SP491CS

The SP491 transceiver has an additional feature compared to the SP490. The SP491 includes driver and receiver tri-state enable lines, while the SP490 does not have this feature. This means that the SP491 allows for the enabling or tri-stating of the driver outputs, providing more control over the transmission process.

The key features of the SP490/SP491 Full Duplex RS-485 Transceivers include: - They are full-duplex differential transceivers meeting the requirements of RS-485 and RS-422 standards . - Fabricated with a Sipex proprietary BiCMOS process, they require less power compared to older bipolar designs . - Ideal for multi-drop applications or long-distance interfaces, allowing up to 32 drivers and 32 receivers to be connected to a data bus . - Equipped with a wide common mode range (-7V to +12V) to accommodate ground potential differences for cabling up to 4,000 feet . - RS-485 is a differential interface, making data virtually immune to noise in the transmission line . - The drivers for both SP490 and SP491 have differential outputs . - The SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422 standards up to 5Mbps . - The SP491 is identical to the SP490 with the addition of driver and receiver tri-state enable lines . - Both products feature ±200mV receiver input sensitivity over a wide common mode range . - Available in various package options for different temperature ranges, such as 0 ˚C to +70 ˚C and -40 ˚C to +85 ˚C

The available package options for the SP490 and SP491 transceivers are as follows: - SP490CN and SP490CN/TR: 8-Pin NSOIC package, operating temperature range of 0 ˚C to +70 ˚C . - SP490CS: 8-Pin PDIP package, operating temperature range of 0 ˚C to +70 ˚C . - SP490EN: 8-Pin NSOIC package, operating temperature range of -40 ˚C to +85 ˚C . Therefore, the available package options for the SP490 and SP491 transceivers include 8-Pin NSOIC and 8-Pin PDIP packages with different operating temperature ranges. .