Overview
The SN65HVD1782D, produced by Texas Instruments, is a fault-protected RS-485 transceiver designed for robust and reliable communication in harsh environments. This device combines a differential driver and a differential receiver, operating from a single power supply, making it suitable for half-duplex (two-wire bus) communication. It is engineered to survive overvoltage faults, mis-wiring faults, connector failures, cable crushes, and tool mis-applications, as well as robust protection against ESD events up to ±16 kV human-body-model specification.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range | 3.3-V to 5-V | - |
| Bus-Pin Fault Protection | ±30 V | - |
| ESD Protection | ±16 kV HBM | - |
| Signaling Rates | 115 kbps, 1 Mbps, up to 10 Mbps | - |
| Quiescent Current During Operation | 4 mA | - |
| Standby Supply Current | 1 µA Maximum | - |
| Bus Loading Capability | Up to 64 nodes (1/2 unit load) | - |
Key Features
- Bus-Pin Fault Protection up to ±30 V
- Operation with 3.3-V to 5-V supply range
- ±16 kV HBM protection on bus pins
- Reduced unit load for up to 64 nodes
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions
- Low power consumption with low standby supply current (1 µA maximum)
- Quiescent current during operation of 4 mA
- Pin-compatible with industry-standard SN75176 transceiver
- Signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps
- Hot-plugging capability with power-up and power-down glitch-free operation
Applications
The SN65HVD1782D is commonly used in asynchronous data transmission applications, particularly in environments requiring robust fault protection and high reliability. These include:
- Multipoint applications over long cable runs
- Industrial automation and control systems
- Remote sensors and actuators
- Building automation systems
- Hot-swappable or hot-pluggable applications
Q & A
- What is the operating temperature range of the SN65HVD1782D?
The operating temperature range is from -40°C to 125°C.
- What is the supply voltage range for the SN65HVD1782D?
The supply voltage range is from 3.3 V to 5 V.
- How much bus-pin fault protection does the SN65HVD1782D offer?
The device offers bus-pin fault protection up to ±30 V.
- What is the ESD protection level of the SN65HVD1782D?
The device has ±16 kV HBM protection on bus pins.
- How many nodes can be supported on a common bus with the SN65HVD1782D?
Up to 64 nodes can be supported (1/2 unit load).
- What are the signaling rates supported by the SN65HVD1782D?
The device supports signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps.
- Is the SN65HVD1782D compatible with other industry-standard transceivers?
Yes, it is pin-compatible with the industry-standard SN75176 transceiver.
- What is the quiescent current during operation of the SN65HVD1782D?
The quiescent current during operation is 4 mA.
- Does the SN65HVD1782D support hot-plugging applications?
Yes, it is designed for hot-plugging or hot-swappable applications with power-up and power-down glitch-free operation.
- How does the receiver failsafe feature work in the SN65HVD1782D?
The receiver failsafe feature ensures that the receiver output remains logic high under bus-idle, bus-short, or open bus conditions, providing a failsafe logic High state.
