Overview
The SN65HVD50DR is a high-output full-duplex RS-485 driver and receiver produced by Texas Instruments. This device is part of the SN65HVD5X series, designed for balanced transmission lines and compliance with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T v.11, and ISO 8482:1993 standards. It operates with a 5-V power supply and is characterized for operation from –40°C to 85°C, making it suitable for a wide range of industrial and commercial applications. Each driver and receiver has separate input and output pins, enabling full-duplex bus communication designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | –40 to 85 | °C |
| Supply Voltage Range | 4.5 to 5.5 | V |
| Signaling Rates | 1 Mbps, 5 Mbps, 25 Mbps | - |
| Differential Load Resistance | 54 to 60 | Ω |
| High-Level Input Voltage | 2 VCC | V |
| Low-Level Input Voltage | 0 to 0.8 VCC | V |
| Differential Input Voltage | –12 to 12 | V |
| High-Level Output Current (Driver) | –60 | mA |
| Low-Level Output Current (Driver) | 60 | mA |
| Standby Current | < 1 μA | - |
Key Features
- 1/8 Unit-load option available, supporting up to 256 nodes on the bus.
- Bus-pin ESD protection exceeds 15 kV HBM.
- Optional driver output transition times for signaling rates 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).
Q & A
- What is the operating temperature range of the SN65HVD50DR? The operating temperature range is from –40°C to 85°C).
- What are the signaling rates supported by the SN65HVD50DR? The device supports signaling rates of 1 Mbps, 5 Mbps, and 25 Mbps).
- What is the differential load resistance for the SN65HVD50DR? The differential load resistance is between 54 Ω and 60 Ω).
- Does the SN65HVD50DR have ESD protection? Yes, it has bus-pin ESD protection that exceeds 15 kV HBM).
- What is the standby current of the SN65HVD50DR? The standby current is less than 1 μA).
- Is the SN65HVD50DR designed for full-duplex communication? Yes, it is designed for full-duplex bus communication with separate input and output pins).
- What are the typical applications of the SN65HVD50DR? Typical applications include utility meters, chassis-to-chassis interconnects, DTE/DCE interfaces, industrial automation, and point-of-sale terminals).
- Does the SN65HVD50DR support 3.3-V operation? While the SN65HVD50DR itself operates at 5V, there are 3.3-V versions available in the SN65HVD30-35 series).
- What kind of failsafe features does the SN65HVD50DR have? The device has bus idle, open, and short circuit failsafe features).
- Is the SN65HVD50DR glitch-free during power-up and power-down? Yes, it has glitch-free power-up and power-down bus I/Os).
