optoisolators

Si8611

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This Silicon Labs datasheet covers the Si861x/2x family of low-power, single and dual-channel digital isolators. It details industrial and automotive-grade options for applications like medical electronics and EVs. Key parameters include up to 150 Mbps data rates, less than 10 ns propagation delay, 2.5–5.5 V supply voltage, and isolation ratings from 2.5 kV to 5 kV RMS. Devices feature Schmitt trigger inputs, selectable fail-safe modes, and wide operating temperature ranges from –40 to 125 °C.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
output voltage -500 mV — —
output current — 10 mA —
supply voltage range 2.5 V — 5.5 V
operating temperature -40 °C — 125 °C
power dissipation — 150 mW —
isolation voltage — 1.2 kV —
propagation delay 5 ns 8 ns 13 ns SeeFigure 4.1 Propagation Delay Timing on page 15
data rate 0 bps — 150 Mbps
rise time — 2.5 ns 4 ns CL = 15 pFSeeFigure 4.1 Propagation Delay Timing on page 15
fall time — 2.5 ns 4 ns CL = 15 pFSeeFigure 4.1 Propagation Delay Timing on page 15
output voltage high — 4.8 V — Ioh = -4 mA
output voltage low — 200 mV 400 mV Iol = 4 mA
cmti — 50 GV/s —
output count — 1 —
channel count — 1 —
03 — Alternatives

Closest matches to Si8611

Si8612B-SV 2.1× higher isolation voltage, similar cmti, similar data rate
ISO7220M 2.6× higher power dissipation, 2.5× lower fall time, 2.5× lower rise time
ISO7240C 8.0× lower propagation delay, 6.0× lower data rate, 2.1× lower isolation voltage
ADuM1200AR 12.5× higher propagation delay, 4.0× higher rise time, 2.1× higher isolation voltage
ADuM1201ARZ 12.5× higher propagation delay, 4.0× higher rise time, 2.1× higher isolation voltage
Si8230 8.0× higher rise time, 4.0× higher output voltage, 3.8× higher propagation delay
04 — FAQ

Frequently asked questions

What is the channel count of the Si8611?

The channel count is 1.

What is the common-mode transient immunity (CMTI) of the Si8611?

The common-mode transient immunity (CMTI) of the Si8611 is 50 GV/s.

What is the data rate of the Si8611?

The data rate is 150 Mbps.

What is the fall time of the Si8611 when CL = 15 pF?

The fall time is 2.5 ns when CL = 15 pF.

What is the isolation voltage of the Si8611?

The isolation voltage is 1.2 kV.

What is the maximum operating temperature for the Si8611?

The maximum operating temperature is 125 °C.

What is the output count for the Si8611?

The output count is 1.

What is the output current of the Si8611?

The output current is 10 mA.

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