Overview
The SN65HVD1781A-Q1 is a half-duplex RS-485 transceiver designed by Texas Instruments. This device is optimized for robust performance in harsh environments, particularly in automotive applications. It is AEC-Q100 qualified, ensuring it meets stringent automotive standards. The transceiver operates from a single power supply in the range of 3.3 V to 5 V and is capable of signaling rates up to 1 Mbps. It features bus-pin fault protection up to ±70 V and high levels of ESD protection, including ±16-kV Human Body Model (HBM) protection. The device is also characterized by its low power consumption, with a standby current of less than 1 µA when both the driver and receiver are disabled.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 3.15 to 5.5 | V |
| Bus Pin Voltage Range | –70 to 70 | V |
| Operating Temperature Range | –40 to 125 | °C |
| Signaling Rate | Up to 1 Mbps | |
| ESD Protection (HBM) | ±16 kV | |
| Quiescent Supply Current | 4 mA (max) | mA |
| Standby Supply Current | 1 µA (max) | µA |
| Differential Load Resistance | 54 to 60 Ω | Ω |
| Differential Load Capacitance | 50 pF | pF |
Key Features
- Qualified for automotive applications with AEC-Q100 certification.
- Bus-pin fault protection up to ±70 V.
- High ESD protection: ±16-kV HBM and CDM ESD classification level C3B.
- Functional Safety-Capable with documentation available for system design.
- Operation with 3.3-V to 5-V supply range.
- Failsafe receiver for open-circuit, short-circuit, and idle-bus conditions.
- Low power consumption with low standby supply current.
- Pin-compatible with industry-standard SN75176.
- Wide common-mode voltage range suitable for multipoint applications over long cable runs.
- Hot-plugging capability with power-up and power-down glitch-free operation.
Applications
- Infotainment systems.
- Clusters and instrument panels.
- HMI (Human-Machine Interface) and displays.
- Media interfaces.
- Head units in automotive systems.
Q & A
- What is the operating temperature range of the SN65HVD1781A-Q1?
The operating temperature range is from –40°C to 125°C.
- What is the maximum signaling rate of the SN65HVD1781A-Q1?
The maximum signaling rate is up to 1 Mbps.
- What level of ESD protection does the SN65HVD1781A-Q1 offer?
The device offers ±16-kV Human Body Model (HBM) ESD protection.
- Is the SN65HVD1781A-Q1 suitable for automotive applications?
- What is the standby supply current of the SN65HVD1781A-Q1?
The standby supply current is less than 1 µA.
- Can the SN65HVD1781A-Q1 operate in hot-pluggable applications?
- What is the fault protection level of the bus pins?
The bus pins are protected up to ±70 V.
- Is the SN65HVD1781A-Q1 pin-compatible with other industry-standard transceivers?
- What is the common-mode voltage range of the SN65HVD1781A-Q1?
The device features a wide common-mode voltage range, making it suitable for multipoint applications over long cable runs.
- How many receivers can be connected to the bus using the SN65HVD1781A-Q1?
