LMS485  Product Folder

The LMS485 is a low power differential bus/line transceiver designed for high speed bidirectional data communication on multipoint bus transmission lines. It is designed for balanced transmission lines. It meets ANSI Standards TIA/EIA RS422-B, TIA/EIA RS485-A and ITU recommendation and V.11 and X.27. The LMS485 combines a TRI-STATE™ differential line driver and differential input receiver, both of which operate from a single 5.0V power supply. The driver and receiver have an active high and active low, respectively, that can be externally connected to function as a direction control. The driver and receiver differential inputs are internally connected to form differential input/output (I/O) bus ports that are designed to offer minimum loading to bus whenever the driver is disabled or when V_CC = 0V. These ports feature wide positive and negative common mode voltage ranges, making the device suitable for multipoint applications in noisy environments. The LMS485 is available in a 8-Pin SOIC and 8-Pin DIP packages. It is a drop-in socket replacement to Maxim's MAX485

• Meet ANSI standard RS-485-A and RS-422-B
• Data rate 2.5 Mbps
• Single supply voltage operation, 5V
• Thermal shutdown protection
• Short circuit protection
• Low power BiCMOS
• Allows up to 32 transceivers on the bus
• Open circuit fail-safe for receiver
• Extended operating temperature range -40°C to 85°C
• Drop-in replacement to MAX485
• Available in 8-pin SOIC and 8-Pin DIP package

• Low power RS-485 systems
• Network hubs, bridges, and routers
• Point of sales equipment (ATM, barcode scanners,...)
• Local area networks (LAN)
• Integrated service digital network (ISDN)
• Industrial programmable logic controllers
• High speed parallel and serial applications
• Multipoint applications with noisy environment