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High Output Full-Duplex RS-485 Drivers and Receivers (Rev. C)
Texas Instruments

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 TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11 and ISO 8482:1993 standard-compliant devices.The SN65HVD50, SN65HVD51, SN65HVD52, SN65HVD56 and SN65HVD57 are fully enabled with no external enabling pins. The SN65HVD53, SN65HVD54, SN65HVD55, SN65HVD58, and SN65HVD59 have active-high driver enables and active-low receiver enables. A low, less than 1 ?A, standby current is achieved by disabling both the driver and receiver. All devices are characterized for operation from -40C to 85C. 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. The SN65HVD56 and SN65HVD58 implement receiver equalization technology for improved jitter performance on differential bus applications with data rates up to 20 Mbps at cable lengths up to 160 meters. The SN65HVD57 and SN65HVD59 implement receiver equalization technology for improved jitter performance on differential bus applications with data rates in the range of 1 to 5 Mbps at cable lengths up to 1000 meters.
1/8 Unit-Load Option Available (Up to 256 Nodes on the Bus)Bus-Pin ESD Protection Exceeds 15 kV HBMOptional Driver Output Transition Times for Signaling(1) Rates of 1 Mbps, 5 Mbps and 25 MbpsLow-Current Standby Mode < 1 ?AGlitch-Free Power-Up and Power-Down Bus I/OsBus Idle, Open, and Short Circuit Failsafe Meets or Exceeds the Requirements of ANSI TIA/EIA-485-A and RS-422 Compatible3.3-V Devices Available, SN65HVD30-39APPLICATIONSUtility MetersChassis-to-Chassis InterconnectsDTE/DCE InterfacesIndustrial, Process, and Building AutomationPoint-of-Sale (POS) Terminals and Networks (1) The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).

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