Overview
The SN65HVD1780DG4 is a 70-V fault-protected 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, including direct shorts to power supplies, mis-wiring faults, connector failures, cable crushes, and tool mis-applications. The transceiver also offers robust protection against ESD events, adhering to the human-body-model specification.
The SN65HVD1780DG4 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 applications. It is pin-compatible with the industry-standard SN75176 transceiver, allowing for drop-in upgrades in most systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (8 pins) |
| Operating Temperature Range | -40°C to 105°C |
| Supply Voltage | 3.15 V to 5.5 V |
| Duplex | Half-duplex |
| Number of Drivers/Receivers | 1/1 |
| Fault Protection | ±70 V |
| HBM ESD Protection | ±16 kV |
| Quiescent Current (ICC) | 6 mA (max) |
| Signaling Rate (max) | Up to 10 Mbps |
| Common Mode Range | -7 V to 12 V |
| Number of Nodes | Up to 320 nodes |
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 and low standby supply current (1 µA max)
- Pin-compatible with industry-standard SN75176 transceiver
- Signaling rates of 115 kbps, 1 Mbps, and up to 10 Mbps
- Hot-plugging capability with power-up and power-down glitch-free operation
Applications
The SN65HVD1780DG4 is suitable for a variety of applications, including:
- Multipoint applications over long cable runs
- Industrial automation and control systems
- Building automation and control systems
- Point-of-sale terminals and other commercial equipment
- Medical devices requiring robust communication interfaces
- Any system requiring reliable, fault-tolerant RS-485 communication
Q & A
- What is the operating temperature range of the SN65HVD1780DG4?
The operating temperature range is -40°C to 105°C.
- What are the supply voltage options for the SN65HVD1780DG4?
The device can operate with supply voltages ranging from 3.15 V to 5.5 V.
- What is the maximum signaling rate of the SN65HVD1780DG4?
The maximum signaling rate is up to 10 Mbps.
- How many nodes can the SN65HVD1780DG4 support?
The device can support up to 320 nodes.
- What kind of ESD protection does the SN65HVD1780DG4 offer?
The device offers ±16-kV HBM protection on bus pins.
- Is the SN65HVD1780DG4 compatible with other industry-standard transceivers?
Yes, it is pin-compatible with the industry-standard SN75176 transceiver.
- What type of fault protection does the SN65HVD1780DG4 provide?
The device provides bus-pin fault protection up to ±70 V.
- Can the SN65HVD1780DG4 be used in hot-plugging applications?
Yes, it is designed for hot-plugging with power-up and power-down glitch-free operation.
- What is the quiescent current of the SN65HVD1780DG4?
The quiescent current is 6 mA (max).
- What is the common mode range of the SN65HVD1780DG4?
The common mode range is -7 V to 12 V.
