SN65HVD1781D

Drivers, Receivers, Transceivers Overview

The SN65HVD1781D is a half-duplex RS-485 transceiver manufactured by Texas Instruments, housed in an 8-pin SOIC surface-mount package. It operates within a supply voltage range of 3.15 V to 5.5 V and supports data rates up to 1 Mbps. The device features fault protection for common-mode voltages ranging from -7 V to +12 V. It functions reliably across an extended temperature range of -40°C to +125°C. Key electrical parameters include a maximum propagation delay of 80 ns and a shutdown current of less than 5 µA.

Drivers, Receivers, Transceivers Feature Summary

• Integrated fault protection safeguards the receiver against damage from excessive common-mode voltages on the bus lines.
• Low-power shutdown mode significantly reduces quiescent current consumption when the device is not actively transmitting or receiving data.
• High electromagnetic interference (EMI) immunity is achieved through controlled slew rates on the differential driver outputs.

Drivers, Receivers, Transceivers Applications

• Industrial automation systems requiring robust communication over noisy environments
• Building automation networks utilizing RS-485 protocols
• Metering applications such as electricity and gas meters

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'D' confirms the SOIC-8 package variant during procurement. Confirm RoHS compliance status matches current manufacturing standards. Ensure the ordering part number aligns with the required tape-and-reel or tube packaging format specified by the distributor. Cross-reference the manufacturer date code to ensure component freshness.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a standard 1 Mbps RS-485 interface is sufficient for the application's bandwidth requirements. Choose the SN65HVD1781D over higher-speed variants if cost optimization and lower EMI emissions are prioritized. Ensure the system design accommodates the -7 V to +12 V common-mode range rather than the wider ±70 V range found in other series members.

Drivers, Receivers, Transceivers Part Context

This device belongs to the SN65HVD178x family of fault-protected RS-485 transceivers. It shares pinout compatibility with other members like the SN65HVD1782, though data rate capabilities differ. The family is designed for reliable multi-drop communication in industrial settings where bus line faults are a concern.

Drivers, Receivers, Transceivers Replacement Considerations

The SN65HVD1781DR serves as the reel-pack equivalent. The SN65HVD1781DG4 is the lead-free version. Direct substitutes with identical pinouts include the SN65HVD1782D, provided the higher 10 Mbps speed is acceptable.