Overview
The SN65HVD1782DR is a robust RS-485 transceiver designed by Texas Instruments. This device is part of the SN65HVD178x family, which combines a differential driver and a differential receiver operating from a single power supply. It is engineered to survive overvoltage faults, such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The device is also robust to ESD events, complying with the human-body-model specification. It is suitable for half-duplex (two-wire bus) communication and features a wide common-mode voltage range, making it ideal for multipoint applications over long cable runs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (8) | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range | 3.3 to 5 | V |
| Bus-Pin Fault Protection | ±30 V | V |
| ESD Protection on Bus Pins | ±16 kV HBM | - |
| Signaling Rates | Up to 10 Mbps | - |
| Standby Supply Current | 1 µA Maximum | - |
| Quiescent Current During Operation | 4 mA | - |
| Common-Mode Voltage Range | -7 to 12 V | V |
Key Features
- Bus-Pin Fault Protection up to ±30 V
- ±16 kV HBM Protection on Bus Pins
- Operation with 3.3-V to 5-V Supply Range
- 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) and Quiescent Current (4 mA)
- Pin-Compatible with Industry-Standard SN75176 Transceiver
- Signaling Rates of 115 kbps, 1 Mbps, and up to 10 Mbps
Applications
- Industrial Networks and Automation
- Electrical Meters
- Building Automation Systems
- Security Electronics
- Multipoint Applications over Long Cable Runs
Q & A
- What is the operating temperature range of the SN65HVD1782DR?
The operating temperature range is from -40°C to 125°C.
- What are the signaling rates supported by the SN65HVD1782DR?
The device supports signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps.
- How many nodes can share a bus using the SN65HVD1782DR?
Up to 64 nodes can share a bus due to the reduced unit load feature.
- What is the ESD protection level on the bus pins of the SN65HVD1782DR?
The bus pins have ±16 kV HBM protection.
- Is the SN65HVD1782DR compatible with the industry-standard SN75176 transceiver?
Yes, it is pin-compatible with the industry-standard SN75176 transceiver.
- What is the failsafe behavior of the receiver in the SN65HVD1782DR?
The receiver is failsafe to invalid bus states such as open-circuit, short-circuit, and idle-bus conditions, outputting a logic High state in these cases.
- What is the standby supply current of the SN65HVD1782DR?
The standby supply current is 1 µA maximum.
- Can the SN65HVD1782DR operate with a 3.3-V supply?
Yes, it can operate with a 3.3-V supply, although with reduced driver output voltage for low-power applications.
- What types of faults can the SN65HVD1782DR survive?
The device can survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications.
- What is the common-mode voltage range of the SN65HVD1782DR?
The common-mode voltage range is -7 to 12 V.
