SN65HVD50

高输出全双工 RS 485 驱动器和接收器

The SN65HVD5X devices are 3-state differential line drivers and differential-input line receivers that operate with a 5-V power supply. Each driver and receiver has separate input and output pins for full-duplex bus communication designs. They are designed for balanced transmission lines and interoperation with ANSI A/EIA-485A, TIA/EIA-422-B, ITU-T v.11 and ISO 8482:1993 standard-compliant devices.

The , SN65HVD51, and SN65HVD52 are fully enabled with no external enabling pins.

The SN65HVD53, SN65HVD54, and SN65HVD55 have active-high driver enables and active-low receiver enables. A low, less than 1 µA, standby current is achieved by disabling both the driver and receiver.

All devices are characterized for operation from –40°C to 85°C.

The high output feature of the SN65HVD5x provides more noise margin than the typical RS-485 drivers. The extra noise margin makes applications in long cable and harsh noise environments possible.

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1/8 Unit-Load Option Available Up to 256 Nodes on the Bus

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Bus-Pin ESD Protection Exceeds 15 kV HBM

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Optional Driver Output Transition Times for Signaling Rates1 of 1 Mbps, 5 Mbps and 25 Mbps

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Low-Current Standby Mode < 1 µA

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Glitch-Free Power-Up and Power-Down Bus I/Os

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Bus Idle, Open, and Short Circuit Failsafe

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Designed for RS-422 and RS485 Networks

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3.3-V Devices Available, SN65HVD30-35

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APPLICATIONS

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Utility Meters

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Chassis-to-Chassis Interconnects

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DTE/DCE Interfaces

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Industrial, Process, and Building Automation

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Point-of-Sale POS Terminals and Networks

1The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps bits per second.