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HCPL2611M
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onsemi / Optoisolators

HCPL2611M onsemi Optoisolator – 10 Mbps, 5000 Vrms

MPN HCPL2611M
Active Spot Stock · 24-48h Dispatch 100% Original Sealed

onsemi HCPL2611M, single-channel optoisolator, 10 Mbps data rate, 5000 Vrms isolation, open collector output, 8-DIP through-hole package, -40°C to 100°C operating range.

In Stock: 526 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$2.34 / pc
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Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$2.34
10+ pcs
$2.11
30+ pcs
$1.92
100+ pcs
$1.73
500+ pcs
$1.61
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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (17)
Package / Case 8-DIP (0.300", 7.62mm)
Supply Voltage 4.5V ~ 5.5V
Output / Current 50 mA
ALT
Facing long factory lead times or allocation on HCPL2611M? Verified pin-compatible alternatives available with active Shenzhen stock and 100% solder-ready footprint match.
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Full Technical Specifications

17 Parameters
HCPL2611M specifications
Parameter / AttributeSpecification / Value
Input typeDC
Output typeOpen Collector
MountingThrough Hole
Supply voltage4.5V ~ 5.5V
Voltage - isolation5000Vrms
Voltage - forward (Vf)1.45V
Current - output (Channel)50 mA
Current - DC forward (If)50mA
Operating temperature-40°C ~ 100°C
PackageTube
Data rate10Mbps
Case8-DIP (0.300\", 7.62mm)
Channels1
Inputs - side 1/Side 21/0
Rise (Fall time)50ns, 12ns
Propagation delay tpLH (tpHL)75ns, 75ns
Common mode transient immunity10kV/µs
100% Footprint Match · Solder-Ready (No PCB Redesign Needed)

Need Stock or a Drop-in Second-Source for HCPL2611M?

Package: DIP-8 / SOP-8 · Pin-compatible replacements with immediate Shenzhen spot stock

Footprint Match 97%
Supply Chain & Allocation Reality:

The 6N137 is the industrial signal isolator of servo drives, PLC I/O, gate-drive interfaces and serial links: a 10 megabit logic-gate optocoupler with a Schottky-clamped open-collector output, an enable pin, and the same 8-pin body as half the opto universe. Two things make it a page of its own. First, the 6N136 it shares a family name with is a 1 megabit phototransistor part whose pins 5, 6 and 7 mean something else entirely - same body, different species. Second, the enable pin: floating it disables the output to a permanent high, which is the number one mystery of hand-wired 6N137 circuits. The 2500V isolation, ~45-75ns delays and the HCPL-2601/2611 noise-shielded versions complete the working picture.

Verified Pin-Compatible Replacements (3 verified alternatives)

6N136 LiteOn / onsemi / Isocom DIP-8
Functional Equivalent
Availability & Target Pricing:

The 1Mbps Phototransistor Sibling

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The phototransistor version in the same 8-pin body: no VCC pin, no enable pin, CTR-based output with a base pin (7) for a speed resistor, and about one megabit of bandwidth.

No logic supply at all - the output side is a transistor, not a gate: the pin that is VCC on a 6N137 is unused on the 6N136.

Compatibility & Drop-In Notes: The honest use of this card: replacing a slow part with the 10Mbps logic-gate family is an upgrade that needs decoupling and a pull-up; replacing the 137 with the 136 is a redesign that loses the enable, the logic output and the speed.
Package & Solder Footprint: Read the pin drawing, never the family name - the LED side matches, the output side does not.
Shenzhen Warehouse Stock & MOQ: Stocked; the slow lane with its differences stated.
Request Volume Quote for 6N136 Compare HCPL2611M vs 6N136 Spec Matrix
HCPL-2601 Broadcom (HP lineage) DIP-8
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Noise-Shielded Same Function

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The same 10 megabit logic-gate design from the HP/Avago lineage with a specified improved internal noise shield - the minimum common-mode immunity is a guaranteed number where the 6N137 datasheets lean on typicals.

Same 5V logic side and enable-pin dance; the HCPL-2611 raises the guaranteed CMR further for the nastiest motor-drive corners.

Compatibility & Drop-In Notes: The choice rule: where a 6N137 works, the 2601 works identically; where a 6N137 glitches mysteriously near power switching, the specified-immunity part is the repair - not a faster pull-up.
Package & Solder Footprint: Pin-shared with the 6N137.
Shenzhen Warehouse Stock & MOQ: Stocked; the datacom-name version of the same socket.
Request Volume Quote for HCPL-2601 Compare HCPL2611M vs HCPL-2601 Spec Matrix
EL2601 / ICPL2601 Everlight / Isocom (clone lineage) DIP-8 / SOP-8
100% Drop-in (Zero Code Change)
Availability & Target Pricing:

The Volume Clone Shelf

Shenzhen Spot Stock (24-48h Dispatch)

Electrical & Core Specs:

The industry clones of the 2601/6N137 function: 10 megabit, open-collector Schottky-clamped output, enable input, same pin map - at the price points that put them in serial and adapter hardware.

The enable pin carries its own discipline: about 5.5V maximum and never more than 500mV above VCC - a rule worth stating because it is the first pin killed in hand-built rigs.

Compatibility & Drop-In Notes: The clones exist because the original function is generic; the buying question is only whether the lot behind the price holds the datasheet numbers.
Package & Solder Footprint: Pin map identical to the 6N137/2601 line.
Shenzhen Warehouse Stock & MOQ: Volume pricing; sample-screened lots on request.
Request Volume Quote for EL2601 / ICPL2601 Compare HCPL2611M vs EL2601 / ICPL2601 Spec Matrix
Buyer & Quality Checklist for Sourcing Alternatives
  • The enable pin (pin 7) has a truth table, not a default: tied high the output follows the input inverted (input high gives output low); floating or tied low it disables to a permanent high. The always-high 6N137 is almost always an orphaned enable pin.
  • The output is open-collector and inverting: it sinks when the input LED is on - a pull-up resistor is a functional part of the circuit, and positive-logic assumptions about the output polarity need the inversion designed in.
  • The 6N136 shares the body and moves the pins: on the 136, pins 5/6/7 are Emitter/Collector/Base (phototransistor world, no VCC, no enable); on the 137 they are GND/Output/Enable. Never swap across the two by position.
  • VCC (pin 8) is 4.5V to 5.5V with the 0.1uF bypass to pin 5 as part of the design: a 10 megabit part without its decoupling produces the intermittent glitches that get blamed on the processor.
  • The speed ladder inside the family is real: 6N135/6N136 are 1 megabit phototransistor parts; 6N137/6N138/6N139 are the 10 megabit logic-gate row, with 138/139 tuned for lower input current. Match the drive current and the bandwidth to the job.
  • Where it sits matters: these parts live between a controller and a power stage, and their specified common-mode immunity (the HCPL-2601/2611 grades) is the difference between a clean drive and a phantom fault in welder and servo environments.
Frequently Asked Technical Questions

Q: Can a 6N136 replace a 6N137?

A: Same 8-pin body, different species: the 6N136 is a 1 megabit phototransistor part with no VCC and no enable, and its pins 5, 6 and 7 are Emitter, Collector and Base where the 6N137 has GND, Output and Enable. The LED side matches; nothing else should be assumed.

Q: Why is my 6N137 output always high?

A: Two candidates: the enable pin (7) is floating or tied low, which disables the output to a permanent high, or the open-collector output is missing its pull-up resistor. Both are wiring facts, not part failures.

Q: What is the difference between the 6N137 and the HCPL-2601?

A: The same 10 megabit logic-gate function and pinout; the HCPL-2601 adds a specified improved noise shield (guaranteed common-mode immunity where the 6N137 relies on typicals), and the HCPL-2611 raises that guarantee further - the motor-drive grade of the same socket.

Technical Details & Description

What the 10 Mbps data rate and 5000 Vrms isolation mean for your BOM

The HCPL2611M is a single-channel optoisolator from onsemi that delivers a 10 Mbps data rate with 5000 Vrms isolation — the combination that makes it a fit for industrial digital interfaces where galvanic separation is non-negotiable. With a propagation delay of 75 ns max (both tpLH and tpHL), the part keeps timing margins tight enough for 10 Mbps signaling — the 50 ns rise and 12 ns fall times mean the output edges stay clean at that rate.

Common-mode transient immunity — the spec that separates industrial optocouplers from logic-level parts

A part with lower CMTI (say 1 kV/µs) would latch or toggle on every IGBT switching edge in a 400 V drive bus — the HCPL2611M's 10 kV/µs rating means it stays quiet through those events.

The -40°C to 100°C operating temperature covers industrial enclosures, outdoor cabinets, and engine-bay environments without needing a military-grade part.

Frequently asked questions

What is the closest pin-compatible alternative to HCPL2611M?

The base product number HCPL2611 (without the 'M' suffix) is the same die in the same 8-DIP package, but the 'M' variant may carry a different temperature grade or test flow — confirm the operating temperature range and CMTI rating against your application before substituting.

Can HCPL2611M be used with a 5V supply?

The input LED forward voltage is 1.45 V typical, so a 5 V logic signal with a current-limiting resistor will drive it.

HCPL2611M
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