ACPL-227-56CE Equivalent & Substitute Parts

Part Overview

The ACPL-227-56CE is a 2-channel optoisolator with transistor output manufactured by Broadcom Limited. This component provides 3000Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation in 8-SOIC surface mount packages. The part is currently active in production with 812 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, isolation voltage ratings, channel configuration, and mechanical compatibility within the optoisolator product category.

Key Parameters

Parameter	ACPL-227-56CE
Manufacturer	Broadcom Limited
Number of Channels	2
Voltage - Isolation	3000Vrms
Current Transfer Ratio (Min)	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-55°C ~ 110°C
Package / Case	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the ACPL-227-56CE are classified into two categories based on electrical parameter alignment:

Category 1: Parametric Equivalent (Direct Substitution) The ACPL-227-50CE from Broadcom Limited matches all critical electrical parameters of the main part: 2 channels, 3000Vrms isolation, 200-400% current transfer ratio at 5mA, 80V maximum output voltage, 50mA per-channel output current, and identical operating temperature range (-55°C to 110°C). Package dimensions differ slightly (8-SOIC 0.173" vs. standard 8-SOIC), but both are surface mount 8-SOIC configurations. This part is suitable for direct replacement in applications where the main part is unavailable.

Category 2: Functional Alternatives (Higher Isolation Voltage) Parts from Vishay Semiconductor Opto Division (ILD1206T, ILD1207T, ILD205T, ILD206T, ILD217T) and onsemi (MOCD207D2M, MOCD207M, MOCD207R2M, MOCD207R2VM) provide higher isolation voltage ratings (4000Vrms or 2500Vrms) with 2-channel transistor output in 8-SOIC packages. These alternatives are suitable when higher isolation margins are required or when the main part is unavailable. Current transfer ratios, output voltage limits, and saturation characteristics vary across these alternatives and must be evaluated against specific application requirements.

Key Parameters Determining Substitution:

Number of Channels: 2 (mandatory)
Output Type: Transistor (mandatory)
Mounting Type: Surface Mount (mandatory)
Package Type: 8-SOIC (mandatory)
Isolation Voltage: 3000Vrms minimum (ACPL-227-56CE baseline)
Operating Temperature Range: -55°C minimum to 100°C minimum (application dependent)

Parameter Comparison

Part Number	Manufacturer	Channels	Isolation (Vrms)	CTR Min @ Test Current	CTR Max @ Test Current	Vout Max (V)	Iout / Channel (mA)	Vce Sat Max (mV)	Temp Range (°C)	Package
ACPL-227-56CE	Broadcom	2	3000	200% @ 5mA	400% @ 5mA	80	50	400	-55 to 110	8-SOIC (4.40mm)
ACPL-227-50CE	Broadcom	2	3000	200% @ 5mA	400% @ 5mA	80	50	400	-55 to 110	8-SOIC (4.40mm)
ILD1206T	Vishay	2	4000	63% @ 10mA	125% @ 10mA	70	—	400	-55 to 110	8-SOIC (3.90mm)
ILD1207T	Vishay	2	4000	100% @ 10mA	200% @ 10mA	70	—	400	-55 to 110	8-SOIC (3.90mm)
ILD205T	Vishay	2	4000	40% @ 10mA	80% @ 10mA	70	—	400	-55 to 100	8-SOIC (3.90mm)
ILD206T	Vishay	2	4000	63% @ 10mA	125% @ 10mA	70	—	400	-55 to 100	8-SOIC (3.90mm)
ILD217T	Vishay	2	4000	100% @ 1mA	—	70	—	400	-55 to 100	8-SOIC (3.90mm)
MOCD207D2M	onsemi	2	2500	100% @ 10mA	200% @ 10mA	70	150	400	-40 to 100	8-SOIC (3.90mm)
MOCD207M	onsemi	2	2500	100% @ 10mA	200% @ 10mA	70	150	400	-40 to 100	8-SOIC (3.90mm)
MOCD207R2M	onsemi	2	2500	100% @ 10mA	200% @ 10mA	70	150	400	-40 to 100	8-SOIC (3.90mm)
MOCD207R2VM	onsemi	2	2500	100% @ 10mA	200% @ 10mA	70	150	400	-40 to 100	8-SOIC (3.90mm)

Engineering Selection Recommendations

Direct Replacement (Preferred) ACPL-227-50CE is the recommended equivalent for ACPL-227-56CE. Both parts are manufactured by Broadcom Limited, share identical electrical specifications, and maintain ROHS3 compliance and MSL Level 1 rating. The primary difference is packaging format (Cut Tape & Digi-Reel vs. standard), which does not affect electrical performance. This part has higher inventory availability (4400 units) and is suitable for immediate substitution.

Higher Isolation Voltage Alternatives Vishay ILD series (ILD1206T, ILD1207T, ILD205T, ILD206T, ILD217T) and onsemi MOCD207 series provide increased isolation voltage (4000Vrms or 2500Vrms respectively) in 8-SOIC packages. These alternatives are appropriate when application requirements demand higher isolation margins beyond the 3000Vrms baseline. All alternatives maintain ROHS3 compliance and MSL Level 1 rating. Selection among these alternatives depends on current transfer ratio requirements and operating temperature specifications.

Compliance and Regulatory Status All listed parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), ECCN EAR99 classification, and HTSUS code 8541.49.8000. All parts are active in production status. Regulatory and compliance requirements do not differentiate substitution suitability among these alternatives.

Frequently Asked Questions (FAQ)

Q: Can ACPL-227-50CE be used as a direct replacement for ACPL-227-56CE? A: Yes. Both parts are Broadcom optoisolators with identical electrical specifications: 2 channels, 3000Vrms isolation, 200-400% current transfer ratio at 5mA, 80V maximum output voltage, 50mA per-channel output, and -55°C to 110°C operating range. The packaging format differs (Cut Tape & Digi-Reel vs. standard), but both are 8-SOIC surface mount configurations with equivalent electrical performance.

Q: What is the difference between the Broadcom ACPL-227 series and Vishay ILD series alternatives? A: The primary difference is isolation voltage rating. ACPL-227-56CE provides 3000Vrms isolation, while Vishay ILD series parts provide 4000Vrms isolation. Vishay alternatives also have different current transfer ratio specifications and package dimensions (3.90mm vs. 4.40mm width). Vishay parts are suitable when higher isolation voltage margins are required or when the Broadcom part is unavailable.

Q: Are onsemi MOCD207 parts suitable substitutes for ACPL-227-56CE? A: onsemi MOCD207 parts provide 2500Vrms isolation, which is lower than the ACPL-227-56CE baseline of 3000Vrms. These parts are suitable only in applications where 2500Vrms isolation is acceptable. MOCD207 variants offer higher per-channel output current (150mA vs. 50mA) and may be preferred in high-current applications. Operating temperature range is -40°C to 100°C, which is narrower than ACPL-227-56CE (-55°C to 110°C).

Q: Do package dimension differences affect substitution compatibility? A: Package dimensions (8-SOIC 4.40mm vs. 3.90mm width) may affect PCB layout and footprint compatibility. Verify that the target PCB footprint accommodates the substitute part's physical dimensions before implementation. All listed parts use 8-SOIC surface mount configuration and are mechanically compatible with standard 8-SOIC sockets and reflow soldering processes.

Q: What compliance certifications apply to all substitute parts? A: All listed parts maintain ROHS3 compliance, MSL Level 1 (Unlimited moisture sensitivity), ECCN EAR99 classification, and HTSUS code 8541.49.8000. All parts are active in production status. Regulatory and compliance requirements do not differentiate substitution suitability.

Q: How do current transfer ratio specifications differ among alternatives? A: Current transfer ratio (CTR) varies significantly across alternatives and is measured at different test currents. ACPL-227-56CE specifies 200-400% CTR at 5mA. Vishay ILD series parts specify CTR at 10mA (ranging from 40% to 100% minimum). onsemi MOCD207 parts specify 100-200% CTR at 10mA. Application circuits must accommodate these CTR variations to ensure proper isolation and signal integrity.

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