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THVD9491-SEP

ACTIVE

Radiation-tolerant, 3V to 5.5V RS-485 transceiver with flexible I/O supply and IEC ESD

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Data sheet

THVD9491-SEP

ACTIVE
Data sheet Order now

Product details

Number of receivers 1 Number of transmitters 1 Duplex Full Signaling rate (max) (Mbps) 20, 50 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -40 to 40 Common-mode range (V) -12 to 12 Number of nodes 256 Features 1.65-V I/O supply, Fault protection, IEC ESD protection, PROFIBUS Isolated No Supply current (max) (µA) 72000 Rating Space Operating temperature range (°C) -55 to 125
Number of receivers 1 Number of transmitters 1 Duplex Full Signaling rate (max) (Mbps) 20, 50 IEC 61000-4-2 contact (±V) 8000 Fault protection (V) -40 to 40 Common-mode range (V) -12 to 12 Number of nodes 256 Features 1.65-V I/O supply, Fault protection, IEC ESD protection, PROFIBUS Isolated No Supply current (max) (µA) 72000 Rating Space Operating temperature range (°C) -55 to 125
SOIC (D) 14 51.9 mm² (8.65 mm × 6 mm)
  • VID V62/24626
  • Meets or exceeds the requirements of the TIA/EIA-485A and TIA/EIA-422B standards
  • Total ionizing dose (TID) characterized up to 30krad (Si)
    • Total ionizing dose radiation lot acceptance testing (TID RLAT) for every wafer lot to 30krad (Si)
  • Single-event effects (SEE) characterized
    • Single event latch-up (SEL) immune to linear energy transfer (LET) = 43MeV⋅cm2 /mg at 125°C
  • Space enhanced plastic (Space EP)
    • Controlled baseline
    • One assembly and test site
    • One fabrication site
    • Gold bond wire
    • NiPdAu lead finish
    • Military temp range (-55°C to 125°C)
    • Extended product life cycle
    • Product traceability
    • Meets the NASA ASTM E595 outgassing specification
  • 3V to 5.5V supply voltage
  • 1.65V to 5.5V Supply for data and enable signals
  • SLR Pin Selectable Data Rates:
    • 20Mbps and 50Mbps
  • Bus I/O protection
    • ±40V DC bus fault
    • ±16kV HBM ESD
    • ±8kV IEC 61000-4-2 contact discharge
    • ±4kV IEC 61000-4-4 fast transient burst
  • Symmetric common mode range: ±12V
  • Enhanced receiver hysteresis for noise immunity
  • Glitch-free power-up or down for hot plug-in capability
  • Open, short, and idle bus failsafe
  • 1/8 unit load (up to 256 bus nodes)
  • Leaded 14-pin SOIC package
  • VID V62/24626
  • Meets or exceeds the requirements of the TIA/EIA-485A and TIA/EIA-422B standards
  • Total ionizing dose (TID) characterized up to 30krad (Si)
    • Total ionizing dose radiation lot acceptance testing (TID RLAT) for every wafer lot to 30krad (Si)
  • Single-event effects (SEE) characterized
    • Single event latch-up (SEL) immune to linear energy transfer (LET) = 43MeV⋅cm2 /mg at 125°C
  • Space enhanced plastic (Space EP)
    • Controlled baseline
    • One assembly and test site
    • One fabrication site
    • Gold bond wire
    • NiPdAu lead finish
    • Military temp range (-55°C to 125°C)
    • Extended product life cycle
    • Product traceability
    • Meets the NASA ASTM E595 outgassing specification
  • 3V to 5.5V supply voltage
  • 1.65V to 5.5V Supply for data and enable signals
  • SLR Pin Selectable Data Rates:
    • 20Mbps and 50Mbps
  • Bus I/O protection
    • ±40V DC bus fault
    • ±16kV HBM ESD
    • ±8kV IEC 61000-4-2 contact discharge
    • ±4kV IEC 61000-4-4 fast transient burst
  • Symmetric common mode range: ±12V
  • Enhanced receiver hysteresis for noise immunity
  • Glitch-free power-up or down for hot plug-in capability
  • Open, short, and idle bus failsafe
  • 1/8 unit load (up to 256 bus nodes)
  • Leaded 14-pin SOIC package

THVD9491-SEP is a space enhanced, ±40V fault-protected full-duplex RS-422/RS-485 transceiver using a 1.65V to 5.5V logic supply for data and enable logic signals, and a 3V to 5.5V bus side supply. The device has a slew rate select feature that enables the use at two maximum speeds based on the SLR pin setting.

The device features integrated IEC ESD protection, eliminating the need for external system-level protection components. The ±12V input common-mode range makes reliable data communication over longer cable run lengths and/or in the presence of large ground loop voltages. Enhanced 250mV receiver hysteresis provides high noise rejection. In addition, the receiver fail-safe feature makes sure of a logic high when the inputs are open or shorted together.

THVD9491-SEP device is available in a standard 14-pin SOIC package.

THVD9491-SEP is a space enhanced, ±40V fault-protected full-duplex RS-422/RS-485 transceiver using a 1.65V to 5.5V logic supply for data and enable logic signals, and a 3V to 5.5V bus side supply. The device has a slew rate select feature that enables the use at two maximum speeds based on the SLR pin setting.

The device features integrated IEC ESD protection, eliminating the need for external system-level protection components. The ±12V input common-mode range makes reliable data communication over longer cable run lengths and/or in the presence of large ground loop voltages. Enhanced 250mV receiver hysteresis provides high noise rejection. In addition, the receiver fail-safe feature makes sure of a logic high when the inputs are open or shorted together.

THVD9491-SEP device is available in a standard 14-pin SOIC package.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet THVD9491-SEP Radiation Tolerant 3V to 5.5V RS-485 Transceiver with Flexible I/O Supply and IEC ESD Protection datasheet (Rev. C) PDF | HTML Sep 4, 2025
* Radiation & reliability report THVD9491-SEP SEE Radiation Report (Rev. A) PDF | HTML Apr 1, 2025
* Radiation & reliability report THVD9491-SEP Production Flow and Reliability Report PDF | HTML Jan 2, 2025
* Radiation & reliability report THVD9491-SEP Total Ionizing Dose (TID) Report PDF | HTML Jan 2, 2025
* VID THVD9491-SEP VID THVD9491-SEP VIP V62-24626 Jul 9, 2025

Design & development

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Evaluation board

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