Overview
The SN65HVD1781D, produced by Texas Instruments, is a fault-protected RS-485 transceiver designed for robust and reliable data transmission in various industrial and automotive applications. This device combines a differential driver and a differential receiver, operating from a single power supply, and is fully compliant with ANSI TIA/EIA 485-A standards. It supports a wide supply voltage range of 3.3V to 5V, making it versatile for different power requirements. The SN65HVD1781D is characterized by its ability to survive overvoltage faults, mis-wiring faults, and ESD events, ensuring high reliability in harsh environments.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | SOIC (D) | 8 pins |
| Operating Temperature Range | °C | -40 to 125 |
| Supply Voltage Range | V | 3.15 to 5.5 |
| Signaling Rate | kbps | Up to 1 Mbps |
| Number of Nodes | Up to 320 | |
| Bus-Pin Fault Protection | V | ±70 V |
| ESD Protection | kV | ±16 kV HBM |
| Standby Supply Current | µA | < 1 µA |
| Quiescent Current During Operation | mA | 4 mA |
Key Features
- Bus-Pin Fault Protection up to ±70 V
- Operation with 3.3-V to 5-V supply range
- ±16-kV HBM Protection on bus pins
- Reduced unit load for up to 320 nodes
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions
- Low power consumption and low standby supply current
- Pin-compatible with industry-standard SN75176 transceiver
- Signaling rates of up to 1 Mbps
Applications
The SN65HVD1781D is suitable for a variety of applications, including:
- Industrial automation and control systems
- Automotive systems requiring robust communication
- Multipoint applications over long cable runs
- Systems requiring high ESD protection and fault tolerance
Q & A
- What is the operating temperature range of the SN65HVD1781D?
The operating temperature range is from -40°C to 125°C.
- What is the supply voltage range for the SN65HVD1781D?
The supply voltage range is from 3.15V to 5.5V.
- What is the maximum signaling rate of the SN65HVD1781D?
The maximum signaling rate is up to 1 Mbps.
- How many nodes can the SN65HVD1781D support?
It can support up to 320 nodes.
- What level of bus-pin fault protection does the SN65HVD1781D offer?
The device offers bus-pin fault protection up to ±70 V.
- What is the ESD protection level of the SN65HVD1781D?
The device has ±16-kV HBM protection on bus pins.
- Is the SN65HVD1781D pin-compatible with other industry-standard transceivers?
Yes, it is pin-compatible with the industry-standard SN75176 transceiver.
- What is the standby supply current of the SN65HVD1781D?
The standby supply current is less than 1 µA.
- What is the quiescent current during operation of the SN65HVD1781D?
The quiescent current during operation is 4 mA.
- In what types of applications is the SN65HVD1781D commonly used?
It is commonly used in industrial automation, automotive systems, and multipoint applications over long cable runs.
