Overview
The SN65HVD1782DRG4 is a fault-protected RS-485 transceiver designed and manufactured 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 designed to survive overvoltage faults, mis-wiring faults, connector failures, cable crushes, and tool mis-applications, making it highly robust for various industrial and automotive applications. The device is fully compliant with ANSI TIA/EIA 485-A standards and can operate with both 3.3-V and 5-V supplies, offering flexibility for low-power applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40°C to 125°C | °C |
| Supply Voltage | 3.3 V to 5 V | V |
| Driver Output Voltage | Up to 5 V (reduced for 3.3 V supply) | V |
| Common-Mode Voltage Range | -7 V to 12 V | V |
| Bus Fault Protection | Up to ±70 V | V |
| ESD Protection | ±16 kV Human Body Model (HBM) | kV |
| Package Type | SOIC (8-pin), PDIP (8-pin) | |
| Package Size (SOIC) | 4.90 mm × 3.91 mm | mm |
| Package Size (PDIP) | 9.81 mm × 6.35 mm | mm |
| Signaling Rate | Up to 1 Mbps | Mbps |
| Receiver Failsafe | High state on invalid bus conditions |
Key Features
- Fault protection up to ±70 V on bus pins, ensuring robustness against overvoltage faults and mis-wiring.
- Internal ESD protection circuits providing ±16 kV human body model (HBM) electrostatic discharge protection.
- Operation from a single power supply with support for both 3.3-V and 5-V supplies.
- Wide common-mode voltage range (-7 V to 12 V) suitable for multipoint applications over long cable runs.
- Receiver failsafe feature that outputs a logic High state in case of open, shorted, or idle bus conditions.
- Pin-compatible with industry-standard SN75176 transceivers, making it a drop-in upgrade in most systems.
- Supports up to 64 devices on a single bus, making it suitable for half-duplex (two-wire bus) communication.
Applications
The SN65HVD1782DRG4 is suitable for a variety of applications, including:
- Industrial automation and control systems.
- Automotive systems requiring robust communication interfaces.
- Long-distance data transmission over twisted-pair cables.
- Multipoint networks where multiple devices need to communicate on the same bus.
- Systems requiring high reliability and fault tolerance in harsh environments.
Q & A
- What is the operating temperature range of the SN65HVD1782DRG4?
The operating temperature range is from -40°C to 125°C. - What are the supported supply voltages for this transceiver?
The device supports both 3.3-V and 5-V supplies. - What is the common-mode voltage range of the SN65HVD1782DRG4?
The common-mode voltage range is -7 V to 12 V. - How much ESD protection does the SN65HVD1782DRG4 offer?
The device offers ±16 kV human body model (HBM) electrostatic discharge protection. - What is the maximum signaling rate supported by this transceiver?
The maximum signaling rate is up to 1 Mbps. - How many devices can share a bus using the SN65HVD1782DRG4?
Up to 64 devices can share a bus. - Is the SN65HVD1782DRG4 pin-compatible with other industry-standard transceivers?
Yes, it is pin-compatible with the industry-standard SN75176 transceivers. - What happens to the receiver output in case of invalid bus conditions?
The receiver outputs a logic High state in case of open, shorted, or idle bus conditions. - What types of faults does the SN65HVD1782DRG4 protect against?
The device protects against overvoltage faults, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. - What are the typical applications for the SN65HVD1782DRG4?
Typical applications include industrial automation, automotive systems, long-distance data transmission, and multipoint networks.
