TI-ISOS141-SEP.pdf
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ISOS141-SEP Radiation Tolerant High-Speed Quad-Channel Digital Isolator
1 Features
• 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⋅cm
2
/mg at 125°C
– Single-Event Dielectric Rupture (SEDR)
Immune (43 MeV⋅cm
2
/mg) at 500 V
DC
• 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 V
RMS
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
2 Applications
• Low Earth Orbit (LEO) Space Applications
• Signal Isolation (RS-422, RS-485, CAN, SPI)
• Gate Driver Isolation or Isolated Feedback for GaN
DC-DC converters
• Space-Grade Isolated DC/DC Module
• Spacecraft Battery Management System (BMS)
• Satellite Propulsion Power Processing Unit (PPU)
• Launcher & Lander Systems
• Communications Payload
• Radar Imaging Payload
3 Description
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 (SiO
2
) 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.
Device Information
PART NUMBER PACKAGE BODY SIZE (NOM)
ISOS141FDBQSEP
30 krad(Si) RLAT/RHA
16-lead
QSOP (DBQ)
4.90 mm × 3.90 mm
ISOS141FDBQTSEP
30 krad(Si) RLAT/RHA
ISOLATION
GND1 GND298
EN1 EN2107
OUTD IND116
INC OUTC125
INB OUTB134
INA OUTA143
GND1 GND2152
V
CC1
V
CC2
161
V
CCI
=Input supply, V
CC2
=Output supply
GND1=Input ground, GND2=Output ground
Simplified Schematic
ISOS141-SEP
SLLSFN1 – MAY 2021
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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