Overview
The SN65HVD1470DR is a robust differential bus transceiver from Texas Instruments, designed to operate using the RS-485 and RS-422 communication standards. This integrated circuit is part of the SN65HVD1470 series, known for its reliability and efficiency in facilitating long-distance and high-speed data transmission. The device combines a differential driver and a differential receiver, operating from a single 3.3-V power supply, and is suitable for full-duplex bus communication designs. It features high ESD protection, large receiver hysteresis for noise rejection, and a wide operating temperature range from –40°C to 125°C, making it reliable in harsh operating environments.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | Texas Instruments | Mounting Style | SMD/SMT |
| Series | SN65HVD1470 | Function | Transceiver |
| Data Rate | 400 kb/s | Number of Drivers | 1 Driver |
| Number of Receivers | 1 Receiver | Duplex | Full Duplex |
| Supply Voltage - Max | 3.6 V | Supply Voltage - Min | 3 V |
| Operating Supply Current | 1.1 mA | Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C | ESD Protection | ±16 kV IEC61000-4-2 Contact Discharge, > ±30 kV HBM |
| Output Current | 8 mA, 60 mA | Output Type | Differential |
| Pd - Power Dissipation | 285 mW | Propagation Delay Time | 350 ns, 70 ns |
| Protocol Supported | RS-422, RS-485 | Shutdown | No Shutdown |
Key Features
- High ESD protection: ±16 kV IEC61000-4-2 contact discharge and > ±30 kV HBM ESD protection.
- Robust 3.3-V drivers and receivers with large receiver hysteresis (70 mV) for noise rejection.
- Full-duplex operation with separate input and output pins for each driver and receiver.
- Wide common-mode voltage range suitable for multi-point applications over long cable runs.
- Low power consumption: < 1.1 mA quiescent current during operation and low standby supply current (10 nA typical, < 5 µA maximum).
- Glitch-free power-up and power-down protection for hot-plugging applications.
- 5-V tolerant logic inputs compatible with 3.3-V or 5-V controllers.
- Signaling rate options optimized for 400 kbps, 20 Mbps, and 50 Mbps.
- Extended industrial temperature range: –40°C to 125°C.
Applications
The SN65HVD1470DR is particularly well-suited for industrial applications where noise immunity and high data integrity are essential. Common applications include:
- Factory automation systems.
- Building automation systems.
- Process control systems.
- Multipoint transmission lines in industrial networks.
Q & A
- What is the primary function of the SN65HVD1470DR?
The SN65HVD1470DR is a full-duplex transceiver designed for RS-485 and RS-422 communication protocols.
- What is the operating temperature range of the SN65HVD1470DR?
The device operates from –40°C to 125°C.
- What level of ESD protection does the SN65HVD1470DR offer?
The device offers ±16 kV IEC61000-4-2 contact discharge and > ±30 kV HBM ESD protection.
- What is the maximum data rate supported by the SN65HVD1470DR?
The SN65HVD1470DR supports a data rate of up to 400 kbps, though other variants in the series support higher rates.
- What is the power supply voltage range for the SN65HVD1470DR?
The device operates with a supply voltage range of 3 V to 3.6 V.
- Does the SN65HVD1470DR have any special power-saving features?
Yes, it has a low standby supply current of 10 nA typical and < 5 µA maximum when both the driver and receiver are disabled.
- Is the SN65HVD1470DR compatible with both 3.3-V and 5-V controllers?
Yes, the device has 5-V tolerant logic inputs.
- What kind of noise immunity does the SN65HVD1470DR provide?
The device features large receiver hysteresis (70 mV) for noise rejection.
- Can the SN65HVD1470DR be used in hot-plugging applications?
Yes, it has glitch-free power-up and power-down protection for hot-plugging applications.
- What is the typical quiescent current during operation?
The typical quiescent current during operation is less than 1.1 mA.
- What package type is the SN65HVD1470DR available in?
The device is available in a 14-pin SOIC package.
