component

ADUM1281BRZ

Public Made by Adom

by adom

Analog Devices Digital Isolators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentinterface icsadum1281brzfactory-2.0.0extractor-text

Verified ADUM1281BRZ

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ADUM1281BRZ · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 18-page datasheet
  • ✓distributor: lcsc C208174, digikey 505-ADUM1281BRZ-ND, mouser 584-ADUM1281BRZ
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-_1v0taoi/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ adum1281brz.kicad_sym✓ adum1281brz.kicad_mod✓ adum1281brz.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 3d ago
viewers adum1281brz: viewers · Ray 3d ago
adum1281brz-etched.glb Publish 0.1.0 · Ray 3d ago
adum1281brz-etched.step adum1281brz: factory component page (tier=mfr) · Ray 3d ago
adum1281brz-hero.glb adum1281brz: hero GLB from the etched model (keeps the MPN mark) · Ray 3d ago
adum1281brz-hero.overlay.json Publish 0.1.0 · Ray 3d ago
adum1281brz.glb Publish 0.1.0 · Ray 3d ago
adum1281brz.kicad_mod Publish 0.1.0 · Ray 3d ago
adum1281brz.kicad_sym Publish 0.1.0 · Ray 3d ago
adum1281brz.lbr Publish 0.1.0 · Ray 3d ago
adum1281brz.step Publish 0.1.0 · Ray 3d ago
package.json Publish 0.1.0 · Ray 3d ago
page.json Set visibility: public · Ray 3d ago
README.md Publish 0.1.0 · Ray 3d ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 3d ago

ADUM1281BRZ

Analog Devices · Digital Isolators · SOIC-8

ADUM1281BRZ from Analog Devices, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VDD1 power_in Supply voltage for isolator side 1 (3.135 V to 5.5 V).
2 VOA output Logic output A.
3 VIB input Logic input B.
4 GND1 power_in Ground 1, ground reference for isolator side 1.
5 GND2 power_in Ground 2, ground reference for isolator side 2.
6 VOB output Logic output B.
7 VIA input Logic input A.
8 VDD2 power_in Supply voltage for isolator side 2 (3.135 V to 5.5 V).

Key specifications

Parameter Value
Manufacturer Analog Devices
Package SOIC-8
Category Interface ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Logic High Input Threshold VIH 0.7 VDDx 3
Logic Low Input Threshold VIL 0.3 VDDx 3
Supply Voltage VDD1, VDD2 3.135 5.5 V A, B, and C Grades 10
Operating Temperature TA -40 125 °C 10
Input Signal Rise and Fall Times 1 ms 10
Pulse Width (5 V) PW 40 ns Within PWD limit; B grade 3
Data Rate (5 V) 25 Mbps Within PWD limit; B grade 3
Propagation Delay (5 V) tPHL, tPLH 35 ns 50% input to 50% output; B grade 3
Pulse Width Distortion (5 V) PWD 3 ns /tPLH − tPHL/; B grade 3
Propagation Delay Skew (5 V) tPSK 12 ns Between any two units at same operating conditions; B grade 3
Channel Matching Codirectional (5 V) tPSKCD 3 ns B grade 3
Channel Matching Opposing-Direction (5 V) tPSKOD 6 ns B grade 3
IDD1 Supply Current 25 Mbps (5 V) IDD1 4.9 6 mA ADuM1281, 25 Mbps, no load 3
IDD2 Supply Current 25 Mbps (5 V) IDD2 4.7 6.4 mA ADuM1281, 25 Mbps, no load 3
IDD1 Supply Current 1 Mbps (5 V) IDD1 2.1 2.6 mA ADuM1281, 1 Mbps, no load 3
IDD2 Supply Current 1 Mbps (5 V) IDD2 2.3 2.9 mA ADuM1281, 1 Mbps, no load 3
Logic Low Output Voltage (5 V) VOL 0 0.1 V IOx = 20 µA, VIx = VIxL 3
Logic Low Output Voltage (5 V) VOL 0.2 0.4 V IOx = 3.2 mA, VIx = VIxL 3
Input Current per Channel II -10 0.01 10 µA 0 V ≤ VIx ≤ VDDx 3
Quiescent Input Supply Current (5 V) IDDI(Q) 0.54 0.8 mA 3
Quiescent Output Supply Current (5 V) IDDO(Q) 1.6 2 mA 3
Common-Mode Transient Immunity (5 V) /CM/ 25 35 kV/µs VIx = VDDx, VCM = 1000 V, transient magnitude = 800 V 4
Propagation Delay (3.3 V) tPHL, tPLH 35 ns 50% input to 50% output; B grade 4
Pulse Width Distortion (3.3 V) PWD 3 ns /tPLH − tPHL/; B grade 4
Propagation Delay Skew (3.3 V) tPSK 16 ns Between any two units at same operating conditions; B grade 4
Channel Matching Codirectional (3.3 V) tPSKCD 3 ns B grade 4
Channel Matching Opposing-Direction (3.3 V) tPSKOD 6 ns B grade 4
IDD1 Supply Current 25 Mbps (3.3 V) IDD1 3.8 5 mA ADuM1281, 25 Mbps, no load 4
IDD2 Supply Current 25 Mbps (3.3 V) IDD2 3.9 6.2 mA ADuM1281, 25 Mbps, no load 4
IDD1 Supply Current 1 Mbps (3.3 V) IDD1 1.6 2.1 mA ADuM1281, 1 Mbps, no load 4
IDD2 Supply Current 1 Mbps (3.3 V) IDD2 1.7 2.3 mA ADuM1281, 1 Mbps, no load 4
Logic Low Output Voltage (3.3 V) VOL 0 0.1 V IOx = 20 µA, VIx = VIxL 5
Logic Low Output Voltage (3.3 V) VOL 0.2 0.4 V IOx = 3.2 mA, VIx = VIxL 5
Quiescent Input Supply Current (3.3 V) IDDI(Q) 0.4 0.6 mA 5
Quiescent Output Supply Current (3.3 V) IDDO(Q) 1.2 1.7 mA 5
Common-Mode Transient Immunity (3.3 V) /CM/ 25 35 kV/µs VIx = VDDx, VCM = 1000 V, transient magnitude = 800 V 5
Storage Temperature TST -65 150 °C TA = 25°C 11
Ambient Operating Temperature TA -40 125 °C 11
Supply Voltages VDD1, VDD2 -0.5 7 V 11
Input Voltages VIA, VIB -0.5 V Maximum is VDDI + 0.5 V 11
Output Voltages VOA, VOB -0.5 V Maximum is VDD2 + 0.5 V 11
Average Output Current per Pin, Side 1 IO1 -10 10 mA 11
Average Output Current per Pin, Side 2 IO2 -10 10 mA 11
Common-Mode Transients -100 100 kV/µs Across the insulation barrier 11
Junction-to-Ambient Thermal Resistance θJA 85 °C/W Thermocouple located at center of package underside 8
Resistance (Input-to-Output) RI-O 1013 Ω 8
Capacitance (Input-to-Output) CI-O 2 pF f = 1 MHz 8
Input Capacitance CI 4 pF From any input data pin to ground 8
Logic High Output Voltage (5 V) VOH 5 V IOx = −20 µA, VIx = VIxH; min is VDDx − 0.1 3
Logic High Output Voltage (5 V) VOH 4.8 V IOx = −3.2 mA, VIx = VIxH; min is VDDx − 0.4 3
Change vs. Temperature (5 V) 3 ps/°C B grade 3
Jitter (5 V) 2 ns B grade 3
Positive VDDx Threshold VDDXUV+ 2.75 V 4
Negative VDDx Threshold VDDXUV− 2.65 V 4
Rated Dielectric Insulation Voltage VISO 3000 VRMS 1-minute duration 9

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing pC In accordance with DIN EN IEC 60747-17 (VDE 0884-17), each ADuM1280/ADuM1281/ADuM1285/ADuM1286 is proof tested by applying an insulation test voltage ≥ 1050 VPEAK for 1 second (partial discharge detec 8

CAD (KiCad official)

  • Symbol: ADUM1281BRZ
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: adum1281brz-etched.step / adum1281brz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); adum1281brz.step / adum1281brz.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (18 pp, sha256 9143762bd346e43a, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF