Overview
The SN65HVD1780DR is a 70-V fault-protected RS-485 transceiver manufactured by Texas Instruments. This device is designed to survive overvoltage faults, including direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. It combines a differential driver and a differential receiver, operating from a single power supply, making it suitable for multipoint applications over long cable runs. The SN65HVD1780DR is fully compliant with ANSI TIA/EIA 485-A and can operate with both 3.3-V and 5-V supply voltages, making it versatile for various low-power and standard applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 105 | °C |
| Supply Voltage Range | 3.15 to 5.5 | V |
| Bus-Pin Fault Protection | ±70 | V |
| ESD Protection on Bus Pins | ±16 kV HBM | - |
| Signaling Rates | 115 kbps, 1 Mbps, up to 10 Mbps | - |
| Standby Supply Current | 1 µA Maximum | - |
| Quiescent Current During Operation | 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 with low standby supply current (1 µA maximum) and quiescent current (4 mA during operation)
- Pin-compatible with industry-standard SN75176 transceiver
- Signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps
Applications
The SN65HVD1780DR is designed for use in RS-485 and RS-422 networks. It is suitable for multipoint applications over long cable runs due to its wide common-mode voltage range. Typical applications include industrial automation, building automation, and any system requiring robust and reliable serial communication over long distances.
Q & A
- What is the operating temperature range of the SN65HVD1780DR?
The operating temperature range is -40°C to 105°C.
- What is the supply voltage range for the SN65HVD1780DR?
The supply voltage range is 3.15 V to 5.5 V.
- What level of bus-pin fault protection does the SN65HVD1780DR offer?
The SN65HVD1780DR offers bus-pin fault protection up to ±70 V.
- What is the ESD protection level on the bus pins of the SN65HVD1780DR?
The ESD protection level is ±16 kV HBM.
- How many nodes can the SN65HVD1780DR support?
The device can support up to 320 nodes.
- What are the signaling rates supported by the SN65HVD1780DR?
The signaling rates supported are 115 kbps, 1 Mbps, and up to 10 Mbps.
- Is the SN65HVD1780DR 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 SN65HVD1780DR?
The standby supply current is 1 µA maximum.
- What is the quiescent current during operation for the SN65HVD1780DR?
The quiescent current during operation is 4 mA.
- What types of networks is the SN65HVD1780DR designed for?
The device is designed for use in RS-485 and RS-422 networks.
