Overview
The SN65HVD1781P is a robust RS-485 transceiver manufactured by Texas Instruments, designed for reliable communication in harsh industrial environments. This DIP8-packaged IC is part of the SN65HVD178x series, offering enhanced fault protection and extended common-mode voltage range. It is widely used in applications requiring long-distance, noise-immune data transmission, such as industrial automation, building control, and automotive systems. Its compatibility with 3.3V to 5V power supplies and high ESD protection make it a versatile choice for engineers seeking durability and performance.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3.3 to 5 | V | |
| Signaling Rate | 1 | Mbps | |
| Fault Protection | -70 to 70 | V | |
| Common Mode Range | -7 to 12 | V | |
| Number of Nodes | 320 | ||
| ESD Protection | ±16 | kV | HBM |
| Operating Temperature | -40 to 125 | °C | |
| Quiescent Current | 4 | mA | During Operation |
| Standby Current | 1 | μA | Maximum |
| Package | DIP8 |
Key Features
- Enhanced fault protection up to ±70V on bus pins.
- Extended common-mode voltage range for noise immunity.
- High ESD protection (±16kV HBM) for durability.
- Low power consumption with 1μA standby current.
- Compatible with 3.3V to 5V power supplies.
- Supports up to 320 nodes on a single bus.
- Fail-safe receiver for open-circuit, short-circuit, and idle-bus conditions.
Applications
The SN65HVD1781P is ideal for industrial automation, building control systems, and automotive electronics. Its robust design ensures reliable communication in environments with high noise and voltage fluctuations. It is commonly used in motor control, HVAC systems, and remote data acquisition, where long-distance and noise-immune data transmission are critical. Additionally, its low power consumption makes it suitable for battery-powered applications.
Q & A
1. What is the operating voltage range of SN65HVD1781P?
The SN65HVD1781P operates within a voltage range of 3.3V to 5V.
2. What is the maximum signaling rate supported?
It supports a maximum signaling rate of 1 Mbps.
3. How does the fault protection work?
The device provides fault protection up to ±70V on bus pins, safeguarding against overvoltage conditions.
4. What is the ESD protection level?
It offers ±16kV HBM ESD protection on bus pins.
5. What is the common-mode voltage range?
The common-mode voltage range is -7V to 12V.
6. How many nodes can be supported on a single bus?
It supports up to 320 nodes on a single bus.
7. What is the standby current consumption?
The standby current is 1μA (maximum).
8. Is it compatible with 3.3V systems?
Yes, it is compatible with both 3.3V and 5V systems.
9. What are the typical applications?
Typical applications include industrial automation, building control, and automotive systems.
10. What is the operating temperature range?
The operating temperature range is -40°C to 125°C.
