Radiation tolerant quad-channel, 3/1 digital isolator in space enhanced plastic


Product details


Integrated isolated power No Number of channels (#) 4 Forward/reverse channels 3/1 Isolation rating (Vrms) 3000 Data rate (Max) (Mbps) 100 Rating Space Surge voltage capability (Vpk) 5200 Current consumption per channel (DC) (Typ) (mA) 0.88 Current consumption per channel (1 Mbps) (Typ) (mA) 1.48 Operating temperature range (C) -55 to 125 Default output High, Low Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.25 Propagation delay (Typ) (ns) 10.7 open-in-new Find other Digital isolators

Package | Pins | Size

SSOP (DBQ) 16 29 mm² 4.9 x 6 open-in-new Find other Digital isolators


  • Radiation Tolerant
    • Total Ionizing Dose (TID) Characterized (ELDRS-Free) = 30 krad(Si)
    • TID RLAT/RHA = 30 krad(Si)
    • Single-Event Latch-up (SEL) Immune to LET = 43 MeV⋅cm2/mg at 125°C
    • Single-Event Dielectric Rupture (SEDR) Immune (43 MeV⋅cm2/mg) at 500 VDC
  • Space Enhanced Plastic (Space EP)
    • Meets NASA’s ASTM E595 Outgassing Spec
    • Vendor Item Drawing (VID) V62/21610
    • Military Temp Range (-55°C to 125°C)
    • One Wafer Fabrication Site
    • One Assembly and Test Site
    • Gold Bond Wire, NiPdAu Lead Finish
    • Wafer Lot Traceability
    • Extended Product Life Cycle
    • Extended Product Change Notification
  • 600 VRMS continous working voltage
  • Section 6.7:
    • DIN VDE V 0884-11:2017-01
    • UL 1577 component recognition program
  • 100 Mbps data rate
  • Wide supply range: 2.25 V to 5.5 V
  • 2.25-V to 5.5-V level translation
  • Default output low
  • Low power consumption, 1.5 mA per channel typical at 1 Mbps
  • Low propagation delay: 10.7 ns typical (5-V Supplies)
  • Low channel-to-channel skew: 4 ns max (5-V Supplies)
  • ±100 kV/µs typical CMTI
  • System-level ESD, EFT, Surge, and Magnetic Immunity
  • Small QSOP (DBQ-16) package

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The ISOS141-SEP radiation-tolerant device is a high-performance, quad-channel digital isolator in a small form factor 16-pin QSOP package. Each isolation channel has a logic input and output buffer separated by a double capacitive silicon dioxide (SiO2) insulation barrier. This device supports low Earth orbit (LEO) space applications with its high data rate of 100 Mbps, low propagation delay of 10.7 ns, and tight channel-to-channel skew of 4 ns. The ISOS141-SEP device has three forward and one reverse-direction channels and if the input power or signal is lost, the default output is low. The enable pins can be used to put the respective outputs in high impedance for multi-master driving applications and to reduce power consumption.

The ISOS141-SEP provides high electromagnetic immunity and low emissions with low power consumption, while isolating CMOS or LVCMOS digital I/Os. The device has a high common-mode transient immunity of 100 kV/µs and can ease system-level ESD, EFT, surge, and simplify emissions compliance through its innovative chip design.

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Technical documentation

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Type Title Date
* Data sheet ISOS141-SEP Radiation Tolerant High-Speed Quad-Channel Digital Isolator datasheet Mar. 05, 2021
* Radiation & reliability report ISOS141-SEP Neutron Displacement Damage Characterization Mar. 18, 2021
* Radiation & reliability report ISOS141-SEP Production Flow and Reliability Report Mar. 18, 2021
* Radiation & reliability report ISOS141-SEP Quad-Channel Digital Isolator TID Report Mar. 17, 2021
* Radiation & reliability report ISOS141-SEP Single-Event Latch-Up (SEL) Radiation Report Mar. 17, 2021
Application note Space-Grade, 30 krad, Isolated I2C Circuit Jun. 01, 2021
Application note Space-Grade, 30-krad, Isolated CAN Serial Transceiver Circuit Jun. 01, 2021
Application note Space-Grade, 30-krad, Isolated RS-422 Serial Transceiver Circuit Jun. 01, 2021
Selection guide TI Space Products (Rev. H) Jan. 27, 2021
Technical article How to select the right digital isolator for your design Oct. 21, 2020
Technical article Why signal isolation matters in 48-V HEV/EV systems Nov. 20, 2019
Technical article Staying on budget: How digital isolators are transforming field transmitters May 24, 2019
Technical article What are isolated digital inputs? Mar. 08, 2019

Design & development

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Hardware development

document-generic User guide

DIGI-ISO-EVM is an evaluaiton module used to evaluate any of the TI signle-channel, dual-channel, triple-channel, quad-channel or six-channel digital isolator devices in five different packages - 8-pin NB SOIC (D), 8-pin WB SOIC (DWV), 16-pin WB SOIC (DW), 16-pin ultra WB SOIC (DWW) and 16-pin QSOP (...)

  • Any TI digital isolator can be evaluated
  • Supports single-channel, dual-channel, triple-channel, quad-channel and six-channel devices
  • Supports D, DWV, DW, DWW and DBQ packages
  • Various Berg pins provided for easy testing

CAD/CAE symbols

Package Pins Download
SSOP (DBQ) 16 View options

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