The RAA7884QT is a ±16.5kV IEC61000-4-2 ESD protected, 3.0V to 5.5V powered, Quad transmitter designed for balanced communication using the RS-422 standard. With low output leakage currents (±10µA), the driver presents a low load to the RS-422 bus.

The driver (Tx) outputs are tri-statable and incorporate a hot plug feature to keep them disabled during power-up and power-down. The RAA7884QT has a common EN/EN.

Basic Information
Parameters RAA7884QT
Production Status Mass Production
Key Feature High Speed
# of Rx 4
Devices Allowed on Bus 256
Half/Full Duplex N/A
High ESD Protection Yes-IEC61000-4-2
Hot Plug Yes
Data Rate 50 Mbps
Supply Voltage Vcc (Min) (V) 3
Supply Voltage Vcc (Max) (V) 5.5
Slew Rate Limited No
Tx/Rx Enable Yes - Group Enables
IS Enabled/Disabled 800 µA
VL Pin No
Qualification Level Standard
Supply Voltage Vcc Range (V) 3.0 to 5.5
Can Sample Yes
Temperature Range -40 to +125
Orderable Part Name Product Longevity Program (PLP) Production Status 1000 Piece Budgetary Price For MLQ, please inquire Minimum Order Quantity Package Info Distributors Request Samples Buy Direct
RAA7884QT4GSP#HB0 - Mass Production call 2500 - 0 Distributors - Buy
RAA7884QT4GSP#AB0 - Mass Production call 1920 - 0 Distributors - Buy


  • IEC61000 ESD protection on RS-422 outputs: ±16.5kV
    • Class 3 ESD level on all other pins: 12kV HBM
    • High machine model ESD level on all pins: 700V
  • Wide supply range: 3.0V to 5.5V
  • Specified for +125°C operation
  • Available in industry standard pinout
  • Hot plug Tx outputs remain tri-stated during power-up and power-down
  • Low Tx leakage allows > 256 devices on the bus
  • High data rate of 50Mbps minimum
  • Low quiescent supply current: 0.8mA (maximum)
    • Low shutdown supply current: 60µA
  • Current limiting and thermal shutdown for driver overload protection
  • Tri-statable Tx outputs
  • 5V tolerant logic inputs when VCC = 3.3V
  • Pb-free (RoHS compliant)


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


Title language Type Format File Size Date
star RAA7884QT Datasheet Rev.2.00 Datasheet PDF 701 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
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