Overview
The SN65HVD888DR, produced by Texas Instruments, is a low-power RS-485 transceiver designed for robust and reliable data transmission in various industrial and commercial applications. This device features automatic bus-polarity correction and comprehensive transient protection, making it suitable for demanding environments. It operates from a single 5-V power supply and supports data rates from 300 bps to 250 kbps over controlled-impedance transmission media such as twisted-pair cabling.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5 | 5.5 | V |
| VID Differential Input Voltage | -12 | 12 | V | |
| VI Input Voltage at Any Bus Terminal | -7 | 12 | V | |
| VIH High-Level Input Voltage | 2 * VCC | V | ||
| VIL Low-Level Input Voltage | 0 | 0.8 * VCC | V | |
| IO Output Current | -60 | 60 | mA | |
| CL Differential Load Capacitance | 50 | pF | ||
| Data Rate | 300 bps | 250 kbps | ||
| Operating Temperature | -40°C | 125°C | ||
| Package | SOIC-8 |
Key Features
- Automatic bus-polarity correction within 76 ms of bus idling.
- Comprehensive transient protection: ±16 kV HBM, ±12 kV IEC61000-4-2 Contact Discharge, and +4 kV IEC61000-4-4 Fast Transient Burst.
- Low-power standby mode with supply current typically less than 400 nA.
- Wide common-mode voltage range, suitable for multi-point applications over long cable runs.
- Supports up to 256 nodes on a bus due to low bus input currents.
- Half-duplex communication with differential driver and receiver operating from a single 5-V power supply.
Applications
- E-Metering Networks
- Industrial Automation
- HVAC Systems
- DMX512-Networks
- Process Control
- Battery-Powered Applications
- Motion Control
- Telecom Equipment
Q & A
- What is the primary function of the SN65HVD888DR? The SN65HVD888DR is a low-power RS-485 transceiver with automatic bus-polarity correction and transient protection.
- What is the data rate range supported by the SN65HVD888DR? The device supports data rates from 300 bps to 250 kbps.
- What type of protection does the SN65HVD888DR offer? The device offers comprehensive transient protection including ±16 kV HBM, ±12 kV IEC61000-4-2 Contact Discharge, and +4 kV IEC61000-4-4 Fast Transient Burst.
- How does the SN65HVD888DR handle bus polarity correction? The device automatically corrects bus polarity within 76 ms of bus idling.
- What is the operating temperature range of the SN65HVD888DR? The device operates from -40°C to 125°C.
- What is the package type of the SN65HVD888DR? The device is available in an SOIC-8 package.
- How many nodes can share a common RS-485 bus with the SN65HVD888DR? Up to 256 units can share a common RS-485 bus.
- What is the typical supply current in standby mode? The supply current is typically less than 400 nA in standby mode.
- What are some common applications of the SN65HVD888DR? Common applications include E-Metering Networks, Industrial Automation, HVAC Systems, DMX512-Networks, Process Control, Battery-Powered Applications, Motion Control, and Telecom Equipment.
- What is the differential load capacitance limit for the SN65HVD888DR? The differential load capacitance limit is 50 pF.
