Overview
The SN65HVD1785DG4, produced by Texas Instruments, is a 70-V 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, and is suitable for half-duplex (two-wire bus) communication. It is characterized for operation over a wide temperature range of –40°C to 105°C, making it ideal for various industrial and automotive applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOIC (D), 8 pins |
| Operating Temperature Range (°C) | -40 to 105 |
| Bus-Pin Fault Protection | ±70 V |
| Common-Mode Voltage Range | -20 V to 25 V |
| ESD Protection | ±16 kV JEDEC HBM |
| Quiescent Current (ICC) | 5 mA during operation, 1 µA typical in standby |
| Number of Nodes Supported | Up to 256 nodes |
Key Features
- Bus-Pin Fault Protection up to ±70 V
- Wide Common-Mode Voltage Range (-20 V to 25 V)
- Bus I/O Protection and ±16 kV JEDEC HBM ESD Protection
- Reduced Unit Load for up to 256 nodes
- Failsafe Receiver for open-circuit, short-circuit, and idle-bus conditions
- Low Power Consumption with low standby supply current (1 µA typical)
- Power-Up, Power-Down Glitch-Free Operation
Applications
The SN65HVD1785DG4 is suitable for a variety of applications, including industrial automation, automotive systems, and any environment where robust and reliable RS-485 communication is required. Its wide common-mode voltage range and high fault protection make it ideal for multipoint applications over long cable runs.
Q & A
- What is the operating temperature range of the SN65HVD1785DG4?
The operating temperature range is -40°C to 105°C.
- What type of communication does the SN65HVD1785DG4 support?
The device supports half-duplex (two-wire bus) communication.
- What is the bus-pin fault protection voltage of the SN65HVD1785DG4?
The bus-pin fault protection is up to ±70 V.
- How many nodes can the SN65HVD1785DG4 support?
The device can support up to 256 nodes.
- What is the typical standby supply current of the SN65HVD1785DG4?
The typical standby supply current is 1 µA.
- Does the SN65HVD1785DG4 have ESD protection?
Yes, it has ±16 kV JEDEC HBM ESD protection.
- What is the common-mode voltage range of the SN65HVD1785DG4?
The common-mode voltage range is -20 V to 25 V.
- Is the SN65HVD1785DG4 suitable for multipoint applications?
Yes, it is suitable for multipoint applications over long cable runs.
- Does the SN65HVD1785DG4 have failsafe receiver functionality?
Yes, it has failsafe receiver functionality for open-circuit, short-circuit, and idle-bus conditions.
- Is the SN65HVD1785DG4 power-up and power-down glitch-free?
Yes, the device operates glitch-free during power-up and power-down.
