Overview
The SN65HVD1792D, produced by Texas Instruments, is a fault-protected RS-485 transceiver designed to operate in harsh environments. This device combines a differential driver and a differential receiver, both operating from a single power supply. It is characterized for operation over a temperature range of –40°C to 105°C, making it suitable for various industrial, defense, aerospace, and medical applications. The SN65HVD1792D is robust against overvoltage faults, mis-wiring, and ESD events, providing high levels of protection up to ±70 V and ±16 kV ESD protection according to JEDEC standards.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5 | 5.5 | V |
| Bus Pin Voltage Range | –70 | 70 | V | |
| Input Voltage Range at Logic Pins | –0.3 | VCC + 0.3 | V | |
| Differential Input Voltage | –25 | 25 | V | |
| Driver Output Current | –60 | 60 | mA | |
| Receiver Output Current | –8 | 8 | mA | |
| Differential Load Resistance | 54 | 60 | Ω | |
| Differential Load Capacitance | 50 | pF | ||
| Junction Temperature | 170 | °C | ||
| ESD Protection (Human-Body Model) | ±16 kV |
Key Features
- Bus-pin fault protection up to ±70 V
- High ESD protection: ±16 kV JEDEC HBM, ±4 kV JEDEC CDM, and ±400 V JEDEC MM
- Extended common-mode voltage range: –20 V to 25 V
- Low power consumption: 5 mA quiescent current during operation, 0.5 μA typical standby current
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions
- Power-up, power-down glitch-free operation
- Supports up to 256 nodes due to reduced unit load
- Hot-pluggable capability with default disabled input/output pins and receiver failsafe
- Inverting-polarity versions available to correct bus wire reversals without re-wiring
Applications
- RS-485 and RS-422 networks
- Industrial automation and control systems
- Defense and aerospace applications
- Medical devices requiring robust communication interfaces
- J1708 applications with specific configurations available
- Hot-swappable or hot-pluggable systems
Q & A
- What is the operating temperature range of the SN65HVD1792D?
The SN65HVD1792D operates over a temperature range of –40°C to 105°C.
- What is the maximum bus-pin fault protection voltage for the SN65HVD1792D?
The device can survive bus pin faults up to ±70 V.
- What is the ESD protection level of the SN65HVD1792D?
The device offers ±16 kV ESD protection according to JEDEC HBM standards.
- What is the typical quiescent current consumption of the SN65HVD1792D?
The typical quiescent current consumption is 5 mA during operation and 0.5 μA in standby.
- Does the SN65HVD1792D support hot-swappable applications?
Yes, it is designed for hot-swappable or hot-pluggable applications with power-up, power-down glitch-free operation and default disabled input/output pins.
- What is the common-mode voltage range of the SN65HVD1792D?
The common-mode voltage range is –20 V to 25 V.
- How many nodes can the SN65HVD1792D support in an RS-485 network?
The device supports up to 256 nodes due to its reduced unit load.
- Does the SN65HVD1792D have failsafe receiver functionality?
Yes, the receiver has failsafe functionality for open-circuit, short-circuit, and idle-bus conditions.
- Are there inverting-polarity versions of the SN65HVD1792D available?
Yes, inverting-polarity versions are available to correct bus wire reversals without re-wiring.
- What are the typical applications of the SN65HVD1792D?
The device is used in RS-485 and RS-422 networks, industrial automation, defense, aerospace, medical devices, and J1708 applications.
