Overview
The SN65HVD1781DG4 is a 70-V fault-protected RS-485 transceiver designed and manufactured by Texas Instruments. This device is part of the SN65HVD178x series, which is known for its robustness and reliability in various communication environments. The SN65HVD1781DG4 combines a differential driver and a differential receiver, making it suitable for multipoint applications over long cable runs. It operates from a single power supply and is fully compliant with the ANSI TIA/EIA 485-A standard, supporting both 3.3-V and 5-V supply voltages.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | 8-SOIC |
| Data Rate | Up to 10 Mbps (115 kbps, 1 Mbps, 10 Mbps) |
| Number of Drivers | 1 Driver |
| Number of Receivers | 1 Receiver |
| Supply Voltage - Min | 3.15 V |
| Max Supply Voltage | 5.5 V |
| Minimum Operating Temperature (°C) | -40°C |
| Maximum Operating Temperature (°C) | +125°C |
| Bus-Pin Fault Protection | ±70 V |
| ESD Protection | ±16-kV HBM Protection on Bus Pins |
Key Features
- Bus-Pin Fault Protection: The device can withstand overvoltage faults up to ±70 V, making it robust against direct shorts to power supplies, mis-wiring faults, connector failures, and other overvoltage conditions.
- ESD Protection: Provides high levels of protection against electrostatic discharge (ESD) events, meeting the human-body-model (HBM) specification of ±16 kV.
- Low Power Consumption: Features low standby supply current (1 µA maximum) and quiescent current during operation (ICC4-mA), making it suitable for low-power applications.
- Failsafe Receiver: Ensures reliable operation in open-circuit, short-circuit, and idle-bus conditions.
- Pin Compatibility: Pin-compatible with the industry-standard SN75176 transceiver, allowing for easy drop-in upgrades in most systems.
- Signaling Rates: Supports signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps.
Applications
The SN65HVD1781DG4 is designed for use in various RS-485 communication applications, including:
- Multipoint Networks: Suitable for multipoint applications over long cable runs due to its wide common-mode voltage range and robust fault protection.
- Industrial Automation: Ideal for use in industrial automation systems where reliability and fault tolerance are critical.
- Telecommunications: Can be used in telecommunications equipment requiring robust and reliable serial communication interfaces.
- Automotive Systems: Suitable for automotive systems that require high reliability and fault protection in harsh environments.
Q & A
- What is the maximum data rate supported by the SN65HVD1781DG4?
The SN65HVD1781DG4 supports data rates up to 10 Mbps, including 115 kbps and 1 Mbps.
- What is the bus-pin fault protection voltage for the SN65HVD1781DG4?
The device can withstand bus-pin faults up to ±70 V.
- What is the operating temperature range for the SN65HVD1781DG4?
The operating temperature range is from -40°C to +125°C.
- Is the SN65HVD1781DG4 RoHS compliant?
Yes, the SN65HVD1781DG4 is RoHS compliant.
- What is the package type of the SN65HVD1781DG4?
The package type is 8-SOIC.
- Does the SN65HVD1781DG4 support both 3.3-V and 5-V supply voltages?
Yes, the device is fully compliant with ANSI TIA/EIA 485-A and can operate with both 3.3-V and 5-V supply voltages.
- What is the ESD protection level for the SN65HVD1781DG4?
The device provides ±16-kV HBM protection on bus pins.
- Is the SN65HVD1781DG4 pin-compatible with other industry-standard transceivers?
Yes, it is pin-compatible with the industry-standard SN75176 transceiver.
- What are some common applications for the SN65HVD1781DG4?
Common applications include multipoint networks, industrial automation, telecommunications, and automotive systems.
- What is the failsafe receiver feature in the SN65HVD1781DG4?
The failsafe receiver ensures reliable operation in open-circuit, short-circuit, and idle-bus conditions.
