HCPL-177K Equivalent & Substitute Parts

Part Overview

The HCPL-177K is a 4-channel optoisolator with Darlington output manufactured by Broadcom Limited. This component provides 1500VDC isolation and is designed for applications requiring galvanic isolation between logic and power circuits. The part is active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory compliance to ensure direct functional equivalence in circuit applications.

Substiute Parts

HCPL-177K

Broadcom LimitedIn Stock: 993HCPL-177K Datasheet

Current PartRFQ

6N140A

Broadcom LimitedIn Stock: 13596N140A Datasheet

Parametric EquivalentRFQ

6N140A/883B

Broadcom LimitedIn Stock: 46056N140A/883B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCPL-177K are qualified based on the following critical parameters that determine functional equivalence:

• Number of Channels: 4 channels required
• Voltage - Isolation: 1500VDC minimum isolation rating
• Current Transfer Ratio (Min): 200% @ 5mA
• Output Type: Darlington configuration
• Voltage - Output (Max): 20V maximum output voltage
• Current - Output / Channel: 40mA per channel
• Turn On / Turn Off Time (Typ): 2µs on, 8µs off
• Operating Temperature Range: -55°C ~ 125°C
• Package / Case: 16-DIP (0.300", 7.62mm) through-hole mounting
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The substitute parts listed below match all specified electrical and mechanical parameters, ensuring direct compatibility in existing circuit designs without modification.

Parameter Comparison

Engineering Selection Recommendations

All three parts—HCPL-177K, 6N140A, and 6N140A/883B—are active production components from Broadcom Limited with identical electrical specifications and mechanical packaging. Selection between these parts is based on availability and regulatory requirements:

• HCPL-177K: Primary part number with 956 units in stock. Suitable for standard industrial and commercial applications.
• 6N140A: Parametric equivalent with 1255 units in stock. Direct substitute for HCPL-177K with no functional differences.
• 6N140A/883B: Parametric equivalent with 4540 units in stock. Includes MIL-STD-883 qualification, suitable for aerospace, defense, and high-reliability applications requiring enhanced screening and testing protocols.

All parts maintain ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1). Through-hole 16-DIP packaging ensures compatibility with existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can 6N140A be used as a direct replacement for HCPL-177K? A: Yes. The 6N140A is a parametric equivalent with identical electrical specifications, isolation voltage, channel count, output current rating, and 16-DIP package configuration. No circuit modifications are required.

Q: What is the difference between 6N140A and 6N140A/883B? A: Both parts have identical electrical and mechanical specifications. The 6N140A/883B includes MIL-STD-883 qualification, which involves additional manufacturing screening, testing, and documentation. This qualification is required for aerospace and defense applications but is not necessary for standard industrial use.

Q: Are all three parts pin-compatible? A: Yes. All three parts use the 16-DIP (0.300", 7.62mm) through-hole package with identical pinout and electrical characteristics, ensuring direct PCB compatibility.

Q: Do these parts meet RoHS requirements? A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the isolation voltage rating, and why is it important? A: All three parts provide 1500VDC isolation, which defines the maximum voltage difference that can be safely applied between the input and output sides of the optoisolator. This rating ensures galvanic isolation in high-voltage circuit applications.

Q: Can these parts operate in extended temperature ranges? A: All three parts operate across -55°C to 125°C, covering industrial and military temperature specifications. Verify specific application requirements against this range.