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ST485BN Datasheet(PDF) 1 Page - STMicroelectronics |
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ST485BN Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 19 page February 2008 Rev 15 1/19 19 ST485B ST485C Low power RS-485/RS-422 transceiver Features ■ Low quiescent current: 300 µA ■ Designed for RS-485 interface application ■ -7 V to 12 V common mode input voltage range ■ Driver maintains high impedance in 3-state or with the power OFF ■ 70 mV typical input hysteresis ■ 30 ns propagation delay, 5 ns skew ■ Operate from a single 5 V supply ■ Current limiting and thermal shutdown for driver overload protection ■ Allows up to 64 transceivers on the bus Description The ST485 is al low power transceiver for RS-485 and RS-422 communication. Each part contains one driver and one receiver. This transceiver draw 300 µA (typ.) of supply current when unloaded or fully loaded with disabled drivers. It operates from a single 5 V supply. Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that placed the driver outputs into a high-impedance state. The ST485 is designed for bi-directional data communications on multipoint bus transmission line (half-duplex applications). The ST485 is available in three temperature range: commercial (0 °C to 70 °C), industrial (-40 °C to 85 °C) and automotive (-55 °C to 125 °C). DIP-8 SO-8 Table 1. Device summary Order code Temperature range Package Packaging ST485CN 0 to 70 °C DIP-8 50 parts per tube / 40 tube per box ST485BN -40 to 85 °C DIP-8 50 parts per tube / 40 tube per box ST485CDR 0 to 70 °C SO-8 (tape and reel) 2500 parts per reel ST485BDR -40 to 85 °C SO-8 (tape and reel) 2500 parts per reel www.st.com |
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