SN65HVD50D ACTIVE

Features for the SN65HVD50

• 1/8 Unit-Load Option Available (Up to 256 Nodes on the Bus)
• Bus-Pin ESD Protection Exceeds 15 kV HBM
• Optional Driver Output Transition Times for Signaling Rates⁽¹⁾ of 1 Mbps, 5 Mbps and 25 Mbps
• Low-Current Standby Mode < 1 µA
• Glitch-Free Power-Up and Power-Down Bus I/Os
• Bus Idle, Open, and Short Circuit Failsafe
• Designed for RS-422 and RS485 Networks
• 3.3-V Devices Available, SN65HVD30-35
• APPLICATIONS
  • Utility Meters
  • Chassis-to-Chassis Interconnects
  • DTE/DCE Interfaces
  • Industrial, Process, and Building Automation
  • Point-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).

Description for the SN65HVD50

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, 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.