The RAA7884QR is a ±16.5kV IEC61000-4-2 ESD protected, 3.0V to 5.5V powered, quad receiver designed for balanced communication using the RS-485 and RS-422 standards. With low input currents (±200µA), the receiver presents a 1/4 unit load to the RS-485 bus and allows up to 128 receivers on the bus.

The RAA7884QR is a high data rate receiver that operates at data rates up to 80Mbps. With an 8ns maximum propagation delay skew (tolerance), it ensures excellent part-to-part matching. The receiver outputs are tri-statable and include a hot plug feature to keep them disabled during power-up and power-down.

Features

  • IEC61000 ESD protection (RS-485 inputs): ±16.5kV
    • Class 3 ESD on all other pins: >8kV HBM
  • Wide supply range: 3.0V to 5.5V
  • Wide common-mode range: -7V to +12V
  • Low part-to-part propagation delay tolerance: 8ns (maximum)
  • Specified for +125°C operation
  • Fail-safe open Rx inputs
  • 1/4 unit load allows 128 devices on the bus
  • Available in industry standard pinout
  • High data rate of up to 80Mbps
  • Low shutdown supply current: 15µA
  • Tri-statable Rx outputs
  • 5V tolerant logic inputs when VCC = 3.3V
  • RoHS Compliant

Applications

  • Telecom equipment
  • Motor controllers/encoders
  • Programmable logic controllers
  • Industrial/process control networks

descriptionDocumentation

Title language Type Format File Size Date
star RAA7884QR Datasheet Rev.2.00 Datasheet PDF 382 KB
R15AN0004: How to Determine the Length and Characteristic Impedance of a Data Transmission Cable Rev.1.00 Application Note PDF 290 KB
AN9769: An Overview of Electromagnetic and Lightning Induced Voltage Transients Application Note PDF 677 KB
R15AN0002: RS-485 Transient Protection in Industrial DC-Supply Buses Rev.1.00 Application Note PDF 178 KB
AN1991: Isolating RS-485 Interfaces with High-Speed Digital Optocouplers Application Note PDF 513 KB
AN1987: RS-485 External Fail-Safe Biasing for Isolated Long Haul Buses Application Note PDF 443 KB
AN1986: External Fail-Safe Biasing of RS-485 Networks Application Note PDF 582 KB
AN1985: Transient Protection for the Standard RS-485 Transceiver: ISL3152E Application Note PDF 335 KB
AN1989: RS-422 vs RS-485: Similarities and Key Differences Application Note PDF 440 KB
AN1976: Important Transient Immunity Tests for RS-485 Networks Application Note PDF 338 KB
AN1977: Transient Voltage Suppressors: Operation and Features Application Note PDF 365 KB
AN1978: Surge Protection for Intersil's Standard RS-485 Transceivers Application Note PDF 369 KB
AN1979: Surge Protection simplified with Intersil's Overvoltage Protected (OVP) Transceivers Application Note PDF 500 KB
AN1980: Ground Potential Differences: Origin and Remedies Application Note PDF 375 KB
R15ZZ0002: Calculating the Power Dissipation of an RS-485 Driver Other PDF 150 KB
R15ZZ0001: Calculating the Power Dissipation of an RS-422 Driver Other PDF 165 KB
TB506: Functional Principles of RS-485 Drivers and Receivers Other PDF 156 KB
TB511: The Unit Load Concept Other PDF 253 KB
TB509: Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers Technical Brief PDF 300 KB