E1240, STMicroelectronics has extended the capability of its portfolio of RS-485 transceivers to cover data-transfer requirements up to a high maximum speed of 40Mbits/s. A high-speed transceiver is typically used for shorter cable runs in applications calling for high data rates.
The data rate of the ST4E1216 is up to 16Mbits/s. It is better suited to extended cable runs due to its lower speed and higher signal integrity over long distances.
Both transceivers are tolerant of high transient ESD voltages: the bus pins withstand contact discharges of up ±12 kV.
Using the ST4E1240 or ST4E1216, equipment designers can configure a bus network with more than 64 transceivers, and up to 100 nodes. Compatible with PROFIBUS network requirements, the differential output voltage exceeds 2.1V at a 5V supply. The ST4E1240 and ST4E1216 also meet or exceed the requirements of the TIA/EIA-485A standard.
Both transceivers are supplied in a standard SO-8 package with a 4.9mm x 3.9mm footprint, or a DFN8 package measuring 3mm x 3mm. The ST4E1216 operates over a temperature range of -40°C to 125°C. The ST4E1240 has a -40°C to 85°C temperature range in the SO-8 package, and -40°C to 125°C in the DFN8.