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ST485B

STMicroelectronics
Part Number ST485B
Manufacturer STMicroelectronics
Description Low power RS-485/RS-422 transceiver
Published Jun 17, 2016
Detailed Description ST485B ST485C Low power RS-485/RS-422 transceiver Features ■ Low quiescent current: 300 µA ■ Designed for RS-485 inter...
Datasheet PDF File ST485B PDF File

ST485B
ST485B

Overview
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).
DIP-8 SO-8 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).
Table 1.
Device summary Order code Temperature range ST485CN 0 to 70 °C ST485BN - 40 to 85 °C ST485CDR ST485BDR 0 to 70 °C - 40 to 85 °C Package DIP-8 DIP-8 SO-8 (tape and reel) SO-8 (tape and reel) Packaging 50 parts per tube / 40 tube per box 50 parts per tube / 40 tube per box 2500 parts per reel 2500 parts per reel February 2009 Rev 16 1/19 www.
st.
com 19 Contents Contents ST485B - ST485C 1 Pin configuration .
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3 1.
1 Pin description .
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3 2 Truth tables .
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4 3 Maximum ratings .
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