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SN65HVD11D

3.3V RS-485 half-duplex transceiver, 250kbps, 256 nodes, 8-SOIC

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Manufacturer Part：

SN65HVD11D

Package：

8-SOIC (4.9 x 6.0 x 1.5 mm)

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Description

Product Overview

The SN65HVD11D from Texas Instruments is a 3.3V RS-485 half-duplex transceiver in an 8-SOIC package. Rated for 250kbps with slew-rate-limited drivers, it supports up to 256 nodes on the bus with 1/4 unit load receiver input impedance.

Key Specifications

Protocol RS-485 / RS-422
Duplex Half Duplex
Data Rate 250kbps
Supply Voltage 3V ~ 3.6V
Nodes on Bus Up to 256 (1/4 unit load)
ESD Protection ±15kV (HBM)
Package 8-SOIC
Operating Temperature -40°C to +85°C

Features

  • 3.3V low-power operation
  • 1/4 unit load allows 256 nodes on bus
  • Slew-rate-limited for low EMI
  • ±15kV ESD protection on bus pins
  • Open-circuit fail-safe receiver
  • Low standby current
  • Compatible with 5V logic

Applications

  • Industrial automation networks
  • Building environmental control systems
  • Motor drive communication interfaces
  • Security and access control systems
  • Point-of-sale terminal networks

The SN65HVD11D from Texas Instruments is a 3.3V-powered RS-485 half-duplex transceiver designed for multipoint bus communication. Its 1/4 unit load receiver input impedance allows up to 256 transceivers on a single bus, four times the standard 32-node limit. The slew-rate-limited driver operates at 250kbps, minimizing EMI and reflections on improperly terminated cables. With ±15kV HBM ESD protection and a wide -7V to +12V common-mode input range, the SN65HVD11D is robust enough for harsh industrial environments.

The SN65HVD11D converts single-ended TTL/CMOS logic levels to differential RS-485 bus signals for half-duplex communication. The driver and receiver share the A and B bus pins, with DE and RE controls enabling either transmit or receive mode. The 1/4 unit load design reduces input current to 48uA per receiver, enabling 256 nodes on the bus without exceeding the RS-485 32 unit-load limit. The slew-rate-limited driver output slows edge rates to reduce high-frequency content, minimizing EMI and reflections on long cables.

Pin Name Type Function
1 RO Output Receiver output
2 RE Input Receiver enable (active low)
3 DE Input Driver enable (active high)
4 DI Input Driver data input
5 GND Power Ground
6 A I/O Non-inverting bus pin
7 B I/O Inverting bus pin
8 VCC Power 3.3V supply
  • Industrial automation (Modbus RTU, Profibus)
  • Building HVAC and lighting control networks
  • Motor drive and inverter communication
  • Security system access control networks
  • Battery-powered remote sensor networks
Manufacturer Part Number Package Notes
ADI ADM3483EARZ 8-SOIC 3.3V, 250kbps, half-duplex
ADI MAX3485ECSA+ 8-SOIC 3.3V, 250kbps, half-duplex
TI SN65HVD10D 8-SOIC 3.3V, 10Mbps, full-duplex
TI SN65HVD12D 8-SOIC 3.3V, 1Mbps, half-duplex
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Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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