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Texas Instruments ISO7821LLSDW — Digital Isolators
Texas Instruments

TI ISO7821LLSDW Digital Isolator, 2-Ch, 150 Mbps, 5700 Vrms

MPNISO7821LLSDW
End of Life

Texas Instruments ISO7821LLSDW, General Purpose digital isolator, Capacitive Coupling, 2 unidirectional channels, 150Mbps data rate, 5700Vrms isolation, 3V~5.5V supply, -55°C~125°C, 16-SOIC package, Surface Mount, Tube.

$11.43Ref. price · indicative, final on quote
ISO7821LLSDW datasheet
Packaging16-SOIC (0.295", 7.50mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

ISO7821LLSDW Technical Specifications
ParameterValue
TypeGeneral Purpose
Channel typeUnidirectional
Mounting typeSurface Mount
Voltage3V ~ 5.5V
Voltage - isolation5700Vrms
Isolated powerNo
Operating temperature-55°C ~ 125°C
PackageTube
Data rate150Mbps
TechnologyCapacitive Coupling
Case16-SOIC (0.295\", 7.50mm Width)
Number of channels2
Inputs - side 1/Side 21/1
Propagation delay tpLH (tpHL)25ns, 25ns
Common mode transient immunity100kV/µs

Product details

Capacitive-coupled isolation for noisy environments

The Texas Instruments ISO7821LLSDW is a 2-channel, unidirectional digital isolator using capacitive coupling to pass signals across a reinforced isolation barrier rated at 5700 Vrms.

5700 Vrms isolation — what it buys you

Reinforced isolation at 5700 Vrms means this part can withstand a 5.7 kV potential between input and output without breakdown, tested per IEC 60747-5-5. For a 400 V motor drive or a 480 VAC power supply, that margin covers surge events and transient overvoltages without derating. The 100 kV/µs common-mode transient immunity (CMTI) ensures that fast-switching edges from a half-bridge or IGBT stage do not corrupt the data crossing the barrier — a spec that matters when the isolation amplifier or gate-driver feedback path runs at several hundred kHz.

Frequently asked questions

What is the data rate of ISO7821LLSDW?

It supports a maximum data rate of 150 Mbps, with a propagation delay of 25 ns max in either direction.

Is ISO7821LLSDW obsolete?

It is currently available through normal distribution and independent channels.

What is the replacement or equivalent for ISO7821LLSDW?

The closest functional peer is the ISO7830DWWR, which offers 3 channels and a lower 100 Mbps data rate but shares the same 5700 Vrms isolation and 16-SOIC wide-body package. The ISO7721FBDWR is a 2-channel alternative with 5000 Vrms isolation and 100 Mbps data rate. Neither is a drop-in replacement — the channel count and data rate differ.